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PR5207: Change APInt methods trunc(), sext(), zext(), sextOrTrunc() and

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zextOrTrunc(), and APSInt methods extend(), extOrTrunc() and new method
trunc(), to be const and to return a new value instead of modifying the
object in place.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121120 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jay Foad
2010-12-07 08:25:19 +00:00
parent 0ea112f104
commit 40f8f6264d
25 changed files with 219 additions and 251 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+11 -11
View File
@@ -2133,7 +2133,7 @@ SDValue DAGCombiner::visitAND(SDNode *N) {
if (N1C && N0.getOpcode() == ISD::ANY_EXTEND) {
SDValue N0Op0 = N0.getOperand(0);
APInt Mask = ~N1C->getAPIntValue();
Mask.trunc(N0Op0.getValueSizeInBits());
Mask = Mask.trunc(N0Op0.getValueSizeInBits());
if (DAG.MaskedValueIsZero(N0Op0, Mask)) {
SDValue Zext = DAG.getNode(ISD::ZERO_EXTEND, N->getDebugLoc(),
N0.getValueType(), N0Op0);
@@ -2866,7 +2866,7 @@ SDValue DAGCombiner::visitSHL(SDNode *N) {
EVT TruncVT = N1.getValueType();
SDValue N100 = N1.getOperand(0).getOperand(0);
APInt TruncC = N101C->getAPIntValue();
TruncC.trunc(TruncVT.getSizeInBits());
TruncC = TruncC.trunc(TruncVT.getSizeInBits());
return DAG.getNode(ISD::SHL, N->getDebugLoc(), VT, N0,
DAG.getNode(ISD::AND, N->getDebugLoc(), TruncVT,
DAG.getNode(ISD::TRUNCATE,
@@ -3022,7 +3022,7 @@ SDValue DAGCombiner::visitSRA(SDNode *N) {
EVT TruncVT = N1.getValueType();
SDValue N100 = N1.getOperand(0).getOperand(0);
APInt TruncC = N101C->getAPIntValue();
TruncC.trunc(TruncVT.getScalarType().getSizeInBits());
TruncC = TruncC.trunc(TruncVT.getScalarType().getSizeInBits());
return DAG.getNode(ISD::SRA, N->getDebugLoc(), VT, N0,
DAG.getNode(ISD::AND, N->getDebugLoc(),
TruncVT,
@@ -3163,7 +3163,7 @@ SDValue DAGCombiner::visitSRL(SDNode *N) {
EVT TruncVT = N1.getValueType();
SDValue N100 = N1.getOperand(0).getOperand(0);
APInt TruncC = N101C->getAPIntValue();
TruncC.trunc(TruncVT.getSizeInBits());
TruncC = TruncC.trunc(TruncVT.getSizeInBits());
return DAG.getNode(ISD::SRL, N->getDebugLoc(), VT, N0,
DAG.getNode(ISD::AND, N->getDebugLoc(),
TruncVT,
@@ -3706,7 +3706,7 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) {
X = DAG.getNode(ISD::TRUNCATE, X.getDebugLoc(), VT, X);
}
APInt Mask = cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue();
Mask.zext(VT.getSizeInBits());
Mask = Mask.zext(VT.getSizeInBits());
return DAG.getNode(ISD::AND, N->getDebugLoc(), VT,
X, DAG.getConstant(Mask, VT));
}
@@ -3907,7 +3907,7 @@ SDValue DAGCombiner::visitANY_EXTEND(SDNode *N) {
X = DAG.getNode(ISD::TRUNCATE, N->getDebugLoc(), VT, X);
}
APInt Mask = cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue();
Mask.zext(VT.getSizeInBits());
Mask = Mask.zext(VT.getSizeInBits());
return DAG.getNode(ISD::AND, N->getDebugLoc(), VT,
X, DAG.getConstant(Mask, VT));
}
@@ -4614,7 +4614,7 @@ ConstantFoldBITCASTofBUILD_VECTOR(SDNode *BV, EVT DstEltVT) {
if (Op.getOpcode() == ISD::UNDEF) continue;
EltIsUndef = false;
NewBits |= APInt(cast<ConstantSDNode>(Op)->getAPIntValue()).
NewBits |= cast<ConstantSDNode>(Op)->getAPIntValue().
zextOrTrunc(SrcBitSize).zext(DstBitSize);
}
@@ -4644,13 +4644,13 @@ ConstantFoldBITCASTofBUILD_VECTOR(SDNode *BV, EVT DstEltVT) {
continue;
}
APInt OpVal = APInt(cast<ConstantSDNode>(BV->getOperand(i))->
getAPIntValue()).zextOrTrunc(SrcBitSize);
APInt OpVal = cast<ConstantSDNode>(BV->getOperand(i))->
getAPIntValue().zextOrTrunc(SrcBitSize);
for (unsigned j = 0; j != NumOutputsPerInput; ++j) {
APInt ThisVal = APInt(OpVal).trunc(DstBitSize);
APInt ThisVal = OpVal.trunc(DstBitSize);
Ops.push_back(DAG.getConstant(ThisVal, DstEltVT));
if (isS2V && i == 0 && j == 0 && APInt(ThisVal).zext(SrcBitSize) == OpVal)
if (isS2V && i == 0 && j == 0 && ThisVal.zext(SrcBitSize) == OpVal)
// Simply turn this into a SCALAR_TO_VECTOR of the new type.
return DAG.getNode(ISD::SCALAR_TO_VECTOR, BV->getDebugLoc(), VT,
Ops[0]);