================
@@ -1300,14 +1301,38 @@ static VPActiveLaneMaskPHIRecipe
*addVPLaneMaskPhiAndUpdateExitBranch(
cast<VPInstruction>(CanonicalIVPHI->getBackedgeValue());
// TODO: Check if dropping the flags is needed if
// !DataAndControlFlowWithoutRuntimeCheck.
+ VPValue *IncVal = CanonicalIVIncrement->getOperand(1);
+ assert(IncVal != CanonicalIVPHI && "Unexpected operand order");
+
CanonicalIVIncrement->dropPoisonGeneratingFlags();
DebugLoc DL = CanonicalIVIncrement->getDebugLoc();
+
// We can't use StartV directly in the ActiveLaneMask VPInstruction, since
// we have to take unrolling into account. Each part needs to start at
// Part * VF
auto *VecPreheader = Plan.getVectorPreheader();
VPBuilder Builder(VecPreheader);
+ // Create an alias mask for each possibly-aliasing pointer pair. If there
+ // are multiple they are combined together with ANDs.
+ VPValue *AliasMask = nullptr;
+
+ for (auto C : RTChecks) {
+ // FIXME: How to pass this info back?
+ // HasAliasMask = true;
----------------
MacDue wrote:
This FIXME is a little unclear. Does it mean `HasAliasMask` should be set here
but it's not?
https://github.com/llvm/llvm-project/pull/100579
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