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| author | Chris Lattner <sabre@nondot.org> | 2011-01-08 20:54:51 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2011-01-08 20:54:51 +0000 |
| commit | 06511264f806cf2a55a090a555dc91a2a2e10a36 (patch) | |
| tree | 5653d98f5d3d8221e8011a8473ffd5deda916e0f /test/Transforms/MemCpyOpt | |
| parent | 2feee6454d4c9cbb3a104b0f593d31a91a14d15a (diff) | |
| download | llvm-06511264f806cf2a55a090a555dc91a2a2e10a36.tar.gz llvm-06511264f806cf2a55a090a555dc91a2a2e10a36.tar.bz2 llvm-06511264f806cf2a55a090a555dc91a2a2e10a36.tar.xz | |
enhance memcpyopt to merge a store and a subsequent
memset into a single larger memset.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123086 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/MemCpyOpt')
| -rw-r--r-- | test/Transforms/MemCpyOpt/form-memset.ll | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/Transforms/MemCpyOpt/form-memset.ll b/test/Transforms/MemCpyOpt/form-memset.ll index 2760e731c9..04bd6742ef 100644 --- a/test/Transforms/MemCpyOpt/form-memset.ll +++ b/test/Transforms/MemCpyOpt/form-memset.ll @@ -162,3 +162,21 @@ entry: } declare void @foo(%struct.MV*, %struct.MV*, i8*) + + +define void @test3(i32* nocapture %P) nounwind ssp { +entry: + %arrayidx = getelementptr inbounds i32* %P, i64 1 + store i32 0, i32* %arrayidx, align 4 + %add.ptr = getelementptr inbounds i32* %P, i64 2 + %0 = bitcast i32* %add.ptr to i8* + tail call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 11, i32 1, i1 false) + ret void +; CHECK: @test3 +; CHECK-NOT: store +; CHECK: call void @llvm.memset.p0i8.i64(i8* %1, i8 0, i64 15, i32 4, i1 false) +} + +declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind + + |