2 // { dg-options "-O2 -std=gnu++11 -fdump-tree-optimized" } */
6 // Return a copy of the underlying memory of an arbitrary value.
9 typename = typename std::enable_if<std::is_trivially_copyable<T>::value>::type
13 ) -> std::array<char, sizeof(T)> {
14 auto ret = std::array<char, sizeof(T)>{};
15 __builtin_memcpy(ret.data(), &value, sizeof(T));
21 typename = typename std::enable_if<std::is_trivially_copyable<T>::value>::type
24 std::array<char, sizeof(T)> const & buf
27 __builtin_memcpy(&ret, buf.data(), sizeof(T));
31 double foo1(std::uint64_t arg) {
32 return fromMem<double>(getMem(arg));
35 double foo2(std::uint64_t arg) {
36 return *reinterpret_cast<double*>(&arg);
39 double foo3(std::uint64_t arg) {
41 __builtin_memcpy(&ret, &arg, sizeof(arg));
45 // { dg-final { scan-tree-dump-not "BIT_FIELD_REF" "optimized" } }