diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Vectorize/LoopVectorize.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp index a9aa48395af..16d8e7e702f 100644 --- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -4052,8 +4052,11 @@ void InnerLoopVectorizer::fixFirstOrderRecurrence(PHINode *Phi) { // Set the insertion point after the previous value if it is an instruction. // Note that the previous value may have been constant-folded so it is not - // guaranteed to be an instruction in the vector loop. - if (LI->getLoopFor(LoopVectorBody)->isLoopInvariant(PreviousParts[UF - 1])) + // guaranteed to be an instruction in the vector loop. Also, if the previous + // value is a phi node, we should insert after all the phi nodes to avoid + // breaking basic block verification. + if (LI->getLoopFor(LoopVectorBody)->isLoopInvariant(PreviousParts[UF - 1]) || + isa<PHINode>(PreviousParts[UF - 1])) Builder.SetInsertPoint(&*LoopVectorBody->getFirstInsertionPt()); else Builder.SetInsertPoint( |
