procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

explow.c (compute_stack_clash_protection_loop_data): Use CONST_INT_P instead of explicit test.

Browse source 
* explow.c (compute_stack_clash_protection_loop_data): Use
	CONST_INT_P instead of explicit test.  Verify object is a
	CONST_INT_P before looking at INTVAL.
	(anti_adjust_stack_and_probe_stack_clash): Use CONST_INT_P
	instead of explicit test.

	* gcc.target/i386/stack-check-11.c: Update test and regexp
	so that it works for both i?86 and x86_64.

From-SVN: r253034
This commit is contained in:
Jeff Law 2017-09-20 15:59:50 -06:00 • committed by Jeff Law
parent 6073d0028d
commit 94c23e3960
4 changed files with 26 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
gcc/ChangeLog
View file

@ -1,3 +1,11 @@
2017-09-20 Jeff Law <law@redhat.com>
* explow.c (compute_stack_clash_protection_loop_data): Use
CONST_INT_P instead of explicit test. Verify object is a
CONST_INT_P before looking at INTVAL.
(anti_adjust_stack_and_probe_stack_clash): Use CONST_INT_P
instead of explicit test.
2017-09-20 Segher Boessenkool <segher@kernel.crashing.org>
PR target/77687

11
gcc/explow.c
View file

@ -1834,11 +1834,11 @@ compute_stack_clash_protection_loop_data (rtx *rounded_size, rtx *last_addr,
if (*rounded_size == CONST0_RTX (Pmode))
fprintf (dump_file,
"Stack clash skipped dynamic allocation and probing loop.\n");
else if (GET_CODE (*rounded_size) == CONST_INT
else if (CONST_INT_P (*rounded_size)
&& INTVAL (*rounded_size) <= 4 * *probe_interval)
fprintf (dump_file,
"Stack clash dynamic allocation and probing inline.\n");
else if (GET_CODE (*rounded_size) == CONST_INT)
else if (CONST_INT_P (*rounded_size))
fprintf (dump_file,
"Stack clash dynamic allocation and probing in "
"rotated loop.\n");
@ -1936,7 +1936,8 @@ anti_adjust_stack_and_probe_stack_clash (rtx size)
if (rounded_size != CONST0_RTX (Pmode))
{
if (INTVAL (rounded_size) <= 4 * probe_interval)
if (CONST_INT_P (rounded_size)
&& INTVAL (rounded_size) <= 4 * probe_interval)
{
for (HOST_WIDE_INT i = 0;
i < INTVAL (rounded_size);
@ -1956,7 +1957,7 @@ anti_adjust_stack_and_probe_stack_clash (rtx size)
else
{
rtx loop_lab, end_loop;
bool rotate_loop = GET_CODE (rounded_size) == CONST_INT;
bool rotate_loop = CONST_INT_P (rounded_size);
emit_stack_clash_protection_probe_loop_start (&loop_lab, &end_loop,
last_addr, rotate_loop);
@ -1994,7 +1995,7 @@ anti_adjust_stack_and_probe_stack_clash (rtx size)
might hold live data. So probe at *sp if we know that
an allocation was made, otherwise probe into the red zone
which is obviously undesirable. */
if (GET_CODE (size) == CONST_INT)
if (CONST_INT_P (size))
{
emit_stack_probe (stack_pointer_rtx);
emit_insn (gen_blockage ());

5
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,8 @@
2017-09-20 Jeff Law <law@redhat.com>
* gcc.target/i386/stack-check-11.c: Update test and regexp
so that it works for both i?86 and x86_64.
2017-09-19 Segher Boessenkool <segher@kernel.crashing.org>
PR target/77687

12
gcc/testsuite/gcc.target/i386/stack-check-11.c
View file

@ -2,15 +2,17 @@
/* { dg-options "-O2 -fstack-clash-protection" } */
/* { dg-require-effective-target supports_stack_clash_protection } */
extern void arf (unsigned long int *, unsigned long int *);
#include <stdint.h>
extern void arf (uint64_t *, uint64_t *);
void
frob ()
{
unsigned long int num[859];
unsigned long int den[859];
uint64_t num[859];
uint64_t den[859];
arf (den, num);
}
/* { dg-final { scan-assembler-times "subq" 4 } } */
/* { dg-final { scan-assembler-times "orq" 3 } } */
/* { dg-final { scan-assembler-times "sub\[ql\]" 4 } } */
/* { dg-final { scan-assembler-times "or\[ql\]" 3 } } */