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/* Test whether an AND mask or'ed with the know zero bits that equals a mode
mask is a candidate for zero extendion. */
/* Note: This test requires that char, int and long have different sizes and the
target has a way to do 32 -> 64 bit zero extension other than AND. */
/* { dg-do compile { target i?86-*-* x86_64-*-* s390*-*-* } } */
/* { dg-require-effective-target lp64 } */
/* { dg-options "-O3 -dP" } */
unsigned long foo (unsigned char c)
{
unsigned long l;
unsigned int i;
i = ((unsigned int)c) << 8;
i |= ((unsigned int)c) << 20;
asm volatile ("":::);
i = i & 0x0ff0ff00;
asm volatile ("":::);
l = (unsigned long)i;
return l;
}
unsigned long bar (unsigned char c)
{
unsigned long l;
unsigned int i;
i = ((unsigned int)c) << 8;
i |= ((unsigned int)c) << 20;
asm volatile ("":::);
i = i & 0x0ffffff0;
asm volatile ("":::);
l = (unsigned long)i;
return l;
}
/* Check that no pattern containing an AND expression was used. */
/* { dg-final { scan-assembler-not "\\(and:" } } */
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