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/* PR optimization/11864
* Reporter: Kazumoto Kojima <kkojima@gcc.gnu.org>
* Summary: [3.3/3.4 regression] miscompiles zero extension and test
* Description:
* gcc-3.3/3.4 -O2 for sh target may miscompile the combination of zero extension
* and test if it's zero.
*
* Testcase tweaked by dank@kegel.com. Not marked as xfail because it's a regression.
*/
/* { dg-do run } */
/* { dg-options "-O2" } */
extern void abort(void);
int val = 0xff00;
int f(void)
{
return val;
}
unsigned char a[1];
void foo(void)
{
a[0] = f() & 255;
if (!a[0])
a[0] = f() & 255;
if (!a[0])
a[0] = 1 + (f() & 127);
}
int main(int argc, char **argv)
{
foo();
if (!a[0])
abort();
return 0;
}
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