================
@@ -7763,6 +7763,41 @@ VPValue *VPRecipeBuilder::createEdgeMask(BasicBlock
*Src, BasicBlock *Dst) {
VPValue *SrcMask = getBlockInMask(Src);
+ if (auto *SI = dyn_cast<SwitchInst>(Src->getTerminator())) {
+ // Create mask where the terminator in Src is a switch. We need to handle 2
+ // separate cases:
+ // 1. Dst is not the default desintation. Dst is reached if any of the
cases
+ // with destination == Dst are taken. Join the conditions for each case
+ // where destination == Dst using a logical OR.
+ // 2. Dst is the default destination. Dst is reached if none of the cases
+ // with destination != Dst are taken. Join the conditions for each case
+ // where the destination is != Dst using a logical OR and negate it.
----------------
fhahn wrote:
They are filtered out during the loop below I think.
https://github.com/llvm/llvm-project/pull/99808
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