[llvm] [VPlan] First step towards VPlan cost modeling. (PR #92555)

[via llvm-commits]

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@@ -7300,6 +7295,161 @@ LoopVectorizationPlanner::plan(ElementCount UserVF, unsigned UserIC) {
   return VF;
 }
 
+InstructionCost VPCostContext::getLegacyCost(Instruction *UI,
+                                             ElementCount VF) const {
+  return CM.getInstructionCost(UI, VF).first;
+}
+
+InstructionCost VPCostContext::getLoopExitCost(ElementCount VF) {
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ayalz wrote:

Should VPCostContext provide additional methods addressing the other pre-computation cases?

https://github.com/llvm/llvm-project/pull/92555