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author | Carlo Zancanaro <carlo@pc-4w14-0.cs.usyd.edu.au> | 2012-10-15 17:10:06 +1100 |
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committer | Carlo Zancanaro <carlo@pc-4w14-0.cs.usyd.edu.au> | 2012-10-15 17:10:06 +1100 |
commit | be1de4be954c80875ad4108e0a33e8e131b2f2c0 (patch) | |
tree | 1fbbecf276bf7c7bdcbb4dd446099d6d90eaa516 /clang/test/CodeGen/may-alias.c | |
parent | c4626a62754862d20b41e8a46a3574264ea80e6d (diff) | |
parent | f1bd2e48c5324d3f7cda4090c87f8a5b6f463ce2 (diff) |
Merge branch 'master' of ssh://bitbucket.org/czan/honours
Diffstat (limited to 'clang/test/CodeGen/may-alias.c')
-rw-r--r-- | clang/test/CodeGen/may-alias.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/clang/test/CodeGen/may-alias.c b/clang/test/CodeGen/may-alias.c new file mode 100644 index 0000000..b73ee15 --- /dev/null +++ b/clang/test/CodeGen/may-alias.c @@ -0,0 +1,30 @@ +// RUN: %clang_cc1 -Werror -triple i386-unknown-unknown -emit-llvm -O1 -disable-llvm-optzns -o %t %s +// RUN: FileCheck < %t %s + +// Types with the may_alias attribute should be considered equivalent +// to char for aliasing. + +typedef int __attribute__((may_alias)) aliasing_int; + +void test0(aliasing_int *ai, int *i) +{ +// CHECK: store i32 0, i32* %{{.*}}, !tbaa !1 + *ai = 0; +// CHECK: store i32 1, i32* %{{.*}}, !tbaa !3 + *i = 1; +} + +// PR9307 +struct Test1 { int x; }; +struct Test1MA { int x; } __attribute__((may_alias)); +void test1(struct Test1MA *p1, struct Test1 *p2) { + // CHECK: store i32 2, i32* {{%.*}}, !tbaa !1 + p1->x = 2; + // CHECK: store i32 3, i32* {{%.*}}, !tbaa !3 + p2->x = 3; +} + +// CHECK: !0 = metadata !{metadata !"any pointer", metadata !1} +// CHECK: !1 = metadata !{metadata !"omnipotent char", metadata !2} +// CHECK: !2 = metadata !{metadata !"Simple C/C++ TBAA"} +// CHECK: !3 = metadata !{metadata !"int", metadata !1} |