1 // RUN: %clang_cc1 -O3 -std=c++2a -S -emit-llvm -o - -disable-llvm-passes -triple x86_64-apple-macos10.14 %s | FileCheck %s
2
test_scalar()3 void test_scalar() {
4 // CHECK-LABEL: define{{.*}} void @_Z11test_scalarv
5 __builtin_bit_cast(float, 42);
6
7 // CHECK: load float, float* {{.*}}, align 4, !tbaa ![[MAY_ALIAS_TBAA:.*]]
8 }
9
test_scalar2()10 void test_scalar2() {
11 // CHECK-LABEL: define{{.*}} void @_Z12test_scalar2v
12 struct S {int m;};
13 __builtin_bit_cast(int, S{42});
14
15 // CHECK: load i32, i32* {{.*}}, align 4, !tbaa ![[MAY_ALIAS_TBAA]]
16 }
17
test_same_type(int & r)18 int test_same_type(int &r) {
19 // CHECK: load i32, i32* {{.*}}, align 4, !tbaa ![[MAY_ALIAS_TBAA]]
20 return __builtin_bit_cast(int, r);
21 }
22
23 // CHECK: ![[CHAR_TBAA:.*]] = !{!"omnipotent char", {{.*}}, i64 0}
24 // CHECK: ![[MAY_ALIAS_TBAA]] = !{![[CHAR_TBAA]], ![[CHAR_TBAA]], i64 0}
25