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| author | Owen Anderson <resistor@mac.com> | 2009-10-28 06:18:42 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2009-10-28 06:18:42 +0000 |
| commit | 4bc737c5ef120e27834b92a86939331f370ba49c (patch) | |
| tree | 8d43f7fee9ec55ac6d9bdd4020a8907c3aeff778 /test/Transforms/GVN | |
| parent | 50b136dae90eb37f9fc9517a8638020db4f04f9c (diff) | |
| download | llvm-4bc737c5ef120e27834b92a86939331f370ba49c.tar.gz llvm-4bc737c5ef120e27834b92a86939331f370ba49c.tar.bz2 llvm-4bc737c5ef120e27834b92a86939331f370ba49c.tar.xz | |
Add trivial support for the invariance intrinsics to memdep. This logic is
purely local for now.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85378 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/GVN')
| -rw-r--r-- | test/Transforms/GVN/invariant-simple.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/test/Transforms/GVN/invariant-simple.ll b/test/Transforms/GVN/invariant-simple.ll new file mode 100644 index 0000000000..c3ff353833 --- /dev/null +++ b/test/Transforms/GVN/invariant-simple.ll @@ -0,0 +1,21 @@ +; RUN: opt < %s -gvn -S | FileCheck %s + +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" +target triple = "i386-apple-darwin7" + +define i8 @test(i8* %P) nounwind { +; CHECK: @test +; CHECK-NOT: load +; CHECK: ret i8 +entry: + store i8 1, i8* %P + %0 = call {}* @llvm.invariant.start(i64 32, i8* %P) + %1 = tail call i32 @foo(i8* %P) + call void @llvm.invariant.end({}* %0, i64 32, i8* %P) + %2 = load i8* %P + ret i8 %2 +} + +declare i32 @foo(i8*) nounwind +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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