Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/builtin-bswap-7a.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
---|---|
date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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/* { dg-do compile { target arm*-*-* alpha*-*-* ia64*-*-* i?86-*-* x86_64-*-* s390x-*-* powerpc*-*-* rs6000-*-* } } */ /* { dg-require-effective-target stdint_types } */ /* { dg-require-effective-target lp64 } */ /* { dg-options "-O2 -fdump-rtl-combine" } */ /* The test is similiar to builtin-bswap-7.c but returns 1/2 instead of 0/1 to prevent GCC from calculating the return value with arithmetic instead of a comparison. This requires the optimization level to be bumped up to -O2 at least for x86_64. */ #include <stdint.h> #define BS(X) __builtin_bswap64(X) int foo1 (uint64_t a) { if (BS (a) == 0xA00000000) return 1; return 2; } int foo2 (uint64_t a) { if (BS (a) != 0xA00000000) return 1; return 2; } int foo3 (uint64_t a, uint64_t b) { if (BS (a) == BS (b)) return 1; return 2; } int foo4 (uint64_t a, uint64_t b) { if (BS (a) != BS (b)) return 1; return 2; } /* { dg-final { scan-rtl-dump-not "bswapdi" "combine" } } */