[llvm] r288814 - Avoid repeated calls to Op.getOpcode(). NFCI.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Tue Dec  6 08:50:09 2016
New Revision: 288814

URL: http://llvm.org/viewvc/llvm-project?rev=288814&view=rev
Log:
Avoid repeated calls to Op.getOpcode(). NFCI.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAG.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAG.cpp?rev=288814&r1=288813&r2=288814&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAG.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAG.cpp Tue Dec  6 08:50:09 2016
@@ -2039,7 +2039,8 @@ void SelectionDAG::computeKnownBits(SDVa
   if (!DemandedElts)
     return;  // No demanded elts, better to assume we don't know anything.
 
-  switch (Op.getOpcode()) {
+  unsigned Opcode = Op.getOpcode();
+  switch (Opcode) {
   case ISD::Constant:
     // We know all of the bits for a constant!
     KnownOne = cast<ConstantSDNode>(Op)->getAPIntValue();
@@ -2478,7 +2479,7 @@ void SelectionDAG::computeKnownBits(SDVa
     KnownZeroLow = std::min(KnownZeroLow,
                             KnownZero2.countTrailingOnes());
 
-    if (Op.getOpcode() == ISD::ADD) {
+    if (Opcode == ISD::ADD) {
       KnownZero |= APInt::getLowBitsSet(BitWidth, KnownZeroLow);
       if (KnownZeroHigh > 1)
         KnownZero |= APInt::getHighBitsSet(BitWidth, KnownZeroHigh - 1);
@@ -2622,7 +2623,7 @@ void SelectionDAG::computeKnownBits(SDVa
     break;
 
   default:
-    if (Op.getOpcode() < ISD::BUILTIN_OP_END)
+    if (Opcode < ISD::BUILTIN_OP_END)
       break;
     LLVM_FALLTHROUGH;
   case ISD::INTRINSIC_WO_CHAIN: