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| author | Chris Lattner <sabre@nondot.org> | 2011-01-02 03:37:56 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2011-01-02 03:37:56 +0000 |
| commit | e2c43920919c6fe376613d1d8331897dc1ba3d57 (patch) | |
| tree | a888fc1f2bd27d531ecb90121b6366377206960e /test/Transforms/LoopIdiom | |
| parent | abd6c754090b1ff13b0dee925989bf8676d9cb4c (diff) | |
| download | llvm-e2c43920919c6fe376613d1d8331897dc1ba3d57.tar.gz llvm-e2c43920919c6fe376613d1d8331897dc1ba3d57.tar.bz2 llvm-e2c43920919c6fe376613d1d8331897dc1ba3d57.tar.xz | |
teach loop idiom recognition to form memcpy's from simple loops.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122678 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/LoopIdiom')
| -rw-r--r-- | test/Transforms/LoopIdiom/basic.ll | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/test/Transforms/LoopIdiom/basic.ll b/test/Transforms/LoopIdiom/basic.ll index ee93cb3262..8929fe4801 100644 --- a/test/Transforms/LoopIdiom/basic.ll +++ b/test/Transforms/LoopIdiom/basic.ll @@ -114,3 +114,31 @@ for.end: ; preds = %for.body, %entry ; CHECK: ret void } + +;; memcpy formation +define void @test6(i64 %Size) nounwind ssp { +bb.nph: + %Base = alloca i8, i32 10000 + %Dest = alloca i8, i32 10000 + br label %for.body + +for.body: ; preds = %bb.nph, %for.body + %indvar = phi i64 [ 0, %bb.nph ], [ %indvar.next, %for.body ] + %I.0.014 = getelementptr i8* %Base, i64 %indvar + %DestI = getelementptr i8* %Dest, i64 %indvar + %V = load i8* %I.0.014, align 1 + store i8 %V, i8* %DestI, align 1 + %indvar.next = add i64 %indvar, 1 + %exitcond = icmp eq i64 %indvar.next, %Size + br i1 %exitcond, label %for.end, label %for.body + +for.end: ; preds = %for.body, %entry + ret void +; CHECK: @test6 +; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %Dest, i8* %Base, i64 %Size, i32 1, i1 false) +; CHECK-NOT: store +; CHECK: ret void +} + + + |