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/* Top level of GNU C compiler
Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* This is the top level of cc1/c++.
It parses command args, opens files, invokes the various passes
in the proper order, and counts the time used by each.
Error messages and low-level interface to malloc also handled here. */
#include "config.h"
#undef FLOAT /* This is for hpux. They should change hpux. */
#undef FFS /* Some systems define this in param.h. */
#include "system.h"
#include <signal.h>
#include <setjmp.h>
#ifdef HAVE_SYS_RESOURCE_H
# include <sys/resource.h>
#endif
#ifdef HAVE_SYS_TIMES_H
# include <sys/times.h>
#endif
#include "input.h"
#include "tree.h"
#include "rtl.h"
#include "tm_p.h"
#include "flags.h"
#include "insn-attr.h"
#include "insn-codes.h"
#include "insn-config.h"
#include "recog.h"
#include "defaults.h"
#include "output.h"
#include "except.h"
#include "function.h"
#include "toplev.h"
#include "expr.h"
#include "basic-block.h"
#include "intl.h"
#include "ggc.h"
#include "graph.h"
#ifdef DWARF_DEBUGGING_INFO
#include "dwarfout.h"
#endif
#if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
#include "dwarf2out.h"
#endif
#if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
#include "dbxout.h"
#endif
#ifdef SDB_DEBUGGING_INFO
#include "sdbout.h"
#endif
#ifdef XCOFF_DEBUGGING_INFO
#include "xcoffout.h"
#endif
#ifdef VMS
/* The extra parameters substantially improve the I/O performance. */
static FILE *
vms_fopen (fname, type)
char * fname;
char * type;
{
/* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
fixed arguments, which matches ANSI's specification but not VAXCRTL's
pre-ANSI implementation. This hack circumvents the mismatch problem. */
FILE *(*vmslib_fopen)() = (FILE *(*)()) fopen;
if (*type == 'w')
return (*vmslib_fopen) (fname, type, "mbc=32",
"deq=64", "fop=tef", "shr=nil");
else
return (*vmslib_fopen) (fname, type, "mbc=32");
}
#define fopen vms_fopen
#endif /* VMS */
#ifndef DEFAULT_GDB_EXTENSIONS
#define DEFAULT_GDB_EXTENSIONS 1
#endif
/* If more than one debugging type is supported, you must define
PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
This is one long line cause VAXC can't handle a \-newline. */
#if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
#ifndef PREFERRED_DEBUGGING_TYPE
You Lose! You must define PREFERRED_DEBUGGING_TYPE!
#endif /* no PREFERRED_DEBUGGING_TYPE */
#else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
so the following code needn't care. */
#ifdef DBX_DEBUGGING_INFO
#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
#endif
#ifdef SDB_DEBUGGING_INFO
#define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
#endif
#ifdef DWARF_DEBUGGING_INFO
#define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
#endif
#ifdef DWARF2_DEBUGGING_INFO
#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
#endif
#ifdef XCOFF_DEBUGGING_INFO
#define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
#endif
#endif /* More than one debugger format enabled. */
/* If still not defined, must have been because no debugging formats
are supported. */
#ifndef PREFERRED_DEBUGGING_TYPE
#define PREFERRED_DEBUGGING_TYPE NO_DEBUG
#endif
#ifndef DIR_SEPARATOR
#define DIR_SEPARATOR '/'
#endif
#if ! (defined (VMS) || defined (OS2))
extern char **environ;
#endif
extern char *version_string;
/* Carry information from ASM_DECLARE_OBJECT_NAME
to ASM_FINISH_DECLARE_OBJECT. */
extern int size_directive_output;
extern tree last_assemble_variable_decl;
static void set_target_switch PROTO((const char *));
static const char *decl_name PROTO((tree, int));
extern void set_fatal_function PROTO((void (*)(const char *, va_list)));
static void float_signal PROTO((int)) ATTRIBUTE_NORETURN;
static void pipe_closed PROTO((int)) ATTRIBUTE_NORETURN;
#ifdef ASM_IDENTIFY_LANGUAGE
/* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
static void output_lang_identify PROTO((FILE *)) ATTRIBUTE_UNUSED;
#endif
static void open_dump_file PROTO((const char *, const char *));
static void close_dump_file PROTO((void (*) (FILE *, rtx), rtx));
static void dump_rtl PROTO((const char *, tree, void (*) (FILE *, rtx), rtx));
static void clean_dump_file PROTO((const char *));
static void compile_file PROTO((char *));
static void display_help PROTO ((void));
static void report_file_and_line PROTO ((const char *, int, int));
static void mark_file_stack PROTO ((void *));
static void decode_d_option PROTO ((const char *));
static int decode_f_option PROTO ((const char *));
static int decode_W_option PROTO ((const char *));
static int decode_g_option PROTO ((const char *));
static unsigned independent_decode_option PROTO ((int, char **, unsigned));
static void print_version PROTO((FILE *, const char *));
static int print_single_switch PROTO((FILE *, int, int, const char *,
const char *, const char *,
const char *, const char *));
static void print_switch_values PROTO((FILE *, int, int, const char *,
const char *, const char *));
/* Length of line when printing switch values. */
#define MAX_LINE 75
/* Name of program invoked, sans directories. */
const char *progname;
/* Copy of arguments to main. */
int save_argc;
char **save_argv;
/* Name of current original source file (what was input to cpp).
This comes from each #-command in the actual input. */
char *input_filename;
/* Name of top-level original source file (what was input to cpp).
This comes from the #-command at the beginning of the actual input.
If there isn't any there, then this is the cc1 input file name. */
char *main_input_filename;
/* Current line number in real source file. */
int lineno;
/* Nonzero if it is unsafe to create any new pseudo registers. */
int no_new_pseudos;
/* Stack of currently pending input files. */
struct file_stack *input_file_stack;
/* Incremented on each change to input_file_stack. */
int input_file_stack_tick;
/* Name to use as base of names for dump output files. */
const char *dump_base_name;
/* Bit flags that specify the machine subtype we are compiling for.
Bits are tested using macros TARGET_... defined in the tm.h file
and set by `-m...' switches. Must be defined in rtlanal.c. */
extern int target_flags;
/* Flags saying which kinds of debugging dump have been requested. */
int rtl_dump = 0;
int rtl_dump_and_exit = 0;
int jump_opt_dump = 0;
int addressof_dump = 0;
int cse_dump = 0;
int gcse_dump = 0;
int loop_dump = 0;
int cse2_dump = 0;
int branch_prob_dump = 0;
int flow_dump = 0;
int combine_dump = 0;
int regmove_dump = 0;
int sched_dump = 0;
int local_reg_dump = 0;
int global_reg_dump = 0;
int flow2_dump = 0;
int peephole2_dump = 0;
int sched2_dump = 0;
int jump2_opt_dump = 0;
#ifdef DELAY_SLOTS
int dbr_sched_dump = 0;
#endif
int flag_print_asm_name = 0;
#ifdef STACK_REGS
int stack_reg_dump = 0;
#endif
#ifdef MACHINE_DEPENDENT_REORG
int mach_dep_reorg_dump = 0;
#endif
static int flag_print_mem = 0;
static int version_flag = 0;
static char * filename = 0;
enum graph_dump_types graph_dump_format;
/* Name for output file of assembly code, specified with -o. */
char *asm_file_name;
/* Value of the -G xx switch, and whether it was passed or not. */
int g_switch_value;
int g_switch_set;
/* Type(s) of debugging information we are producing (if any).
See flags.h for the definitions of the different possible
types of debugging information. */
enum debug_info_type write_symbols = NO_DEBUG;
/* Level of debugging information we are producing. See flags.h
for the definitions of the different possible levels. */
enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
/* Nonzero means use GNU-only extensions in the generated symbolic
debugging information. */
/* Currently, this only has an effect when write_symbols is set to
DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
int use_gnu_debug_info_extensions = 0;
/* Nonzero means do optimizations. -O.
Particular numeric values stand for particular amounts of optimization;
thus, -O2 stores 2 here. However, the optimizations beyond the basic
ones are not controlled directly by this variable. Instead, they are
controlled by individual `flag_...' variables that are defaulted
based on this variable. */
int optimize = 0;
/* Nonzero means optimize for size. -Os.
The only valid values are zero and non-zero. When optimize_size is
non-zero, optimize defaults to 2, but certain individual code
bloating optimizations are disabled. */
int optimize_size = 0;
/* Number of error messages and warning messages so far. */
int errorcount = 0;
int warningcount = 0;
int sorrycount = 0;
/* Pointer to function to compute the name to use to print a declaration.
DECL is the declaration in question.
VERBOSITY determines what information will be printed:
0: DECL_NAME, demangled as necessary.
1: and scope information.
2: and any other information that might be interesting, such as function
parameter types in C++. */
const char *(*decl_printable_name) PROTO ((tree, int));
/* Pointer to function to compute rtl for a language-specific tree code. */
typedef rtx (*lang_expand_expr_t)
PROTO ((union tree_node *, rtx, enum machine_mode,
enum expand_modifier modifier));
lang_expand_expr_t lang_expand_expr = 0;
tree (*lang_expand_constant) PROTO((tree)) = 0;
/* Pointer to function to finish handling an incomplete decl at the
end of compilation. */
void (*incomplete_decl_finalize_hook) PROTO((tree)) = 0;
/* Nonzero if generating code to do profiling. */
int profile_flag = 0;
/* Nonzero if generating code to do profiling on a line-by-line basis. */
int profile_block_flag;
/* Nonzero if generating code to profile program flow graph arcs. */
int profile_arc_flag = 0;
/* Nonzero if generating info for gcov to calculate line test coverage. */
int flag_test_coverage = 0;
/* Nonzero indicates that branch taken probabilities should be calculated. */
int flag_branch_probabilities = 0;
/* Nonzero for -pedantic switch: warn about anything
that standard spec forbids. */
int pedantic = 0;
/* Temporarily suppress certain warnings.
This is set while reading code from a system header file. */
int in_system_header = 0;
/* Nonzero means do stupid register allocation.
Currently, this is 1 if `optimize' is 0. */
int obey_regdecls = 0;
/* Don't print functions as they are compiled and don't print
times taken by the various passes. -quiet. */
int quiet_flag = 0;
/* -f flags. */
/* Nonzero means `char' should be signed. */
int flag_signed_char;
/* Nonzero means give an enum type only as many bytes as it needs. */
int flag_short_enums;
/* Nonzero for -fcaller-saves: allocate values in regs that need to
be saved across function calls, if that produces overall better code.
Optional now, so people can test it. */
#ifdef DEFAULT_CALLER_SAVES
int flag_caller_saves = 1;
#else
int flag_caller_saves = 0;
#endif
/* Nonzero if structures and unions should be returned in memory.
This should only be defined if compatibility with another compiler or
with an ABI is needed, because it results in slower code. */
#ifndef DEFAULT_PCC_STRUCT_RETURN
#define DEFAULT_PCC_STRUCT_RETURN 1
#endif
/* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
/* Nonzero for -fforce-mem: load memory value into a register
before arithmetic on it. This makes better cse but slower compilation. */
int flag_force_mem = 0;
/* Nonzero for -fforce-addr: load memory address into a register before
reference to memory. This makes better cse but slower compilation. */
int flag_force_addr = 0;
/* Nonzero for -fdefer-pop: don't pop args after each function call;
instead save them up to pop many calls' args with one insns. */
int flag_defer_pop = 0;
/* Nonzero for -ffloat-store: don't allocate floats and doubles
in extended-precision registers. */
int flag_float_store = 0;
/* Nonzero for -fcse-follow-jumps:
have cse follow jumps to do a more extensive job. */
int flag_cse_follow_jumps;
/* Nonzero for -fcse-skip-blocks:
have cse follow a branch around a block. */
int flag_cse_skip_blocks;
/* Nonzero for -fexpensive-optimizations:
perform miscellaneous relatively-expensive optimizations. */
int flag_expensive_optimizations;
/* Nonzero for -fthread-jumps:
have jump optimize output of loop. */
int flag_thread_jumps;
/* Nonzero enables strength-reduction in loop.c. */
int flag_strength_reduce = 0;
/* Nonzero enables loop unrolling in unroll.c. Only loops for which the
number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
unrolled. */
int flag_unroll_loops;
/* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
This is generally not a win. */
int flag_unroll_all_loops;
/* Nonzero forces all invariant computations in loops to be moved
outside the loop. */
int flag_move_all_movables = 0;
/* Nonzero forces all general induction variables in loops to be
strength reduced. */
int flag_reduce_all_givs = 0;
/* Nonzero to perform full register move optimization passes. This is the
default for -O2. */
int flag_regmove = 0;
/* Nonzero for -fwritable-strings:
store string constants in data segment and don't uniquize them. */
int flag_writable_strings = 0;
/* Nonzero means don't put addresses of constant functions in registers.
Used for compiling the Unix kernel, where strange substitutions are
done on the assembly output. */
int flag_no_function_cse = 0;
/* Nonzero for -fomit-frame-pointer:
don't make a frame pointer in simple functions that don't require one. */
int flag_omit_frame_pointer = 0;
/* Nonzero means place each function into its own section on those platforms
which support arbitrary section names and unlimited numbers of sections. */
int flag_function_sections = 0;
/* ... and similar for data. */
int flag_data_sections = 0;
/* Nonzero to inhibit use of define_optimization peephole opts. */
int flag_no_peephole = 0;
/* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
operations in the interest of optimization. For example it allows
GCC to assume arguments to sqrt are nonnegative numbers, allowing
faster code for sqrt to be generated. */
int flag_fast_math = 0;
/* Nonzero means the front end generally wants `errno' maintained by math
operations, like built-in SQRT, unless overridden by flag_fast_math. */
int flag_errno_math = 1;
/* 0 means straightforward implementation of complex divide acceptable.
1 means wide ranges of inputs must work for complex divide.
2 means C9X-like requirements for complex divide (not yet implemented). */
int flag_complex_divide_method = 0;
/* Nonzero means all references through pointers are volatile. */
int flag_volatile;
/* Nonzero means treat all global and extern variables as volatile. */
int flag_volatile_global;
/* Nonzero means treat all static variables as volatile. */
int flag_volatile_static;
/* Nonzero means just do syntax checking; don't output anything. */
int flag_syntax_only = 0;
/* Nonzero means perform global cse. */
static int flag_gcse;
/* Nonzero means to use global dataflow analysis to eliminate
useless null pointer tests. */
static int flag_delete_null_pointer_checks;
/* Nonzero means to rerun cse after loop optimization. This increases
compilation time about 20% and picks up a few more common expressions. */
static int flag_rerun_cse_after_loop;
/* Nonzero means to run loop optimizations twice. */
int flag_rerun_loop_opt;
/* Nonzero for -finline-functions: ok to inline functions that look like
good inline candidates. */
int flag_inline_functions;
/* Nonzero for -fkeep-inline-functions: even if we make a function
go inline everywhere, keep its definition around for debugging
purposes. */
int flag_keep_inline_functions;
/* Nonzero means that functions will not be inlined. */
int flag_no_inline;
/* Nonzero means that we should emit static const variables
regardless of whether or not optimization is turned on. */
int flag_keep_static_consts = 1;
/* Nonzero means we should be saving declaration info into a .X file. */
int flag_gen_aux_info = 0;
/* Specified name of aux-info file. */
static char *aux_info_file_name;
/* Nonzero means make the text shared if supported. */
int flag_shared_data;
/* Nonzero means schedule into delayed branch slots if supported. */
int flag_delayed_branch;
/* Nonzero if we are compiling pure (sharable) code.
Value is 1 if we are doing reasonable (i.e. simple
offset into offset table) pic. Value is 2 if we can
only perform register offsets. */
int flag_pic;
/* Nonzero means generate extra code for exception handling and enable
exception handling. */
int flag_exceptions;
/* Nonzero means use the new model for exception handling. Replaces
-DNEW_EH_MODEL as a compile option. */
int flag_new_exceptions = 1;
/* Nonzero means generate frame unwind info table when supported */
int flag_unwind_tables = 0;
/* Nonzero means don't place uninitialized global data in common storage
by default. */
int flag_no_common;
/* Nonzero means pretend it is OK to examine bits of target floats,
even if that isn't true. The resulting code will have incorrect constants,
but the same series of instructions that the native compiler would make. */
int flag_pretend_float;
/* Nonzero means change certain warnings into errors.
Usually these are warnings about failure to conform to some standard. */
int flag_pedantic_errors = 0;
/* flag_schedule_insns means schedule insns within basic blocks (before
local_alloc).
flag_schedule_insns_after_reload means schedule insns after
global_alloc. */
int flag_schedule_insns = 0;
int flag_schedule_insns_after_reload = 0;
/* The following flags have effect only for scheduling before register
allocation:
flag_schedule_interblock means schedule insns accross basic blocks.
flag_schedule_speculative means allow speculative motion of non-load insns.
flag_schedule_speculative_load means allow speculative motion of some
load insns.
flag_schedule_speculative_load_dangerous allows speculative motion of more
load insns. */
int flag_schedule_interblock = 1;
int flag_schedule_speculative = 1;
int flag_schedule_speculative_load = 0;
int flag_schedule_speculative_load_dangerous = 0;
/* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
by a cheaper branch, on a count register. */
int flag_branch_on_count_reg;
/* -finhibit-size-directive inhibits output of .size for ELF.
This is used only for compiling crtstuff.c,
and it may be extended to other effects
needed for crtstuff.c on other systems. */
int flag_inhibit_size_directive = 0;
/* -fverbose-asm causes extra commentary information to be produced in
the generated assembly code (to make it more readable). This option
is generally only of use to those who actually need to read the
generated assembly code (perhaps while debugging the compiler itself).
-fno-verbose-asm, the default, causes the extra information
to be omitted and is useful when comparing two assembler files. */
int flag_verbose_asm = 0;
/* -dA causes debug commentary information to be produced in
the generated assembly code (to make it more readable). This option
is generally only of use to those who actually need to read the
generated assembly code (perhaps while debugging the compiler itself).
Currently, this switch is only used by dwarfout.c; however, it is intended
to be a catchall for printing debug information in the assembler file. */
int flag_debug_asm = 0;
/* -fgnu-linker specifies use of the GNU linker for initializations.
(Or, more generally, a linker that handles initializations.)
-fno-gnu-linker says that collect2 will be used. */
#ifdef USE_COLLECT2
int flag_gnu_linker = 0;
#else
int flag_gnu_linker = 1;
#endif
/* Tag all structures with __attribute__(packed) */
int flag_pack_struct = 0;
/* Emit code to check for stack overflow; also may cause large objects
to be allocated dynamically. */
int flag_stack_check;
/* When non-NULL, indicates that whenever space is allocated on the
stack, the resulting stack pointer must not pass this
address---that is, for stacks that grow downward, the stack pointer
must always be greater than or equal to this address; for stacks
that grow upward, the stack pointer must be less than this address.
At present, the rtx may be either a REG or a SYMBOL_REF, although
the support provided depends on the backend. */
rtx stack_limit_rtx;
/* -fcheck-memory-usage causes extra code to be generated in order to check
memory accesses. This is used by a detector of bad memory accesses such
as Checker. */
int flag_check_memory_usage = 0;
/* -fprefix-function-name causes function name to be prefixed. This
can be used with -fcheck-memory-usage to isolate code compiled with
-fcheck-memory-usage. */
int flag_prefix_function_name = 0;
/* 0 if pointer arguments may alias each other. True in C.
1 if pointer arguments may not alias each other but may alias
global variables.
2 if pointer arguments may not alias each other and may not
alias global variables. True in Fortran.
This defaults to 0 for C. */
int flag_argument_noalias = 0;
/* Nonzero if we should do (language-dependent) alias analysis.
Typically, this analysis will assume that expressions of certain
types do not alias expressions of certain other types. Only used
if alias analysis (in general) is enabled. */
int flag_strict_aliasing = 0;
/* Instrument functions with calls at entry and exit, for profiling. */
int flag_instrument_function_entry_exit = 0;
/* Nonzero means ignore `#ident' directives. 0 means handle them.
On SVR4 targets, it also controls whether or not to emit a
string identifying the compiler. */
int flag_no_ident = 0;
/* This will perform a peephole pass before sched2. */
int flag_peephole2 = 0;
/* -fbounded-pointers causes gcc to compile pointers as composite
objects occupying three words: the pointer value, the base address
of the referent object, and the address immediately beyond the end
of the referent object. The base and extent allow us to perform
runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
int flag_bounded_pointers = 0;
/* -fcheck-bounds causes gcc to generate array bounds checks.
For C, C++: defaults to value of flag_bounded_pointers.
For ObjC: defaults to off.
For Java: defaults to on.
For Fortran: defaults to off.
For CHILL: defaults to off. */
int flag_bounds_check = 0;
/* If one, renumber instruction UIDs to reduce the number of
unused UIDs if there are a lot of instructions. If greater than
one, unconditionally renumber instruction UIDs. */
int flag_renumber_insns = 1;
/* Values of the -falign-* flags: how much to align labels in code.
0 means `use default', 1 means `don't align'.
For each variable, there is an _log variant which is the power
of two not less than the variable, for .align output. */
int align_loops;
int align_loops_log;
int align_jumps;
int align_jumps_log;
int align_labels;
int align_labels_log;
int align_functions;
int align_functions_log;
/* Table of supported debugging formats. */
static struct
{
const char * arg;
/* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
constant expression, we use NO_DEBUG in its place. */
enum debug_info_type debug_type;
int use_extensions_p;
const char * description;
} *da,
debug_args[] =
{
{ "", NO_DEBUG, DEFAULT_GDB_EXTENSIONS,
"Generate default debug format output" },
{ "gdb", NO_DEBUG, 1, "Generate default extended debug format output" },
#ifdef DBX_DEBUGGING_INFO
{ "stabs", DBX_DEBUG, 0, "Generate STABS format debug output" },
{ "stabs+", DBX_DEBUG, 1, "Generate extended STABS format debug output" },
#endif
#ifdef DWARF_DEBUGGING_INFO
{ "dwarf", DWARF_DEBUG, 0, "Generate DWARF-1 format debug output"},
{ "dwarf+", DWARF_DEBUG, 1,
"Generated extended DWARF-1 format debug output" },
#endif
#ifdef DWARF2_DEBUGGING_INFO
{ "dwarf-2", DWARF2_DEBUG, 0, "Enable DWARF-2 debug output" },
#endif
#ifdef XCOFF_DEBUGGING_INFO
{ "xcoff", XCOFF_DEBUG, 0, "Generate XCOFF format debug output" },
{ "xcoff+", XCOFF_DEBUG, 1, "Generate extended XCOFF format debug output" },
#endif
#ifdef SDB_DEBUGGING_INFO
{ "coff", SDB_DEBUG, 0, "Generate COFF format debug output" },
#endif
{ 0, 0, 0, 0 }
};
typedef struct
{
const char * string;
int * variable;
int on_value;
const char * description;
}
lang_independent_options;
/* Add or remove a leading underscore from user symbols. */
int flag_leading_underscore = -1;
/* The user symbol prefix after having resolved same. */
const char *user_label_prefix;
/* A default for same. */
#ifndef USER_LABEL_PREFIX
#define USER_LABEL_PREFIX ""
#endif
/* Table of language-independent -f options.
STRING is the option name. VARIABLE is the address of the variable.
ON_VALUE is the value to store in VARIABLE
if `-fSTRING' is seen as an option.
(If `-fno-STRING' is seen as an option, the opposite value is stored.) */
lang_independent_options f_options[] =
{
{"float-store", &flag_float_store, 1,
"Do not store floats in registers" },
{"volatile", &flag_volatile, 1,
"Consider all mem refs through pointers as volatile"},
{"volatile-global", &flag_volatile_global, 1,
"Consider all mem refs to global data to be volatile" },
{"volatile-static", &flag_volatile_static, 1,
"Consider all mem refs to static data to be volatile" },
{"defer-pop", &flag_defer_pop, 1,
"Defer popping functions args from stack until later" },
{"omit-frame-pointer", &flag_omit_frame_pointer, 1,
"When possible do not generate stack frames"},
{"cse-follow-jumps", &flag_cse_follow_jumps, 1,
"When running CSE, follow jumps to their targets" },
{"cse-skip-blocks", &flag_cse_skip_blocks, 1,
"When running CSE, follow conditional jumps" },
{"expensive-optimizations", &flag_expensive_optimizations, 1,
"Perform a number of minor, expensive optimisations" },
{"thread-jumps", &flag_thread_jumps, 1,
"Perform jump threading optimisations"},
{"strength-reduce", &flag_strength_reduce, 1,
"Perform strength reduction optimisations" },
{"unroll-loops", &flag_unroll_loops, 1,
"Perform loop unrolling when iteration count is known" },
{"unroll-all-loops", &flag_unroll_all_loops, 1,
"Perform loop unrolling for all loops" },
{"move-all-movables", &flag_move_all_movables, 1,
"Force all loop invariant computations out of loops" },
{"reduce-all-givs", &flag_reduce_all_givs, 1,
"Strength reduce all loop general induction variables" },
{"writable-strings", &flag_writable_strings, 1,
"Store strings in writable data section" },
{"peephole", &flag_no_peephole, 0,
"Enable machine specific peephole optimisations" },
{"force-mem", &flag_force_mem, 1,
"Copy memory operands into registers before using" },
{"force-addr", &flag_force_addr, 1,
"Copy memory address constants into regs before using" },
{"function-cse", &flag_no_function_cse, 0,
"Allow function addresses to be held in registers" },
{"inline-functions", &flag_inline_functions, 1,
"Integrate simple functions into their callers" },
{"keep-inline-functions", &flag_keep_inline_functions, 1,
"Generate code for funcs even if they are fully inlined" },
{"inline", &flag_no_inline, 0,
"Pay attention to the 'inline' keyword"},
{"keep-static-consts", &flag_keep_static_consts, 1,
"Emit static const variables even if they are not used" },
{"syntax-only", &flag_syntax_only, 1,
"Check for syntax errors, then stop" },
{"shared-data", &flag_shared_data, 1,
"Mark data as shared rather than private" },
{"caller-saves", &flag_caller_saves, 1,
"Enable saving registers around function calls" },
{"pcc-struct-return", &flag_pcc_struct_return, 1,
"Return 'short' aggregates in memory, not registers" },
{"reg-struct-return", &flag_pcc_struct_return, 0,
"Return 'short' aggregates in registers" },
{"delayed-branch", &flag_delayed_branch, 1,
"Attempt to fill delay slots of branch instructions" },
{"gcse", &flag_gcse, 1,
"Perform the global common subexpression elimination" },
{"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1,
"Run CSE pass after loop optimisations"},
{"rerun-loop-opt", &flag_rerun_loop_opt, 1,
"Run the loop optimiser twice"},
{"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1,
"Delete useless null pointer checks" },
{"pretend-float", &flag_pretend_float, 1,
"Pretend that host and target use the same FP format"},
{"schedule-insns", &flag_schedule_insns, 1,
"Reschedule instructions to avoid pipeline stalls"},
{"schedule-insns2", &flag_schedule_insns_after_reload, 1,
"Run two passes of the instruction scheduler"},
{"sched-interblock",&flag_schedule_interblock, 1,
"Enable scheduling across basic blocks" },
{"sched-spec",&flag_schedule_speculative, 1,
"Allow speculative motion of non-loads" },
{"sched-spec-load",&flag_schedule_speculative_load, 1,
"Allow speculative motion of some loads" },
{"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1,
"Allow speculative motion of more loads" },
{"branch-count-reg",&flag_branch_on_count_reg, 1,
"Replace add,compare,branch with branch on count reg"},
{"pic", &flag_pic, 1,
"Generate position independent code, if possible"},
{"PIC", &flag_pic, 2, ""},
{"exceptions", &flag_exceptions, 1,
"Enable exception handling" },
{"new-exceptions", &flag_new_exceptions, 1,
"Use the new model for exception handling" },
{"unwind-tables", &flag_unwind_tables, 1,
"Just generate unwind tables for exception handling" },
{"sjlj-exceptions", &exceptions_via_longjmp, 1,
"Use setjmp/longjmp to handle exceptions" },
{"asynchronous-exceptions", &asynchronous_exceptions, 1,
"Support asynchronous exceptions" },
{"profile-arcs", &profile_arc_flag, 1,
"Insert arc based program profiling code" },
{"test-coverage", &flag_test_coverage, 1,
"Create data files needed by gcov" },
{"branch-probabilities", &flag_branch_probabilities, 1,
"Use profiling information for branch probabilities" },
{"fast-math", &flag_fast_math, 1,
"Improve FP speed by violating ANSI & IEEE rules" },
{"common", &flag_no_common, 0,
"Do not put unitialised globals in the common section" },
{"inhibit-size-directive", &flag_inhibit_size_directive, 1,
"Do not generate .size directives" },
{"function-sections", &flag_function_sections, 1,
"place each function into its own section" },
{"data-sections", &flag_data_sections, 1,
"place data items into their own section" },
{"verbose-asm", &flag_verbose_asm, 1,
"Add extra commentry to assembler output"},
{"gnu-linker", &flag_gnu_linker, 1,
"Output GNU ld formatted global initialisers"},
{"regmove", &flag_regmove, 1,
"Enables a register move optimisation"},
{"optimize-register-move", &flag_regmove, 1,
"Do the full regmove optimization pass"},
{"pack-struct", &flag_pack_struct, 1,
"Pack structure members together without holes" },
{"stack-check", &flag_stack_check, 1,
"Insert stack checking code into the program" },
{"argument-alias", &flag_argument_noalias, 0,
"Specify that arguments may alias each other & globals"},
{"argument-noalias", &flag_argument_noalias, 1,
"Assume arguments may alias globals but not each other"},
{"argument-noalias-global", &flag_argument_noalias, 2,
"Assume arguments do not alias each other or globals" },
{"strict-aliasing", &flag_strict_aliasing, 1,
"Assume strict aliasing rules apply" },
{"align-loops", &align_loops, 0,
"Align the start of loops" },
{"align-jumps", &align_jumps, 0,
"Align labels which are only reached by jumping" },
{"align-labels", &align_labels, 0,
"Align all labels" },
{"align-functions", &align_functions, 0,
"Align the start of functions" },
{"check-memory-usage", &flag_check_memory_usage, 1,
"Generate code to check every memory access" },
{"prefix-function-name", &flag_prefix_function_name, 1,
"Add a prefix to all function names" },
{"dump-unnumbered", &flag_dump_unnumbered, 1,
"Suppress output of instruction numbers and line number notes in debugging dumps"},
{"instrument-functions", &flag_instrument_function_entry_exit, 1,
"Instrument function entry/exit with profiling calls"},
{"leading-underscore", &flag_leading_underscore, 1,
"External symbols have a leading underscore" },
{"ident", &flag_no_ident, 0,
"Process #ident directives"},
{ "peephole2", &flag_peephole2, 1,
"Enables an rtl peephole pass run before sched2" },
{"math-errno", &flag_errno_math, 1,
"Set errno after built-in math functions"},
{"bounded-pointers", &flag_bounded_pointers, 1,
"Compile pointers as triples: value, base & end" },
{"bounds-check", &flag_bounds_check, 1,
"Generate code to check bounds before dereferencing pointers and arrays" }
};
#define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
/* Table of language-specific options. */
static struct lang_opt
{
const char * option;
const char * description;
}
documented_lang_options[] =
{
/* In order not to overload the --help output, the convention
used here is to only describe those options which are not
enabled by default. */
{ "-ansi", "Compile just for ANSI C" },
{ "-fallow-single-precision",
"Do not promote floats to double if using -traditional" },
{ "-std= ", "Determine language standard"},
{ "-fsigned-bitfields", "" },
{ "-funsigned-bitfields","Make bitfields by unsigned by default" },
{ "-fno-signed-bitfields", "" },
{ "-fno-unsigned-bitfields","" },
{ "-fsigned-char", "Make 'char' be signed by default"},
{ "-funsigned-char", "Make 'char' be unsigned by default"},
{ "-fno-signed-char", "" },
{ "-fno-unsigned-char", "" },
{ "-ftraditional", "" },
{ "-traditional", "Attempt to support traditional K&R style C"},
{ "-fnotraditional", "" },
{ "-fno-traditional", "" },
{ "-fasm", "" },
{ "-fno-asm", "Do not recognise the 'asm' keyword" },
{ "-fbuiltin", "" },
{ "-fno-builtin", "Do not recognise any built in functions" },
{ "-fhosted", "Assume normal C execution environment" },
{ "-fno-hosted", "" },
{ "-ffreestanding",
"Assume that standard libraries & main might not exist" },
{ "-fno-freestanding", "" },
{ "-fcond-mismatch", "Allow different types as args of ? operator"},
{ "-fno-cond-mismatch", "" },
{ "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
{ "-fno-dollars-in-identifiers", "" },
{ "-fpreprocessed", "" },
{ "-fno-preprocessed", "" },
{ "-fshort-double", "Use the same size for double as for float" },
{ "-fno-short-double", "" },
{ "-fshort-enums", "Use the smallest fitting integer to hold enums"},
{ "-fno-short-enums", "" },
{ "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
{ "-fno-short-wchar", "" },
{ "-Wall", "Enable most warning messages" },
{ "-Wbad-function-cast",
"Warn about casting functions to incompatible types" },
{ "-Wno-bad-function-cast", "" },
{ "-Wmissing-noreturn",
"Warn about functions which might be candidates for attribute noreturn" },
{ "-Wno-missing-noreturn", "" },
{ "-Wcast-qual", "Warn about casts which discard qualifiers"},
{ "-Wno-cast-qual", "" },
{ "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
{ "-Wno-char-subscripts", "" },
{ "-Wcomment", "Warn if nested comments are detected" },
{ "-Wno-comment", "" },
{ "-Wcomments", "Warn if nested comments are detected" },
{ "-Wno-comments", "" },
{ "-Wconversion", "Warn about possibly confusing type conversions" },
{ "-Wno-conversion", "" },
{ "-Wformat", "Warn about printf format anomalies" },
{ "-Wno-format", "" },
{ "-Wimplicit-function-declaration",
"Warn about implicit function declarations" },
{ "-Wno-implicit-function-declaration", "" },
{ "-Werror-implicit-function-declaration", "" },
{ "-Wimplicit-int", "Warn when a declaration does not specify a type" },
{ "-Wno-implicit-int", "" },
{ "-Wimplicit", "" },
{ "-Wno-implicit", "" },
{ "-Wimport", "Warn about the use of the #import directive" },
{ "-Wno-import", "" },
{ "-Wlong-long","" },
{ "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
{ "-Wmain", "Warn about suspicious declarations of main" },
{ "-Wno-main", "" },
{ "-Wmissing-braces",
"Warn about possibly missing braces around initialisers" },
{ "-Wno-missing-braces", "" },
{ "-Wmissing-declarations",
"Warn about global funcs without previous declarations"},
{ "-Wno-missing-declarations", "" },
{ "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
{ "-Wno-missing-prototypes", "" },
{ "-Wmultichar", "Warn about use of multicharacter literals"},
{ "-Wno-multichar", "" },
{ "-Wnested-externs", "Warn about externs not at file scope level" },
{ "-Wno-nested-externs", "" },
{ "-Wparentheses", "Warn about possible missing parentheses" },
{ "-Wno-parentheses", "" },
{ "-Wpointer-arith", "Warn about function pointer arithmetic" },
{ "-Wno-pointer-arith", "" },
{ "-Wredundant-decls",
"Warn about multiple declarations of the same object" },
{ "-Wno-redundant-decls", "" },
{ "-Wsign-compare", "Warn about signed/unsigned comparisons" },
{ "-Wno-sign-compare", "" },
{ "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
{ "-Wno-float-equal", "" },
{ "-Wunknown-pragmas", "Warn about unrecognised pragmas" },
{ "-Wno-unknown-pragmas", "" },
{ "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
{ "-Wno-strict-prototypes", "" },
{ "-Wtraditional", "Warn about constructs whose meaning change in ANSI C"},
{ "-Wno-traditional", "" },
{ "-Wtrigraphs", "Warn when trigraphs are encountered" },
{ "-Wno-trigraphs", "" },
{ "-Wundef", "" },
{ "-Wno-undef", "" },
{ "-Wwrite-strings", "Mark strings as 'const char *'"},
{ "-Wno-write-strings", "" },
#define DEFINE_LANG_NAME(NAME) { NULL, NAME },
/* These are for Objective C. */
DEFINE_LANG_NAME ("Objective C")
{ "-lang-objc", "" },
{ "-gen-decls", "Dump decls to a .decl file" },
{ "-fgnu-runtime", "Generate code for GNU runtime environment" },
{ "-fno-gnu-runtime", "" },
{ "-fnext-runtime", "Generate code for NeXT runtime environment" },
{ "-fno-next-runtime", "" },
{ "-Wselector", "Warn if a selector has multiple methods" },
{ "-Wno-selector", "" },
{ "-Wprotocol", "" },
{ "-Wno-protocol", "Do not warn if inherited methods are unimplemented"},
{ "-print-objc-runtime-info",
"Generate C header of platform specific features" },
#include "options.h"
};
/* Here is a table, controlled by the tm.h file, listing each -m switch
and which bits in `target_switches' it should set or clear.
If VALUE is positive, it is bits to set.
If VALUE is negative, -VALUE is bits to clear.
(The sign bit is not used so there is no confusion.) */
struct
{
const char * name;
int value;
const char * description;
}
target_switches [] = TARGET_SWITCHES;
/* This table is similar, but allows the switch to have a value. */
#ifdef TARGET_OPTIONS
struct
{
const char * prefix;
const char ** variable;
const char * description;
}
target_options [] = TARGET_OPTIONS;
#endif
/* Options controlling warnings */
/* Don't print warning messages. -w. */
int inhibit_warnings = 0;
/* Print various extra warnings. -W. */
int extra_warnings = 0;
/* Treat warnings as errors. -Werror. */
int warnings_are_errors = 0;
/* Nonzero to warn about unused local variables. */
int warn_unused;
/* Nonzero to warn about code which is never reached. */
int warn_notreached;
/* Nonzero to warn about variables used before they are initialized. */
int warn_uninitialized;
/* Nonzero means warn about all declarations which shadow others. */
int warn_shadow;
/* Warn if a switch on an enum fails to have a case for every enum value. */
int warn_switch;
/* Nonzero means warn about function definitions that default the return type
or that use a null return and have a return-type other than void. */
int warn_return_type;
/* Nonzero means warn about pointer casts that increase the required
alignment of the target type (and might therefore lead to a crash
due to a misaligned access). */
int warn_cast_align;
/* Nonzero means warn about any identifiers that match in the first N
characters. The value N is in `id_clash_len'. */
int warn_id_clash;
unsigned id_clash_len;
/* Nonzero means warn about any objects definitions whose size is larger
than N bytes. Also want about function definitions whose returned
values are larger than N bytes. The value N is in `larger_than_size'. */
int warn_larger_than;
unsigned larger_than_size;
/* Nonzero means warn if inline function is too large. */
int warn_inline;
/* Warn if a function returns an aggregate,
since there are often incompatible calling conventions for doing this. */
int warn_aggregate_return;
/* Warn if packed attribute on struct is unnecessary and inefficient. */
int warn_packed;
/* Warn when gcc pads a structure to an alignment boundary. */
int warn_padded;
/* Likewise for -W. */
lang_independent_options W_options[] =
{
{"unused", &warn_unused, 1, "Warn when a variable is unused" },
{"error", &warnings_are_errors, 1, ""},
{"shadow", &warn_shadow, 1, "Warn when one local variable shadows another" },
{"switch", &warn_switch, 1,
"Warn about enumerated switches missing a specific case" },
{"aggregate-return", &warn_aggregate_return, 1,
"Warn about returning structures, unions or arrays" },
{"cast-align", &warn_cast_align, 1,
"Warn about pointer casts which increase alignment" },
{"unreachable-code", &warn_notreached, 1,
"Warn about code that will never be executed" },
{"uninitialized", &warn_uninitialized, 1,
"Warn about unitialized automatic variables"},
{"inline", &warn_inline, 1,
"Warn when an inlined function cannot be inlined"},
{"packed", &warn_packed, 1,
"Warn when the packed attribute has no effect on struct layout"},
{"padded", &warn_padded, 1,
"Warn when padding is required to align struct members"}
};
/* Output files for assembler code (real compiler output)
and debugging dumps. */
FILE *asm_out_file;
FILE *aux_info_file;
FILE *rtl_dump_file = NULL;
/* Decode the string P as an integral parameter.
If the string is indeed an integer return its numeric value else
issue an Invalid Option error for the option PNAME and return DEFVAL.
If PNAME is zero just return DEFVAL, do not call error. */
int
read_integral_parameter (p, pname, defval)
const char *p;
const char *pname;
const int defval;
{
const char *endp = p;
while (*endp)
{
if (*endp >= '0' && *endp <= '9')
endp++;
else
break;
}
if (*endp != 0)
{
if (pname != 0)
error ("Invalid option `%s'", pname);
return defval;
}
return atoi (p);
}
/* Time accumulators, to count the total time spent in various passes. */
int parse_time;
int varconst_time;
int integration_time;
int jump_time;
int cse_time;
int gcse_time;
int loop_time;
int cse2_time;
int branch_prob_time;
int flow_time;
int combine_time;
int regmove_time;
int sched_time;
int local_alloc_time;
int global_alloc_time;
int flow2_time;
int peephole2_time;
int sched2_time;
int dbr_sched_time;
int shorten_branch_time;
int stack_reg_time;
int final_time;
int symout_time;
int dump_time;
int gc_time;
int all_time;
/* Return time used so far, in microseconds. */
long
get_run_time ()
{
if (quiet_flag)
return 0;
#ifdef __BEOS__
return 0;
#else /* not BeOS */
#if defined (_WIN32) && !defined (__CYGWIN__)
if (clock() < 0)
return 0;
else
return (clock() * 1000);
#else /* not _WIN32 */
#ifdef _SC_CLK_TCK
{
static int tick;
struct tms tms;
if (tick == 0)
tick = 1000000 / sysconf(_SC_CLK_TCK);
times (&tms);
return (tms.tms_utime + tms.tms_stime) * tick;
}
#else
#ifdef USG
{
struct tms tms;
# if HAVE_SYSCONF && defined _SC_CLK_TCK
# define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
# else
# ifdef CLK_TCK
# define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
# else
# define TICKS_PER_SECOND HZ /* traditional UNIX */
# endif
# endif
times (&tms);
return (tms.tms_utime + tms.tms_stime) * (1000000 / TICKS_PER_SECOND);
}
#else
#ifndef VMS
{
struct rusage rusage;
getrusage (0, &rusage);
return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
+ rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
}
#else /* VMS */
{
struct
{
int proc_user_time;
int proc_system_time;
int child_user_time;
int child_system_time;
} vms_times;
times ((void *) &vms_times);
return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
}
#endif /* VMS */
#endif /* USG */
#endif /* _SC_CLK_TCK */
#endif /* _WIN32 */
#endif /* __BEOS__ */
}
#define TIMEVAR(VAR, BODY) \
do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
void
print_time (str, total)
const char *str;
int total;
{
fprintf (stderr,
"time in %s: %d.%06d (%.0f%%)\n",
str, total / 1000000, total % 1000000,
(double)total / (double)all_time * 100.0);
}
/* This is the default decl_printable_name function. */
static const char *
decl_name (decl, verbosity)
tree decl;
int verbosity ATTRIBUTE_UNUSED;
{
return IDENTIFIER_POINTER (DECL_NAME (decl));
}
/* Mark P for GC. Also mark main_input_filename and input_filename. */
static void
mark_file_stack (p)
void *p;
{
struct file_stack *stack = *(struct file_stack **)p;
/* We're only called for input_file_stack, so we can mark the current
input_filename here as well. */
ggc_mark_string (main_input_filename);
ggc_mark_string (input_filename);
while (stack)
{
ggc_mark_string (stack->name);
stack = stack->next;
}
}
/* This calls abort and is used to avoid problems when abort if a macro.
It is used when we need to pass the address of abort. */
void
do_abort ()
{
abort ();
}
/* When `malloc.c' is compiled with `rcheck' defined,
it calls this function to report clobberage. */
void
botch (s)
const char * s ATTRIBUTE_UNUSED;
{
abort ();
}
/* Return the logarithm of X, base 2, considering X unsigned,
if X is a power of 2. Otherwise, returns -1.
This should be used via the `exact_log2' macro. */
int
exact_log2_wide (x)
register unsigned HOST_WIDE_INT x;
{
register int log = 0;
/* Test for 0 or a power of 2. */
if (x == 0 || x != (x & -x))
return -1;
while ((x >>= 1) != 0)
log++;
return log;
}
/* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
If X is 0, return -1.
This should be used via the floor_log2 macro. */
int
floor_log2_wide (x)
register unsigned HOST_WIDE_INT x;
{
register int log = -1;
while (x != 0)
log++,
x >>= 1;
return log;
}
static int float_handler_set;
int float_handled;
jmp_buf float_handler;
/* Signals actually come here. */
static void
float_signal (signo)
/* If this is missing, some compilers complain. */
int signo ATTRIBUTE_UNUSED;
{
if (float_handled == 0)
abort ();
#if defined (USG) || defined (hpux)
signal (SIGFPE, float_signal); /* re-enable the signal catcher */
#endif
float_handled = 0;
signal (SIGFPE, float_signal);
longjmp (float_handler, 1);
}
/* Specify where to longjmp to when a floating arithmetic error happens.
If HANDLER is 0, it means don't handle the errors any more. */
void
set_float_handler (handler)
jmp_buf handler;
{
float_handled = (handler != 0);
if (handler)
bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
if (float_handled && ! float_handler_set)
{
signal (SIGFPE, float_signal);
float_handler_set = 1;
}
}
/* This is a wrapper function for code which might elicit an
arithmetic exception. That code should be passed in as a function
pointer FN, and one argument DATA. DATA is usually a struct which
contains the real input and output for function FN. This function
returns 0 (failure) if longjmp was called (i.e. an exception
occured.) It returns 1 (success) otherwise. */
int
do_float_handler (fn, data)
void (*fn) PROTO ((PTR));
PTR data;
{
jmp_buf buf;
if (setjmp (buf))
{
/* We got here via longjmp() caused by an exception in function fn() */
set_float_handler (NULL);
return 0;
}
set_float_handler (buf);
(*fn)(data);
set_float_handler (NULL);
return 1;
}
/* Specify, in HANDLER, where to longjmp to when a floating arithmetic
error happens, pushing the previous specification into OLD_HANDLER.
Return an indication of whether there was a previous handler in effect. */
int
push_float_handler (handler, old_handler)
jmp_buf handler, old_handler;
{
int was_handled = float_handled;
float_handled = 1;
if (was_handled)
memcpy ((char *) old_handler, (char *) float_handler,
sizeof (float_handler));
memcpy ((char *) float_handler, (char *) handler, sizeof (float_handler));
return was_handled;
}
/* Restore the previous specification of whether and where to longjmp to
when a floating arithmetic error happens. */
void
pop_float_handler (handled, handler)
int handled;
jmp_buf handler;
{
float_handled = handled;
if (handled)
bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
}
/* Handler for SIGPIPE. */
static void
pipe_closed (signo)
/* If this is missing, some compilers complain. */
int signo ATTRIBUTE_UNUSED;
{
fatal ("output pipe has been closed");
}
/* Strip off a legitimate source ending from the input string NAME of
length LEN. Rather than having to know the names used by all of
our front ends, we strip off an ending of a period followed by
up to five characters. (Java uses ".class".) */
void
strip_off_ending (name, len)
char *name;
int len;
{
int i;
for (i = 2; i < 6 && len > i; i++)
{
if (name[len - i] == '.')
{
name[len - i] = '\0';
break;
}
}
}
/* Output a quoted string. */
void
output_quoted_string (asm_file, string)
FILE *asm_file;
const char *string;
{
#ifdef OUTPUT_QUOTED_STRING
OUTPUT_QUOTED_STRING (asm_file, string);
#else
char c;
putc ('\"', asm_file);
while ((c = *string++) != 0)
{
if (c == '\"' || c == '\\')
putc ('\\', asm_file);
putc (c, asm_file);
}
putc ('\"', asm_file);
#endif
}
/* Output a file name in the form wanted by System V. */
void
output_file_directive (asm_file, input_name)
FILE *asm_file;
const char *input_name;
{
int len = strlen (input_name);
const char *na = input_name + len;
/* NA gets INPUT_NAME sans directory names. */
while (na > input_name)
{
if (na[-1] == '/')
break;
#ifdef DIR_SEPARATOR
if (na[-1] == DIR_SEPARATOR)
break;
#endif
na--;
}
#ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
#else
#ifdef ASM_OUTPUT_SOURCE_FILENAME
ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
#else
fprintf (asm_file, "\t.file\t");
output_quoted_string (asm_file, na);
fputc ('\n', asm_file);
#endif
#endif
}
#ifdef ASM_IDENTIFY_LANGUAGE
/* Routine to build language identifier for object file. */
static void
output_lang_identify (asm_out_file)
FILE *asm_out_file;
{
int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
char *s = (char *) alloca (len);
sprintf (s, "__gnu_compiled_%s", lang_identify ());
ASM_OUTPUT_LABEL (asm_out_file, s);
}
#endif
/* Routine to open a dump file. */
static void
open_dump_file (suffix, function_name)
const char *suffix;
const char *function_name;
{
char *dumpname;
TIMEVAR
(dump_time,
{
dumpname = concat (dump_base_name, suffix, NULL);
if (rtl_dump_file != NULL)
fclose (rtl_dump_file);
rtl_dump_file = fopen (dumpname, "a");
if (rtl_dump_file == NULL)
pfatal_with_name (dumpname);
free (dumpname);
if (function_name)
fprintf (rtl_dump_file, "\n;; Function %s\n\n", function_name);
});
return;
}
/* Routine to close a dump file. */
static void
close_dump_file (func, insns)
void (*func) PROTO ((FILE *, rtx));
rtx insns;
{
TIMEVAR
(dump_time,
{
if (func)
func (rtl_dump_file, insns);
fflush (rtl_dump_file);
fclose (rtl_dump_file);
rtl_dump_file = NULL;
});
return;
}
/* Routine to dump rtl into a file. */
static void
dump_rtl (suffix, decl, func, insns)
const char *suffix;
tree decl;
void (*func) PROTO ((FILE *, rtx));
rtx insns;
{
open_dump_file (suffix, decl_printable_name (decl, 2));
close_dump_file (func, insns);
}
/* Routine to empty a dump file. */
static void
clean_dump_file (suffix)
const char *suffix;
{
char * const dumpname = concat (dump_base_name, suffix, NULL);
rtl_dump_file = fopen (dumpname, "w");
if (rtl_dump_file == NULL)
pfatal_with_name (dumpname);
free (dumpname);
fclose (rtl_dump_file);
rtl_dump_file = NULL;
return;
}
/* Do any final processing required for the declarations in VEC, of
which there are LEN. We write out inline functions and variables
that have been deferred until this point, but which are required.
Returns non-zero if anything was put out. */
int
wrapup_global_declarations (vec, len)
tree *vec;
int len;
{
tree decl;
int i;
int reconsider;
int output_something = 0;
for (i = 0; i < len; i++)
{
decl = vec[i];
/* We're not deferring this any longer. */
DECL_DEFER_OUTPUT (decl) = 0;
if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
&& incomplete_decl_finalize_hook != 0)
(*incomplete_decl_finalize_hook) (decl);
}
/* Now emit any global variables or functions that we have been
putting off. We need to loop in case one of the things emitted
here references another one which comes earlier in the list. */
do
{
reconsider = 0;
for (i = 0; i < len; i++)
{
decl = vec[i];
if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
continue;
/* Don't write out static consts, unless we still need them.
We also keep static consts if not optimizing (for debugging),
unless the user specified -fno-keep-static-consts.
??? They might be better written into the debug information.
This is possible when using DWARF.
A language processor that wants static constants to be always
written out (even if it is not used) is responsible for
calling rest_of_decl_compilation itself. E.g. the C front-end
calls rest_of_decl_compilation from finish_decl.
One motivation for this is that is conventional in some
environments to write things like:
static const char rcsid[] = "... version string ...";
intending to force the string to be in the executable.
A language processor that would prefer to have unneeded
static constants "optimized away" would just defer writing
them out until here. E.g. C++ does this, because static
constants are often defined in header files.
??? A tempting alternative (for both C and C++) would be
to force a constant to be written if and only if it is
defined in a main file, as opposed to an include file. */
if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
&& (! TREE_READONLY (decl)
|| TREE_PUBLIC (decl)
|| (!optimize && flag_keep_static_consts)
|| TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
{
reconsider = 1;
rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
}
if (TREE_CODE (decl) == FUNCTION_DECL
&& DECL_INITIAL (decl) != 0
&& DECL_SAVED_INSNS (decl) != 0
&& (flag_keep_inline_functions
|| (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
|| TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
{
reconsider = 1;
temporary_allocation ();
output_inline_function (decl);
permanent_allocation (1);
}
}
if (reconsider)
output_something = 1;
}
while (reconsider);
return output_something;
}
/* Issue appropriate warnings for the global declarations in VEC (of
which there are LEN). Output debugging information for them. */
void
check_global_declarations (vec, len)
tree *vec;
int len;
{
tree decl;
int i;
for (i = 0; i < len; i++)
{
decl = vec[i];
if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
&& ! TREE_ASM_WRITTEN (decl))
/* Cancel the RTL for this decl so that, if debugging info
output for global variables is still to come,
this one will be omitted. */
DECL_RTL (decl) = NULL;
/* Warn about any function
declared static but not defined.
We don't warn about variables,
because many programs have static variables
that exist only to get some text into the object file. */
if (TREE_CODE (decl) == FUNCTION_DECL
&& (warn_unused
|| TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
&& DECL_INITIAL (decl) == 0
&& DECL_EXTERNAL (decl)
&& ! DECL_ARTIFICIAL (decl)
&& ! TREE_PUBLIC (decl))
{
if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
pedwarn_with_decl (decl,
"`%s' used but never defined");
else
warning_with_decl (decl,
"`%s' declared `static' but never defined");
/* This symbol is effectively an "extern" declaration now. */
TREE_PUBLIC (decl) = 1;
assemble_external (decl);
}
/* Warn about static fns or vars defined but not used,
but not about inline functions or static consts
since defining those in header files is normal practice. */
if (warn_unused
&& ((TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
|| (TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
&& ! DECL_IN_SYSTEM_HEADER (decl)
&& ! DECL_EXTERNAL (decl)
&& ! TREE_PUBLIC (decl)
&& ! TREE_USED (decl)
&& (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
/* The TREE_USED bit for file-scope decls
is kept in the identifier, to handle multiple
external decls in different scopes. */
&& ! TREE_USED (DECL_NAME (decl)))
warning_with_decl (decl, "`%s' defined but not used");
#ifdef SDB_DEBUGGING_INFO
/* The COFF linker can move initialized global vars to the end.
And that can screw up the symbol ordering.
By putting the symbols in that order to begin with,
we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
&& TREE_PUBLIC (decl) && DECL_INITIAL (decl)
&& ! DECL_EXTERNAL (decl)
&& DECL_RTL (decl) != 0)
TIMEVAR (symout_time, sdbout_symbol (decl, 0));
/* Output COFF information for non-global
file-scope initialized variables. */
if (write_symbols == SDB_DEBUG
&& TREE_CODE (decl) == VAR_DECL
&& DECL_INITIAL (decl)
&& ! DECL_EXTERNAL (decl)
&& DECL_RTL (decl) != 0
&& GET_CODE (DECL_RTL (decl)) == MEM)
TIMEVAR (symout_time, sdbout_toplevel_data (decl));
#endif /* SDB_DEBUGGING_INFO */
#ifdef DWARF_DEBUGGING_INFO
/* Output DWARF information for file-scope tentative data object
declarations, file-scope (extern) function declarations (which
had no corresponding body) and file-scope tagged type declarations
and definitions which have not yet been forced out. */
if (write_symbols == DWARF_DEBUG
&& (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
#endif
#ifdef DWARF2_DEBUGGING_INFO
/* Output DWARF2 information for file-scope tentative data object
declarations, file-scope (extern) function declarations (which
had no corresponding body) and file-scope tagged type declarations
and definitions which have not yet been forced out. */
if (write_symbols == DWARF2_DEBUG
&& (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
TIMEVAR (symout_time, dwarf2out_decl (decl));
#endif
}
}
/* Compile an entire file of output from cpp, named NAME.
Write a file of assembly output and various debugging dumps. */
static void
compile_file (name)
char *name;
{
tree globals;
int start_time;
int name_specified = name != 0;
if (dump_base_name == 0)
dump_base_name = name ? name : "gccdump";
parse_time = 0;
varconst_time = 0;
integration_time = 0;
jump_time = 0;
cse_time = 0;
gcse_time = 0;
loop_time = 0;
cse2_time = 0;
branch_prob_time = 0;
flow_time = 0;
combine_time = 0;
regmove_time = 0;
sched_time = 0;
local_alloc_time = 0;
global_alloc_time = 0;
flow2_time = 0;
peephole2_time = 0;
sched2_time = 0;
dbr_sched_time = 0;
shorten_branch_time = 0;
stack_reg_time = 0;
final_time = 0;
symout_time = 0;
dump_time = 0;
/* Initialize data in various passes. */
init_obstacks ();
init_tree_codes ();
name = init_parse (name);
init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
|| debug_info_level == DINFO_LEVEL_VERBOSE
|| flag_test_coverage
|| warn_notreached);
init_regs ();
init_decl_processing ();
init_optabs ();
init_stmt ();
init_eh ();
init_loop ();
init_reload ();
init_alias_once ();
init_function_once ();
init_stor_layout_once ();
init_varasm_once ();
/* The following initialization functions need to generate rtl, so
provide a dummy function context for them. */
init_dummy_function_start ();
init_expmed ();
init_expr_once ();
if (flag_caller_saves)
init_caller_save ();
expand_dummy_function_end ();
/* If auxiliary info generation is desired, open the output file.
This goes in the same directory as the source file--unlike
all the other output files. */
if (flag_gen_aux_info)
{
aux_info_file = fopen (aux_info_file_name, "w");
if (aux_info_file == 0)
pfatal_with_name (aux_info_file_name);
}
/* Clear the dump files. */
if (rtl_dump)
clean_dump_file (".00.rtl");
if (jump_opt_dump)
{
clean_dump_file (".01.jump");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".01.jump");
}
if (cse_dump)
{
clean_dump_file (".02.cse");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".02.cse");
}
if (addressof_dump)
{
clean_dump_file (".03.addressof");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".03.addressof");
}
if (gcse_dump)
{
clean_dump_file (".04.gcse");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".04.gcse");
}
if (loop_dump)
{
clean_dump_file (".05.loop");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".05.loop");
}
if (cse2_dump)
{
clean_dump_file (".06.cse2");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".06.cse2");
}
if (branch_prob_dump)
{
clean_dump_file (".07.bp");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".07.bp");
}
if (flow_dump)
{
clean_dump_file (".08.flow");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".08.flow");
}
if (combine_dump)
{
clean_dump_file (".09.combine");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".09.combine");
}
if (regmove_dump)
{
clean_dump_file (".10.regmove");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".10.regmove");
}
#ifdef INSN_SCHEDULING
if (sched_dump)
{
clean_dump_file (".11.sched");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".11.sched");
}
#endif
if (local_reg_dump)
{
clean_dump_file (".12.lreg");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".12.lreg");
}
if (global_reg_dump)
{
clean_dump_file (".13.greg");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".13.greg");
}
if (flow2_dump)
{
clean_dump_file (".14.flow2");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".14.flow2");
}
#ifdef HAVE_peephole2
if (peephole2_dump)
{
clean_dump_file (".15.peephole2");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".15.peephole2");
}
#endif
#ifdef INSN_SCHEDULING
if (sched2_dump)
{
clean_dump_file (".16.sched2");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".16.sched2");
}
#endif
if (jump2_opt_dump)
{
clean_dump_file (".17.jump2");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".17.jump2");
}
#ifdef MACHINE_DEPENDENT_REORG
if (mach_dep_reorg_dump)
{
clean_dump_file (".18.mach");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".18.mach");
}
#endif
#ifdef DELAY_SLOTS
if (dbr_sched_dump)
{
clean_dump_file (".19.dbr");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".19.dbr");
}
#endif
#ifdef STACK_REGS
if (stack_reg_dump)
{
clean_dump_file (".20.stack");
if (graph_dump_format != no_graph)
clean_graph_dump_file (dump_base_name, ".20.stack");
}
#endif
/* Open assembler code output file. */
if (flag_syntax_only)
asm_out_file = NULL;
else
{
if (! name_specified && asm_file_name == 0)
asm_out_file = stdout;
else
{
if (asm_file_name == 0)
{
int len = strlen (dump_base_name);
char *dumpname = (char *) xmalloc (len + 6);
memcpy (dumpname, dump_base_name, len + 1);
strip_off_ending (dumpname, len);
strcat (dumpname, ".s");
asm_file_name = dumpname;
}
if (!strcmp (asm_file_name, "-"))
asm_out_file = stdout;
else
asm_out_file = fopen (asm_file_name, "w");
if (asm_out_file == 0)
pfatal_with_name (asm_file_name);
}
#ifdef IO_BUFFER_SIZE
setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
_IOFBF, IO_BUFFER_SIZE);
#endif
}
if (ggc_p)
name = ggc_alloc_string (name, strlen (name));
input_filename = name;
/* Put an entry on the input file stack for the main input file. */
input_file_stack
= (struct file_stack *) xmalloc (sizeof (struct file_stack));
input_file_stack->next = 0;
input_file_stack->name = input_filename;
/* Perform language-specific initialization.
This may set main_input_filename. */
lang_init ();
/* If the input doesn't start with a #line, use the input name
as the official input file name. */
if (main_input_filename == 0)
main_input_filename = name;
if (flag_syntax_only)
{
write_symbols = NO_DEBUG;
profile_flag = 0;
profile_block_flag = 0;
}
else
{
ASM_FILE_START (asm_out_file);
#ifdef ASM_COMMENT_START
if (flag_verbose_asm)
{
/* Print the list of options in effect. */
print_version (asm_out_file, ASM_COMMENT_START);
print_switch_values (asm_out_file, 0, MAX_LINE,
ASM_COMMENT_START, " ", "\n");
/* Add a blank line here so it appears in assembler output but not
screen output. */
fprintf (asm_out_file, "\n");
}
#endif
/* Output something to inform GDB that this compilation was by GCC. */
#ifndef ASM_IDENTIFY_GCC
fprintf (asm_out_file, "gcc2_compiled.:\n");
#else
ASM_IDENTIFY_GCC (asm_out_file);
#endif
/* Output something to identify which front-end produced this file. */
#ifdef ASM_IDENTIFY_LANGUAGE
ASM_IDENTIFY_LANGUAGE (asm_out_file);
#endif
} /* ! flag_syntax_only */
#ifndef ASM_OUTPUT_SECTION_NAME
if (flag_function_sections)
{
warning ("-ffunction-sections not supported for this target.");
flag_function_sections = 0;
}
if (flag_data_sections)
{
warning ("-fdata-sections not supported for this target.");
flag_data_sections = 0;
}
#endif
if (flag_function_sections
&& (profile_flag || profile_block_flag))
{
warning ("-ffunction-sections disabled; it makes profiling impossible.");
flag_function_sections = 0;
}
#ifndef OBJECT_FORMAT_ELF
if (flag_function_sections && write_symbols != NO_DEBUG)
warning ("-ffunction-sections may affect debugging on some targets.");
#endif
/* ??? Note: There used to be a conditional here
to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
This was to guarantee separation between gcc_compiled. and
the first function, for the sake of dbx on Suns.
However, having the extra zero here confused the Emacs
code for unexec, and might confuse other programs too.
Therefore, I took out that change.
In future versions we should find another way to solve
that dbx problem. -- rms, 23 May 93. */
/* Don't let the first function fall at the same address
as gcc_compiled., if profiling. */
if (profile_flag || profile_block_flag)
{
/* It's best if we can write a nop here since some
assemblers don't tolerate zeros in the text section. */
output_asm_insn (get_insn_template (CODE_FOR_nop, NULL), NULL_PTR);
}
/* If dbx symbol table desired, initialize writing it
and output the predefined types. */
#if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
getdecls ()));
#endif
#ifdef SDB_DEBUGGING_INFO
if (write_symbols == SDB_DEBUG)
TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
getdecls ()));
#endif
#ifdef DWARF_DEBUGGING_INFO
if (write_symbols == DWARF_DEBUG)
TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
#endif
#ifdef DWARF2_UNWIND_INFO
if (dwarf2out_do_frame ())
dwarf2out_frame_init ();
#endif
#ifdef DWARF2_DEBUGGING_INFO
if (write_symbols == DWARF2_DEBUG)
TIMEVAR (symout_time, dwarf2out_init (asm_out_file, main_input_filename));
#endif
/* Initialize yet another pass. */
init_final (main_input_filename);
init_branch_prob (dump_base_name);
start_time = get_run_time ();
/* Call the parser, which parses the entire file
(calling rest_of_compilation for each function). */
if (yyparse () != 0)
{
if (errorcount == 0)
fnotice (stderr, "Errors detected in input file (your bison.simple is out of date)\n");
/* In case there were missing closebraces,
get us back to the global binding level. */
while (! global_bindings_p ())
poplevel (0, 0, 0);
}
/* Compilation is now finished except for writing
what's left of the symbol table output. */
parse_time += get_run_time () - start_time;
parse_time -= integration_time;
parse_time -= varconst_time;
if (flag_syntax_only)
goto finish_syntax;
globals = getdecls ();
/* Really define vars that have had only a tentative definition.
Really output inline functions that must actually be callable
and have not been output so far. */
{
int len = list_length (globals);
tree *vec = (tree *) xmalloc (sizeof (tree) * len);
int i;
tree decl;
/* Process the decls in reverse order--earliest first.
Put them into VEC from back to front, then take out from front. */
for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
vec[len - i - 1] = decl;
wrapup_global_declarations (vec, len);
/* This must occur after the loop to output deferred functions. Else
the profiler initializer would not be emitted if all the functions
in this compilation unit were deferred.
output_func_start_profiler can not cause any additional functions or
data to need to be output, so it need not be in the deferred function
loop above. */
output_func_start_profiler ();
/* Now that all possible functions have been output, we can dump
the exception table. */
output_exception_table ();
check_global_declarations (vec, len);
/* Clean up. */
free (vec);
}
/* Write out any pending weak symbol declarations. */
weak_finish ();
/* Do dbx symbols */
#if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
TIMEVAR (symout_time,
{
dbxout_finish (asm_out_file, main_input_filename);
});
#endif
#ifdef DWARF_DEBUGGING_INFO
if (write_symbols == DWARF_DEBUG)
TIMEVAR (symout_time,
{
dwarfout_finish ();
});
#endif
#ifdef DWARF2_UNWIND_INFO
if (dwarf2out_do_frame ())
dwarf2out_frame_finish ();
#endif
#ifdef DWARF2_DEBUGGING_INFO
if (write_symbols == DWARF2_DEBUG)
TIMEVAR (symout_time,
{
dwarf2out_finish ();
});
#endif
/* Output some stuff at end of file if nec. */
end_final (dump_base_name);
if (branch_prob_dump)
open_dump_file (".07.bp", NULL);
TIMEVAR (dump_time, end_branch_prob (rtl_dump_file));
if (branch_prob_dump)
close_dump_file (NULL, NULL_RTX);
#ifdef ASM_FILE_END
ASM_FILE_END (asm_out_file);
#endif
/* Language-specific end of compilation actions. */
finish_syntax:
lang_finish ();
/* Close the dump files. */
if (flag_gen_aux_info)
{
fclose (aux_info_file);
if (errorcount)
unlink (aux_info_file_name);
}
if (combine_dump)
{
open_dump_file (".09.combine", NULL);
TIMEVAR (dump_time, dump_combine_total_stats (rtl_dump_file));
close_dump_file (NULL, NULL_RTX);
}
/* Close non-debugging input and output files. Take special care to note
whether fclose returns an error, since the pages might still be on the
buffer chain while the file is open. */
finish_parse ();
if (! flag_syntax_only
&& (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0))
fatal_io_error (asm_file_name);
/* Do whatever is necessary to finish printing the graphs. */
if (graph_dump_format != no_graph)
{
if (jump_opt_dump)
finish_graph_dump_file (dump_base_name, ".01.jump");
if (cse_dump)
finish_graph_dump_file (dump_base_name, ".02.cse");
if (addressof_dump)
finish_graph_dump_file (dump_base_name, ".03.addressof");
if (gcse_dump)
finish_graph_dump_file (dump_base_name, ".04.gcse");
if (loop_dump)
finish_graph_dump_file (dump_base_name, ".05.loop");
if (cse2_dump)
finish_graph_dump_file (dump_base_name, ".06.cse2");
if (branch_prob_dump)
finish_graph_dump_file (dump_base_name, ".07.bp");
if (flow_dump)
finish_graph_dump_file (dump_base_name, ".08.flow");
if (combine_dump)
finish_graph_dump_file (dump_base_name, ".09.combine");
if (regmove_dump)
finish_graph_dump_file (dump_base_name, ".10.regmove");
#ifdef INSN_SCHEDULING
if (sched_dump)
finish_graph_dump_file (dump_base_name, ".11.sched");
#endif
if (local_reg_dump)
finish_graph_dump_file (dump_base_name, ".12.lreg");
if (global_reg_dump)
finish_graph_dump_file (dump_base_name, ".13.greg");
if (flow2_dump)
finish_graph_dump_file (dump_base_name, ".14.flow2");
#ifdef HAVE_peephole2
if (flow2_dump)
finish_graph_dump_file (dump_base_name, ".15.peephole2");
#endif
#ifdef INSN_SCHEDULING
if (sched2_dump)
finish_graph_dump_file (dump_base_name, ".16.sched2");
#endif
if (jump2_opt_dump)
finish_graph_dump_file (dump_base_name, ".17.jump2");
#ifdef MACHINE_DEPENDENT_REORG
if (mach_dep_reorg_dump)
finish_graph_dump_file (dump_base_name, ".18.mach");
#endif
#ifdef DELAY_SLOTS
if (dbr_sched_dump)
finish_graph_dump_file (dump_base_name, ".19.dbr");
#endif
#ifdef STACK_REGS
if (stack_reg_dump)
finish_graph_dump_file (dump_base_name, ".20.stack");
#endif
}
/* Free up memory for the benefit of leak detectors. */
free_reg_info ();
/* Print the times. */
if (! quiet_flag)
{
all_time = get_run_time ();
fprintf (stderr,"\n");
print_time ("parse", parse_time);
print_time ("integration", integration_time);
print_time ("jump", jump_time);
print_time ("cse", cse_time);
print_time ("gcse", gcse_time);
print_time ("loop", loop_time);
print_time ("cse2", cse2_time);
print_time ("branch-prob", branch_prob_time);
print_time ("flow", flow_time);
print_time ("combine", combine_time);
print_time ("regmove", regmove_time);
#ifdef INSN_SCHEDULING
print_time ("sched", sched_time);
#endif
print_time ("local-alloc", local_alloc_time);
print_time ("global-alloc", global_alloc_time);
print_time ("flow2", flow2_time);
#ifdef HAVE_peephole2
print_time ("peephole2", peephole2_time);
#endif
#ifdef INSN_SCHEDULING
print_time ("sched2", sched2_time);
#endif
#ifdef DELAY_SLOTS
print_time ("dbranch", dbr_sched_time);
#endif
print_time ("shorten-branch", shorten_branch_time);
#ifdef STACK_REGS
print_time ("stack-reg", stack_reg_time);
#endif
print_time ("final", final_time);
print_time ("varconst", varconst_time);
print_time ("symout", symout_time);
print_time ("dump", dump_time);
if (ggc_p)
print_time ("gc", gc_time);
}
}
/* This is called from various places for FUNCTION_DECL, VAR_DECL,
and TYPE_DECL nodes.
This does nothing for local (non-static) variables, unless the
variable is a register variable with an ASMSPEC. In that case, or
if the variable is not an automatice, it sets up the RTL and
outputs any assembler code (label definition, storage allocation
and initialization).
DECL is the declaration. If ASMSPEC is nonzero, it specifies
the assembler symbol name to be used. TOP_LEVEL is nonzero
if this declaration is not within a function. */
void
rest_of_decl_compilation (decl, asmspec, top_level, at_end)
tree decl;
const char *asmspec;
int top_level;
int at_end;
{
/* Declarations of variables, and of functions defined elsewhere. */
/* The most obvious approach, to put an #ifndef around where
this macro is used, doesn't work since it's inside a macro call. */
#ifndef ASM_FINISH_DECLARE_OBJECT
#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
#endif
/* Forward declarations for nested functions are not "external",
but we need to treat them as if they were. */
if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
|| TREE_CODE (decl) == FUNCTION_DECL)
TIMEVAR (varconst_time,
{
make_decl_rtl (decl, asmspec, top_level);
/* Initialized extern variable exists to be replaced
with its value, or represents something that will be
output in another file. */
if (! (TREE_CODE (decl) == VAR_DECL
&& DECL_EXTERNAL (decl) && TREE_READONLY (decl)
&& DECL_INITIAL (decl) != 0
&& DECL_INITIAL (decl) != error_mark_node))
/* Don't output anything
when a tentative file-scope definition is seen.
But at end of compilation, do output code for them. */
if (! (! at_end && top_level
&& (DECL_INITIAL (decl) == 0
|| DECL_INITIAL (decl) == error_mark_node)))
assemble_variable (decl, top_level, at_end, 0);
if (decl == last_assemble_variable_decl)
{
ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
top_level, at_end);
}
});
else if (DECL_REGISTER (decl) && asmspec != 0)
{
if (decode_reg_name (asmspec) >= 0)
{
DECL_RTL (decl) = 0;
make_decl_rtl (decl, asmspec, top_level);
}
else
error ("invalid register name `%s' for register variable", asmspec);
}
#if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
&& TREE_CODE (decl) == TYPE_DECL)
TIMEVAR (symout_time, dbxout_symbol (decl, 0));
#endif
#ifdef SDB_DEBUGGING_INFO
else if (write_symbols == SDB_DEBUG && top_level
&& TREE_CODE (decl) == TYPE_DECL)
TIMEVAR (symout_time, sdbout_symbol (decl, 0));
#endif
}
/* Called after finishing a record, union or enumeral type. */
void
rest_of_type_compilation (type, toplev)
#if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
tree type;
int toplev;
#else
tree type ATTRIBUTE_UNUSED;
int toplev ATTRIBUTE_UNUSED;
#endif
{
#if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
#endif
#ifdef SDB_DEBUGGING_INFO
if (write_symbols == SDB_DEBUG)
TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
#endif
}
/* This is called from finish_function (within yyparse)
after each top-level definition is parsed.
It is supposed to compile that function or variable
and output the assembler code for it.
After we return, the tree storage is freed. */
void
rest_of_compilation (decl)
tree decl;
{
register rtx insns;
int start_time = get_run_time ();
int tem;
int failure = 0;
int rebuild_label_notes_after_reload;
/* First, remove any notes we don't need. That will make iterating
over the instruction sequence faster, and allow the garbage
collector to reclaim the memory used by the notes. */
remove_unncessary_notes ();
/* In function-at-a-time mode, we do not attempt to keep the BLOCK
tree in sensible shape. So, we just recalculate it here. */
if (cfun->x_whole_function_mode_p)
{
find_loop_tree_blocks ();
unroll_block_trees ();
}
/* If we are reconsidering an inline function
at the end of compilation, skip the stuff for making it inline. */
if (DECL_SAVED_INSNS (decl) == 0)
{
int inlinable = 0;
tree parent;
const char *lose;
/* If this is nested inside an inlined external function, pretend
it was only declared. Since we cannot inline such functions,
generating code for this one is not only not necessary but will
confuse some debugging output writers. */
for (parent = DECL_CONTEXT (current_function_decl);
parent != NULL_TREE;
parent = get_containing_scope (parent))
if (TREE_CODE (parent) == FUNCTION_DECL
&& DECL_INLINE (parent) && DECL_EXTERNAL (parent))
{
DECL_INITIAL (decl) = 0;
goto exit_rest_of_compilation;
}
/* If requested, consider whether to make this function inline. */
if (DECL_INLINE (decl) || flag_inline_functions)
TIMEVAR (integration_time,
{
lose = function_cannot_inline_p (decl);
if (lose || ! optimize)
{
if (warn_inline && DECL_INLINE (decl))
warning_with_decl (decl, lose);
DECL_ABSTRACT_ORIGIN (decl) = 0;
/* Don't really compile an extern inline function.
If we can't make it inline, pretend
it was only declared. */
if (DECL_EXTERNAL (decl))
{
DECL_INITIAL (decl) = 0;
goto exit_rest_of_compilation;
}
}
else
/* ??? Note that this has the effect of making it look
like "inline" was specified for a function if we choose
to inline it. This isn't quite right, but it's
probably not worth the trouble to fix. */
inlinable = DECL_INLINE (decl) = 1;
});
insns = get_insns ();
/* Dump the rtl code if we are dumping rtl. */
if (rtl_dump)
{
open_dump_file (".00.rtl", decl_printable_name (decl, 2));
if (DECL_SAVED_INSNS (decl))
fprintf (rtl_dump_file, ";; (integrable)\n\n");
close_dump_file (print_rtl, insns);
}
/* If function is inline, and we don't yet know whether to
compile it by itself, defer decision till end of compilation.
finish_compilation will call rest_of_compilation again
for those functions that need to be output. Also defer those
functions that we are supposed to defer. */
if (inlinable)
DECL_DEFER_OUTPUT (decl) = 1;
if (DECL_DEFER_OUTPUT (decl)
|| (DECL_INLINE (decl)
&& ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
&& ! flag_keep_inline_functions)
|| DECL_EXTERNAL (decl))))
{
DECL_DEFER_OUTPUT (decl) = 1;
/* If -Wreturn-type, we have to do a bit of compilation.
However, if we just fall through we will call
save_for_inline_copying() which results in excessive
memory use. Instead, we just want to call
jump_optimize() to figure out whether or not we can fall
off the end of the function; we do the minimum amount of
work necessary to make that safe. And, we set optimize
to zero to keep jump_optimize from working too hard. */
if (warn_return_type)
{
int saved_optimize = optimize;
optimize = 0;
find_exception_handler_labels ();
jump_optimize (get_insns(), !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
!JUMP_AFTER_REGSCAN);
optimize = saved_optimize;
}
#ifdef DWARF_DEBUGGING_INFO
/* Generate the DWARF info for the "abstract" instance
of a function which we may later generate inlined and/or
out-of-line instances of. */
if (write_symbols == DWARF_DEBUG)
{
set_decl_abstract_flags (decl, 1);
TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
set_decl_abstract_flags (decl, 0);
}
#endif
TIMEVAR (integration_time, save_for_inline_nocopy (decl));
DECL_SAVED_INSNS (decl)->inlinable = inlinable;
goto exit_rest_of_compilation;
}
/* If specified extern inline but we aren't inlining it, we are
done. This goes for anything that gets here with DECL_EXTERNAL
set, not just things with DECL_INLINE. */
if (DECL_EXTERNAL (decl))
goto exit_rest_of_compilation;
}
/* Initialize some variables used by the optimizers. */
init_function_for_compilation ();
if (! DECL_DEFER_OUTPUT (decl))
TREE_ASM_WRITTEN (decl) = 1;
/* Now that integrate will no longer see our rtl, we need not distinguish
between the return value of this function and the return value of called
functions. */
rtx_equal_function_value_matters = 0;
/* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
{
goto exit_rest_of_compilation;
}
/* Emit code to get eh context, if needed. */
emit_eh_context ();
#ifdef FINALIZE_PIC
/* If we are doing position-independent code generation, now
is the time to output special prologues and epilogues.
We do not want to do this earlier, because it just clutters
up inline functions with meaningless insns. */
if (flag_pic)
FINALIZE_PIC;
#endif
/* From now on, allocate rtl in current_obstack, not in saveable_obstack.
Note that that may have been done above, in save_for_inline_copying.
The call to resume_temporary_allocation near the end of this function
goes back to the usual state of affairs. This must be done after
we've built up any unwinders for exception handling, and done
the FINALIZE_PIC work, if necessary. */
rtl_in_current_obstack ();
insns = get_insns ();
/* Copy any shared structure that should not be shared. */
unshare_all_rtl (insns);
init_EXPR_INSN_LIST_cache ();
#ifdef SETJMP_VIA_SAVE_AREA
/* This must be performed before virutal register instantiation. */
if (current_function_calls_alloca)
optimize_save_area_alloca (insns);
#endif
/* Instantiate all virtual registers. */
instantiate_virtual_regs (current_function_decl, get_insns ());
/* See if we have allocated stack slots that are not directly addressable.
If so, scan all the insns and create explicit address computation
for all references to such slots. */
/* fixup_stack_slots (); */
/* Find all the EH handlers. */
find_exception_handler_labels ();
if (jump_opt_dump)
open_dump_file (".01.jump", decl_printable_name (decl, 2));
/* Always do one jump optimization pass to ensure that JUMP_LABEL fields
are initialized and to compute whether control can drop off the end
of the function. */
TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
JUMP_AFTER_REGSCAN));
/* Jump optimization, and the removal of NULL pointer checks, may
have reduced the number of instructions substantially. CSE, and
future passes, allocate arrays whose dimensions involve the maximum
instruction UID, so if we can reduce the maximum UID we'll save big on
memory. */
renumber_insns (rtl_dump_file);
/* Dump rtl code after jump, if we are doing that. */
if (jump_opt_dump)
close_dump_file (print_rtl, insns);
/* Now is when we stop if -fsyntax-only and -Wreturn-type. */
if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
goto exit_rest_of_compilation;
/* Try to identify useless null pointer tests and delete them. */
if (flag_delete_null_pointer_checks)
TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
if (ggc_p)
ggc_collect ();
/* Perform common subexpression elimination.
Nonzero value from `cse_main' means that jumps were simplified
and some code may now be unreachable, so do
jump optimization again. */
if (optimize > 0)
{
if (cse_dump)
open_dump_file (".02.cse", decl_printable_name (decl, 2));
TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
if (flag_thread_jumps)
TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 1));
TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
0, rtl_dump_file));
/* If we are not running the second CSE pass, then we are no longer
expecting CSE to be run. */
cse_not_expected = !flag_rerun_cse_after_loop;
if (tem || optimize > 1)
TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
!JUMP_NOOP_MOVES,
!JUMP_AFTER_REGSCAN));
/* Run this after jump optmizations remove all the unreachable code
so that unreachable code will not keep values live. */
TIMEVAR (cse_time, delete_trivially_dead_insns (insns, max_reg_num ()));
/* Try to identify useless null pointer tests and delete them. */
if (flag_delete_null_pointer_checks)
TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
/* The second pass of jump optimization is likely to have
removed a bunch more instructions. */
renumber_insns (rtl_dump_file);
/* Dump rtl code after cse, if we are doing that. */
if (cse_dump)
{
close_dump_file (print_rtl, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".02.cse", insns);
}
}
purge_addressof (insns);
reg_scan (insns, max_reg_num (), 1);
if (addressof_dump)
{
dump_rtl (".03.addressof", decl, print_rtl, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".03.addressof", insns);
}
if (ggc_p)
ggc_collect ();
/* Perform global cse. */
if (optimize > 0 && flag_gcse)
{
if (gcse_dump)
open_dump_file (".04.gcse", decl_printable_name (decl, 2));
TIMEVAR (gcse_time, tem = gcse_main (insns, rtl_dump_file));
/* If gcse altered any jumps, rerun jump optimizations to clean
things up. */
if (tem)
{
TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
!JUMP_NOOP_MOVES,
!JUMP_AFTER_REGSCAN));
}
if (gcse_dump)
{
close_dump_file (print_rtl, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".04.gcse", insns);
}
if (ggc_p)
ggc_collect ();
}
/* Move constant computations out of loops. */
if (optimize > 0)
{
if (loop_dump)
open_dump_file (".05.loop", decl_printable_name (decl, 2));
TIMEVAR
(loop_time,
{
if (flag_rerun_loop_opt)
{
/* We only want to perform unrolling once. */
loop_optimize (insns, rtl_dump_file, 0, 0);
/* The first call to loop_optimize makes some instructions
trivially dead. We delete those instructions now in the
hope that doing so will make the heuristics in loop work
better and possibly speed up compilation. */
delete_trivially_dead_insns (insns, max_reg_num ());
/* The regscan pass is currently necessary as the alias
analysis code depends on this information. */
reg_scan (insns, max_reg_num (), 1);
}
loop_optimize (insns, rtl_dump_file, flag_unroll_loops, 1);
});
/* Dump rtl code after loop opt, if we are doing that. */
if (loop_dump)
{
close_dump_file (print_rtl, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".05.loop", insns);
}
if (ggc_p)
ggc_collect ();
}
/* ??? Well, nearly. If HAVE_conditional_arithmetic, jump_optimize
has put off all if-conversion until "after CSE". If we put this
off any longer we may miss out doing if-conversion entirely. */
cse_not_expected = 1;
if (optimize > 0)
{
if (cse2_dump)
open_dump_file (".06.cse2", decl_printable_name (decl, 2));
if (flag_rerun_cse_after_loop)
{
/* Running another jump optimization pass before the second
cse pass sometimes simplifies the RTL enough to allow
the second CSE pass to do a better job. Jump_optimize can change
max_reg_num so we must rerun reg_scan afterwards.
??? Rework to not call reg_scan so often. */
TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
!JUMP_NOOP_MOVES,
JUMP_AFTER_REGSCAN));
TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
1, rtl_dump_file));
if (tem)
TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
!JUMP_NOOP_MOVES,
!JUMP_AFTER_REGSCAN));
}
if (flag_thread_jumps)
{
/* This pass of jump threading straightens out code
that was kinked by loop optimization. */
TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
}
/* Dump rtl code after cse, if we are doing that. */
if (cse2_dump)
{
close_dump_file (print_rtl, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".06.cse2", insns);
}
if (ggc_p)
ggc_collect ();
}
if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
{
if (branch_prob_dump)
open_dump_file (".07.bp", decl_printable_name (decl, 2));
TIMEVAR
(branch_prob_time,
{
branch_prob (insns, rtl_dump_file);
});
if (branch_prob_dump)
{
close_dump_file (print_rtl, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".07.bp", insns);
}
if (ggc_p)
ggc_collect ();
}
/* Now we choose between stupid (pcc-like) register allocation
(if we got the -noreg switch and not -opt)
and smart register allocation. */
if (optimize > 0) /* Stupid allocation probably won't work */
obey_regdecls = 0; /* if optimizations being done. */
regclass_init ();
/* Print function header into flow dump now
because doing the flow analysis makes some of the dump. */
if (flow_dump)
open_dump_file (".08.flow", decl_printable_name (decl, 2));
if (obey_regdecls)
{
TIMEVAR (flow_time,
{
regclass (insns, max_reg_num (), NULL);
stupid_life_analysis (insns, max_reg_num (),
rtl_dump_file);
});
}
else
{
/* Do control and data flow analysis,
and write some of the results to dump file. */
TIMEVAR
(flow_time,
{
find_basic_blocks (insns, max_reg_num (), rtl_dump_file, 1);
calculate_loop_depth (rtl_dump_file);
life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
});
if (warn_uninitialized || extra_warnings)
{
uninitialized_vars_warning (DECL_INITIAL (decl));
if (extra_warnings)
setjmp_args_warning ();
}
}
/* Dump rtl after flow analysis. */
if (flow_dump)
{
close_dump_file (print_rtl_with_bb, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".08.flow", insns);
}
if (ggc_p)
ggc_collect ();
/* The first life analysis pass has finished. From now on we can not
generate any new pseudos. */
no_new_pseudos = 1;
/* If -opt, try combining insns through substitution. */
if (optimize > 0)
{
TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
/* Dump rtl code after insn combination. */
if (combine_dump)
{
dump_rtl (".09.combine", decl, print_rtl_with_bb, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".09.combine", insns);
}
if (ggc_p)
ggc_collect ();
}
/* Register allocation pre-pass, to reduce number of moves
necessary for two-address machines. */
if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
{
if (regmove_dump)
open_dump_file (".10.regmove", decl_printable_name (decl, 2));
TIMEVAR (regmove_time, regmove_optimize (insns, max_reg_num (),
rtl_dump_file));
if (regmove_dump)
{
close_dump_file (print_rtl_with_bb, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".10.regmove", insns);
}
if (ggc_p)
ggc_collect ();
}
/* Print function header into sched dump now
because doing the sched analysis makes some of the dump. */
#ifdef INSN_SCHEDULING
if (optimize > 0 && flag_schedule_insns)
{
if (sched_dump)
open_dump_file (".11.sched", decl_printable_name (decl, 2));
/* Do control and data sched analysis,
and write some of the results to dump file. */
TIMEVAR (sched_time, schedule_insns (rtl_dump_file));
/* Dump rtl after instruction scheduling. */
if (sched_dump)
{
close_dump_file (print_rtl_with_bb, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".11.sched", insns);
}
if (ggc_p)
ggc_collect ();
}
#endif
/* Determine if the current function is a leaf before running reload
since this can impact optimizations done by the prologue and
epilogue thus changing register elimination offsets. */
current_function_is_leaf = leaf_function_p ();
if (local_reg_dump)
open_dump_file (".12.lreg", decl_printable_name (decl, 2));
/* Unless we did stupid register allocation,
allocate pseudo-regs that are used only within 1 basic block.
RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
jump optimizer after register allocation and reloading are finished. */
if (!obey_regdecls)
TIMEVAR (local_alloc_time,
{
/* We recomputed reg usage as part of updating the rest
of life info during sched. */
if (! flag_schedule_insns)
recompute_reg_usage (insns, ! optimize_size);
regclass (insns, max_reg_num (), rtl_dump_file);
rebuild_label_notes_after_reload = local_alloc ();
});
else
rebuild_label_notes_after_reload = 0;
/* Dump rtl code after allocating regs within basic blocks. */
if (local_reg_dump)
{
TIMEVAR (dump_time, dump_flow_info (rtl_dump_file));
TIMEVAR (dump_time, dump_local_alloc (rtl_dump_file));
close_dump_file (print_rtl_with_bb, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".12.lreg", insns);
}
if (ggc_p)
ggc_collect ();
if (global_reg_dump)
open_dump_file (".13.greg", decl_printable_name (decl, 2));
/* Unless we did stupid register allocation,
allocate remaining pseudo-regs, then do the reload pass
fixing up any insns that are invalid. */
TIMEVAR (global_alloc_time,
{
if (!obey_regdecls)
failure = global_alloc (rtl_dump_file);
else
failure = reload (insns, 0, rtl_dump_file);
});
if (failure)
goto exit_rest_of_compilation;
if (ggc_p)
ggc_collect ();
/* Do a very simple CSE pass over just the hard registers. */
if (optimize > 0)
reload_cse_regs (insns);
/* Register allocation and reloading may have turned an indirect jump into
a direct jump. If so, we must rebuild the JUMP_LABEL fields of
jumping instructions. */
if (rebuild_label_notes_after_reload)
TIMEVAR (jump_time, rebuild_jump_labels (insns));
/* On some machines, the prologue and epilogue code, or parts thereof,
can be represented as RTL. Doing so lets us schedule insns between
it and the rest of the code and also allows delayed branch
scheduling to operate in the epilogue. */
thread_prologue_and_epilogue_insns (insns);
/* If optimizing and we are performing instruction scheduling after
reload, then go ahead and split insns now since we are about to
recompute flow information anyway.
reload_cse_regs may expose more splitting opportunities, expecially
for double-word operations. */
if (optimize > 0 && flag_schedule_insns_after_reload)
split_all_insns (0);
if (global_reg_dump)
{
TIMEVAR (dump_time, dump_global_regs (rtl_dump_file));
close_dump_file (print_rtl_with_bb, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".13.greg", insns);
}
/* Re-create the death notes which were deleted during reload. */
if (flow2_dump)
open_dump_file (".14.flow2", decl_printable_name (decl, 2));
if (optimize)
{
TIMEVAR
(flow2_time,
{
find_basic_blocks (insns, max_reg_num (), rtl_dump_file, 1);
life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
});
if (ggc_p)
ggc_collect ();
}
flow2_completed = 1;
if (flow2_dump)
{
close_dump_file (print_rtl_with_bb, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".14.flow2", insns);
}
#ifdef HAVE_peephole2
if (optimize > 0 && flag_peephole2)
{
if (peephole2_dump)
open_dump_file (".15.peephole2", decl_printable_name (decl, 2));
TIMEVAR (peephole2_time, peephole2_optimize (rtl_dump_file));
if (peephole2_dump)
{
close_dump_file (print_rtl_with_bb, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".15.peephole2", insns);
}
}
#endif
#ifdef INSN_SCHEDULING
if (optimize > 0 && flag_schedule_insns_after_reload)
{
if (sched2_dump)
open_dump_file (".16.sched2", decl_printable_name (decl, 2));
/* Do control and data sched analysis again,
and write some more of the results to dump file. */
TIMEVAR (sched2_time, schedule_insns (rtl_dump_file));
/* Dump rtl after post-reorder instruction scheduling. */
if (sched2_dump)
{
close_dump_file (print_rtl_with_bb, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".16.sched2", insns);
}
if (ggc_p)
ggc_collect ();
}
#endif
#ifdef LEAF_REGISTERS
current_function_uses_only_leaf_regs
= optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
#endif
/* One more attempt to remove jumps to .+1
left by dead-store-elimination.
Also do cross-jumping this time
and delete no-op move insns. */
if (optimize > 0)
{
TIMEVAR (jump_time, jump_optimize (insns, JUMP_CROSS_JUMP,
JUMP_NOOP_MOVES,
!JUMP_AFTER_REGSCAN));
/* Dump rtl code after jump, if we are doing that. */
if (jump2_opt_dump)
{
dump_rtl (".17.jump2", decl, print_rtl_with_bb, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".17.jump2", insns);
}
}
/* If a machine dependent reorganization is needed, call it. */
#ifdef MACHINE_DEPENDENT_REORG
if (mach_dep_reorg_dump)
open_dump_file (".18.mach", decl_printable_name (decl, 2));
MACHINE_DEPENDENT_REORG (insns);
if (mach_dep_reorg_dump)
{
close_dump_file (print_rtl_with_bb, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".18.mach", insns);
}
if (ggc_p)
ggc_collect ();
#endif
/* If a scheduling pass for delayed branches is to be done,
call the scheduling code. */
#ifdef DELAY_SLOTS
if (optimize > 0 && flag_delayed_branch)
{
if (dbr_sched_dump)
open_dump_file (".19.dbr", decl_printable_name (decl, 2));
TIMEVAR
(dbr_sched_time,
{
dbr_schedule (insns, rtl_dump_file);
});
if (dbr_sched_dump)
{
close_dump_file (print_rtl_with_bb, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".19.dbr", insns);
}
}
if (ggc_p)
ggc_collect ();
#endif
#ifdef STACK_REGS
if (stack_reg_dump)
open_dump_file (".20.stack", decl_printable_name (decl, 2));
TIMEVAR (stack_reg_time, reg_to_stack (insns, rtl_dump_file));
if (stack_reg_dump)
{
close_dump_file (print_rtl_with_bb, insns);
if (graph_dump_format != no_graph)
print_rtl_graph_with_bb (dump_base_name, ".20.stack", insns);
}
if (ggc_p)
ggc_collect ();
#endif
/* Shorten branches. */
TIMEVAR (shorten_branch_time,
{
shorten_branches (get_insns ());
});
/* Now turn the rtl into assembler code. */
TIMEVAR (final_time,
{
rtx x;
char *fnname;
/* Get the function's name, as described by its RTL.
This may be different from the DECL_NAME name used
in the source file. */
x = DECL_RTL (decl);
if (GET_CODE (x) != MEM)
abort ();
x = XEXP (x, 0);
if (GET_CODE (x) != SYMBOL_REF)
abort ();
fnname = XSTR (x, 0);
assemble_start_function (decl, fnname);
final_start_function (insns, asm_out_file, optimize);
final (insns, asm_out_file, optimize, 0);
final_end_function (insns, asm_out_file, optimize);
assemble_end_function (decl, fnname);
if (! quiet_flag)
fflush (asm_out_file);
/* Release all memory allocated by flow. */
free_basic_block_vars (0);
/* Release all memory held by regsets now */
regset_release_memory ();
});
if (ggc_p)
ggc_collect ();
/* Write DBX symbols if requested */
/* Note that for those inline functions where we don't initially
know for certain that we will be generating an out-of-line copy,
the first invocation of this routine (rest_of_compilation) will
skip over this code by doing a `goto exit_rest_of_compilation;'.
Later on, finish_compilation will call rest_of_compilation again
for those inline functions that need to have out-of-line copies
generated. During that call, we *will* be routed past here. */
#ifdef DBX_DEBUGGING_INFO
if (write_symbols == DBX_DEBUG)
TIMEVAR (symout_time, dbxout_function (decl));
#endif
#ifdef DWARF_DEBUGGING_INFO
if (write_symbols == DWARF_DEBUG)
TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
#endif
#ifdef DWARF2_DEBUGGING_INFO
if (write_symbols == DWARF2_DEBUG)
TIMEVAR (symout_time, dwarf2out_decl (decl));
#endif
exit_rest_of_compilation:
/* In case the function was not output,
don't leave any temporary anonymous types
queued up for sdb output. */
#ifdef SDB_DEBUGGING_INFO
if (write_symbols == SDB_DEBUG)
sdbout_types (NULL_TREE);
#endif
reload_completed = 0;
flow2_completed = 0;
no_new_pseudos = 0;
TIMEVAR (final_time,
{
/* Clear out the insn_length contents now that they are no
longer valid. */
init_insn_lengths ();
/* Clear out the real_constant_chain before some of the rtx's
it runs through become garbage. */
clear_const_double_mem ();
/* Cancel the effect of rtl_in_current_obstack. */
resume_temporary_allocation ();
/* Show no temporary slots allocated. */
init_temp_slots ();
free_basic_block_vars (0);
});
/* Make sure volatile mem refs aren't considered valid operands for
arithmetic insns. We must call this here if this is a nested inline
function, since the above code leaves us in the init_recog state
(from final.c), and the function context push/pop code does not
save/restore volatile_ok.
??? Maybe it isn't necessary for expand_start_function to call this
anymore if we do it here? */
init_recog_no_volatile ();
/* We're done with this function. Free up memory if we can. */
free_after_parsing (cfun);
if (! DECL_DEFER_OUTPUT (decl))
free_after_compilation (cfun);
cfun = 0;
if (ggc_p)
ggc_collect ();
/* The parsing time is all the time spent in yyparse
*except* what is spent in this function. */
parse_time -= get_run_time () - start_time;
}
static void
display_help ()
{
int undoc;
unsigned long i;
const char * lang;
#ifndef USE_CPPLIB
printf ("Usage: %s input [switches]\n", progname);
printf ("Switches:\n");
#endif
printf (" -ffixed-<register> Mark <register> as being unavailable to the compiler\n");
printf (" -fcall-used-<register> Mark <register> as being corrupted by function calls\n");
printf (" -fcall-saved-<register> Mark <register> as being preserved across functions\n");
printf (" -finline-limit=<number> Limits the size of inlined functions to <number>\n");
for (i = NUM_ELEM (f_options); i--;)
{
const char * description = f_options[i].description;
if (description != NULL && * description != 0)
printf (" -f%-21s %s\n",
f_options[i].string, description);
}
printf (" -O[number] Set optimisation level to [number]\n");
printf (" -Os Optimise for space rather than speed\n");
printf (" -pedantic Issue warnings needed by strict compliance to ANSI C\n");
printf (" -pedantic-errors Like -pedantic except that errors are produced\n");
printf (" -w Suppress warnings\n");
printf (" -W Enable extra warnings\n");
for (i = NUM_ELEM (W_options); i--;)
{
const char * description = W_options[i].description;
if (description != NULL && * description != 0)
printf (" -W%-21s %s\n",
W_options[i].string, description);
}
printf (" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n");
printf (" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n");
printf (" -p Enable function profiling\n");
#if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
printf (" -a Enable block profiling \n");
#endif
#if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
printf (" -ax Enable jump profiling \n");
#endif
printf (" -o <file> Place output into <file> \n");
printf (" -G <number> Put global and static data smaller than <number>\n");
printf (" bytes into a special section (on some targets)\n");
for (i = NUM_ELEM (debug_args); i--;)
{
if (debug_args[i].description != NULL)
printf (" -g%-21s %s\n", debug_args[i].arg, debug_args[i].description);
}
printf (" -aux-info <file> Emit declaration info into <file>.X\n");
printf (" -quiet Do not display functions compiled or elapsed time\n");
printf (" -version Display the compiler's version\n");
printf (" -d[letters] Enable dumps from specific passes of the compiler\n");
printf (" -dumpbase <file> Base name to be used for dumps from specific passes\n");
#if defined INSN_SCHEDULING
printf (" -sched-verbose=<number> Set the verbosity level of the scheduler\n");
#endif
printf (" --help Display this information\n");
undoc = 0;
lang = "language";
/* Display descriptions of language specific options.
If there is no description, note that there is an undocumented option.
If the description is empty, do not display anything. (This allows
options to be deliberately undocumented, for whatever reason).
If the option string is missing, then this is a marker, indicating
that the description string is in fact the name of a language, whose
language specific options are to follow. */
if (NUM_ELEM (documented_lang_options) > 1)
{
printf ("\nLanguage specific options:\n");
for (i = 0; i < NUM_ELEM (documented_lang_options); i++)
{
const char * description = documented_lang_options[i].description;
const char * option = documented_lang_options[i].option;
if (description == NULL)
{
undoc = 1;
if (extra_warnings)
printf (" %-23.23s [undocumented]\n", option);
}
else if (* description == 0)
continue;
else if (option == NULL)
{
if (undoc)
printf
("\nThere are undocumented %s specific options as well.\n",
lang);
undoc = 0;
printf ("\n Options for %s:\n", description);
lang = description;
}
else
printf (" %-23.23s %s\n", option, description);
}
}
if (undoc)
printf ("\nThere are undocumented %s specific options as well.\n", lang);
if (NUM_ELEM (target_switches) > 1
#ifdef TARGET_OPTIONS
|| NUM_ELEM (target_options) > 1
#endif
)
{
int doc = 0;
undoc = 0;
printf ("\nTarget specific options:\n");
for (i = NUM_ELEM (target_switches); i--;)
{
const char * option = target_switches[i].name;
const char * description = target_switches[i].description;
if (option == NULL || * option == 0)
continue;
else if (description == NULL)
{
undoc = 1;
if (extra_warnings)
printf (" -m%-21.21s [undocumented]\n", option);
}
else if (* description != 0)
doc += printf (" -m%-21.21s %s\n", option, description);
}
#ifdef TARGET_OPTIONS
for (i = NUM_ELEM (target_options); i--;)
{
const char * option = target_options[i].prefix;
const char * description = target_options[i].description;
if (option == NULL || * option == 0)
continue;
else if (description == NULL)
{
undoc = 1;
if (extra_warnings)
printf (" -m%-21.21s [undocumented]\n", option);
}
else if (* description != 0)
doc += printf (" -m%-21.21s %s\n", option, description);
}
#endif
if (undoc)
{
if (doc)
printf ("\nThere are undocumented target specific options as well.\n");
else
printf (" They exist, but they are not documented.\n");
}
}
}
/* Parse a -d... comand line switch. */
static void
decode_d_option (arg)
const char * arg;
{
while (* arg)
switch (* arg ++)
{
case 'a':
branch_prob_dump = 1;
combine_dump = 1;
#ifdef DELAY_SLOTS
dbr_sched_dump = 1;
#endif
flow_dump = 1;
flow2_dump = 1;
global_reg_dump = 1;
jump_opt_dump = 1;
addressof_dump = 1;
jump2_opt_dump = 1;
local_reg_dump = 1;
loop_dump = 1;
regmove_dump = 1;
rtl_dump = 1;
cse_dump = 1;
cse2_dump = 1;
gcse_dump = 1;
sched_dump = 1;
sched2_dump = 1;
#ifdef STACK_REGS
stack_reg_dump = 1;
#endif
#ifdef MACHINE_DEPENDENT_REORG
mach_dep_reorg_dump = 1;
#endif
peephole2_dump = 1;
break;
case 'A':
flag_debug_asm = 1;
break;
case 'b':
branch_prob_dump = 1;
break;
case 'c':
combine_dump = 1;
break;
#ifdef DELAY_SLOTS
case 'd':
dbr_sched_dump = 1;
break;
#endif
case 'f':
flow_dump = 1;
break;
case 'F':
addressof_dump = 1;
break;
case 'g':
global_reg_dump = 1;
break;
case 'G':
gcse_dump = 1;
break;
case 'j':
jump_opt_dump = 1;
break;
case 'J':
jump2_opt_dump = 1;
break;
#ifdef STACK_REGS
case 'k':
stack_reg_dump = 1;
break;
#endif
case 'l':
local_reg_dump = 1;
break;
case 'L':
loop_dump = 1;
break;
case 'm':
flag_print_mem = 1;
break;
#ifdef MACHINE_DEPENDENT_REORG
case 'M':
mach_dep_reorg_dump = 1;
break;
#endif
case 'p':
flag_print_asm_name = 1;
break;
case 'r':
rtl_dump = 1;
break;
case 'R':
sched2_dump = 1;
break;
case 's':
cse_dump = 1;
break;
case 'S':
sched_dump = 1;
break;
case 't':
cse2_dump = 1;
break;
case 'N':
regmove_dump = 1;
break;
case 'v':
graph_dump_format = vcg;
break;
case 'w':
flow2_dump = 1;
break;
case 'x':
rtl_dump_and_exit = 1;
break;
case 'y':
set_yydebug (1);
break;
case 'z':
peephole2_dump = 1;
break;
case 'D': /* These are handled by the preprocessor. */
case 'I':
break;
default:
warning ("unrecognised gcc debugging option: %c", arg[-1]);
break;
}
}
/* Parse a -f... comand line switch. ARG is the value after the -f.
It is safe to access 'ARG - 2' to generate the full switch name.
Return the number of strings consumed. */
static int
decode_f_option (arg)
const char * arg;
{
int j;
/* Search for the option in the table of binary f options. */
for (j = sizeof (f_options) / sizeof (f_options[0]); j--;)
{
if (!strcmp (arg, f_options[j].string))
{
*f_options[j].variable = f_options[j].on_value;
return 1;
}
if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
&& ! strcmp (arg + 3, f_options[j].string))
{
*f_options[j].variable = ! f_options[j].on_value;
return 1;
}
}
if (!strncmp (arg, "inline-limit-", 13)
|| !strncmp (arg, "inline-limit=", 13))
inline_max_insns =
read_integral_parameter (arg + 13, arg - 2, inline_max_insns);
#ifdef INSN_SCHEDULING
else if (!strncmp (arg, "sched-verbose=", 14))
fix_sched_param ("verbose", (const char *)(arg + 14));
#endif
else if (!strncmp (arg, "fixed-", 6))
fix_register ((const char *)(arg + 6), 1, 1);
else if (!strncmp (arg, "call-used-", 10))
fix_register ((const char *)(arg + 10), 0, 1);
else if (!strncmp (arg, "call-saved-", 11))
fix_register ((const char *)(arg + 11), 0, 0);
else if (!strncmp (arg, "align-loops=", 12))
align_loops = read_integral_parameter (arg + 12, arg - 2, align_loops);
else if (!strncmp (arg, "align-functions=", 16))
align_functions =
read_integral_parameter (arg + 16, arg - 2, align_functions);
else if (!strncmp (arg, "align-jumps=", 12))
align_jumps = read_integral_parameter (arg + 12, arg - 2, align_jumps);
else if (!strncmp (arg, "align-labels=", 13))
align_labels = read_integral_parameter (arg + 13, arg - 2, align_labels);
else if (!strncmp (arg, "stack-limit-register=", 21))
{
int reg = decode_reg_name (arg + 21);
if (reg < 0)
error ("unrecognized register name `%s'", arg + 21);
else
stack_limit_rtx = gen_rtx_REG (Pmode, reg);
}
else if (!strncmp (arg, "stack-limit-symbol=", 19))
{
char *nm;
if (ggc_p)
nm = ggc_alloc_string (arg + 19, strlen (arg + 19));
else
nm = xstrdup (arg + 19);
stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm);
}
else if (!strcmp (arg, "no-stack-limit"))
stack_limit_rtx = NULL_RTX;
else if (!strcmp (arg, "preprocessed"))
/* Recognise this switch but do nothing. This prevents warnings
about an unrecognised switch if cpplib has not been linked in. */
;
else
return 0;
return 1;
}
/* Parse a -W... comand line switch. ARG is the value after the -W.
It is safe to access 'ARG - 2' to generate the full switch name.
Return the number of strings consumed. */
static int
decode_W_option (arg)
const char * arg;
{
int j;
/* Search for the option in the table of binary W options. */
for (j = sizeof (W_options) / sizeof (W_options[0]); j--;)
{
if (!strcmp (arg, W_options[j].string))
{
*W_options[j].variable = W_options[j].on_value;
return 1;
}
if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
&& ! strcmp (arg + 3, W_options[j].string))
{
*W_options[j].variable = ! W_options[j].on_value;
return 1;
}
}
if (!strncmp (arg, "id-clash-", 9))
{
const int id_clash_val = read_integral_parameter (arg + 9, arg - 2, -1);
if (id_clash_val != -1)
{
id_clash_len = id_clash_val;
warn_id_clash = 1;
}
}
else if (!strncmp (arg, "larger-than-", 12))
{
const int larger_than_val =
read_integral_parameter (arg + 12, arg - 2, -1);
if (larger_than_val != -1)
{
larger_than_size = larger_than_val;
warn_larger_than = 1;
}
}
else
return 0;
return 1;
}
/* Parse a -g... comand line switch. ARG is the value after the -g.
It is safe to access 'ARG - 2' to generate the full switch name.
Return the number of strings consumed. */
static int
decode_g_option (arg)
const char * arg;
{
unsigned level;
/* A lot of code assumes write_symbols == NO_DEBUG if the
debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
of what debugging type has been selected). This records the
selected type. It is an error to specify more than one
debugging type. */
static enum debug_info_type selected_debug_type = NO_DEBUG;
/* Non-zero if debugging format has been explicitly set.
-g and -ggdb don't explicitly set the debugging format so
-gdwarf -g3 is equivalent to -gdwarf3. */
static int type_explicitly_set_p = 0;
/* Indexed by enum debug_info_type. */
static const char * debug_type_names[] =
{
"none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
};
/* The maximum admissible debug level value. */
static const unsigned max_debug_level = 3;
/* Look up ARG in the table. */
for (da = debug_args; da->arg; da++)
{
const int da_len = strlen (da->arg);
if (da_len == 0 || ! strncmp (arg, da->arg, da_len))
{
enum debug_info_type type = da->debug_type;
const char * p = arg + da_len;
if (*p && (*p < '0' || *p > '9'))
continue;
/* A debug flag without a level defaults to level 2.
Note we do not want to call read_integral_parameter
for that case since it will call atoi which
will return zero.
??? We may want to generalize the interface to
read_integral_parameter to better handle this case
if this case shows up often. */
if (*p)
level = read_integral_parameter (p, 0, max_debug_level + 1);
else
level = 2;
if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len))
{
error ("use -gdwarf -g%d for DWARF v1, level %d",
level, level);
if (level == 2)
error ("use -gdwarf-2 for DWARF v2");
}
if (level > max_debug_level)
{
warning ("\
ignoring option `%s' due to invalid debug level specification",
arg - 2);
level = debug_info_level;
}
if (type == NO_DEBUG)
{
type = PREFERRED_DEBUGGING_TYPE;
if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0)
{
#if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
type = DWARF2_DEBUG;
#else
#ifdef DBX_DEBUGGING_INFO
type = DBX_DEBUG;
#endif
#endif
}
}
if (type == NO_DEBUG)
warning ("`%s': unknown or unsupported -g option", arg - 2);
/* Does it conflict with an already selected type? */
if (type_explicitly_set_p
/* -g/-ggdb don't conflict with anything */
&& da->debug_type != NO_DEBUG
&& type != selected_debug_type)
warning ("`%s' ignored, conflicts with `-g%s'",
arg - 2, debug_type_names[(int) selected_debug_type]);
else
{
/* If the format has already been set, -g/-ggdb
only change the debug level. */
if (type_explicitly_set_p && da->debug_type == NO_DEBUG)
; /* don't change debugging type */
else
{
selected_debug_type = type;
type_explicitly_set_p = da->debug_type != NO_DEBUG;
}
write_symbols = (level == 0
? NO_DEBUG
: selected_debug_type);
use_gnu_debug_info_extensions = da->use_extensions_p;
debug_info_level = (enum debug_info_level) level;
}
break;
}
}
if (! da->arg)
warning ("`%s': unknown or unsupported -g option", arg - 2);
return 1;
}
/* Decode the first argument in the argv as a language-independent option.
Return the number of strings consumed. 'strings_processed' is the
number of strings that have already been decoded in a language
specific fashion before this function was invoked. */
static unsigned
independent_decode_option (argc, argv, strings_processed)
int argc;
char ** argv;
unsigned strings_processed ATTRIBUTE_UNUSED;
{
char * arg = argv[0];
if (arg[0] != '-' || arg[1] == 0)
{
if (arg[0] == '+')
return 0;
filename = arg;
return 1;
}
arg ++;
if (!strcmp (arg, "-help"))
{
display_help ();
exit (0);
}
if (* arg == 'Y')
arg ++;
switch (* arg)
{
default:
return 0;
case 'O':
/* Already been treated in main (). Do nothing. */
break;
case 'm':
set_target_switch (arg + 1);
break;
case 'f':
return decode_f_option (arg + 1);
case 'g':
return decode_g_option (arg + 1);
case 'd':
if (!strcmp (arg, "dumpbase"))
{
if (argc == 1)
return 0;
dump_base_name = argv[1];
return 2;
}
else
decode_d_option (arg + 1);
break;
case 'p':
if (!strcmp (arg, "pedantic"))
pedantic = 1;
else if (!strcmp (arg, "pedantic-errors"))
flag_pedantic_errors = pedantic = 1;
else if (arg[1] == 0)
profile_flag = 1;
else
return 0;
break;
case 'q':
if (!strcmp (arg, "quiet"))
quiet_flag = 1;
else
return 0;
break;
case 'v':
if (!strcmp (arg, "version"))
version_flag = 1;
else
return 0;
break;
case 'w':
if (arg[1] == 0)
inhibit_warnings = 1;
else
return 0;
break;
case 'W':
if (arg[1] == 0)
{
extra_warnings = 1;
/* We save the value of warn_uninitialized, since if they put
-Wuninitialized on the command line, we need to generate a
warning about not using it without also specifying -O. */
if (warn_uninitialized != 1)
warn_uninitialized = 2;
}
else
return decode_W_option (arg + 1);
break;
case 'a':
if (arg[1] == 0)
{
#if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
warning ("`-a' option (basic block profile) not supported");
#else
profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
#endif
}
else if (!strcmp (arg, "ax"))
{
#if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
warning ("`-ax' option (jump profiling) not supported");
#else
profile_block_flag = (!profile_block_flag
|| profile_block_flag == 2) ? 2 : 3;
#endif
}
else if (!strncmp (arg, "aux-info", 8))
{
flag_gen_aux_info = 1;
if (arg[8] == '\0')
{
if (argc == 1)
return 0;
aux_info_file_name = argv[1];
return 2;
}
else
aux_info_file_name = arg + 8;
}
else
return 0;
break;
case 'o':
if (arg[1] == 0)
{
if (argc == 1)
return 0;
asm_file_name = argv[1];
return 2;
}
return 0;
case 'G':
{
int g_switch_val;
int return_val;
if (arg[1] == 0)
{
if (argc == 1)
return 0;
g_switch_val = read_integral_parameter (argv[1], 0, -1);
return_val = 2;
}
else
{
g_switch_val = read_integral_parameter (arg + 1, 0, -1);
return_val = 1;
}
if (g_switch_val == -1)
return_val = 0;
else
{
g_switch_set = TRUE;
g_switch_value = g_switch_val;
}
return return_val;
}
}
return 1;
}
/* Entry point of cc1/c++. Decode command args, then call compile_file.
Exit code is 35 if can't open files, 34 if fatal error,
33 if had nonfatal errors, else success. */
extern int main PROTO ((int, char **));
int
main (argc, argv)
int argc;
char **argv;
{
register int i;
char *p;
/* save in case md file wants to emit args as a comment. */
save_argc = argc;
save_argv = argv;
p = argv[0] + strlen (argv[0]);
while (p != argv[0] && p[-1] != '/'
#ifdef DIR_SEPARATOR
&& p[-1] != DIR_SEPARATOR
#endif
)
--p;
progname = p;
#ifdef HAVE_LC_MESSAGES
setlocale (LC_MESSAGES, "");
#endif
(void) bindtextdomain (PACKAGE, localedir);
(void) textdomain (PACKAGE);
signal (SIGFPE, float_signal);
#ifdef SIGPIPE
signal (SIGPIPE, pipe_closed);
#endif
decl_printable_name = decl_name;
lang_expand_expr = (lang_expand_expr_t) do_abort;
/* Initialize whether `char' is signed. */
flag_signed_char = DEFAULT_SIGNED_CHAR;
#ifdef DEFAULT_SHORT_ENUMS
/* Initialize how much space enums occupy, by default. */
flag_short_enums = DEFAULT_SHORT_ENUMS;
#endif
/* Initialize the garbage-collector. */
init_ggc ();
ggc_add_root (&input_file_stack, 1, sizeof input_file_stack,
&mark_file_stack);
ggc_add_rtx_root (&stack_limit_rtx, 1);
/* Perform language-specific options intialization. */
lang_init_options ();
/* Scan to see what optimization level has been specified. That will
determine the default value of many flags. */
for (i = 1; i < argc; i++)
{
if (!strcmp (argv[i], "-O"))
{
optimize = 1;
optimize_size = 0;
}
else if (argv[i][0] == '-' && argv[i][1] == 'O')
{
/* Handle -Os, -O2, -O3, -O69, ... */
char *p = &argv[i][2];
if ((p[0] == 's') && (p[1] == 0))
{
optimize_size = 1;
/* Optimizing for size forces optimize to be 2. */
optimize = 2;
}
else
{
const int optimize_val = read_integral_parameter (p, p - 2, -1);
if (optimize_val != -1)
{
optimize = optimize_val;
optimize_size = 0;
}
}
}
}
obey_regdecls = (optimize == 0);
if (optimize >= 1)
{
flag_defer_pop = 1;
flag_thread_jumps = 1;
#ifdef DELAY_SLOTS
flag_delayed_branch = 1;
#endif
#ifdef CAN_DEBUG_WITHOUT_FP
flag_omit_frame_pointer = 1;
#endif
}
if (optimize >= 2)
{
flag_cse_follow_jumps = 1;
flag_cse_skip_blocks = 1;
flag_gcse = 1;
flag_expensive_optimizations = 1;
flag_strength_reduce = 1;
flag_rerun_cse_after_loop = 1;
flag_rerun_loop_opt = 1;
flag_caller_saves = 1;
flag_force_mem = 1;
flag_peephole2 = 1;
#ifdef INSN_SCHEDULING
flag_schedule_insns = 1;
flag_schedule_insns_after_reload = 1;
#endif
flag_regmove = 1;
flag_strict_aliasing = 1;
flag_delete_null_pointer_checks = 1;
}
if (optimize >= 3)
{
flag_inline_functions = 1;
}
if (optimize < 2 || optimize_size)
{
align_loops = 1;
align_jumps = 1;
align_labels = 1;
align_functions = 1;
}
/* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
modify it. */
target_flags = 0;
set_target_switch ("");
#ifdef OPTIMIZATION_OPTIONS
/* Allow default optimizations to be specified on a per-machine basis. */
OPTIMIZATION_OPTIONS (optimize, optimize_size);
#endif
/* Initialize register usage now so switches may override. */
init_reg_sets ();
/* Perform normal command line switch decoding. */
for (i = 1; i < argc;)
{
unsigned lang_processed;
unsigned indep_processed;
/* Give the language a chance to decode the option for itself. */
lang_processed = lang_decode_option (argc - i, argv + i);
/* Now see if the option also has a language independent meaning.
Some options are both language specific and language independent,
eg --help. It is possible that there might be options that should
only be decoded in a language independent way if the were not
decoded in a langauge specific way, which is why 'lang_processed'
is passed in. */
indep_processed = independent_decode_option (argc - i, argv + i,
lang_processed);
if (lang_processed || indep_processed)
i += (lang_processed > indep_processed
? lang_processed : indep_processed);
else
{
const char * option = NULL;
const char * lang = NULL;
unsigned int j;
/* It is possible that the command line switch is not valid for the
current language, but it is valid for another language. In order
to be compatible with previous versions of the compiler (which
did not issue an error message in this case) we check for this
possibilty here. If we do find a match, then if extra_warnings
is set we generate a warning message, otherwise we will just
ignore the option. */
for (j = 0; j < NUM_ELEM (documented_lang_options); j++)
{
option = documented_lang_options[j].option;
if (option == NULL)
lang = documented_lang_options[j].description;
else if (! strncmp (argv[i], option, strlen (option)))
break;
}
if (j != NUM_ELEM (documented_lang_options))
{
if (extra_warnings)
{
warning ("Ignoring command line option '%s'", argv[i]);
if (lang)
warning ("\
(It is valid for %s but not the selected langauge)", lang);
}
}
else
error ("Unrecognised option `%s'", argv[i]);
i++;
}
}
/* Checker uses the frame pointer. */
if (flag_check_memory_usage)
flag_omit_frame_pointer = 0;
if (optimize == 0)
{
/* Inlining does not work if not optimizing,
so force it not to be done. */
flag_no_inline = 1;
warn_inline = 0;
/* The c_decode_option and lang_decode_option functions set
this to `2' if -Wall is used, so we can avoid giving out
lots of errors for people who don't realize what -Wall does. */
if (warn_uninitialized == 1)
warning ("-Wuninitialized is not supported without -O");
}
#ifdef OVERRIDE_OPTIONS
/* Some machines may reject certain combinations of options. */
OVERRIDE_OPTIONS;
#endif
if (exceptions_via_longjmp == 2)
{
#ifdef DWARF2_UNWIND_INFO
exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
#else
exceptions_via_longjmp = 1;
#endif
}
/* Set up the align_*_log variables, defaulting them to 1 if they
were still unset. */
if (align_loops <= 0) align_loops = 1;
align_loops_log = floor_log2 (align_loops*2-1);
if (align_jumps <= 0) align_jumps = 1;
align_jumps_log = floor_log2 (align_jumps*2-1);
if (align_labels <= 0) align_labels = 1;
align_labels_log = floor_log2 (align_labels*2-1);
if (align_functions <= 0) align_functions = 1;
align_functions_log = floor_log2 (align_functions*2-1);
if (profile_block_flag == 3)
{
warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
profile_block_flag = 2;
}
/* Unrolling all loops implies that standard loop unrolling must also
be done. */
if (flag_unroll_all_loops)
flag_unroll_loops = 1;
/* Loop unrolling requires that strength_reduction be on also. Silently
turn on strength reduction here if it isn't already on. Also, the loop
unrolling code assumes that cse will be run after loop, so that must
be turned on also. */
if (flag_unroll_loops)
{
flag_strength_reduce = 1;
flag_rerun_cse_after_loop = 1;
}
/* Warn about options that are not supported on this machine. */
#ifndef INSN_SCHEDULING
if (flag_schedule_insns || flag_schedule_insns_after_reload)
warning ("instruction scheduling not supported on this target machine");
#endif
#ifndef DELAY_SLOTS
if (flag_delayed_branch)
warning ("this target machine does not have delayed branches");
#endif
user_label_prefix = USER_LABEL_PREFIX;
if (flag_leading_underscore != -1)
{
/* If the default prefix is more complicated than "" or "_",
issue a warning and ignore this option. */
if (user_label_prefix[0] == 0 ||
(user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
{
user_label_prefix = flag_leading_underscore ? "_" : "";
}
else
warning ("-f%sleading-underscore not supported on this target machine",
flag_leading_underscore ? "" : "no-");
}
/* If we are in verbose mode, write out the version and maybe all the
option flags in use. */
if (version_flag)
{
print_version (stderr, "");
if (! quiet_flag)
print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
}
compile_file (filename);
#if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
if (flag_print_mem)
{
char *lim = (char *) sbrk (0);
fnotice (stderr, "Data size %ld.\n", (long) (lim - (char *) &environ));
fflush (stderr);
#ifndef __MSDOS__
#ifdef USG
system ("ps -l 1>&2");
#else /* not USG */
system ("ps v");
#endif /* not USG */
#endif
}
#endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
if (errorcount)
return (FATAL_EXIT_CODE);
if (sorrycount)
return (FATAL_EXIT_CODE);
return (SUCCESS_EXIT_CODE);
}
/* Decode -m switches. */
/* Decode the switch -mNAME. */
static void
set_target_switch (name)
const char *name;
{
register size_t j;
int valid_target_option = 0;
for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
if (!strcmp (target_switches[j].name, name))
{
if (target_switches[j].value < 0)
target_flags &= ~-target_switches[j].value;
else
target_flags |= target_switches[j].value;
valid_target_option = 1;
}
#ifdef TARGET_OPTIONS
if (!valid_target_option)
for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
{
int len = strlen (target_options[j].prefix);
if (!strncmp (target_options[j].prefix, name, len))
{
*target_options[j].variable = name + len;
valid_target_option = 1;
}
}
#endif
if (!valid_target_option)
error ("Invalid option `%s'", name);
}
/* Print version information to FILE.
Each line begins with INDENT (for the case where FILE is the
assembler output file). */
static void
print_version (file, indent)
FILE *file;
const char *indent;
{
#ifndef __VERSION__
#define __VERSION__ "[?]"
#endif
fnotice (file,
#ifdef __GNUC__
"%s%s%s version %s (%s) compiled by GNU C version %s.\n"
#else
"%s%s%s version %s (%s) compiled by CC.\n"
#endif
, indent, *indent != 0 ? " " : "",
language_string, version_string, TARGET_NAME, __VERSION__);
}
/* Print an option value and return the adjusted position in the line.
??? We don't handle error returns from fprintf (disk full); presumably
other code will catch a disk full though. */
static int
print_single_switch (file, pos, max, indent, sep, term, type, name)
FILE *file;
int pos, max;
const char *indent, *sep, *term, *type, *name;
{
/* The ultrix fprintf returns 0 on success, so compute the result we want
here since we need it for the following test. */
int len = strlen (sep) + strlen (type) + strlen (name);
if (pos != 0
&& pos + len > max)
{
fprintf (file, "%s", term);
pos = 0;
}
if (pos == 0)
{
fprintf (file, "%s", indent);
pos = strlen (indent);
}
fprintf (file, "%s%s%s", sep, type, name);
pos += len;
return pos;
}
/* Print active target switches to FILE.
POS is the current cursor position and MAX is the size of a "line".
Each line begins with INDENT and ends with TERM.
Each switch is separated from the next by SEP. */
static void
print_switch_values (file, pos, max, indent, sep, term)
FILE *file;
int pos, max;
const char *indent, *sep, *term;
{
size_t j;
char **p;
/* Print the options as passed. */
pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
_("options passed: "), "");
for (p = &save_argv[1]; *p != NULL; p++)
if (**p == '-')
{
/* Ignore these. */
if (strcmp (*p, "-o") == 0)
{
if (p[1] != NULL)
p++;
continue;
}
if (strcmp (*p, "-quiet") == 0)
continue;
if (strcmp (*p, "-version") == 0)
continue;
if ((*p)[1] == 'd')
continue;
pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
}
if (pos > 0)
fprintf (file, "%s", term);
/* Print the -f and -m options that have been enabled.
We don't handle language specific options but printing argv
should suffice. */
pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
_("options enabled: "), "");
for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
if (*f_options[j].variable == f_options[j].on_value)
pos = print_single_switch (file, pos, max, indent, sep, term,
"-f", f_options[j].string);
/* Print target specific options. */
for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
if (target_switches[j].name[0] != '\0'
&& target_switches[j].value > 0
&& ((target_switches[j].value & target_flags)
== target_switches[j].value))
{
pos = print_single_switch (file, pos, max, indent, sep, term,
"-m", target_switches[j].name);
}
#ifdef TARGET_OPTIONS
for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
if (*target_options[j].variable != NULL)
{
char prefix[256];
sprintf (prefix, "-m%s", target_options[j].prefix);
pos = print_single_switch (file, pos, max, indent, sep, term,
prefix, *target_options[j].variable);
}
#endif
fprintf (file, "%s", term);
}
/* Record the beginning of a new source file, named FILENAME. */
void
debug_start_source_file (filename)
register char *filename ATTRIBUTE_UNUSED;
{
#ifdef DBX_DEBUGGING_INFO
if (write_symbols == DBX_DEBUG)
dbxout_start_new_source_file (filename);
#endif
#ifdef DWARF_DEBUGGING_INFO
if (debug_info_level == DINFO_LEVEL_VERBOSE
&& write_symbols == DWARF_DEBUG)
dwarfout_start_new_source_file (filename);
#endif /* DWARF_DEBUGGING_INFO */
#ifdef DWARF2_DEBUGGING_INFO
if (debug_info_level == DINFO_LEVEL_VERBOSE
&& write_symbols == DWARF2_DEBUG)
dwarf2out_start_source_file (filename);
#endif /* DWARF2_DEBUGGING_INFO */
#ifdef SDB_DEBUGGING_INFO
if (write_symbols == SDB_DEBUG)
sdbout_start_new_source_file (filename);
#endif
}
/* Record the resumption of a source file. LINENO is the line number in
the source file we are returning to. */
void
debug_end_source_file (lineno)
register unsigned lineno ATTRIBUTE_UNUSED;
{
#ifdef DBX_DEBUGGING_INFO
if (write_symbols == DBX_DEBUG)
dbxout_resume_previous_source_file ();
#endif
#ifdef DWARF_DEBUGGING_INFO
if (debug_info_level == DINFO_LEVEL_VERBOSE
&& write_symbols == DWARF_DEBUG)
dwarfout_resume_previous_source_file (lineno);
#endif /* DWARF_DEBUGGING_INFO */
#ifdef DWARF2_DEBUGGING_INFO
if (debug_info_level == DINFO_LEVEL_VERBOSE
&& write_symbols == DWARF2_DEBUG)
dwarf2out_end_source_file ();
#endif /* DWARF2_DEBUGGING_INFO */
#ifdef SDB_DEBUGGING_INFO
if (write_symbols == SDB_DEBUG)
sdbout_resume_previous_source_file ();
#endif
}
/* Called from check_newline in c-parse.y. The `buffer' parameter contains
the tail part of the directive line, i.e. the part which is past the
initial whitespace, #, whitespace, directive-name, whitespace part. */
void
debug_define (lineno, buffer)
register unsigned lineno ATTRIBUTE_UNUSED;
register char *buffer ATTRIBUTE_UNUSED;
{
#ifdef DWARF_DEBUGGING_INFO
if (debug_info_level == DINFO_LEVEL_VERBOSE
&& write_symbols == DWARF_DEBUG)
dwarfout_define (lineno, buffer);
#endif /* DWARF_DEBUGGING_INFO */
#ifdef DWARF2_DEBUGGING_INFO
if (debug_info_level == DINFO_LEVEL_VERBOSE
&& write_symbols == DWARF2_DEBUG)
dwarf2out_define (lineno, buffer);
#endif /* DWARF2_DEBUGGING_INFO */
}
/* Called from check_newline in c-parse.y. The `buffer' parameter contains
the tail part of the directive line, i.e. the part which is past the
initial whitespace, #, whitespace, directive-name, whitespace part. */
void
debug_undef (lineno, buffer)
register unsigned lineno ATTRIBUTE_UNUSED;
register char *buffer ATTRIBUTE_UNUSED;
{
#ifdef DWARF_DEBUGGING_INFO
if (debug_info_level == DINFO_LEVEL_VERBOSE
&& write_symbols == DWARF_DEBUG)
dwarfout_undef (lineno, buffer);
#endif /* DWARF_DEBUGGING_INFO */
#ifdef DWARF2_DEBUGGING_INFO
if (debug_info_level == DINFO_LEVEL_VERBOSE
&& write_symbols == DWARF2_DEBUG)
dwarf2out_undef (lineno, buffer);
#endif /* DWARF2_DEBUGGING_INFO */
}
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