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| author | Chris Lattner <sabre@nondot.org> | 2011-01-03 23:38:13 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2011-01-03 23:38:13 +0000 |
| commit | e508dd4c75705f325764e1197854c0e83266a7ea (patch) | |
| tree | d779457fcb395e7ce59e38f2f0dac349cd0b9e76 /test/Transforms/EarlyCSE | |
| parent | 7158e08b8e619f4dcac9834c57f5f8afd6eea2eb (diff) | |
| download | llvm-e508dd4c75705f325764e1197854c0e83266a7ea.tar.gz llvm-e508dd4c75705f325764e1197854c0e83266a7ea.tar.bz2 llvm-e508dd4c75705f325764e1197854c0e83266a7ea.tar.xz | |
Duncan deftly points out that readnone functions aren't
invalidated by stores, so they can be handled as 'simple'
operations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122785 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/EarlyCSE')
| -rw-r--r-- | test/Transforms/EarlyCSE/basic.ll | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/test/Transforms/EarlyCSE/basic.ll b/test/Transforms/EarlyCSE/basic.ll index bc152e7062..e3c75f97dc 100644 --- a/test/Transforms/EarlyCSE/basic.ll +++ b/test/Transforms/EarlyCSE/basic.ll @@ -106,3 +106,16 @@ define void @test7(i32 *%P) { ; CHECK-NEXT: store i32 45 ; CHECK-NEXT: ret void } + +;; Readnone functions aren't invalidated by stores. +; CHECK: @test8 +define i32 @test8(i32 *%P) { + %V1 = call i32 @func(i32* %P) readnone + store i32 4, i32* %P + %V2 = call i32 @func(i32* %P) readnone + %Diff = sub i32 %V1, %V2 + ret i32 %Diff + ; CHECK: ret i32 0 +} + + |