1// RUN: %clang_cc1 -Werror -triple i386-unknown-unknown -emit-llvm -O1 -disable-llvm-optzns -o %t %s 2// RUN: FileCheck < %t %s 3 4// Types with the may_alias attribute should be considered equivalent 5// to char for aliasing. 6 7typedef int __attribute__((may_alias)) aliasing_int; 8 9void test0(aliasing_int *ai, int *i) 10{ 11// CHECK: store i32 0, i32* %{{.*}}, !tbaa !1 12 *ai = 0; 13// CHECK: store i32 1, i32* %{{.*}}, !tbaa !3 14 *i = 1; 15} 16 17// PR9307 18struct Test1 { int x; }; 19struct Test1MA { int x; } __attribute__((may_alias)); 20void test1(struct Test1MA *p1, struct Test1 *p2) { 21 // CHECK: store i32 2, i32* {{%.*}}, !tbaa !1 22 p1->x = 2; 23 // CHECK: store i32 3, i32* {{%.*}}, !tbaa !3 24 p2->x = 3; 25} 26 27// CHECK: !0 = metadata !{metadata !"any pointer", metadata !1} 28// CHECK: !1 = metadata !{metadata !"omnipotent char", metadata !2} 29// CHECK: !2 = metadata !{metadata !"Simple C/C++ TBAA", null} 30// CHECK: !3 = metadata !{metadata !"int", metadata !1} 31