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re PR rtl-optimization/88296 (Infinite loop in lra_split_hard_reg_for)

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PR rtl-optimization/88296
	* gcc.target/i386/pr88296.c: New test.

From-SVN: r267831
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Jakub Jelinek 2019-01-11 11:17:12 +01:00 committed by Jakub Jelinek
parent a8766179a7
commit 6ebf16e63f
2 changed files with 71 additions and 0 deletions
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gcc/testsuite/ChangeLog
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2019-01-11 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/88296
* gcc.target/i386/pr88296.c: New test.
2019-01-11 Paolo Carlini <paolo.carlini@oracle.com>
* g++.dg/diagnostic/extern-initialized.C: New.

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gcc/testsuite/gcc.target/i386/pr88296.c Normal file
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/* PR rtl-optimization/88296 */
/* { dg-do compile { target int128 } } */
/* { dg-options "-O2 -march=core2 -fnon-call-exceptions -fschedule-insns -fselective-scheduling -funroll-all-loops -fno-caller-saves -fno-guess-branch-probability -fno-ivopts -fno-rerun-cse-after-loop -fno-split-wide-types -fno-tree-bit-ccp -fno-tree-coalesce-vars --param max-completely-peeled-insns=13" } */
int a, b, c;
void bar (int, int);
void
foo (__int128 x, unsigned int y, char z)
{
__int128 *d = &x;
unsigned short int e = 0;
unsigned char f = 0;
char g = 1;
(void) d;
bar (0, 0);
while (e < 1)
{
__int128 h = 1;
++c;
e = x;
g /= e;
if (g != 0)
{
int i;
if (g == 0)
i = a;
else
{
++g;
i = g;
}
if (i == 0)
{
a -= b + (!!g ? y : 0);
break;
}
for (g = 0; g < 3; ++g)
{
unsigned char *j = &f;
x /= h;
h /= x;
for (i = 0; i < 2; ++i)
{
z <<= ((!!g && !!c) ? (b + 1) : (1 / *j));
y = ~e;
g &= y;
x |= 1;
b *= i;
++c;
}
f /= b > 1;
e /= f;
x += b << 32; /* { dg-warning "left shift count" } */
}
if (g << g == 0)
{
e *= b + 1;
a = 32;
f += (e << a) + (y && 1);
x = z;
c += x / 3;
}
}
}
}