vendor/llvm-project/llvmorg-15-init-17485-ga3e38b4a206b

1 files changed, 10 insertions, 1 deletions

diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
index e136cd9aedac..cd044c78d900 100644
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -3744,7 +3744,7 @@ void BoUpSLP::reorderTopToBottom() {
       unsigned Opcode0 = TE->getOpcode();
       unsigned Opcode1 = TE->getAltOpcode();
       // The opcode mask selects between the two opcodes.
-      SmallBitVector OpcodeMask(TE->Scalars.size(), 0);
+      SmallBitVector OpcodeMask(TE->Scalars.size(), false);
       for (unsigned Lane : seq<unsigned>(0, TE->Scalars.size()))
         if (cast<Instruction>(TE->Scalars[Lane])->getOpcode() == Opcode1)
           OpcodeMask.set(Lane);
@@ -4814,6 +4814,15 @@ void BoUpSLP::buildTree_rec(ArrayRef<Value *> VL, unsigned Depth,
     return;
   }
 
+  // Don't go into catchswitch blocks, which can happen with PHIs.
+  // Such blocks can only have PHIs and the catchswitch.  There is no
+  // place to insert a shuffle if we need to, so just avoid that issue.
+  if (isa<CatchSwitchInst>(BB->getTerminator())) {
+    LLVM_DEBUG(dbgs() << "SLP: bundle in catchswitch block.\n");
+    newTreeEntry(VL, None /*not vectorized*/, S, UserTreeIdx);
+    return;
+  }
+
   // Check that every instruction appears once in this bundle.
   if (!TryToFindDuplicates(S))
     return;