[X86] IsElementEquivalent - pull out repeated getValueType calls. NFC.

Author: RKSimon

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -9789,6 +9789,7 @@ static bool IsElementEquivalent(int MaskSize, SDValue Op, SDValue ExpectedOp,
   if (!Op || !ExpectedOp || Op.getOpcode() != ExpectedOp.getOpcode())
     return false;
 
+  EVT VT = Op.getValueType();
   switch (Op.getOpcode()) {
   case ISD::BUILD_VECTOR:
     // If the values are build vectors, we can look through them to find
@@ -9800,9 +9801,8 @@ static bool IsElementEquivalent(int MaskSize, SDValue Op, SDValue ExpectedOp,
     break;
   case X86ISD::VBROADCAST:
   case X86ISD::VBROADCAST_LOAD:
-    // TODO: Handle MaskSize != Op.getValueType().getVectorNumElements()?
-    return (Op == ExpectedOp &&
-            (int)Op.getValueType().getVectorNumElements() == MaskSize);
+    // TODO: Handle MaskSize != VT.getVectorNumElements()?
+    return (Op == ExpectedOp && (int)VT.getVectorNumElements() == MaskSize);
   case X86ISD::HADD:
   case X86ISD::HSUB:
   case X86ISD::FHADD:
@@ -9813,7 +9813,6 @@ static bool IsElementEquivalent(int MaskSize, SDValue Op, SDValue ExpectedOp,
     // TODO: Handle MaskSize != NumElts?
     // TODO: Handle HOP(X,Y) vs HOP(Y,X) equivalence cases.
     if (Op == ExpectedOp && Op.getOperand(0) == Op.getOperand(1)) {
-      MVT VT = Op.getSimpleValueType();
       int NumElts = VT.getVectorNumElements();
       if (MaskSize == NumElts) {
         int NumLanes = VT.getSizeInBits() / 128;