[libc-commits] [libcxx] [compiler-rt] [lld] [libc] [flang] [lldb] [clang-tools-extra] [llvm] [clang] [VPlan] Implement cloning of VPlans. (PR #73158)
via libc-commits
libc-commits at lists.llvm.org
Thu Jan 25 15:08:02 PST 2024
================
@@ -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");
+
----------------
ayalz wrote:
nit: empty line intentional?
https://github.com/llvm/llvm-project/pull/73158
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