diff options
| author | Andrew Trick <atrick@apple.com> | 2013-03-19 05:10:27 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2013-03-19 05:10:27 +0000 |
| commit | d37c8568e68d0ea3492503cd192783900e2d922a (patch) | |
| tree | f24770972672983e73bb48a85b6fedbf236cfcab | |
| parent | 82cd8f7382322bee7a71cdc31f7a923c44d37d32 (diff) | |
Revert "Cleanup some SCEV logic a bit."
This reverts commit 82cd8f7382322bee7a71cdc31f7a923c44d37d32.
Just add a comment instead!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177377 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Transforms/Scalar/LoopStrengthReduce.cpp | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp index f01af001ca..9562cf8d5d 100644 --- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -2716,11 +2716,11 @@ void LSRInstance::GenerateIVChain(const IVChain &Chain, SCEVExpander &Rewriter, // by LSR. const IVInc &Head = Chain.Incs[0]; User::op_iterator IVOpEnd = Head.UserInst->op_end(); + // findIVOperand returns IVOpEnd if it can no longer find a valid IV user. User::op_iterator IVOpIter = findIVOperand(Head.UserInst->op_begin(), IVOpEnd, L, SE); - assert(IVOpIter != IVOpEnd && "No IV operands found"); Value *IVSrc = 0; - do { + while (IVOpIter != IVOpEnd) { IVSrc = getWideOperand(*IVOpIter); // If this operand computes the expression that the chain needs, we may use @@ -2736,8 +2736,7 @@ void LSRInstance::GenerateIVChain(const IVChain &Chain, SCEVExpander &Rewriter, break; } IVOpIter = findIVOperand(llvm::next(IVOpIter), IVOpEnd, L, SE); - } while (IVOpIter != IVOpEnd); - + } if (IVOpIter == IVOpEnd) { // Gracefully give up on this chain. DEBUG(dbgs() << "Concealed chain head: " << *Head.UserInst << "\n"); |