[LegalizeTypes] Pre-size the SmallVectors in ScalarizeVecRes_StrictFPOp and SplitVecRes_StrictFPOp so we don't have to call push_back. NFCI

This avoids grow checking/handling in each iteration of the loop.

1 files changed, 9 insertions, 9 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
index 7df68113104..200dacd27bc 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
@@ -204,10 +204,10 @@ SDValue DAGTypeLegalizer::ScalarizeVecRes_StrictFPOp(SDNode *N) {
   EVT ValueVTs[] = {VT, MVT::Other};
   SDLoc dl(N);
 
-  SmallVector<SDValue, 4> Opers;
+  SmallVector<SDValue, 4> Opers(NumOpers);
 
   // The Chain is the first operand.
-  Opers.push_back(Chain);
+  Opers[0] = Chain;
 
   // Now process the remaining operands.
   for (unsigned i = 1; i < NumOpers; ++i) {
@@ -216,7 +216,7 @@ SDValue DAGTypeLegalizer::ScalarizeVecRes_StrictFPOp(SDNode *N) {
     if (Oper.getValueType().isVector())
       Oper = GetScalarizedVector(Oper);
 
-    Opers.push_back(Oper);
+    Opers[i] = Oper;
   }
 
   SDValue Result = DAG.getNode(N->getOpcode(), dl, ValueVTs, Opers);
@@ -1245,12 +1245,12 @@ void DAGTypeLegalizer::SplitVecRes_StrictFPOp(SDNode *N, SDValue &Lo,
   SDLoc dl(N);
   std::tie(LoVT, HiVT) = DAG.GetSplitDestVTs(N->getValueType(0));
 
-  SmallVector<SDValue, 4> OpsLo;
-  SmallVector<SDValue, 4> OpsHi;
+  SmallVector<SDValue, 4> OpsLo(NumOps);
+  SmallVector<SDValue, 4> OpsHi(NumOps);
 
   // The Chain is the first operand.
-  OpsLo.push_back(Chain);
-  OpsHi.push_back(Chain);
+  OpsLo[0] = Chain;
+  OpsHi[0] = Chain;
 
   // Now process the remaining operands.
   for (unsigned i = 1; i < NumOps; ++i) {
@@ -1268,8 +1268,8 @@ void DAGTypeLegalizer::SplitVecRes_StrictFPOp(SDNode *N, SDValue &Lo,
         std::tie(OpLo, OpHi) = DAG.SplitVectorOperand(N, i);
     }
 
-    OpsLo.push_back(OpLo);
-    OpsHi.push_back(OpHi);
+    OpsLo[i] = OpLo;
+    OpsHi[i] = OpHi;
   }
 
   EVT LoValueVTs[] = {LoVT, MVT::Other};