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| author | Chris Lattner <sabre@nondot.org> | 2011-01-02 19:01:03 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2011-01-02 19:01:03 +0000 |
| commit | 62c50fdf69064c0d086aedfadb6ceb7c303bbcb9 (patch) | |
| tree | 5b9b4f6e248ecf48441915887b6977c429129db9 /test/Transforms/LoopIdiom/basic.ll | |
| parent | 81a866d615d6e4ee8dcbd49268d2cfb174f5155b (diff) | |
| download | external_llvm-62c50fdf69064c0d086aedfadb6ceb7c303bbcb9.zip external_llvm-62c50fdf69064c0d086aedfadb6ceb7c303bbcb9.tar.gz external_llvm-62c50fdf69064c0d086aedfadb6ceb7c303bbcb9.tar.bz2 | |
enhance loop idiom recognition to scan *all* unconditionally executed
blocks in a loop, instead of just the header block. This makes it more
aggressive, able to handle Duncan's Ada examples.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122704 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/LoopIdiom/basic.ll')
| -rw-r--r-- | test/Transforms/LoopIdiom/basic.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test/Transforms/LoopIdiom/basic.ll b/test/Transforms/LoopIdiom/basic.ll index 589fea4..3fa6eb9 100644 --- a/test/Transforms/LoopIdiom/basic.ll +++ b/test/Transforms/LoopIdiom/basic.ll @@ -165,4 +165,27 @@ for.end: ; preds = %for.body, %entry } +; This is a loop that was rotated but where the blocks weren't merged. This +; shouldn't perturb us. +define void @test7(i8* %Base, i64 %Size) nounwind ssp { +bb.nph: ; preds = %entry + br label %for.body + +for.body: ; preds = %bb.nph, %for.body + %indvar = phi i64 [ 0, %bb.nph ], [ %indvar.next, %for.body.cont ] + br label %for.body.cont +for.body.cont: + %I.0.014 = getelementptr i8* %Base, i64 %indvar + store i8 0, i8* %I.0.014, 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: @test7 +; CHECK: call void @llvm.memset.p0i8.i64(i8* %Base, i8 0, i64 %Size, i32 1, i1 false) +; CHECK-NOT: store +} + |