1// RUN: %clang_cc1 -Werror -triple i386-unknown-unknown -emit-llvm -O1 -no-struct-path-tbaa -disable-llvm-optzns -o - %s | FileCheck %s
2// RUN: %clang_cc1 -Werror -triple i386-unknown-unknown -emit-llvm -O1 -disable-llvm-optzns -o - %s | FileCheck %s -check-prefix=PATH
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 [[TAG_CHAR:!.*]]
12// PATH: store i32 0, i32* %{{.*}}, !tbaa [[TAG_CHAR:!.*]]
13  *ai = 0;
14// CHECK: store i32 1, i32* %{{.*}}, !tbaa [[TAG_INT:!.*]]
15// PATH: store i32 1, i32* %{{.*}}, !tbaa [[TAG_INT:!.*]]
16  *i = 1;
17}
18
19// PR9307
20struct Test1 { int x; };
21struct Test1MA { int x; } __attribute__((may_alias));
22void test1(struct Test1MA *p1, struct Test1 *p2) {
23  // CHECK: store i32 2, i32* {{%.*}}, !tbaa [[TAG_CHAR]]
24  // PATH: store i32 2, i32* {{%.*}}, !tbaa [[TAG_CHAR]]
25  p1->x = 2;
26  // CHECK: store i32 3, i32* {{%.*}}, !tbaa [[TAG_INT]]
27  // PATH: store i32 3, i32* {{%.*}}, !tbaa [[TAG_test1_x:!.*]]
28  p2->x = 3;
29}
30// CHECK:  !"any pointer", [[TYPE_CHAR:!.*]],
31// CHECK: [[TYPE_CHAR]] = !{!"omnipotent char", [[TAG_CXX_TBAA:!.*]],
32// CHECK: [[TAG_CXX_TBAA]] = !{!"Simple C/C++ TBAA"}
33// CHECK: [[TAG_CHAR]] = !{[[TYPE_CHAR]], [[TYPE_CHAR]], i64 0}
34// CHECK: [[TAG_INT]] = !{[[TYPE_INT:!.*]], [[TYPE_INT]], i64 0}
35// CHECK: [[TYPE_INT]] = !{!"int", [[TYPE_CHAR]]
36
37// PATH: [[TYPE_CHAR:!.*]] = !{!"omnipotent char", !{{.*}}
38// PATH: [[TAG_CHAR]] = !{[[TYPE_CHAR]], [[TYPE_CHAR]], i64 0}
39// PATH: [[TAG_INT]] = !{[[TYPE_INT:!.*]], [[TYPE_INT]], i64 0}
40// PATH: [[TYPE_INT]] = !{!"int", [[TYPE_CHAR]]
41// PATH: [[TAG_test1_x]] = !{[[TYPE_test1:!.*]], [[TYPE_INT]], i64 0}
42// PATH: [[TYPE_test1]] = !{!"Test1", [[TYPE_INT]], i64 0}
43