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