54 lines
987 B
C
54 lines
987 B
C
/* PR tree-optimization/92860. */
|
|
/* Testcase derived from 20111227-1.c to ensure that REE is combining
|
|
redundant zero extends with zero extend to wider mode. */
|
|
/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
|
|
/* { dg-options "-fdump-rtl-ree" } */
|
|
|
|
extern void abort (void);
|
|
|
|
unsigned short s;
|
|
unsigned int i;
|
|
unsigned long l;
|
|
unsigned char v = -1;
|
|
|
|
void
|
|
__attribute__ ((optimize("-O2")))
|
|
baz()
|
|
{
|
|
}
|
|
|
|
void __attribute__((noinline,noclone))
|
|
bar (int t)
|
|
{
|
|
if (t == 2 && s != 0xff)
|
|
abort ();
|
|
if (t == 1 && i != 0xff)
|
|
abort ();
|
|
if (t == 0 && l != 0xff)
|
|
abort ();
|
|
}
|
|
|
|
void __attribute__((noinline,noclone))
|
|
foo (unsigned char *a, int t)
|
|
{
|
|
unsigned char r = v;
|
|
|
|
if (t == 2)
|
|
s = (unsigned short) r;
|
|
else if (t == 1)
|
|
i = (unsigned int) r;
|
|
else if (t == 0)
|
|
l = (unsigned long) r;
|
|
bar (t);
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
foo (&v, 0);
|
|
foo (&v, 1);
|
|
foo (&v, 2);
|
|
return 0;
|
|
}
|
|
|
|
/* { dg-final { scan-rtl-dump-not "Elimination opportunities" "ree" } } */
|