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sparc.h (sparc_compare_emitted): New extern.

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* config/sparc/sparc.h (sparc_compare_emitted): New extern.
	* config/sparc/sparc.c (sparc_compare_emitted): New variable.
	(gen_compare_reg): If sparc_compare_emitted is set, clear it
	and return its previous value.
	(emit_v9_brxx_insn): Assert sparc_compare_emitted is NULL.
	* config/sparc/sparc.md (UNSPEC_SP_SET, UNSPEC_SP_TEST): New
	constants.
	(stack_protect_set, stack_protect_test): New expanders.
	(stack_protect_setsi, stack_protect_setdi, stack_protect_testsi,
	stack_protect_testdi): New insns.
	* config/sparc/linux.h (TARGET_THREAD_SSP_OFFSET): Define.
	* config/sparc/linux64.h (TARGET_THREAD_SSP_OFFSET): Define.

From-SVN: r101653
This commit is contained in:
Jakub Jelinek 2005-07-06 09:49:05 +02:00 committed by Jakub Jelinek
parent 9da4058c14
commit 8ec11fe9b8
6 changed files with 129 additions and 1 deletions
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15
gcc/ChangeLog
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@ -1,3 +1,18 @@
2005-07-06 Jakub Jelinek <jakub@redhat.com>
* config/sparc/sparc.h (sparc_compare_emitted): New extern.
* config/sparc/sparc.c (sparc_compare_emitted): New variable.
(gen_compare_reg): If sparc_compare_emitted is set, clear it
and return its previous value.
(emit_v9_brxx_insn): Assert sparc_compare_emitted is NULL.
* config/sparc/sparc.md (UNSPEC_SP_SET, UNSPEC_SP_TEST): New
constants.
(stack_protect_set, stack_protect_test): New expanders.
(stack_protect_setsi, stack_protect_setdi, stack_protect_testsi,
stack_protect_testdi): New insns.
* config/sparc/linux.h (TARGET_THREAD_SSP_OFFSET): Define.
* config/sparc/linux64.h (TARGET_THREAD_SSP_OFFSET): Define.
2005-07-06 Jeff Law <law@redhat.com>
* tree-ssa-dce.c (cfg_altered): New global.

5
gcc/config/sparc/linux.h
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@ -229,3 +229,8 @@ do { \
#undef NEED_INDICATE_EXEC_STACK
#define NEED_INDICATE_EXEC_STACK 1
#ifdef TARGET_LIBC_PROVIDES_SSP
/* sparc glibc provides __stack_chk_guard in [%g7 + 0x14]. */
#define TARGET_THREAD_SSP_OFFSET 0x14
#endif

6
gcc/config/sparc/linux64.h
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@ -363,3 +363,9 @@ do { \
#undef NEED_INDICATE_EXEC_STACK
#define NEED_INDICATE_EXEC_STACK 1
#ifdef TARGET_LIBC_PROVIDES_SSP
/* sparc glibc provides __stack_chk_guard in [%g7 + 0x14],
sparc64 glibc provides it at [%g7 + 0x28]. */
#define TARGET_THREAD_SSP_OFFSET (TARGET_ARCH64 ? 0x28 : 0x14)
#endif

10
gcc/config/sparc/sparc.c
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@ -232,7 +232,7 @@ static GTY(()) int struct_value_alias_set;
/* Save the operands last given to a compare for use when we
generate a scc or bcc insn. */
rtx sparc_compare_op0, sparc_compare_op1;
rtx sparc_compare_op0, sparc_compare_op1, sparc_compare_emitted;
/* Vector to say how input registers are mapped to output registers.
HARD_FRAME_POINTER_REGNUM cannot be remapped by this function to
@ -1905,6 +1905,13 @@ gen_compare_reg (enum rtx_code code, rtx x, rtx y)
enum machine_mode mode = SELECT_CC_MODE (code, x, y);
rtx cc_reg;
if (sparc_compare_emitted != NULL_RTX)
{
cc_reg = sparc_compare_emitted;
sparc_compare_emitted = NULL_RTX;
return cc_reg;
}
/* ??? We don't have movcc patterns so we cannot generate pseudo regs for the
fcc regs (cse can't tell they're really call clobbered regs and will
remove a duplicate comparison even if there is an intervening function
@ -2071,6 +2078,7 @@ gen_v9_scc (enum rtx_code compare_code, register rtx *operands)
void
emit_v9_brxx_insn (enum rtx_code code, rtx op0, rtx label)
{
gcc_assert (sparc_compare_emitted == NULL_RTX);
emit_jump_insn (gen_rtx_SET (VOIDmode,
pc_rtx,
gen_rtx_IF_THEN_ELSE (VOIDmode,

1
gcc/config/sparc/sparc.h
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@ -1584,6 +1584,7 @@ function_arg_padding ((MODE), (TYPE))
extern GTY(()) rtx sparc_compare_op0;
extern GTY(()) rtx sparc_compare_op1;
extern GTY(()) rtx sparc_compare_emitted;
/* Generate the special assembly code needed to tell the assembler whatever

93
gcc/config/sparc/sparc.md
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@ -57,6 +57,9 @@
(UNSPEC_ALIGNDATA 48)
(UNSPEC_ALIGNADDR 49)
(UNSPEC_PDIST 50)
(UNSPEC_SP_SET 60)
(UNSPEC_SP_TEST 61)
])
(define_constants
@ -8155,6 +8158,96 @@
[(set_attr "type" "store")])
;; Stack protector instructions.
(define_expand "stack_protect_set"
[(match_operand 0 "memory_operand" "")
(match_operand 1 "memory_operand" "")]
""
{
#ifdef TARGET_THREAD_SSP_OFFSET
rtx tlsreg = gen_rtx_REG (Pmode, 7);
rtx addr = gen_rtx_PLUS (Pmode, tlsreg, GEN_INT (TARGET_THREAD_SSP_OFFSET));
operands[1] = gen_rtx_MEM (Pmode, addr);
#endif
if (TARGET_ARCH64)
emit_insn (gen_stack_protect_setdi (operands[0], operands[1]));
else
emit_insn (gen_stack_protect_setsi (operands[0], operands[1]));
DONE;
})
(define_insn "stack_protect_setsi"
[(set (match_operand:SI 0 "memory_operand" "=m")
(unspec:SI [(match_operand:SI 1 "memory_operand" "m")] UNSPEC_SP_SET))
(set (match_scratch:SI 2 "=&r") (const_int 0))]
"TARGET_ARCH32"
"ld\t%1, %2\;st\t%2, %0\;mov\t0, %2"
[(set_attr "type" "multi")
(set_attr "length" "3")])
(define_insn "stack_protect_setdi"
[(set (match_operand:DI 0 "memory_operand" "=m")
(unspec:DI [(match_operand:DI 1 "memory_operand" "m")] UNSPEC_SP_SET))
(set (match_scratch:DI 2 "=&r") (const_int 0))]
"TARGET_ARCH64"
"ldx\t%1, %2\;stx\t%2, %0\;mov\t0, %2"
[(set_attr "type" "multi")
(set_attr "length" "3")])
(define_expand "stack_protect_test"
[(match_operand 0 "memory_operand" "")
(match_operand 1 "memory_operand" "")
(match_operand 2 "" "")]
""
{
#ifdef TARGET_THREAD_SSP_OFFSET
rtx tlsreg = gen_rtx_REG (Pmode, 7);
rtx addr = gen_rtx_PLUS (Pmode, tlsreg, GEN_INT (TARGET_THREAD_SSP_OFFSET));
operands[1] = gen_rtx_MEM (Pmode, addr);
#endif
if (TARGET_ARCH64)
{
rtx temp = gen_reg_rtx (Pmode);
emit_insn (gen_stack_protect_testdi (temp, operands[0], operands[1]));
sparc_compare_op0 = temp;
sparc_compare_op1 = const0_rtx;
}
else
{
emit_insn (gen_stack_protect_testsi (operands[0], operands[1]));
sparc_compare_op0 = operands[0];
sparc_compare_op1 = operands[1];
sparc_compare_emitted = gen_rtx_REG (CCmode, SPARC_ICC_REG);
}
emit_jump_insn (gen_beq (operands[2]));
DONE;
})
(define_insn "stack_protect_testsi"
[(set (reg:CC 100)
(unspec:CC [(match_operand:SI 0 "memory_operand" "m")
(match_operand:SI 1 "memory_operand" "m")]
UNSPEC_SP_TEST))
(clobber (match_scratch:SI 2 "=&r"))
(set (match_scratch:SI 3 "=r") (const_int 0))]
"TARGET_ARCH32"
"ld\t%0, %2\;ld\t%1, %3\;xorcc\t%2, %3, %2\;mov\t0, %3"
[(set_attr "type" "multi")
(set_attr "length" "4")])
(define_insn "stack_protect_testdi"
[(set (match_operand:DI 0 "register_operand" "=&r")
(unspec:DI [(match_operand:DI 1 "memory_operand" "m")
(match_operand:DI 2 "memory_operand" "m")]
UNSPEC_SP_TEST))
(set (match_scratch:DI 3 "=r") (const_int 0))]
"TARGET_ARCH64"
"ldx\t%1, %0\;ldx\t%2, %3\;xor\t%0, %3, %0\;mov\t0, %3"
[(set_attr "type" "multi")
(set_attr "length" "4")])
;; Vector instructions.
(define_insn "addv2si3"