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re PR rtl-optimization/66626 (gcc.dg/torture/stackalign/non-local-goto-5.c segfaults w/ -mregparm=3 or -miamcu)

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2015-07-14  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/66626
	* lra-constraints.c (lra_constraints): Prevent equivalence
	substitution for static chain pseudo in functions with nonlocal
	goto.

2015-07-14  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/66626
	* gcc.target/i386/pr66626.c: New.

From-SVN: r225789
This commit is contained in:
Vladimir Makarov 2015-07-14 20:54:00 +00:00 committed by Vladimir Makarov
parent 5fd6ec3e4b
commit 6e5ad0f92c
4 changed files with 45 additions and 1 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2015-07-14 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/66626
* lra-constraints.c (lra_constraints): Prevent equivalence
substitution for static chain pseudo in functions with nonlocal
goto.
2015-07-14 Sandra Loosemore <sandra@codesourcery.com>
* config/nios2/nios2.c (TEMP_REG_NUM): Move define up in file.

8
gcc/lra-constraints.c
View File

@ -4306,7 +4306,13 @@ lra_constraints (bool first_p)
&& ((CONST_POOL_OK_P (PSEUDO_REGNO_MODE (i), x)
&& (targetm.preferred_reload_class
(x, lra_get_allocno_class (i)) == NO_REGS))
|| contains_symbol_ref_p (x))))
|| contains_symbol_ref_p (x)))
/* Static chain equivalence may contain eliminable
regs and the result of elimination might be wrong
after restoring frame pointer for a nonlocal
goto. */
|| (cfun->static_chain_decl && crtl->has_nonlocal_goto
&& REG_EXPR (reg) == cfun->static_chain_decl))
ira_reg_equiv[i].defined_p = false;
if (contains_reg_p (x, false, true))
ira_reg_equiv[i].profitable_p = false;

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2015-07-14 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/66626
* gcc.target/i386/pr66626.c: New.
2015-07-14 Sandra Loosemore <sandra@codesourcery.com>
* gcc.target/nios2/nios2-stack-check-1.c: Adjust patterns.

26
gcc/testsuite/gcc.target/i386/pr66626.c Normal file
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@ -0,0 +1,26 @@
/* { dg-do run } */
/* { dg-options "-O2 -mregparm=3" } */
/* { dg-require-effective-target ia32 } */
extern void abort (void);
int s (int i, int j, int k, int l)
{
__label__ l1;
int f (int i, int j, int k, int l)
{
if (i + j + k + l == 10)
goto l1;
return 0;
}
return f (i, j, k, l);
l1:;
return 1;
}
int main ()
{
if (s (1, 2, 3, 4) != 1)
abort ();
return 0;
}