| // RUN: %clang_cc1 -std=c++1z -Werror -triple i386-unknown-unknown -emit-llvm -O1 -disable-llvm-passes -o - %s | FileCheck %s |
| |
| // std::byte should be considered equivalent to char for aliasing. |
| |
| namespace std { |
| enum byte : unsigned char {}; |
| } |
| |
| // CHECK-LABEL: define void @test0( |
| extern "C" void test0(std::byte *sb, int *i) { |
| // CHECK: store i8 0, i8* %{{.*}} !tbaa [[TAG_CHAR:!.*]] |
| *sb = std::byte{0}; |
| |
| // CHECK: store i32 1, i32* %{{.*}} !tbaa [[TAG_INT:!.*]] |
| *i = 1; |
| } |
| |
| enum byte : unsigned char {}; |
| namespace my { |
| enum byte : unsigned char {}; |
| namespace std { |
| enum byte : unsigned char {}; |
| } // namespace std |
| } // namespace my |
| |
| // Make sure we don't get confused with other enums named 'byte'. |
| |
| // CHECK-LABEL: define void @test1( |
| extern "C" void test1(::byte *b, ::my::byte *mb, ::my::std::byte *msb) { |
| *b = ::byte{0}; |
| *mb = ::my::byte{0}; |
| *msb = ::my::std::byte{0}; |
| // CHECK-NOT: store i8 0, i8* %{{.*}} !tbaa [[TAG_CHAR]] |
| } |
| |
| // CHECK: !"any pointer", [[TYPE_CHAR:!.*]], |
| // CHECK: [[TYPE_CHAR]] = !{!"omnipotent char", [[TAG_CXX_TBAA:!.*]], |
| // CHECK: [[TAG_CXX_TBAA]] = !{!"Simple C++ TBAA"} |
| // CHECK: [[TAG_CHAR]] = !{[[TYPE_CHAR:!.*]], [[TYPE_CHAR]], i64 0} |
| // CHECK: [[TAG_INT]] = !{[[TYPE_INT:!.*]], [[TYPE_INT]], i64 0} |
| // CHECK: [[TYPE_INT]] = !{!"int", [[TYPE_CHAR]] |
