42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
/* Test whether an AND mask or'ed with the know zero bits that equals a mode
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mask is a candidate for zero extendion. */
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/* { dg-do compile { target i?86-*-* x86_64-*-* s390*-*-* aarch64*-*-* } } */
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/* { dg-require-effective-target lp64 } */
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/* { dg-options "-O3 -dP -fdump-rtl-combine" } */
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unsigned long foo (unsigned char c)
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{
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unsigned long l;
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unsigned int i;
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i = ((unsigned int)c) << 8;
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i |= ((unsigned int)c) << 20;
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asm volatile ("":::);
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i = i & 0x0fe0fe00;
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asm volatile ("":::);
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l = (unsigned long)i;
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return l;
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}
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unsigned long bar (unsigned char c)
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{
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unsigned long l;
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unsigned int i;
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i = ((unsigned int)c) << 8;
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i |= ((unsigned int)c) << 20;
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asm volatile ("":::);
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i = i & 0x07f007f0;
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asm volatile ("":::);
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l = (unsigned long)i;
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return l;
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}
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/* Check that an AND expression was used. */
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/* { dg-final { scan-assembler-times "\\(and:" 2 { target { ! aarch64*-*-* } } } } */
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/* { dg-final { scan-rtl-dump "\\(and:DI" "combine" { target aarch64*-*-* } } } */
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/* { dg-final { scan-rtl-dump "\\(and:SI" "combine" { target aarch64*-*-* } } } */
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