Convert push_back loops into append calls.

[oota-llvm.git] / lib / Target / X86 / X86ISelLowering.cpp

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 4bd1a0cc85914e4b8a60c4fac667428ed1d01875..d39dea85788dac8cff2ab0284d55634c7939b66a 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -16255,7 +16255,7 @@ static SDValue LowerShift(SDValue Op, const X86Subtarget* Subtarget,
     Amt = DAG.getNode(ISD::ANY_EXTEND, dl, NewVT, Amt);
     return DAG.getNode(ISD::TRUNCATE, dl, VT,
                        DAG.getNode(Op.getOpcode(), dl, NewVT, R, Amt));
-    }
+  }
 
   // Decompose 256-bit shifts into smaller 128-bit shifts.
   if (VT.is256BitVector()) {
@@ -16271,12 +16271,9 @@ static SDValue LowerShift(SDValue Op, const X86Subtarget* Subtarget,
     SDValue Amt1, Amt2;
     if (Amt.getOpcode() == ISD::BUILD_VECTOR) {
       // Constant shift amount
-      SmallVector<SDValue, 4> Amt1Csts;
-      SmallVector<SDValue, 4> Amt2Csts;
-      for (unsigned i = 0; i != NumElems/2; ++i)
-        Amt1Csts.push_back(Amt->getOperand(i));
-      for (unsigned i = NumElems/2; i != NumElems; ++i)
-        Amt2Csts.push_back(Amt->getOperand(i));
+      SmallVector<SDValue, 8> Ops(Amt->op_begin(), Amt->op_begin() + NumElems);
+      ArrayRef<SDValue> Amt1Csts = makeArrayRef(Ops).slice(0, NumElems / 2);
+      ArrayRef<SDValue> Amt2Csts = makeArrayRef(Ops).slice(NumElems / 2);
 
       Amt1 = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT, Amt1Csts);
       Amt2 = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT, Amt2Csts);