[llvm] [VPlan] Port invalid cost remarks to VPlan. (PR #99322)

[Florian Hahn via llvm-commits]

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@@ -4343,24 +4345,43 @@ bool LoopVectorizationPlanner::isMoreProfitable(
   return CmpFn(RTCostA, RTCostB);
 }
 
-static void emitInvalidCostRemarks(SmallVector<InstructionVFPair> InvalidCosts,
-                                   OptimizationRemarkEmitter *ORE,
-                                   Loop *TheLoop) {
+void LoopVectorizationPlanner::emitInvalidCostRemarks(
+    OptimizationRemarkEmitter *ORE) {
+  if (VPlans.empty())
+    return;
+
+  using RecipeVFPair = std::pair<VPRecipeBase *, ElementCount>;
+  SmallVector<RecipeVFPair> InvalidCosts;
+  for (const auto &Plan : VPlans) {
+    for (ElementCount VF : Plan->vectorFactors()) {
+      LLVMContext &LLVMCtx = OrigLoop->getHeader()->getContext();
+      VPCostContext CostCtx(CM.TTI, Legal->getWidestInductionType(), LLVMCtx,
+                            CM);
+      auto Iter = vp_depth_first_deep(Plan->getVectorLoopRegion()->getEntry());
+      for (VPBasicBlock *VPBB : VPBlockUtils::blocksOnly<VPBasicBlock>(Iter)) {
+        for (auto &R : *VPBB) {
+          if (R.cost(VF, CostCtx).isValid())
+            continue;
+          InvalidCosts.emplace_back(&R, VF);
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fhahn wrote:

Done thanks!

https://github.com/llvm/llvm-project/pull/99322