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43 lines
1.8 KiB
43 lines
1.8 KiB
4 months ago
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// RUN: %clang_cc1 -Werror -triple i386-unknown-unknown -emit-llvm -O1 -no-struct-path-tbaa -disable-llvm-optzns -o - %s | FileCheck %s
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// RUN: %clang_cc1 -Werror -triple i386-unknown-unknown -emit-llvm -O1 -disable-llvm-optzns -o - %s | FileCheck %s -check-prefix=PATH
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// Types with the may_alias attribute should be considered equivalent
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// to char for aliasing.
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typedef int __attribute__((may_alias)) aliasing_int;
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void test0(aliasing_int *ai, int *i)
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{
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// CHECK: store i32 0, i32* %{{.*}}, !tbaa [[TAG_CHAR:!.*]]
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// PATH: store i32 0, i32* %{{.*}}, !tbaa [[TAG_CHAR:!.*]]
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*ai = 0;
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// CHECK: store i32 1, i32* %{{.*}}, !tbaa [[TAG_INT:!.*]]
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// PATH: store i32 1, i32* %{{.*}}, !tbaa [[TAG_INT:!.*]]
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*i = 1;
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}
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// PR9307
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struct Test1 { int x; };
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struct Test1MA { int x; } __attribute__((may_alias));
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void test1(struct Test1MA *p1, struct Test1 *p2) {
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// CHECK: store i32 2, i32* {{%.*}}, !tbaa [[TAG_CHAR]]
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// PATH: store i32 2, i32* {{%.*}}, !tbaa [[TAG_CHAR]]
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p1->x = 2;
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// CHECK: store i32 3, i32* {{%.*}}, !tbaa [[TAG_INT]]
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// PATH: store i32 3, i32* {{%.*}}, !tbaa [[TAG_test1_x:!.*]]
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p2->x = 3;
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}
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// CHECK: !"any pointer", [[TYPE_CHAR:!.*]],
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// CHECK: [[TYPE_CHAR]] = !{!"omnipotent char", [[TAG_CXX_TBAA:!.*]],
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// CHECK: [[TAG_CXX_TBAA]] = !{!"Simple C/C++ TBAA"}
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// CHECK: [[TAG_CHAR]] = !{[[TYPE_CHAR]], [[TYPE_CHAR]], i64 0}
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// CHECK: [[TAG_INT]] = !{[[TYPE_INT:!.*]], [[TYPE_INT]], i64 0}
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// CHECK: [[TYPE_INT]] = !{!"int", [[TYPE_CHAR]]
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// PATH: [[TYPE_CHAR:!.*]] = !{!"omnipotent char", !{{.*}}
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// PATH: [[TAG_CHAR]] = !{[[TYPE_CHAR]], [[TYPE_CHAR]], i64 0}
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// PATH: [[TAG_INT]] = !{[[TYPE_INT:!.*]], [[TYPE_INT]], i64 0}
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// PATH: [[TYPE_INT]] = !{!"int", [[TYPE_CHAR]]
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// PATH: [[TAG_test1_x]] = !{[[TYPE_test1:!.*]], [[TYPE_INT]], i64 0}
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// PATH: [[TYPE_test1]] = !{!"Test1", [[TYPE_INT]], i64 0}
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