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| author | Nadav Rotem <nrotem@apple.com> | 2012-12-24 01:22:06 +0000 |
|---|---|---|
| committer | Nadav Rotem <nrotem@apple.com> | 2012-12-24 01:22:06 +0000 |
| commit | 470ea9b72f87f2ce4bb09fc6f9829211a090652a (patch) | |
| tree | c1b1ef977069bab5ad4176ee581d582b20c4a4a7 /test/Transforms | |
| parent | a048c237e6848f7c5e9e070a7b701031bb6601e1 (diff) | |
| download | llvm-470ea9b72f87f2ce4bb09fc6f9829211a090652a.tar.gz llvm-470ea9b72f87f2ce4bb09fc6f9829211a090652a.tar.bz2 llvm-470ea9b72f87f2ce4bb09fc6f9829211a090652a.tar.xz | |
LoopVectorizer: Fix an endless loop in the code that looks for reductions.
The bug was in the code that detects PHIs in if-then-else block sequence.
PR14701.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171008 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms')
| -rw-r--r-- | test/Transforms/LoopVectorize/2012-10-20-infloop.ll | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/test/Transforms/LoopVectorize/2012-10-20-infloop.ll b/test/Transforms/LoopVectorize/2012-10-20-infloop.ll index 0176c9a189..da1abc61fa 100644 --- a/test/Transforms/LoopVectorize/2012-10-20-infloop.ll +++ b/test/Transforms/LoopVectorize/2012-10-20-infloop.ll @@ -25,3 +25,47 @@ for.body: ; preds = %for.body, %entry for.end: ; preds = %for.body unreachable } + +;PR14701 +define void @start_model_rare() nounwind uwtable ssp { +entry: + br i1 undef, label %return, label %if.end + +if.end: ; preds = %entry + br i1 undef, label %cond.false, label %cond.true + +cond.true: ; preds = %if.end + unreachable + +cond.false: ; preds = %if.end + br i1 undef, label %cond.false28, label %cond.true20 + +cond.true20: ; preds = %cond.false + unreachable + +cond.false28: ; preds = %cond.false + br label %for.body40 + +for.body40: ; preds = %for.inc50, %cond.false28 + %indvars.iv123 = phi i64 [ 3, %cond.false28 ], [ %indvars.iv.next124, %for.inc50 ] + %step.0121 = phi i32 [ 1, %cond.false28 ], [ %step.1, %for.inc50 ] + br i1 undef, label %if.then46, label %for.inc50 + +if.then46: ; preds = %for.body40 + %inc47 = add nsw i32 %step.0121, 1 + br label %for.inc50 + +for.inc50: ; preds = %if.then46, %for.body40 + %k.1 = phi i32 [ undef, %for.body40 ], [ %inc47, %if.then46 ] + %step.1 = phi i32 [ %step.0121, %for.body40 ], [ %inc47, %if.then46 ] + %indvars.iv.next124 = add i64 %indvars.iv123, 1 + %lftr.wideiv = trunc i64 %indvars.iv.next124 to i32 + %exitcond = icmp eq i32 %lftr.wideiv, 256 + br i1 %exitcond, label %for.end52, label %for.body40 + +for.end52: ; preds = %for.inc50 + unreachable + +return: ; preds = %entry + ret void +} |