Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/optimize-bswaphi-1.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
---|---|
date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children | 1830386684a0 |
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/* { dg-do compile } */ /* { dg-require-effective-target bswap } */ /* { dg-require-effective-target stdint_types } */ /* { dg-options "-O2 -fdump-tree-bswap" } */ /* { dg-additional-options "-march=z900" { target s390-*-* } } */ #include <stdint.h> unsigned char data[2]; struct uint16_st { unsigned char u0, u1; }; uint32_t read_le16_1 (void) { return data[0] | (data[1] << 8); } uint32_t read_le16_2 (struct uint16_st data) { return data.u0 | (data.u1 << 8); } uint32_t read_le16_3 (unsigned char *data) { return *data | (*(data + 1) << 8); } uint32_t read_be16_1 (void) { return data[1] | (data[0] << 8); } uint32_t read_be16_2 (struct uint16_st data) { return data.u1 | (data.u0 << 8); } uint32_t read_be16_3 (unsigned char *data) { return *(data + 1) | (*data << 8); } typedef int HItype __attribute__ ((mode (HI))); /* Test that detection of significant sign extension works correctly. This checks that unknown byte markers are set correctly in cast of cast. */ HItype swap16 (HItype in) { return (HItype) (((in >> 0) & 0xFF) << 8) | (((in >> 8) & 0xFF) << 0); } /* { dg-final { scan-tree-dump-times "16 bit load in target endianness found at" 3 "bswap" } } */ /* { dg-final { scan-tree-dump-times "16 bit bswap implementation found at" 4 "bswap" } } */