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re PR target/71554 (Miscompilation of __builtin_mul_overflow on i686)

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PR target/71554
	* gcc.c-torture/execute/pr71554.c: New test.

From-SVN: r237512
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Jakub Jelinek 2016-06-16 12:20:45 +02:00 committed by Jakub Jelinek
parent 36d3d5d3db
commit c577adb24f
3 changed files with 32 additions and 0 deletions
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1
gcc/ChangeLog
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@ -4,6 +4,7 @@
2016-06-16 Jakub Jelinek <jakub@redhat.com>
PR target/71554
* config/i386/i386.md (setcc + movzbl peephole2): Use reg_set_p.
(setcc + and peephole2): Likewise.

3
gcc/testsuite/ChangeLog
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@ -1,5 +1,8 @@
2016-06-16 Jakub Jelinek <jakub@redhat.com>
PR target/71554
* gcc.c-torture/execute/pr71554.c: New test.
PR rtl-optimization/71532
* gcc.dg/torture/pr71532.c: New test.

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gcc/testsuite/gcc.c-torture/execute/pr71554.c Normal file
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/* PR target/71554 */
int v;
__attribute__ ((noinline, noclone)) void
bar (void)
{
v++;
}
__attribute__ ((noinline, noclone))
void
foo (unsigned int x)
{
signed int y = ((-__INT_MAX__ - 1) / 2);
signed int r;
if (__builtin_mul_overflow (x, y, &r))
bar ();
}
int
main ()
{
foo (2);
if (v)
__builtin_abort ();
return 0;
}