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| author | Devang Patel <dpatel@apple.com> | 2007-10-11 17:21:57 +0000 |
|---|---|---|
| committer | Devang Patel <dpatel@apple.com> | 2007-10-11 17:21:57 +0000 |
| commit | 6ad3bd1689f2fc9732c982a8b8429b82856858fd (patch) | |
| tree | e659b315862b3d2c198f74ba92d0679be5dd60b1 /test/Transforms/InstCombine | |
| parent | c004023b0dc1fe12bdcfcd771d98674ac2d8a41f (diff) | |
| download | external_llvm-6ad3bd1689f2fc9732c982a8b8429b82856858fd.zip external_llvm-6ad3bd1689f2fc9732c982a8b8429b82856858fd.tar.gz external_llvm-6ad3bd1689f2fc9732c982a8b8429b82856858fd.tar.bz2 | |
Lower memcpy if it makes sense.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42864 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine')
| -rw-r--r-- | test/Transforms/InstCombine/2007-10-10-EliminateMemCpy.ll | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/2007-10-10-EliminateMemCpy.ll b/test/Transforms/InstCombine/2007-10-10-EliminateMemCpy.ll new file mode 100644 index 0000000..5cc6e3b --- /dev/null +++ b/test/Transforms/InstCombine/2007-10-10-EliminateMemCpy.ll @@ -0,0 +1,18 @@ +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep call +@.str = internal constant [4 x i8] c"xyz\00" ; <[4 x i8]*> [#uses=1] + +define void @foo(i8* %P) { +entry: + %P_addr = alloca i8* ; <i8**> [#uses=2] + %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0] + store i8* %P, i8** %P_addr + %tmp = load i8** %P_addr, align 4 ; <i8*> [#uses=1] + %tmp1 = getelementptr [4 x i8]* @.str, i32 0, i32 0 ; <i8*> [#uses=1] + call void @llvm.memcpy.i32( i8* %tmp, i8* %tmp1, i32 4, i32 1 ) + br label %return + +return: ; preds = %entry + ret void +} + +declare void @llvm.memcpy.i32(i8*, i8*, i32, i32) |