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| author | Tim Shen <timshen91@gmail.com> | 2018-07-13 23:40:00 +0000 |
|---|---|---|
| committer | Tim Shen <timshen91@gmail.com> | 2018-07-13 23:40:00 +0000 |
| commit | 9e25d5d2ce0e123b7a5c2e192420656b8336628c (patch) | |
| tree | b62a9cfe76457e587ebcabf9614e28c7e900ddf2 /llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp | |
| parent | 94c4512a8c6a60e544394a9d504625eb26addd0c (diff) | |
| download | bcm5719-llvm-9e25d5d2ce0e123b7a5c2e192420656b8336628c.tar.gz bcm5719-llvm-9e25d5d2ce0e123b7a5c2e192420656b8336628c.zip | |
[LSR] If no Use is interesting, early return.
Summary:
By looking at the callers of getUse(), we can see that even though
IVUsers may offer uses, but they may not be interesting to
LSR. It's possible that none of them is interesting.
Reviewers: sanjoy
Subscribers: jlebar, hiraditya, bixia, llvm-commits
Differential Revision: https://reviews.llvm.org/D49049
llvm-svn: 337072
Diffstat (limited to 'llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp index 03429e9698a..fa83b48210b 100644 --- a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -5400,7 +5400,9 @@ LSRInstance::LSRInstance(Loop *L, IVUsers &IU, ScalarEvolution &SE, CollectFixupsAndInitialFormulae(); CollectLoopInvariantFixupsAndFormulae(); - assert(!Uses.empty() && "IVUsers reported at least one use"); + if (Uses.empty()) + return; + LLVM_DEBUG(dbgs() << "LSR found " << Uses.size() << " uses:\n"; print_uses(dbgs())); |
