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GVN-hoist: add missing check for all GEP operands available 

llvm-svn: 276364
This commit is contained in:
Sebastian Pop 2016-07-21 23:32:39 +00:00
parent fa522ca3b3
commit c107a4875e
1 changed files with 3 additions and 0 deletions
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3
llvm/lib/Transforms/Scalar/GVNHoist.cpp
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@ -613,6 +613,9 @@ public:
// Also copy Val when it is a GEP.
if (Val && isa<GetElementPtrInst>(Val)) {
// Check whether we can compute the GEP at HoistPt.
if (!allOperandsAvailable(Val, HoistPt))
return false;
Instruction *ClonedVal = Val->clone();
ClonedVal->insertBefore(HoistPt->getTerminator());
// Conservatively discard any optimization hints, they may differ on the