[llvm] [VPlan] Introduce ComputeReductionResult VPInstruction opcode. (PR #70253)

[Alexey Bataev via llvm-commits]

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@@ -10197,8 +10070,8 @@ bool LoopVectorizePass::processLoop(Loop *L) {
                                            EPI, &LVL, &CM, BFI, PSI, Checks);
 
         VPlan &BestMainPlan = LVP.getBestPlanFor(EPI.MainLoopVF);
-        auto ExpandedSCEVs = LVP.executePlan(EPI.MainLoopVF, EPI.MainLoopUF,
-                                             BestMainPlan, MainILV, DT, true);
+        const auto &[ExpandedSCEVs, ReductionResumeValues] = LVP.executePlan(
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alexey-bataev wrote:

Hm, a reference to a copied containers? May it cause troubles use-after-delete? Should it be rvalue ref instead?

https://github.com/llvm/llvm-project/pull/70253