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| author | Dan Gohman <gohman@apple.com> | 2009-10-19 16:04:50 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-10-19 16:04:50 +0000 |
| commit | 841a14753175bb9a02a8f5286ffe03d050b0da26 (patch) | |
| tree | 5e545d4efd18acb564b73ca09f0563ca2816c3ce /test/Transforms/LoopSimplify | |
| parent | dfffba6a83b7f79c8853e1412a93442b7a9b825d (diff) | |
| download | llvm-841a14753175bb9a02a8f5286ffe03d050b0da26.tar.gz llvm-841a14753175bb9a02a8f5286ffe03d050b0da26.tar.bz2 llvm-841a14753175bb9a02a8f5286ffe03d050b0da26.tar.xz | |
Fix SplitBlockPredecessors' LoopInfo updating code to handle the case
where a loop's header is being split and it has predecessors which are not
contained by the most-nested loop which contains the loop.
This fixes PR5235.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84505 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/LoopSimplify')
| -rw-r--r-- | test/Transforms/LoopSimplify/unreachable-loop-pred.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/test/Transforms/LoopSimplify/unreachable-loop-pred.ll b/test/Transforms/LoopSimplify/unreachable-loop-pred.ll new file mode 100644 index 0000000000..faaaf97d72 --- /dev/null +++ b/test/Transforms/LoopSimplify/unreachable-loop-pred.ll @@ -0,0 +1,20 @@ +; RUN: opt -S -loopsimplify -disable-output -verify-loop-info -verify-dom-info < %s +; PR5235 + +; When loopsimplify inserts a preheader for this loop, it should add the new +; block to the enclosing loop and not get confused by the unreachable +; bogus loop entry. + +define void @is_extract_cab() nounwind { +entry: + br label %header + +header: ; preds = %if.end206, %cond.end66, %if.end23 + br label %while.body115 + +while.body115: ; preds = %9, %if.end192, %if.end101 + br i1 undef, label %header, label %while.body115 + +foo: + br label %while.body115 +} |