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re PR rtl-optimization/87485 (Compile time hog w/ -O2 -fschedule-insns -fno-guess-branch-probability -fno-isolate-erroneous-paths-dereference -fno-omit-frame-pointer -fno-split-wide-types -fno-tree-ccp -fno-tree-sra)

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PR rtl-optimization/87485
	* function.c (expand_function_end): Move stack_protect_epilogue
	before loading of return value into hard register(s).

	* gcc.dg/pr87485.c: New test.

From-SVN: r270013
This commit is contained in:
Jakub Jelinek 2019-03-29 12:42:51 +01:00 committed by Jakub Jelinek
parent 34f95cbdc5
commit a6240447c4
4 changed files with 49 additions and 1 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2019-03-29 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/87485
* function.c (expand_function_end): Move stack_protect_epilogue
before loading of return value into hard register(s).
2019-03-28 Jakub Jelinek <jakub@redhat.com>
PR middle-end/89621

10
gcc/function.c
View File

@ -5330,6 +5330,12 @@ expand_function_end (void)
communicate between __builtin_eh_return and the epilogue. */
expand_eh_return ();
/* If stack protection is enabled for this function, check the guard. */
if (crtl->stack_protect_guard
&& targetm.stack_protect_runtime_enabled_p ()
&& naked_return_label == NULL_RTX)
stack_protect_epilogue ();
/* If scalar return value was computed in a pseudo-reg, or was a named
return value that got dumped to the stack, copy that to the hard
return register. */
@ -5476,7 +5482,9 @@ expand_function_end (void)
emit_insn (gen_blockage ());
/* If stack protection is enabled for this function, check the guard. */
if (crtl->stack_protect_guard && targetm.stack_protect_runtime_enabled_p ())
if (crtl->stack_protect_guard
&& targetm.stack_protect_runtime_enabled_p ()
&& naked_return_label)
stack_protect_epilogue ();
/* If we had calls to alloca, and this machine needs

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2019-03-29 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/87485
* gcc.dg/pr87485.c: New test.
2019-03-28 Jakub Jelinek <jakub@redhat.com>
PR middle-end/89621

29
gcc/testsuite/gcc.dg/pr87485.c Normal file
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@ -0,0 +1,29 @@
/* PR rtl-optimization/87485 */
/* { dg-do compile { target int128 } } */
/* { dg-options "-O2 -fschedule-insns -fno-guess-branch-probability -fno-isolate-erroneous-paths-dereference -fno-omit-frame-pointer -fno-split-wide-types -fno-tree-ccp -fno-tree-sra" } */
/* { dg-additional-options "-fstack-protector-strong" { target fstack_protector } } */
int *a;
int
foo (__int128 x, int y, int z)
{
__int128 b;
*a = ((!!y ? y : x) * y | x) * 2;
if (z == 0)
{
unsigned int c = 1;
__int128 *d = &b;
for (*a = 0; *a < 1; *a += y)
;
*a += b < (c / 0); /* { dg-warning "division by zero" } */
goto l;
m:
while (b < 1)
;
++*a;
}
goto m;
l:
return 0;
}