gcc/gcc
Eric Botcazou 6d80a8545b re PR middle-end/7153 (bad operands for 'movsbl' error)
PR optimization/7153
        * regmove.c (optimize_reg_copy_3): Don't optimize if the register
        dies in more than one insn.

From-SVN: r55468
2002-07-15 16:59:02 -07:00
..
ada make.adb (Add_Switch): Make Generic_Position a procedure. 2002-07-15 11:43:06 +02:00
config * config/sparc/netbsd-elf.h (TRANSFER_FROM_TRAMPOLINE): Remove. 2002-07-15 18:15:48 +00:00
cp Make gengtype.c language independent. 2002-07-14 01:59:15 +00:00
doc [multiple changes] 2002-07-15 14:07:06 +00:00
f Daily bump. 2002-07-15 07:16:52 +00:00
fixinc Makefile.in (SHELL): Set to @SHELL@. 2002-06-25 01:58:10 +00:00
ginclude
intl Fix typo last change. 2002-05-26 12:06:11 -07:00
java builtins.def: Make the argument types of abort and exit independent of the front-end. 2002-07-11 01:20:23 +00:00
objc Make gengtype.c language independent. 2002-07-14 01:59:15 +00:00
po
testsuite re PR middle-end/7153 (bad operands for 'movsbl' error) 2002-07-15 16:59:02 -07:00
treelang Make gengtype.c language independent. 2002-07-14 01:59:15 +00:00
.cvsignore Add more cscope data files 2002-06-10 02:36:06 +00:00
ABOUT-GCC-NLS
ABOUT-NLS
acconfig.h
aclocal.m4
alias.c c-common.c (c_common_get_alias_set): Correctly handle characters. 2002-06-20 00:30:04 -07:00
attribs.c alias.c: Fix formatting. 2002-05-26 15:01:11 +00:00
basic-block.h [multiple changes] 2002-07-15 14:07:06 +00:00
bb-reorder.c bb-reorder.c (make_reorder_chain_1): Search harder for the vax casesi fallthru edge. 2002-06-21 19:05:00 +00:00
bitmap.c Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
bitmap.h Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
builtin-attrs.def re PR c++/7099 (G++ doesn't set the noreturn attribute on std::exit and std::abort) 2002-07-06 00:16:44 +00:00
builtin-types.def
builtins.c re PR c++/7099 (G++ doesn't set the noreturn attribute on std::exit and std::abort) 2002-07-06 00:16:44 +00:00
builtins.def builtins.def: Make the argument types of abort and exit independent of the front-end. 2002-07-11 01:20:23 +00:00
c-aux-info.c
c-common.c c-common.c (c_common_post_options): Update prototype; don't init backends if preprocessing only. 2002-07-07 22:10:18 +00:00
c-common.def
c-common.h c-common.c (c_common_post_options): Update prototype; don't init backends if preprocessing only. 2002-07-07 22:10:18 +00:00
c-config-lang.in Make gengtype.c language independent. 2002-07-14 01:59:15 +00:00
c-convert.c
c-decl.c c-decl.c (duplicate_decls): Preserve the noreturn attribute on non-ANSI builtin functions. 2002-07-11 12:29:07 +00:00
c-errors.c toplev.h (report_error_function): Remove. 2002-06-05 19:35:45 +00:00
c-format.c toplev.h (report_error_function): Remove. 2002-06-05 19:35:45 +00:00
c-lang.c Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
c-lex.c re PR preprocessor/7070 (internal error with -Wunknown-pragmas && empty #pragma) 2002-06-27 05:59:53 +00:00
c-objc-common.c toplev.h (report_error_function): Remove. 2002-06-05 19:35:45 +00:00
c-parse.in copyright date updated 2002-07-05 12:34:58 +00:00
c-pragma.c c-pragma.h (add_to_renaming_pragma_list): New function. 2002-07-08 17:53:24 +00:00
c-pragma.h c-pragma.h (add_to_renaming_pragma_list): New function. 2002-07-08 17:53:24 +00:00
c-semantics.c
c-tree.h Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
c-typeck.c optabs.c (expand_vector_binop): Don't store using a SUBREG smaller than UNITS_PER_WORD... 2002-07-03 10:49:46 +01:00
caller-save.c alias.c (argument_registers): Remove. 2002-06-13 06:24:00 -06:00
calls.c Delete SEQUENCE rtl usage outside of reorg and ssa passes. 2002-06-11 05:22:48 -07:00
cfg.c basic-block.h (struct basic_block_def): New field loop_father. 2002-06-01 09:24:41 +00:00
cfganal.c basic-block.h (struct basic_block_def): New field loop_father. 2002-06-01 09:24:41 +00:00
cfgbuild.c i386.md (shift patterns): Use (TARGET_SHIFT1 || optimize_size) to decide whether emit the short opcode. 2002-06-12 14:51:09 +00:00
cfgcleanup.c cfgcleanup.c (try_optimize_cfg): Make sure merge_blocks doesn't merge bb with itself. 2002-06-10 23:36:15 +02:00
cfglayout.c bb-reorder.c (make_reorder_chain_1): Search harder for the vax casesi fallthru edge. 2002-06-21 19:05:00 +00:00
cfglayout.h
cfgloop.c Mon Jun 10 20:42:34 CEST 2002 Jan Hubicka <jh@suse.cz> 2002-06-20 17:51:06 +00:00
cfgrtl.c bb-reorder.c (make_reorder_chain_1): Search harder for the vax casesi fallthru edge. 2002-06-21 19:05:00 +00:00
ChangeLog re PR middle-end/7153 (bad operands for 'movsbl' error) 2002-07-15 16:59:02 -07:00
ChangeLog.0
ChangeLog.1
ChangeLog.2
ChangeLog.3
ChangeLog.4
ChangeLog.5
ChangeLog.6
ChangeLog.lib
collect2.c * collect2.c (scan_prog_file): Fix typo in message. 2002-06-29 22:51:11 +00:00
collect2.h
combine.c combine.c (try_combine): When converting a paradoxical subreg to an extension... 2002-07-11 22:03:51 +01:00
conditions.h
config.gcc config.gcc (sh64): Remove unused target_requires_64bit_host_wide_int. 2002-07-14 09:01:36 +02:00
config.guess
config.in configure.in (USE_UNWIND_EXCEPTIONS): Add support to set USE_UNWIND_EXCEPTIONS if --enable-libunwind-exceptions is set. 2002-06-14 18:16:28 -07:00
configure Make gengtype.c language independent. 2002-07-14 01:59:15 +00:00
configure.frag
configure.in Make gengtype.c language independent. 2002-07-14 01:59:15 +00:00
conflict.c bb-reorder.c (make_reorder_chain, [...]): Use FOR_EACH_BB macros to iterate over basic block chain. 2002-05-23 19:23:51 +00:00
convert.c simplify-rtx.c (simplify_subreg): Reduce problem of finding vector mode subregs of constants to finding integer... 2002-07-04 07:38:56 +01:00
convert.h
COPYING
COPYING.LIB
cppdefault.c
cppdefault.h
cpperror.c cpperror.c (cpp_error): Default to directive_line within directives here. 2002-07-09 22:21:37 +00:00
cppexp.c cpperror.c (cpp_error): Default to directive_line within directives here. 2002-07-09 22:21:37 +00:00
cppfiles.c cpperror.c: Fix formatting. 2002-05-22 22:02:16 +00:00
cpphash.c cpperror.c: Fix formatting. 2002-05-22 22:02:16 +00:00
cpphash.h cpphash.h (_cpp_set_trad_context): Remove. 2002-06-27 06:01:58 +00:00
cppinit.c cppinit.c (cpp_handle_option): Suppress warnings with an implicit "-w" for "-M" and "-MM". 2002-07-02 22:28:18 +00:00
cpplex.c Makefile.in: Update cppmain.o. 2002-06-11 05:36:17 +00:00
cpplib.c cpperror.c (cpp_error): Default to directive_line within directives here. 2002-07-09 22:21:37 +00:00
cpplib.h Makefile.in: Update cppmain.o. 2002-06-11 05:36:17 +00:00
cppmacro.c * cppmacro.c: Forgotten commit. 2002-07-01 12:47:54 +00:00
cppmain.c re PR preprocessor/7150 (gcc -dM -E ... SegFault) 2002-06-29 15:49:24 +00:00
cppspec.c cpperror.c: Fix formatting. 2002-05-22 22:02:16 +00:00
cpptrad.c cpperror.c (cpp_error): Default to directive_line within directives here. 2002-07-09 22:21:37 +00:00
crtstuff.c crtstuff.c (__EH_FRAME_BEGIN__): Conditionalize on USE_EH_FRAME_REGISTRY, not EH_FRAME_SECTION_NAME. 2002-06-03 19:55:28 -07:00
cse.c cse.c (cse_insn): Supply proper SUBREG_BYTE to simplify_gen_subreg. 2002-07-10 16:08:04 +01:00
cselib.c Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
cselib.h Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
cstamp-h.in
dbxout.c dbxout.c (dbxout_class_name_qualifiers): New function. 2002-05-22 23:50:32 -07:00
dbxout.h
dbxstclass.h
debug.c
debug.h
defaults.h simd-1.c: New. 2002-06-18 01:35:47 +00:00
dependence.c Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
df.c emit-rtl.c (init_emit): Add hard registers to regno_reg_rtx. 2002-06-07 19:51:22 -06:00
df.h [multiple changes] 2002-07-15 14:07:06 +00:00
diagnostic.c diagnostic.c (diagnostic_kind_text): Const-ify. 2002-06-20 16:59:01 +00:00
diagnostic.def * diagnostic.def: Don't capitalize diagnostic descriptors. 2002-06-08 11:25:28 +00:00
diagnostic.h diagnostic.h: #include location.h 2002-07-10 10:36:27 +00:00
doloop.c doloop.c (doloop_valid_p): Correct comment. 2002-06-24 11:46:42 +09:30
dominance.c * dominance.c: Include errors.h instead of error.h. 2002-06-20 22:33:42 +00:00
doschk.c
dwarf2.h
dwarf2asm.c Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
dwarf2asm.h
dwarf2out.c function.h (struct function): Rename profile_label_no. 2002-06-17 10:47:22 -07:00
dwarf2out.h function.h (struct function): Rename profile_label_no. 2002-06-17 10:47:22 -07:00
dwarf.h
dwarfout.c * dwarfout.c (dwarfout_init): Warn that DWARF1 is deprecated. 2002-07-09 17:04:56 +00:00
emit-rtl.c rtl.h (gen_rtx_CONST_VECTOR): Declare. 2002-07-11 11:32:54 +01:00
enquire.c
errors.c
errors.h emit-rtl.c: Likewise. 2002-06-03 01:13:17 +00:00
et-forest.c Mon Jun 10 20:42:34 CEST 2002 Jan Hubicka <jh@suse.cz> 2002-06-20 17:57:27 +00:00
et-forest.h Mon Jun 10 20:42:34 CEST 2002 Jan Hubicka <jh@suse.cz> 2002-06-20 17:57:27 +00:00
except.c except.c (expand_eh_region_end_cleanup): Change exception pointer from Pmode to ptr_mode. 2002-07-09 15:28:22 +00:00
except.h
explow.c * explow.c (probe_stack_range): Use gen_rtx_fmt_ee. 2002-06-20 16:15:17 -07:00
expmed.c sparc.c (INIT_TARGET_OPTABS): If ARCH64, set the 32-bit ABI libfuncs to NULL. 2002-06-24 03:08:38 -07:00
expr.c expr.c [...]: New macro defining the maximum number of move instructions to use when... 2002-07-13 00:13:15 +00:00
expr.h simd-1.c: New. 2002-06-18 01:35:47 +00:00
final.c function.h (struct function): Rename profile_label_no. 2002-06-17 10:47:22 -07:00
fix-header.c cpperror.c (_cpp_begin_message): No special casing of CPP_FATAL_LIMIT. 2002-05-23 06:07:45 +00:00
fixproto
flags.h flags.h (TLS_MODEL_GLOBAL_DYNAMIC): Set to 1. 2002-05-24 18:56:57 -07:00
floatlib.c
flow.c flow.c (propagate_one_insn): When removing an insn with a REG_LIBCALL note but not the entire libcall... 2002-06-24 14:20:52 -06:00
fold-const.c re PR rtl-optimization/4046 (redundant conditional branch) 2002-07-01 20:59:00 +00:00
fp-test.c
FSFChangeLog
FSFChangeLog.10
FSFChangeLog.11
function.c re PR middle-end/6963 (Linux kernel miscompile due to clobbered MEM_SIZE) 2002-06-22 14:26:53 +00:00
function.h function.h (struct emit_status): Clarify potential contents of regno_reg_rtx array. 2002-06-23 09:57:53 -06:00
future.options
gbl-ctors.h gbl-ctors.h: Fix formatting. 2002-06-04 11:30:46 +00:00
gcc.c gcc.c (asm_debug): Move initialization ... 2002-07-05 12:33:52 +00:00
gcc.h
gcc.hlp
gccbug.in
gccspec.c gbl-ctors.h: Fix formatting. 2002-06-04 11:30:46 +00:00
gcov-io.h gbl-ctors.h: Fix formatting. 2002-06-04 11:30:46 +00:00
gcov.c gbl-ctors.h: Fix formatting. 2002-06-04 11:30:46 +00:00
gcse.c * gcse.c (gcse_emit_move_after): Use gen_move_insn to produce the move. 2002-06-28 17:41:19 -06:00
gdbinit.in
gen-protos.c
genattr.c
genattrtab.c Delete SEQUENCE rtl usage outside of reorg and ssa passes. 2002-06-11 05:22:48 -07:00
genattrtab.h
genautomata.c genautomata.c (output_max_insn_queue_index_def): Take latencies into account. 2002-07-05 21:40:16 +00:00
gencheck.c
gencodes.c
genconfig.c
genconstants.c
genemit.c Delete SEQUENCE rtl usage outside of reorg and ssa passes. 2002-06-11 05:22:48 -07:00
genextract.c
genflags.c
gengenrtl.c rtl.h (gen_rtx_CONST_VECTOR): Declare. 2002-07-11 11:32:54 +01:00
gengtype-lex.l Make gengtype.c language independent. 2002-07-14 01:59:15 +00:00
gengtype-yacc.y c-parse.in (initelt: identifier ':' initval): Add an empty action to fix a type clash. 2002-06-20 01:30:57 +00:00
gengtype.c [multiple changes] 2002-07-15 14:07:06 +00:00
gengtype.h Make gengtype.c language independent. 2002-07-14 01:59:15 +00:00
genmultilib
genopinit.c
genoutput.c
genpeep.c
genpreds.c
genrecog.c Delete SEQUENCE rtl usage outside of reorg and ssa passes. 2002-06-11 05:22:48 -07:00
gensupport.c * gensupport.c: Fix misspelling. 2002-06-07 17:59:18 +00:00
gensupport.h
ggc-common.c Tue Jun 4 19:29:42 CEST 2002 Jan Hubicka <jh@suse.cz> 2002-06-04 17:32:59 +00:00
ggc-none.c Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
ggc-page.c gbl-ctors.h: Fix formatting. 2002-06-04 11:30:46 +00:00
ggc-simple.c gbl-ctors.h: Fix formatting. 2002-06-04 11:30:46 +00:00
ggc.h * ggc.h (ggc_add_root): Document as obsolete. 2002-07-04 21:24:25 +00:00
glimits.h c-common.c (builtin_define_type_max): New. 2002-06-11 20:06:30 -07:00
global.c gbl-ctors.h: Fix formatting. 2002-06-04 11:30:46 +00:00
gmon.c
graph.c bb-reorder.c (make_reorder_chain, [...]): Use FOR_EACH_BB macros to iterate over basic block chain. 2002-05-23 19:23:51 +00:00
graph.h gbl-ctors.h: Fix formatting. 2002-06-04 11:30:46 +00:00
gstab.h
gsyms.h
gsyslimits.h
gthr-aix.h
gthr-dce.h gbl-ctors.h: Fix formatting. 2002-06-04 11:30:46 +00:00
gthr-posix.h gbl-ctors.h: Fix formatting. 2002-06-04 11:30:46 +00:00
gthr-rtems.h gbl-ctors.h: Fix formatting. 2002-06-04 11:30:46 +00:00
gthr-single.h
gthr-solaris.h gbl-ctors.h: Fix formatting. 2002-06-04 11:30:46 +00:00
gthr-vxworks.h
gthr-win32.h gthr-win32.h: Wrap all functions in extern "C". 2002-06-11 05:25:44 +00:00
gthr.h gbl-ctors.h: Fix formatting. 2002-06-04 11:30:46 +00:00
haifa-sched.c i386.md (shift patterns): Use (TARGET_SHIFT1 || optimize_size) to decide whether emit the short opcode. 2002-06-12 14:51:09 +00:00
hard-reg-set.h
hashtable.c
hashtable.h Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
hooks.c re PR preprocessor/6517 (gcc hangs on C compile with multiple "-I-") 2002-05-22 05:40:22 +00:00
hooks.h re PR preprocessor/6517 (gcc hangs on C compile with multiple "-I-") 2002-05-22 05:40:22 +00:00
hwint.h
ifcvt.c Mon Jun 10 20:42:34 CEST 2002 Jan Hubicka <jh@suse.cz> 2002-06-20 17:51:06 +00:00
input.h c-lex.c (indent_level): Remove. 2002-05-23 12:05:38 +00:00
insn-addr.h Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
integrate.c function.h (struct emit_status): Clarify potential contents of regno_reg_rtx array. 2002-06-23 09:57:53 -06:00
integrate.h Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
intl.c
intl.h
jump.c Delete SEQUENCE rtl usage outside of reorg and ssa passes. 2002-06-11 05:22:48 -07:00
langhooks-def.h c-common.c (c_common_post_options): Update prototype; don't init backends if preprocessing only. 2002-07-07 22:10:18 +00:00
langhooks.c langhooks.c: Fix formatting. 2002-05-30 20:55:11 +00:00
langhooks.h c-common.c (c_common_post_options): Update prototype; don't init backends if preprocessing only. 2002-07-07 22:10:18 +00:00
LANGUAGES
lcm.c Delete SEQUENCE rtl usage outside of reorg and ssa passes. 2002-06-11 05:22:48 -07:00
libfuncs.h Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
libgcc2.c * libgcc2.c: Do not include symcat.h or machmode.h. 2002-06-17 15:08:12 -06:00
libgcc2.h
libgcc-std.ver
limitx.h
limity.h
line-map.c
line-map.h
lists.c * lists.c (free_list): Fix typo in comment. 2002-06-08 14:10:01 +00:00
local-alloc.c langhooks.c: Fix formatting. 2002-05-30 20:55:11 +00:00
location.h diagnostic.h: #include location.h 2002-07-10 10:36:27 +00:00
longlong.h longlong.h (count_trailing_zeros): Add missing \, and clean up whitespace in __ns32000__ case. 2002-05-31 02:38:38 +00:00
loop.c loop.c (check_final_value): Use v->always_executed instead of v->always_computable. 2002-06-14 18:10:49 -07:00
loop.h langhooks.c: Fix formatting. 2002-05-30 20:55:11 +00:00
machmode.def Makefile.in (MACHMODE_H): Add @extra_modes_file@. 2002-06-10 22:35:56 +00:00
machmode.h
main.c
Makefile.in [multiple changes] 2002-07-15 14:07:06 +00:00
mbchar.c
mbchar.h
mips-tdump.c
mips-tfile.c
mkconfig.sh Makefile.in (tm_defines): New configuration variable. 2002-06-15 17:31:32 +00:00
mkdeps.c
mkdeps.h
mkheaders.in Makefile.in (INSTALL_HEADERS): Add 'install-mkheaders'. 2002-05-27 04:24:54 +00:00
mkinstalldirs
mklibgcc.in Makefile.in: Replace HOST_PREFIX... 2002-05-31 16:11:49 -04:00
mkmap-flat.awk
mkmap-symver.awk
move-if-change
ONEWS
optabs.c Revert all patches for optimization of Complex .op. 2002-07-10 21:13:26 +00:00
optabs.h Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
output.h Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
params.c params.c: Fix formatting. 2002-05-20 18:06:55 +00:00
params.def Makefile.in (tracer.o): New. 2002-06-01 21:31:42 +00:00
params.h params.c: Fix formatting. 2002-05-20 18:06:55 +00:00
predict.c Mon Jun 10 20:42:34 CEST 2002 Jan Hubicka <jh@suse.cz> 2002-06-20 17:51:06 +00:00
predict.def
predict.h
prefix.c params.c: Fix formatting. 2002-05-20 18:06:55 +00:00
prefix.h
print-rtl.c print-rtl.c (print_rtx): Adjust NOTE argument numbers for 2002-06-02 change. 2002-06-18 13:12:13 -07:00
print-tree.c tree.h: Forward-declare struct realvaluetype. 2002-05-28 17:33:14 +00:00
profile.c Delete SEQUENCE rtl usage outside of reorg and ssa passes. 2002-06-11 05:22:48 -07:00
profile.h
protoize.c
ra-build.c [multiple changes] 2002-07-15 14:07:06 +00:00
ra-colorize.c [multiple changes] 2002-07-15 14:07:06 +00:00
ra-debug.c [multiple changes] 2002-07-15 14:07:06 +00:00
ra-rewrite.c [multiple changes] 2002-07-15 14:07:06 +00:00
ra.c [multiple changes] 2002-07-15 14:07:06 +00:00
ra.h [multiple changes] 2002-07-15 14:07:06 +00:00
read-rtl.c genautomata.c: Don't include ctype.h or limits.h. 2002-06-09 02:12:21 +00:00
README-fixinc
README.Portability * README.Portability: Fix typos. 2002-07-02 09:45:42 +09:30
real.c tree.h: Forward-declare struct realvaluetype. 2002-05-28 17:33:14 +00:00
real.h Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
recog.c Prevent creation of paradoxical FLOAT_MODE subregs 2002-06-28 15:43:54 +00:00
recog.h
reg-stack.c complex-6.c: New. 2002-06-23 07:30:14 +02:00
regclass.c [multiple changes] 2002-07-15 14:07:06 +00:00
regmove.c re PR middle-end/7153 (bad operands for 'movsbl' error) 2002-07-15 16:59:02 -07:00
regrename.c basic-block.h (last_basic_block): Defined as synonym for n_basic_blocks. 2002-05-27 13:45:44 +00:00
regs.h
reload1.c [multiple changes] 2002-07-15 14:07:06 +00:00
reload.c pass MEM reference to find_reloads_address 2002-06-13 21:41:53 -04:00
reload.h
reorg.c re PR target/7042 (cris-elf miscompiles line_hints in ghostscript - "return" delay slot bug) 2002-06-16 18:54:43 +00:00
resource.c basic-block.h (last_basic_block): Defined as synonym for n_basic_blocks. 2002-05-27 13:45:44 +00:00
resource.h
rtl-error.c toplev.h (report_error_function): Remove. 2002-06-05 19:35:45 +00:00
rtl.c Tue Jun 4 19:29:42 CEST 2002 Jan Hubicka <jh@suse.cz> 2002-06-04 17:32:59 +00:00
rtl.def rtl.def (DEFINE_AUTOMATON): Add description of new options time' and v'. 2002-06-18 16:18:23 +00:00
rtl.h rtl.h (gen_rtx_CONST_VECTOR): Declare. 2002-07-11 11:32:54 +01:00
rtlanal.c * rtlanal.c (volatile_refs_p): Not automatically true for CALL. 2002-06-02 00:41:59 -07:00
sbitmap.c [multiple changes] 2002-07-15 14:07:06 +00:00
sbitmap.h [multiple changes] 2002-07-15 14:07:06 +00:00
scan-decls.c
scan-types.sh
scan.c
scan.h
sched-deps.c rtl.h (SCHED_GROUP_P): Disallow CODE_LABEL, BARRIER and NOTE. 2002-06-14 18:58:10 +00:00
sched-ebb.c sched-ebb.c (init_ready_list): Check INSN_P first. 2002-06-17 17:16:37 +00:00
sched-int.h sched-int.h (struct deps): New field libcall_block_tail_insn. 2002-06-04 11:46:14 -06:00
sched-rgn.c Mon Jun 10 20:42:34 CEST 2002 Jan Hubicka <jh@suse.cz> 2002-06-20 17:51:06 +00:00
sched-vis.c Delete SEQUENCE rtl usage outside of reorg and ssa passes. 2002-06-11 05:22:48 -07:00
sdbout.c Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
sdbout.h
SERVICE
sibcall.c Delete SEQUENCE rtl usage outside of reorg and ssa passes. 2002-06-11 05:22:48 -07:00
simplify-rtx.c simplify-rtx.c (simplify_subreg): Handle floating point CONST_DOUBLEs. 2002-07-12 00:53:01 +01:00
sort-protos
ssa-ccp.c i386.md (shift patterns): Use (TARGET_SHIFT1 || optimize_size) to decide whether emit the short opcode. 2002-06-12 14:51:09 +00:00
ssa-dce.c Mon Jun 10 20:42:34 CEST 2002 Jan Hubicka <jh@suse.cz> 2002-06-20 17:51:06 +00:00
ssa.c Mon Jun 10 20:42:34 CEST 2002 Jan Hubicka <jh@suse.cz> 2002-06-20 17:51:06 +00:00
ssa.h Mon Jun 10 20:42:34 CEST 2002 Jan Hubicka <jh@suse.cz> 2002-06-20 17:51:06 +00:00
stab.def
stack.h
stmt.c Delete SEQUENCE rtl usage outside of reorg and ssa passes. 2002-06-11 05:22:48 -07:00
stor-layout.c tm.texi (MEMBER_TYPE_FORCES_BLK): Document MODE argument. 2002-06-15 09:41:13 +00:00
stringpool.c Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
sys-protos.h
sys-types.h
system.h Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
target-def.h c-common.h (enum rid): Add RID_THREAD. 2002-05-21 18:11:29 -07:00
target.h target.h: Fix formatting. 2002-05-31 22:15:42 +00:00
timevar.c
timevar.def Makefile.in (tracer.o): New. 2002-06-01 21:31:42 +00:00
timevar.h target.h: Fix formatting. 2002-05-31 22:15:42 +00:00
tlink.c Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
toplev.c [multiple changes] 2002-07-15 14:07:06 +00:00
toplev.h toplev.h (report_error_function): Remove. 2002-06-05 19:35:45 +00:00
tracer.c toplev.c (set_fast_math_flags): Don't use ISO C style function definitions. 2002-07-06 15:39:46 +02:00
tree-dump.c
tree-dump.h target.h: Fix formatting. 2002-05-31 22:15:42 +00:00
tree-inline.c tree-inline.c (expand_call_inline): Don' mess with _DECL fields. 2002-06-13 15:32:40 +00:00
tree-inline.h target.h: Fix formatting. 2002-05-31 22:15:42 +00:00
tree.c tree.c (build_function_type_list): Update function comment. 2002-07-01 18:40:24 +00:00
tree.def tree.def: Fix typos. 2002-05-25 20:18:41 +00:00
tree.h diagnostic.h: #include location.h 2002-07-10 10:36:27 +00:00
tsystem.h
typeclass.h
unroll.c * unroll.c (loop_iterations): Handle EQ loops. 2002-06-30 14:36:01 +09:30
unwind-dw2-fde-glibc.c target.h: Fix formatting. 2002-05-31 22:15:42 +00:00
unwind-dw2-fde.c target.h: Fix formatting. 2002-05-31 22:15:42 +00:00
unwind-dw2-fde.h target.h: Fix formatting. 2002-05-31 22:15:42 +00:00
unwind-dw2.c target.h: Fix formatting. 2002-05-31 22:15:42 +00:00
unwind-pe.h
unwind-sjlj.c target.h: Fix formatting. 2002-05-31 22:15:42 +00:00
unwind.h target.h: Fix formatting. 2002-05-31 22:15:42 +00:00
unwind.inc
varasm.c * varasm.c: Include real.h before output.h. 2002-06-26 15:16:01 +00:00
varray.c Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
varray.h Merge from pch-branch up to tag pch-commit-20020603. 2002-06-04 07:11:05 +00:00
version.c Daily bump. 2002-07-15 07:16:52 +00:00
version.h
vmsdbg.h target.h: Fix formatting. 2002-05-31 22:15:42 +00:00
vmsdbgout.c function.h (struct function): Rename profile_label_no. 2002-06-17 10:47:22 -07:00
xcoffout.c
xcoffout.h target.h: Fix formatting. 2002-05-31 22:15:42 +00:00

Copyright (C) 2000 Free Software Foundation, Inc.

This file is intended to contain a few notes about writing C code
within GCC so that it compiles without error on the full range of
compilers GCC needs to be able to compile on.

The problem is that many ISO-standard constructs are not accepted by
either old or buggy compilers, and we keep getting bitten by them.
This knowledge until know has been sparsely spread around, so I
thought I'd collect it in one useful place.  Please add and correct
any problems as you come across them.

I'm going to start from a base of the ISO C89 standard, since that is
probably what most people code to naturally.  Obviously using
constructs introduced after that is not a good idea.

The first section of this file deals strictly with portability issues,
the second with common coding pitfalls.


			Portability Issues
			==================

Unary +
-------

K+R C compilers and preprocessors have no notion of unary '+'.  Thus
the following code snippet contains 2 portability problems.

int x = +2;  /* int x = 2;  */
#if +1       /* #if 1  */
#endif


Pointers to void
----------------

K+R C compilers did not have a void pointer, and used char * as the
pointer to anything.  The macro PTR is defined as either void * or
char * depending on whether you have a standards compliant compiler or
a K+R one.  Thus

  free ((void *) h->value.expansion);

should be written

  free ((PTR) h->value.expansion);

Further, an initial investigation indicates that pointers to functions
returning void are okay.  Thus the example given by "Calling functions
through pointers to functions" below appears not to cause a problem.


String literals
---------------

Some SGI compilers choke on the parentheses in:-

const char string[] = ("A string");

This is unfortunate since this is what the GNU gettext macro N_
produces.  You need to find a different way to code it.

K+R C did not allow concatenation of string literals like

  "This is a " "single string literal".

Moreover, some compilers like MSVC++ have fairly low limits on the
maximum length of a string literal; 509 is the lowest we've come
across.  You may need to break up a long printf statement into many
smaller ones.


Empty macro arguments
---------------------

ISO C (6.8.3 in the 1990 standard) specifies the following:

If (before argument substitution) any argument consists of no
preprocessing tokens, the behavior is undefined.

This was relaxed by ISO C99, but some older compilers emit an error,
so code like

#define foo(x, y) x y
foo (bar, )

needs to be coded in some other way.


signed keyword
--------------

The signed keyword did not exist in K+R compilers; it was introduced
in ISO C89, so you cannot use it.  In both K+R and standard C,
unqualified char and bitfields may be signed or unsigned.  There is no
way to portably declare signed chars or signed bitfields.

All other arithmetic types are signed unless you use the 'unsigned'
qualifier.  For instance, it is safe to write

  short paramc;

instead of

  signed short paramc;

If you have an algorithm that depends on signed char or signed
bitfields, you must find another way to write it before it can be
integrated into GCC.


Function prototypes
-------------------

You need to provide a function prototype for every function before you
use it, and functions must be defined K+R style.  The function
prototype should use the PARAMS macro, which takes a single argument.
Therefore the parameter list must be enclosed in parentheses.  For
example,

int myfunc PARAMS ((double, int *));

int
myfunc (var1, var2)
     double var1;
     int *var2;
{
  ...
}

This implies that if the function takes no arguments, it should be
declared and defined as follows:

int myfunc PARAMS ((void));

int
myfunc ()
{
  ...
}

You also need to use PARAMS when referring to function protypes in
other circumstances, for example see "Calling functions through
pointers to functions" below.

Variable-argument functions are best described by example:-

void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...));

void
cpp_ice VPARAMS ((cpp_reader *pfile, const char *msgid, ...))
{
  VA_OPEN (ap, msgid);
  VA_FIXEDARG (ap, cpp_reader *, pfile);
  VA_FIXEDARG (ap, const char *, msgid);

  ...
  VA_CLOSE (ap);
}

See ansidecl.h for the definitions of the above macros and more.

One aspect of using K+R style function declarations, is you cannot
have arguments whose types are char, short, or float, since without
prototypes (ie, K+R rules), these types are promoted to int, int, and
double respectively.

Calling functions through pointers to functions
-----------------------------------------------

K+R C compilers require parentheses around the dereferenced function
pointer expression in the call, whereas ISO C relaxes the syntax.  For
example

typedef void (* cl_directive_handler) PARAMS ((cpp_reader *, const char *));
      *p->handler (pfile, p->arg);

needs to become

      (*p->handler) (pfile, p->arg);


Macros
------

The rules under K+R C and ISO C for achieving stringification and
token pasting are quite different.  Therefore some macros have been
defined which will get it right depending upon the compiler.

  CONCAT2(a,b) CONCAT3(a,b,c) and CONCAT4(a,b,c,d)

will paste the tokens passed as arguments.  You must not leave any
space around the commas.  Also,

  STRINGX(x)

will stringify an argument; to get the same result on K+R and ISO
compilers x should not have spaces around it.


Passing structures by value
---------------------------

Avoid passing structures by value, either to or from functions.  It
seems some K+R compilers handle this differently or not at all.


Enums
-----

In K+R C, you have to cast enum types to use them as integers, and
some compilers in particular give lots of warnings for using an enum
as an array index.


Bitfields
---------

See also "signed keyword" above.  In K+R C only unsigned int bitfields
were defined (i.e. unsigned char, unsigned short, unsigned long.
Using plain int/short/long was not allowed).


free and realloc
----------------

Some implementations crash upon attempts to free or realloc the null
pointer.  Thus if mem might be null, you need to write

  if (mem)
    free (mem);


Reserved Keywords
-----------------

K+R C has "entry" as a reserved keyword, so you should not use it for
your variable names.


Type promotions
---------------

K+R used unsigned-preserving rules for arithmetic expresssions, while
ISO uses value-preserving.  This means an unsigned char compared to an
int is done as an unsigned comparison in K+R (since unsigned char
promotes to unsigned) while it is signed in ISO (since all of the
values in unsigned char fit in an int, it promotes to int).

Trigraphs
---------

You weren't going to use them anyway, but trigraphs were not defined
in K+R C, and some otherwise ISO C compliant compilers do not accept
them.


Suffixes on Integer Constants
-----------------------------

K+R C did not accept a 'u' suffix on integer constants.  If you want
to declare a constant to be be unsigned, you must use an explicit
cast.

You should never use a 'l' suffix on integer constants ('L' is fine),
since it can easily be confused with the number '1'.


			Common Coding Pitfalls
			======================

errno
-----

errno might be declared as a macro.


Implicit int
------------

In C, the 'int' keyword can often be omitted from type declarations.
For instance, you can write

  unsigned variable;

as shorthand for

  unsigned int variable;

There are several places where this can cause trouble.  First, suppose
'variable' is a long; then you might think

  (unsigned) variable

would convert it to unsigned long.  It does not.  It converts to
unsigned int.  This mostly causes problems on 64-bit platforms, where
long and int are not the same size.

Second, if you write a function definition with no return type at
all:

  operate (a, b)
       int a, b;
  {
    ...
  }

that function is expected to return int, *not* void.  GCC will warn
about this.  K+R C has no problem with 'void' as a return type, so you
need not worry about that.

Implicit function declarations always have return type int.  So if you
correct the above definition to

  void
  operate (a, b)
       int a, b;
  ...

but operate() is called above its definition, you will get an error
about a "type mismatch with previous implicit declaration".  The cure
is to prototype all functions at the top of the file, or in an
appropriate header.

Char vs unsigned char vs int
----------------------------

In C, unqualified 'char' may be either signed or unsigned; it is the
implementation's choice.  When you are processing 7-bit ASCII, it does
not matter.  But when your program must handle arbitrary binary data,
or fully 8-bit character sets, you have a problem.  The most obvious
issue is if you have a look-up table indexed by characters.

For instance, the character '\341' in ISO Latin 1 is SMALL LETTER A
WITH ACUTE ACCENT.  In the proper locale, isalpha('\341') will be
true.  But if you read '\341' from a file and store it in a plain
char, isalpha(c) may look up character 225, or it may look up
character -31.  And the ctype table has no entry at offset -31, so
your program will crash.  (If you're lucky.)

It is wise to use unsigned char everywhere you possibly can.  This
avoids all these problems.  Unfortunately, the routines in <string.h>
take plain char arguments, so you have to remember to cast them back
and forth - or avoid the use of strxxx() functions, which is probably
a good idea anyway.

Another common mistake is to use either char or unsigned char to
receive the result of getc() or related stdio functions.  They may
return EOF, which is outside the range of values representable by
char.  If you use char, some legal character value may be confused
with EOF, such as '\377' (SMALL LETTER Y WITH UMLAUT, in Latin-1).
The correct choice is int.

A more subtle version of the same mistake might look like this:

  unsigned char pushback[NPUSHBACK];
  int pbidx;
  #define unget(c) (assert(pbidx < NPUSHBACK), pushback[pbidx++] = (c))
  #define get(c) (pbidx ? pushback[--pbidx] : getchar())
  ...
  unget(EOF);

which will mysteriously turn a pushed-back EOF into a SMALL LETTER Y
WITH UMLAUT.


Other common pitfalls
---------------------

o Expecting 'plain' char to be either sign or unsigned extending

o Shifting an item by a negative amount or by greater than or equal to
  the number of bits in a type (expecting shifts by 32 to be sensible
  has caused quite a number of bugs at least in the early days).

o Expecting ints shifted right to be sign extended.

o Modifying the same value twice within one sequence point.

o Host vs. target floating point representation, including emitting NaNs
  and Infinities in a form that the assembler handles.

o qsort being an unstable sort function (unstable in the sense that
  multiple items that sort the same may be sorted in different orders
  by different qsort functions).

o Passing incorrect types to fprintf and friends.

o Adding a function declaration for a module declared in another file to
  a .c file instead of to a .h file.