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[DAG] Keep the opaque constant flag when performing unary constant folding operations.

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Usually opaque constants shouldn't be folded, unless they are simple unary
operations that don't create new constants. Although this shouldn't drop the
opaque constant flag. This commit fixes this.

Related to <rdar://problem/14774662>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204737 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Juergen Ributzka 2014-03-25 18:01:20 +00:00
parent 6f4f46cf11
commit 6ac0491001
1 changed files with 12 additions and 6 deletions
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18
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -2541,11 +2541,13 @@ SDValue SelectionDAG::getNode(unsigned Opcode, SDLoc DL,
switch (Opcode) {
default: break;
case ISD::SIGN_EXTEND:
return getConstant(Val.sextOrTrunc(VT.getSizeInBits()), VT);
return getConstant(Val.sextOrTrunc(VT.getSizeInBits()), VT,
C->isTargetOpcode(), C->isOpaque());
case ISD::ANY_EXTEND:
case ISD::ZERO_EXTEND:
case ISD::TRUNCATE:
return getConstant(Val.zextOrTrunc(VT.getSizeInBits()), VT);
return getConstant(Val.zextOrTrunc(VT.getSizeInBits()), VT,
C->isTargetOpcode(), C->isOpaque());
case ISD::UINT_TO_FP:
case ISD::SINT_TO_FP: {
APFloat apf(EVTToAPFloatSemantics(VT),
@ -2562,15 +2564,19 @@ SDValue SelectionDAG::getNode(unsigned Opcode, SDLoc DL,
return getConstantFP(APFloat(APFloat::IEEEdouble, Val), VT);
break;
case ISD::BSWAP:
return getConstant(Val.byteSwap(), VT);
return getConstant(Val.byteSwap(), VT, C->isTargetOpcode(),
C->isOpaque());
case ISD::CTPOP:
return getConstant(Val.countPopulation(), VT);
return getConstant(Val.countPopulation(), VT, C->isTargetOpcode(),
C->isOpaque());
case ISD::CTLZ:
case ISD::CTLZ_ZERO_UNDEF:
return getConstant(Val.countLeadingZeros(), VT);
return getConstant(Val.countLeadingZeros(), VT, C->isTargetOpcode(),
C->isOpaque());
case ISD::CTTZ:
case ISD::CTTZ_ZERO_UNDEF:
return getConstant(Val.countTrailingZeros(), VT);
return getConstant(Val.countTrailingZeros(), VT, C->isTargetOpcode(),
C->isOpaque());
}
}