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| author | Owen Anderson <resistor@mac.com> | 2009-10-28 06:30:52 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2009-10-28 06:30:52 +0000 |
| commit | fc16e5a98f691d3fb290f30f5089c48764de372e (patch) | |
| tree | 62cfc8d623d931069bab25aa744621b6cda227ec /llvm/test/Transforms/GVN/invariant-simple.ll | |
| parent | f64db3e1d05b76e045b0700bfff4476574c00df0 (diff) | |
| download | bcm5719-llvm-fc16e5a98f691d3fb290f30f5089c48764de372e.tar.gz bcm5719-llvm-fc16e5a98f691d3fb290f30f5089c48764de372e.zip | |
Be more careful about invariance reasoning on "store" queries. Stores still need
to depend on Ref and ModRef calls within the invariant region.
llvm-svn: 85380
Diffstat (limited to 'llvm/test/Transforms/GVN/invariant-simple.ll')
| -rw-r--r-- | llvm/test/Transforms/GVN/invariant-simple.ll | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/llvm/test/Transforms/GVN/invariant-simple.ll b/llvm/test/Transforms/GVN/invariant-simple.ll index c3ff353833b..6de75f14350 100644 --- a/llvm/test/Transforms/GVN/invariant-simple.ll +++ b/llvm/test/Transforms/GVN/invariant-simple.ll @@ -16,6 +16,21 @@ entry: ret i8 %2 } +define i8 @test2(i8* %P) nounwind { +; CHECK: @test2 +; CHECK: store i8 1 +; CHECK: store i8 2 +; CHECK: ret i8 0 +entry: + store i8 1, i8* %P + %0 = call {}* @llvm.invariant.start(i64 32, i8* %P) + %1 = tail call i32 @bar(i8* %P) + call void @llvm.invariant.end({}* %0, i64 32, i8* %P) + store i8 2, i8* %P + ret i8 0 +} + declare i32 @foo(i8*) nounwind +declare i32 @bar(i8*) nounwind readonly declare {}* @llvm.invariant.start(i64 %S, i8* nocapture %P) readonly declare void @llvm.invariant.end({}* %S, i64 %SS, i8* nocapture %P)
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