================
@@ -982,6 +1037,92 @@ void VPlan::updateDominatorTree(DominatorTree *DT,
BasicBlock *LoopHeaderBB,
assert(DT->verify(DominatorTree::VerificationLevel::Fast));
}
+static void remapOperands(VPBlockBase *Entry, VPBlockBase *NewEntry,
+ DenseMap<VPValue *, VPValue *> &Old2NewVPValues) {
+ // Update the operands of all cloned recipes starting at NewEntry. This
+ // traverses all reachable blocks. This is done in two steps, to handle
cycles
+ // in PHI recipes.
+ ReversePostOrderTraversal<VPBlockDeepTraversalWrapper<VPBlockBase *>>
+ OldDeepRPOT(Entry);
+ ReversePostOrderTraversal<VPBlockDeepTraversalWrapper<VPBlockBase *>>
+ NewDeepRPOT(NewEntry);
+ // First, collect all mappings from old to new VPValues defined by cloned
+ // recipes.
+ for (const auto &[OldBB, NewBB] :
+ zip(VPBlockUtils::blocksOnly<VPBasicBlock>(OldDeepRPOT),
+ VPBlockUtils::blocksOnly<VPBasicBlock>(NewDeepRPOT))) {
+ assert(OldBB->getRecipeList().size() == NewBB->getRecipeList().size() &&
+ "blocks must have the same number of recipes");
+
+ for (const auto &[OldR, NewR] : zip(*OldBB, *NewBB)) {
+ assert(OldR.getNumOperands() == NewR.getNumOperands() &&
+ "recipes must have the same number of operands");
+ assert(OldR.getNumDefinedValues() == NewR.getNumDefinedValues() &&
+ "recipes must define the same number of operands");
+ for (const auto &[OldV, NewV] :
+ zip(OldR.definedValues(), NewR.definedValues()))
+ Old2NewVPValues[OldV] = NewV;
+ }
+ }
+
+ // Update all operands to use cloned VPValues.
+ for (VPBasicBlock *NewBB :
+ VPBlockUtils::blocksOnly<VPBasicBlock>(NewDeepRPOT)) {
+ for (VPRecipeBase &NewR : *NewBB)
+ for (unsigned I = 0, E = NewR.getNumOperands(); I != E; ++I) {
+ VPValue *NewOp = Old2NewVPValues.lookup(NewR.getOperand(I));
+ NewR.setOperand(I, NewOp);
+ }
+ }
+}
+
+VPlan *VPlan::clone() {
+ DenseMap<VPValue *, VPValue *> Old2NewVPValues;
----------------
ayalz wrote:
nit: can define below when starting to deal with values.
https://github.com/llvm/llvm-project/pull/73158
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