[llvm] [VPlan] Compute cost of more replicating loads/stores in ::computeCost. (PR #160053)

[Florian Hahn via llvm-commits]

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@@ -3075,6 +3075,63 @@ bool VPReplicateRecipe::shouldPack() const {
   });
 }
 
+/// Returns true if \p Ptr is a pointer computation for which the legacy cost
+/// model computes a SCEV expression when comping the address cost.
+static bool shouldUseAddressAccessSCEV(VPValue *Ptr) {
+  auto *PtrR = Ptr->getDefiningRecipe();
+  if (!PtrR || !((isa<VPReplicateRecipe>(PtrR) &&
+                  cast<VPReplicateRecipe>(PtrR)->getOpcode() ==
+                      Instruction::GetElementPtr) ||
+                 isa<VPWidenGEPRecipe>(PtrR)))
+    return false;
+
+  // We are looking for a gep with all loop invariant indices except for one
+  // which should be an induction variable.
+  unsigned NumOperands = PtrR->getNumOperands();
+  for (unsigned Idx = 1; Idx < NumOperands; ++Idx) {
+    VPValue *Opd = PtrR->getOperand(Idx);
+    if (!(Opd->isDefinedOutsideLoopRegions()) &&
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fhahn wrote:

Yep, removed thanks!

https://github.com/llvm/llvm-project/pull/160053