| // RUN: %clang_cc1 -Werror -triple i386-unknown-unknown -emit-llvm -O1 -disable-llvm-optzns -o %t %s |
| // RUN: FileCheck < %t %s |
| |
| // Types with the may_alias attribute should be considered equivalent |
| // to char for aliasing. |
| |
| typedef int __attribute__((may_alias)) aliasing_int; |
| |
| void test0(aliasing_int *ai, int *i) |
| { |
| // CHECK: store i32 0, i32* %{{.*}}, !tbaa !1 |
| *ai = 0; |
| // CHECK: store i32 1, i32* %{{.*}}, !tbaa !3 |
| *i = 1; |
| } |
| |
| // PR9307 |
| struct Test1 { int x; }; |
| struct Test1MA { int x; } __attribute__((may_alias)); |
| void test1(struct Test1MA *p1, struct Test1 *p2) { |
| // CHECK: store i32 2, i32* {{%.*}}, !tbaa !1 |
| p1->x = 2; |
| // CHECK: store i32 3, i32* {{%.*}}, !tbaa !3 |
| p2->x = 3; |
| } |
| |
| // CHECK: !0 = metadata !{metadata !"any pointer", metadata !1} |
| // CHECK: !1 = metadata !{metadata !"omnipotent char", metadata !2} |
| // CHECK: !2 = metadata !{metadata !"Simple C/C++ TBAA", null} |
| // CHECK: !3 = metadata !{metadata !"int", metadata !1} |