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view gcc/testsuite/g++.dg/tree-ssa/pr94403.C @ 152:2b5abeee2509
update gcc11
author | anatofuz |
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date | Mon, 25 May 2020 07:50:57 +0900 |
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// PR tree-optimization/94403 // Only test on some 64-bit targets which do have bswap{si,di}2 patterns and // are either big or little endian (not pdp endian). // { dg-do compile { target { lp64 && { i?86-*-* x86_64-*-* powerpc*-*-* aarch64*-*-* } } } } // { dg-require-effective-target store_merge } // { dg-options "-O2 -fdump-tree-store-merging -std=c++17" } namespace std { template <typename T> void swap (T& t1, T& t2) { T tmp (t1); t1 = t2; t2 = tmp; } enum class byte : unsigned char {}; } unsigned bswap32 (unsigned int x) { unsigned int y = x; std::byte *bytes = reinterpret_cast<std::byte*> (&y); std::swap (bytes[0], bytes[3]); std::swap (bytes[1], bytes[2]); return y; } unsigned long long bswap64 (unsigned long long x) { unsigned long long y = x; std::byte *bytes = reinterpret_cast<std::byte*> (&y); std::swap (bytes[0], bytes[7]); std::swap (bytes[1], bytes[6]); std::swap (bytes[2], bytes[5]); std::swap (bytes[3], bytes[4]); return y; } /* { dg-final { scan-tree-dump-times "__builtin_bswap64" 1 "store-merging" } } */ /* { dg-final { scan-tree-dump-times "__builtin_bswap32" 1 "store-merging" } } */