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[LSR] Silence static analyzer null dereference warnings with assertions. NFCI.

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Add assertions to make it clear that GenerateIVChain / NarrowSearchSpaceByPickingWinnerRegs should succeed in finding non-null values

llvm-svn: 372518
This commit is contained in:
Simon Pilgrim 2019-09-22 17:59:24 +00:00
parent 322c52a01b
commit 6fd9cdde6b
1 changed files with 2 additions and 0 deletions
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2
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -3165,6 +3165,7 @@ void LSRInstance::GenerateIVChain(const IVChain &Chain, SCEVExpander &Rewriter,
LLVM_DEBUG(dbgs() << "Concealed chain head: " << *Head.UserInst << "\n");
return;
}
assert(IVSrc && "Failed to find IV chain source");
LLVM_DEBUG(dbgs() << "Generate chain at: " << *IVSrc << "\n");
Type *IVTy = IVSrc->getType();
@ -4835,6 +4836,7 @@ void LSRInstance::NarrowSearchSpaceByPickingWinnerRegs() {
}
}
}
assert(Best && "Failed to find best LSRUse candidate");
LLVM_DEBUG(dbgs() << "Narrowing the search space by assuming " << *Best
<< " will yield profitable reuse.\n");