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