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Patches from David Mosberger, and a patch to make bootstrap work. 

* config/ia64/ia64.c (ia64_encode_section_info): Add check for
	TREE_ASM_WRITTEN.
	* config/ia64/ia64.c (ia64_override_options): Force -mconstant-gp
	if -mauto-pic is on.
	...

From-SVN: r33638
This commit is contained in:
Jim Wilson 2000-05-03 11:46:05 -07:00
parent 3ec83fc2ae
commit 59da9a7d5c
6 changed files with 152 additions and 17 deletions
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34
gcc/ChangeLog
View File

@ -1,3 +1,37 @@
Wed May 3 11:43:53 2000 Jim Wilson <wilson@cygnus.com>
* config/ia64/ia64.c (ia64_encode_section_info): Add check for
TREE_ASM_WRITTEN.
2000-05-03 David Mosberger <davidm@hpl.hp.com>
* config/ia64/ia64.c (ia64_override_options): Force -mconstant-gp
if -mauto-pic is on.
(ia64_epilogue_uses): Mark "gp" (r1) as used by the epilogue if
-mconstant-gp is in effect and function-descriptors are being used
to make indirect calls.
* config/ia64/ia64.h (MASK_CONST_GP): New macro.
(MASK_AUTO_PIC): Ditto.
(TARGET_CONST_GP): Ditto.
(TARGET_AUTO_PIC): Ditto.
(TARGET_SWITCHES): Add -mconstant-gp and -mauto-pic options.
(ASM_OUTPUT_DOUBLE_INT): Don't generate @fptr() if -mauto-pic or
-mno-pic is in effect.
(ASM_OUTPUT_XDATA_DOUBLE_INT): Ditto.
* config/ia64/ia64.md (movdi): Use gen_load_gprel64() if
-mauto-pic is in effect.
(gprel64_offset): New pattern.
(load_gprel64): Ditto.
(call): Handle -mauto-pic like -mno-pic (don't use fptr). If
-mconstant-gp is in effect, no need to preserve gp around direct
calls.
(call_value): Ditto.
* config/ia64/linux.h (PROFILE_BEFORE_PROLOGUE): Define.
(FUNCTION_PROFILER): Define.
* config/ia64/sysv4.h (ASM_OUTPUT_CONSTRUCTOR): Don't generate
@fptr() directive when -mno-pic or -mauto-pic is in effect.
(ASM_OUTPUT_DESTRUCTOR): Ditto.
2000-05-03 Richard Henderson <rth@cygnus.com>
* Makefile.in (STAGESTUFF): Add libgcc libgcc.mk.

19
gcc/config/ia64/ia64.c
View File

@ -2057,6 +2057,9 @@ ia64_mark_machine_status (p)
void
ia64_override_options ()
{
if (TARGET_AUTO_PIC)
target_flags |= MASK_CONST_GP;
if (ia64_fixed_range_string)
fix_range (ia64_fixed_range_string);
@ -2707,6 +2710,14 @@ int
ia64_epilogue_uses (regno)
int regno;
{
/* When a function makes a call through a function descriptor, we
will write a (potentially) new value to "gp". After returning
from such a call, we need to make sure the function restores the
original gp-value, even if the function itself does not use the
gp anymore. */
if (regno == R_GR(1) && TARGET_CONST_GP && !(TARGET_AUTO_PIC || TARGET_NO_PIC))
return 1;
/* For functions defined with the syscall_linkage attribute, all input
registers are marked as live at all function exits. This prevents the
register allocator from using the input registers, which in turn makes it
@ -2812,6 +2823,14 @@ ia64_encode_section_info (decl)
|| ! strcmp (str, "__DTOR_END__"))
;
/* If the variable has already been defined in the output file, then it
is too late to put it in sdata if it wasn't put there in the first
place. The test is here rather than above, because if it is already
in sdata, then it can stay there. */
else if (TREE_ASM_WRITTEN (decl))
;
/* If this is an incomplete type with size 0, then we can't put it in
sdata because it might be too big when completed. */
else if (size > 0 && size <= ia64_section_threshold

32
gcc/config/ia64/ia64.h
View File

@ -66,6 +66,10 @@ extern int target_flags;
#define MASK_NO_SDATA 0x00000080 /* Disable sdata/scommon/sbss. */
#define MASK_CONST_GP 0x00000100 /* treat gp as program-wide constant */
#define MASK_AUTO_PIC 0x00000200 /* generate automatically PIC */
#define MASK_DWARF2_ASM 0x40000000 /* test dwarf2 line info via gas. */
#define TARGET_BIG_ENDIAN (target_flags & MASK_BIG_ENDIAN)
@ -84,13 +88,17 @@ extern int target_flags;
#define TARGET_NO_SDATA (target_flags & MASK_NO_SDATA)
#define TARGET_CONST_GP (target_flags & MASK_CONST_GP)
#define TARGET_AUTO_PIC (target_flags & MASK_AUTO_PIC)
#define TARGET_DWARF2_ASM (target_flags & MASK_DWARF2_ASM)
/* This macro defines names of command options to set and clear bits in
`target_flags'. Its definition is an initializer with a subgrouping for
each command option. */
#define TARGET_SWITCHES \
#define TARGET_SWITCHES \
{ \
{ "big-endian", MASK_BIG_ENDIAN, \
"Generate big endian code" }, \
@ -118,6 +126,10 @@ extern int target_flags;
"Disable use of sdata/scommon/sbss"}, \
{ "sdata", -MASK_NO_SDATA, \
"Enable use of sdata/scommon/sbss"}, \
{ "constant-gp", MASK_CONST_GP, \
"gp is constant (but save/restore gp on indirect calls)" }, \
{ "auto-pic", MASK_AUTO_PIC, \
"Generate self-relocatable code" }, \
{ "dwarf2-asm", MASK_DWARF2_ASM, \
"Enable Dwarf 2 line debug info via GNU as"}, \
{ "no-dwarf2-asm", -MASK_DWARF2_ASM, \
@ -2116,10 +2128,10 @@ do { \
#define ASM_OUTPUT_DOUBLE_INT(FILE, VALUE) \
do { \
fprintf (FILE, "\tdata8\t"); \
if (SYMBOL_REF_FLAG (VALUE)) \
if (!(TARGET_NO_PIC || TARGET_AUTO_PIC) && SYMBOL_REF_FLAG (VALUE)) \
fprintf (FILE, "@fptr("); \
output_addr_const (FILE, (VALUE)); \
if (SYMBOL_REF_FLAG (VALUE)) \
if (!(TARGET_NO_PIC || TARGET_AUTO_PIC) && SYMBOL_REF_FLAG (VALUE)) \
fprintf (FILE, ")"); \
fprintf (FILE, "\n"); \
} while (0)
@ -2161,16 +2173,16 @@ do { \
#define ASM_OUTPUT_XDATA_DOUBLE_INT(FILE, SECTION, VALUE) \
do { \
int need_closing_paren = 0; \
fprintf (FILE, "\t.xdata8\t\"%s\", ", SECTION); \
if (GET_CODE (VALUE) == SYMBOL_REF) \
if (!(TARGET_NO_PIC || TARGET_AUTO_PIC) \
&& GET_CODE (VALUE) == SYMBOL_REF) \
{ \
if (SYMBOL_REF_FLAG (VALUE)) \
fprintf (FILE, "@fptr("); \
else \
fprintf (FILE, "@segrel("); \
fprintf (FILE, SYMBOL_REF_FLAG (VALUE) ? "@fptr(" : "@segrel("); \
need_closing_paren = 1; \
} \
output_addr_const (FILE, (VALUE)); \
if (GET_CODE (VALUE) == SYMBOL_REF) \
output_addr_const (FILE, VALUE); \
if (need_closing_paren) \
fprintf (FILE, ")"); \
fprintf (FILE, "\n"); \
} while (0)

35
gcc/config/ia64/ia64.md
View File

@ -229,7 +229,10 @@
else
temp = operands[0];
if (GET_CODE (operands[1]) == SYMBOL_REF && SYMBOL_REF_FLAG (operands[1]))
if (TARGET_AUTO_PIC)
emit_insn (gen_load_gprel64 (temp, operands[1]));
else if (GET_CODE (operands[1]) == SYMBOL_REF
&& SYMBOL_REF_FLAG (operands[1]))
emit_insn (gen_load_fptr (temp, operands[1]));
else if (sdata_symbolic_operand (operands[1], DImode))
emit_insn (gen_load_gprel (temp, operands[1]));
@ -296,6 +299,26 @@
"addl %0 = @gprel(%1), gp"
[(set_attr "type" "A")])
(define_insn "gprel64_offset"
[(set (match_operand:DI 0 "register_operand" "=r")
(minus:DI (match_operand:DI 1 "symbolic_operand" "") (reg:DI 1)))]
""
"movl %0 = @gprel(%1)"
[(set_attr "type" "L")])
(define_expand "load_gprel64"
[(set (match_dup 2)
(minus:DI (match_operand:DI 1 "symbolic_operand" "") (reg:DI 1)))
(set (match_operand:DI 0 "register_operand" "")
(plus:DI (reg:DI 1) (match_dup 2)))]
""
"{
if (reload_in_progress)
operands[2] = operands[0];
else
operands[2] = gen_reg_rtx (DImode);
}")
(define_expand "load_symptr"
[(set (match_dup 2)
(plus:DI (reg:DI 1) (match_operand:DI 1 "symbolic_operand" "")))
@ -2521,13 +2544,16 @@
rtx addr = XEXP (operands[0], 0);
enum machine_mode mode = GET_MODE (addr);
if (TARGET_NO_PIC)
if (TARGET_NO_PIC || TARGET_AUTO_PIC)
emit_call_insn (gen_call_internal (addr, operands[1],
gen_rtx_REG (DImode, R_BR (0))));
/* If this is an indirect call, then we have the address of a descriptor. */
else if (! symbolic_operand (addr, mode))
emit_insn (gen_indirect_call_pic (addr, operands[1]));
else if (TARGET_CONST_GP)
emit_call_insn (gen_call_internal (addr, operands[1],
gen_rtx_REG (DImode, R_BR (0))));
/* ??? This is an unsatisfying solution. Should rethink. */
else if (setjmp_operand (addr, mode))
emit_insn (gen_setjmp_call_pic (addr, operands[1]));
@ -2631,7 +2657,7 @@
rtx addr = XEXP (operands[1], 0);
enum machine_mode mode = GET_MODE (addr);
if (TARGET_NO_PIC)
if (TARGET_NO_PIC || TARGET_AUTO_PIC)
emit_call_insn (gen_call_value_internal (operands[0], addr, operands[2],
gen_rtx_REG (DImode, R_BR (0))));
@ -2646,6 +2672,9 @@
emit_insn (gen_indirect_call_value_pic (operands[0], addr,
operands[2]));
}
else if (TARGET_CONST_GP)
emit_call_insn (gen_call_value_internal (operands[0], addr, operands[2],
gen_rtx_REG (DImode, R_BR (0))));
/* ??? This is an unsatisfying solution. Should rethink. */
else if (setjmp_operand (addr, mode))
emit_insn (gen_setjmp_call_value_pic (operands[0], addr, operands[2]));

29
gcc/config/ia64/linux.h
View File

@ -26,4 +26,33 @@
#define DONT_USE_BUILTIN_SETJMP
#define JMP_BUF_SIZE (8 * 76)
/* Output any profiling code before the prologue. */
#undef PROFILE_BEFORE_PROLOGUE
#define PROFILE_BEFORE_PROLOGUE 1
/* A C statement or compound statement to output to FILE some assembler code to
call the profiling subroutine `mcount'. */
#undef FUNCTION_PROFILER
#define FUNCTION_PROFILER(FILE, LABELNO) \
do { \
char buf[20]; \
ASM_GENERATE_INTERNAL_LABEL (buf, "LP", LABELNO); \
fputs ("\talloc out0 = ar.pfs, 8, 0, 4, 0\n", FILE); \
if (TARGET_AUTO_PIC) \
fputs ("\tmovl out3 = @gprel(", FILE); \
else \
fputs ("\taddl out3 = @ltoff(", FILE); \
assemble_name (FILE, buf); \
if (TARGET_AUTO_PIC) \
fputs (");;\n", FILE); \
else \
fputs ("), r1;;\n", FILE); \
fputs ("\tmov out1 = r1\n", FILE); \
fputs ("\tmov out2 = b0\n", FILE); \
fputs ("\tbr.call.sptk.many b0 = _mcount;;\n", FILE); \
} while (0)
/* End of linux.h */

20
gcc/config/ia64/sysv4.h
View File

@ -84,9 +84,15 @@ while (0)
#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
do { \
ctors_section (); \
fputs ("\tdata8\t @fptr(", FILE); \
if (TARGET_NO_PIC || TARGET_AUTO_PIC) \
fputs ("\tdata8\t ", FILE); \
else \
fputs ("\tdata8\t @fptr(", FILE); \
assemble_name (FILE, NAME); \
fputs (")\n", FILE); \
if (TARGET_NO_PIC || TARGET_AUTO_PIC) \
fputs ("\n", FILE); \
else \
fputs (")\n", FILE); \
} while (0)
/* A C statement (sans semicolon) to output an element in the table of
@ -96,9 +102,15 @@ while (0)
#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
do { \
dtors_section (); \
fputs ("\tdata8\t @fptr(", FILE); \
if (TARGET_NO_PIC || TARGET_AUTO_PIC) \
fputs ("\tdata8\t ", FILE); \
else \
fputs ("\tdata8\t @fptr(", FILE); \
assemble_name (FILE, NAME); \
fputs (")\n", FILE); \
if (TARGET_NO_PIC || TARGET_AUTO_PIC) \
fputs ("\n", FILE); \
else \
fputs (")\n", FILE); \
} while (0)
/* svr4.h undefines this, so we need to define it here. */