forked from OSchip/llvm-project
42 lines
1.8 KiB
C
42 lines
1.8 KiB
C
// RUN: %clang_cc1 -Werror -triple i386-unknown-unknown -emit-llvm -O1 -disable-llvm-optzns -o - %s | FileCheck %s
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// RUN: %clang_cc1 -Werror -triple i386-unknown-unknown -emit-llvm -O1 -struct-path-tbaa -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 !1
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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 !3
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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 !1
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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 !3
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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: !0 = metadata !{metadata !"any pointer", metadata !1}
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// CHECK: !1 = metadata !{metadata !"omnipotent char", metadata !2}
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// CHECK: !2 = metadata !{metadata !"Simple C/C++ TBAA"}
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// CHECK: !3 = metadata !{metadata !"int", metadata !1}
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// PATH: [[TYPE_CHAR:!.*]] = metadata !{metadata !"omnipotent char", metadata !{{.*}}
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// PATH: [[TAG_CHAR]] = metadata !{metadata [[TYPE_CHAR]], metadata [[TYPE_CHAR]], i64 0}
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// PATH: [[TAG_INT]] = metadata !{metadata [[TYPE_INT:!.*]], metadata [[TYPE_INT]], i64 0}
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// PATH: [[TYPE_INT]] = metadata !{metadata !"int", metadata [[TYPE_CHAR]]
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// PATH: [[TAG_test1_x]] = metadata !{metadata [[TYPE_test1:!.*]], metadata [[TYPE_INT]], i64 0}
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// PATH: [[TYPE_test1]] = metadata !{metadata !"_ZTS5Test1", metadata [[TYPE_INT]], i64 0}
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