[LV] Strip unnecessary make_{pair,optional} (NFC) (llvm#141924)

Author: artagnon

llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

@@ -1080,7 +1080,7 @@ class LoopVectorizationCostModel {
   void setWideningDecision(Instruction *I, ElementCount VF, InstWidening W,
                            InstructionCost Cost) {
     assert(VF.isVector() && "Expected VF >=2");
-    WideningDecisions[std::make_pair(I, VF)] = std::make_pair(W, Cost);
+    WideningDecisions[{I, VF}] = {W, Cost};
   }
 
   /// Save vectorization decision \p W and \p Cost taken by the cost model for
@@ -1102,11 +1102,9 @@ class LoopVectorizationCostModel {
     for (unsigned Idx = 0; Idx < Grp->getFactor(); ++Idx) {
       if (auto *I = Grp->getMember(Idx)) {
         if (Grp->getInsertPos() == I)
-          WideningDecisions[std::make_pair(I, VF)] =
-              std::make_pair(W, InsertPosCost);
+          WideningDecisions[{I, VF}] = {W, InsertPosCost};
         else
-          WideningDecisions[std::make_pair(I, VF)] =
-              std::make_pair(W, OtherMemberCost);
+          WideningDecisions[{I, VF}] = {W, OtherMemberCost};
       }
     }
   }
@@ -1120,7 +1118,7 @@ class LoopVectorizationCostModel {
         TheLoop->isInnermost() &&
         "cost-model should not be used for outer loops (in VPlan-native path)");
 
-    std::pair<Instruction *, ElementCount> InstOnVF = std::make_pair(I, VF);
+    std::pair<Instruction *, ElementCount> InstOnVF(I, VF);
     auto Itr = WideningDecisions.find(InstOnVF);
     if (Itr == WideningDecisions.end())
       return CM_Unknown;
@@ -1131,7 +1129,7 @@ class LoopVectorizationCostModel {
   /// width \p VF.
   InstructionCost getWideningCost(Instruction *I, ElementCount VF) {
     assert(VF.isVector() && "Expected VF >=2");
-    std::pair<Instruction *, ElementCount> InstOnVF = std::make_pair(I, VF);
+    std::pair<Instruction *, ElementCount> InstOnVF(I, VF);
     assert(WideningDecisions.contains(InstOnVF) &&
            "The cost is not calculated");
     return WideningDecisions[InstOnVF].second;
@@ -1150,8 +1148,7 @@ class LoopVectorizationCostModel {
                                std::optional<unsigned> MaskPos,
                                InstructionCost Cost) {
     assert(!VF.isScalar() && "Expected vector VF");
-    CallWideningDecisions[std::make_pair(CI, VF)] = {Kind, Variant, IID,
-                                                     MaskPos, Cost};
+    CallWideningDecisions[{CI, VF}] = {Kind, Variant, IID, MaskPos, Cost};
   }
 
   CallWideningDecision getCallWideningDecision(CallInst *CI,
@@ -1348,21 +1345,20 @@ class LoopVectorizationCostModel {
   void setTailFoldingStyles(bool IsScalableVF, unsigned UserIC) {
     assert(!ChosenTailFoldingStyle && "Tail folding must not be selected yet.");
     if (!Legal->canFoldTailByMasking()) {
-      ChosenTailFoldingStyle =
-          std::make_pair(TailFoldingStyle::None, TailFoldingStyle::None);
+      ChosenTailFoldingStyle = {TailFoldingStyle::None, TailFoldingStyle::None};
       return;
     }
 
     if (!ForceTailFoldingStyle.getNumOccurrences()) {
-      ChosenTailFoldingStyle = std::make_pair(
+      ChosenTailFoldingStyle = {
           TTI.getPreferredTailFoldingStyle(/*IVUpdateMayOverflow=*/true),
-          TTI.getPreferredTailFoldingStyle(/*IVUpdateMayOverflow=*/false));
+          TTI.getPreferredTailFoldingStyle(/*IVUpdateMayOverflow=*/false)};
       return;
     }
 
     // Set styles when forced.
-    ChosenTailFoldingStyle = std::make_pair(ForceTailFoldingStyle.getValue(),
-                                            ForceTailFoldingStyle.getValue());
+    ChosenTailFoldingStyle = {ForceTailFoldingStyle.getValue(),
+                              ForceTailFoldingStyle.getValue()};
     if (ForceTailFoldingStyle != TailFoldingStyle::DataWithEVL)
       return;
     // Override forced styles if needed.
@@ -1375,9 +1371,8 @@ class LoopVectorizationCostModel {
       // If for some reason EVL mode is unsupported, fallback to
       // DataWithoutLaneMask to try to vectorize the loop with folded tail
       // in a generic way.
-      ChosenTailFoldingStyle =
-          std::make_pair(TailFoldingStyle::DataWithoutLaneMask,
-                         TailFoldingStyle::DataWithoutLaneMask);
+      ChosenTailFoldingStyle = {TailFoldingStyle::DataWithoutLaneMask,
+                                TailFoldingStyle::DataWithoutLaneMask};
       LLVM_DEBUG(
           dbgs()
           << "LV: Preference for VP intrinsics indicated. Will "
@@ -8138,7 +8133,7 @@ void VPRecipeBuilder::collectScaledReductions(VFRange &Range) {
     PartialReductionChain Chain = Pair.first;
     if (ExtendIsOnlyUsedByPartialReductions(Chain.ExtendA) &&
         ExtendIsOnlyUsedByPartialReductions(Chain.ExtendB))
-      ScaledReductionMap.insert(std::make_pair(Chain.Reduction, Pair.second));
+      ScaledReductionMap.try_emplace(Chain.Reduction, Pair.second);
   }
 }
 
@@ -8210,12 +8205,11 @@ bool VPRecipeBuilder::getScaledReductions(
           [&](ElementCount VF) {
             InstructionCost Cost = TTI->getPartialReductionCost(
                 Update->getOpcode(), A->getType(), B->getType(), PHI->getType(),
-                VF, OpAExtend, OpBExtend,
-                std::make_optional(BinOp->getOpcode()));
+                VF, OpAExtend, OpBExtend, BinOp->getOpcode());
             return Cost.isValid();
           },
           Range)) {
-    Chains.push_back(std::make_pair(Chain, TargetScaleFactor));
+    Chains.emplace_back(Chain, TargetScaleFactor);
     return true;
   }
 
@@ -10108,9 +10102,9 @@ bool LoopVectorizePass::processLoop(Loop *L) {
   bool VectorizeLoop = true, InterleaveLoop = true;
   if (VF.Width.isScalar()) {
     LLVM_DEBUG(dbgs() << "LV: Vectorization is possible but not beneficial.\n");
-    VecDiagMsg = std::make_pair(
+    VecDiagMsg = {
         "VectorizationNotBeneficial",
-        "the cost-model indicates that vectorization is not beneficial");
+        "the cost-model indicates that vectorization is not beneficial"};
     VectorizeLoop = false;
   }
 
@@ -10119,16 +10113,15 @@ bool LoopVectorizePass::processLoop(Loop *L) {
     // requested.
     LLVM_DEBUG(dbgs() << "LV: Ignoring UserIC, because vectorization and "
                          "interleaving should be avoided up front\n");
-    IntDiagMsg = std::make_pair(
-        "InterleavingAvoided",
-        "Ignoring UserIC, because interleaving was avoided up front");
+    IntDiagMsg = {"InterleavingAvoided",
+                  "Ignoring UserIC, because interleaving was avoided up front"};
     InterleaveLoop = false;
   } else if (IC == 1 && UserIC <= 1) {
     // Tell the user interleaving is not beneficial.
     LLVM_DEBUG(dbgs() << "LV: Interleaving is not beneficial.\n");
-    IntDiagMsg = std::make_pair(
+    IntDiagMsg = {
         "InterleavingNotBeneficial",
-        "the cost-model indicates that interleaving is not beneficial");
+        "the cost-model indicates that interleaving is not beneficial"};
     InterleaveLoop = false;
     if (UserIC == 1) {
       IntDiagMsg.first = "InterleavingNotBeneficialAndDisabled";
@@ -10139,10 +10132,9 @@ bool LoopVectorizePass::processLoop(Loop *L) {
     // Tell the user interleaving is beneficial, but it explicitly disabled.
     LLVM_DEBUG(
         dbgs() << "LV: Interleaving is beneficial but is explicitly disabled.");
-    IntDiagMsg = std::make_pair(
-        "InterleavingBeneficialButDisabled",
-        "the cost-model indicates that interleaving is beneficial "
-        "but is explicitly disabled or interleave count is set to 1");
+    IntDiagMsg = {"InterleavingBeneficialButDisabled",
+                  "the cost-model indicates that interleaving is beneficial "
+                  "but is explicitly disabled or interleave count is set to 1"};
     InterleaveLoop = false;
   }
 
@@ -10152,10 +10144,10 @@ bool LoopVectorizePass::processLoop(Loop *L) {
   if (!VectorizeLoop && InterleaveLoop && LVL.hasHistograms()) {
     LLVM_DEBUG(dbgs() << "LV: Not interleaving without vectorization due "
                       << "to histogram operations.\n");
-    IntDiagMsg = std::make_pair(
+    IntDiagMsg = {
         "HistogramPreventsScalarInterleaving",
         "Unable to interleave without vectorization due to constraints on "
-        "the order of histogram operations");
+        "the order of histogram operations"};
     InterleaveLoop = false;
   }