http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46491
Summary: [4.3/4.4/4.5 Regression] ipa-pure-const.c
miscompilation
Product: gcc
Version: 4.5.2
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: [email protected]
ReportedBy: [email protected]
extern void abort (void);
__attribute__((noinline)) int
foo (int *p)
{
int r;
asm ("movl $6, (%1)\n\txorl %0, %0" : "=r" (r) : "r" (p) : "memory");
return r;
}
int
main (void)
{
int p = 8;
if ((foo (&p) ? : p) != 6)
abort ();
return 0;
}
is miscompiled with -O2 in 4.5 (and with -O2 -fno-ipa-reference in
4.1/4.2/4.3/4.4).
