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re PR target/67265 ([x86] 'asm' operand has impossible constraints with -fstack-check) 

PR target/67265
	* ira.c (ira_setup_eliminable_regset): Do not necessarily create the
	frame pointer for stack checking if non-call exceptions aren't used.
	* config/i386/i386.c (ix86_finalize_stack_realign_flags): Likewise.

From-SVN: r230168
This commit is contained in:
Eric Botcazou 2015-11-11 14:22:43 +00:00
parent 0bf5130af0
commit 7700cd858f
4 changed files with 32 additions and 7 deletions
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14
gcc/ChangeLog
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@ -1,7 +1,14 @@
2015-11-11 Eric Botcazou <ebotcazou@adacore.com>
PR target/67265
* ira.c (ira_setup_eliminable_regset): Do not necessarily create the
frame pointer for stack checking if non-call exceptions aren't used.
* config/i386/i386.c (ix86_finalize_stack_realign_flags): Likewise.
2015-11-11 Segher Boessenkool <segher@kernel.crashing.org>
* gcc/simplify-rtx.c (simplify_truncation): Simplify TRUNCATE
of AND of [LA]SHIFTRT.
* simplify-rtx.c (simplify_truncation): Simplify TRUNCATE of AND of
[LA]SHIFTRT.
2015-11-11 Martin Liska <mliska@suse.cz>
Richard Biener <rguenther@suse.de>
@ -93,8 +100,7 @@
2015-11-11 Julia Koval <julia.koval@intel.com>
* config/i386/i386.c: Handle "skylake" and
"skylake-avx512".
* config/i386/i386.c: Handle "skylake" and "skylake-avx512".
2015-11-11 Martin Liska <mliska@suse.cz>

9
gcc/ira.c
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@ -2259,9 +2259,12 @@ ira_setup_eliminable_regset (void)
frame_pointer_needed
= (! flag_omit_frame_pointer
|| (cfun->calls_alloca && EXIT_IGNORE_STACK)
/* We need the frame pointer to catch stack overflow exceptions
if the stack pointer is moving. */
|| (flag_stack_check && STACK_CHECK_MOVING_SP)
/* We need the frame pointer to catch stack overflow exceptions if
the stack pointer is moving (as for the alloca case just above). */
|| (STACK_CHECK_MOVING_SP
&& flag_stack_check
&& flag_exceptions
&& cfun->can_throw_non_call_exceptions)
|| crtl->accesses_prior_frames
|| (SUPPORTS_STACK_ALIGNMENT && crtl->stack_realign_needed)
/* We need a frame pointer for all Cilk Plus functions that use

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2015-11-11 Eric Botcazou <ebotcazou@adacore.com>
* gcc.target/i386/pr67265.c: New test.
2015-11-11 Segher Boessenkool <segher@kernel.crashing.org>
* gcc.target/powerpc/20050603-3.c: Don't restrict to ilp32. Do more

12
gcc/testsuite/gcc.target/i386/pr67265.c Normal file
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@ -0,0 +1,12 @@
/* PR target/67265 */
/* Reduced testcase by Johannes Dewender <gnu@JonnyJD.net> */
/* { dg-do compile } */
/* { dg-options "-O -fstack-check -fPIC" } */
int a, b, c, d, e;
void foo (void)
{
__asm__("" : "+r"(c), "+r"(e), "+r"(d), "+r"(a) : ""(b), "mg"(foo), "mm"(c));
}