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Avoid repeated calls to Op.getOpcode(). NFCI. 

llvm-svn: 288814
This commit is contained in:
Simon Pilgrim 2016-12-06 14:50:09 +00:00
parent f92d44c673
commit 29c17f3f58
1 changed files with 4 additions and 3 deletions
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7
llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -2039,7 +2039,8 @@ void SelectionDAG::computeKnownBits(SDValue Op, APInt &KnownZero,
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(SDValue Op, APInt &KnownZero,
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(SDValue Op, APInt &KnownZero,
break;
default:
if (Op.getOpcode() < ISD::BUILTIN_OP_END)
if (Opcode < ISD::BUILTIN_OP_END)
break;
LLVM_FALLTHROUGH;
case ISD::INTRINSIC_WO_CHAIN: