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| author | Torok Edwin <edwintorok@gmail.com> | 2008-10-27 10:18:45 +0000 |
|---|---|---|
| committer | Torok Edwin <edwintorok@gmail.com> | 2008-10-27 10:18:45 +0000 |
| commit | c83889ad906b130f39ba8f776111e51439c2a7ac (patch) | |
| tree | 0e6ffc443701268bf77529933f4e47b19f3b7333 /lib | |
| parent | 6f038f4140615380e493dc6a7cff42b0f3061301 (diff) | |
| download | external_llvm-c83889ad906b130f39ba8f776111e51439c2a7ac.zip external_llvm-c83889ad906b130f39ba8f776111e51439c2a7ac.tar.gz external_llvm-c83889ad906b130f39ba8f776111e51439c2a7ac.tar.bz2 | |
Avoid crashing if instruction is not part of a loop.
If it is not part of a loop it is obviously invariant wrt to all loops.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58240 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Analysis/LoopVR.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/Analysis/LoopVR.cpp b/lib/Analysis/LoopVR.cpp index 7f5de25..d0b77b89 100644 --- a/lib/Analysis/LoopVR.cpp +++ b/lib/Analysis/LoopVR.cpp @@ -247,12 +247,13 @@ ConstantRange LoopVR::compute(Value *V) { return ConstantRange(cast<IntegerType>(V->getType())->getBitWidth(), false); LoopInfo &LI = getAnalysis<LoopInfo>(); - ScalarEvolution &SE = getAnalysis<ScalarEvolution>(); Loop *L = LI.getLoopFor(I->getParent()); - if (L->isLoopInvariant(I)) + if (!L || L->isLoopInvariant(I)) return ConstantRange(cast<IntegerType>(V->getType())->getBitWidth(), false); + ScalarEvolution &SE = getAnalysis<ScalarEvolution>(); + SCEVHandle S = SE.getSCEV(I); if (isa<SCEVUnknown>(S) || isa<SCEVCouldNotCompute>(S)) return ConstantRange(cast<IntegerType>(V->getType())->getBitWidth(), false); |