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Propagate debug loc info in DAG combine's "ADD".

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llvm-svn: 63366
This commit is contained in:
Bill Wendling 2009-01-30 02:31:17 +00:00
parent 030f0fced8
commit 1ad9d3d9d1
1 changed files with 18 additions and 20 deletions
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38
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -1016,7 +1016,7 @@ SDValue DAGCombiner::visitADD(SDNode *N) {
return DAG.FoldConstantArithmetic(ISD::ADD, VT, N0C, N1C);
// canonicalize constant to RHS
if (N0C && !N1C)
return DAG.getNode(ISD::ADD, VT, N1, N0);
return DAG.getNode(ISD::ADD, N->getDebugLoc(), VT, N1, N0);
// fold (add x, 0) -> x
if (N1C && N1C->isNullValue())
return N0;
@ -1030,7 +1030,7 @@ SDValue DAGCombiner::visitADD(SDNode *N) {
// fold ((c1-A)+c2) -> (c1+c2)-A
if (N1C && N0.getOpcode() == ISD::SUB)
if (ConstantSDNode *N0C = dyn_cast<ConstantSDNode>(N0.getOperand(0)))
return DAG.getNode(ISD::SUB, VT,
return DAG.getNode(ISD::SUB, N->getDebugLoc(), VT,
DAG.getConstant(N1C->getAPIntValue()+
N0C->getAPIntValue(), VT),
N0.getOperand(1));
@ -1041,11 +1041,11 @@ SDValue DAGCombiner::visitADD(SDNode *N) {
// fold ((0-A) + B) -> B-A
if (N0.getOpcode() == ISD::SUB && isa<ConstantSDNode>(N0.getOperand(0)) &&
cast<ConstantSDNode>(N0.getOperand(0))->isNullValue())
return DAG.getNode(ISD::SUB, VT, N1, N0.getOperand(1));
return DAG.getNode(ISD::SUB, N->getDebugLoc(), VT, N1, N0.getOperand(1));
// fold (A + (0-B)) -> A-B
if (N1.getOpcode() == ISD::SUB && isa<ConstantSDNode>(N1.getOperand(0)) &&
cast<ConstantSDNode>(N1.getOperand(0))->isNullValue())
return DAG.getNode(ISD::SUB, VT, N0, N1.getOperand(1));
return DAG.getNode(ISD::SUB, N->getDebugLoc(), VT, N0, N1.getOperand(1));
// fold (A+(B-A)) -> B
if (N1.getOpcode() == ISD::SUB && N0 == N1.getOperand(1))
return N1.getOperand(0);
@ -1054,23 +1054,20 @@ SDValue DAGCombiner::visitADD(SDNode *N) {
return N0.getOperand(0);
// fold (A+(B-(A+C))) to (B-C)
if (N1.getOpcode() == ISD::SUB && N1.getOperand(1).getOpcode() == ISD::ADD &&
N0 == N1.getOperand(1).getOperand(0)) {
return DAG.getNode(ISD::SUB, VT, N1.getOperand(0),
N0 == N1.getOperand(1).getOperand(0))
return DAG.getNode(ISD::SUB, N->getDebugLoc(), VT, N1.getOperand(0),
N1.getOperand(1).getOperand(1));
}
// fold (A+(B-(C+A))) to (B-C)
if (N1.getOpcode() == ISD::SUB && N1.getOperand(1).getOpcode() == ISD::ADD &&
N0 == N1.getOperand(1).getOperand(1)) {
return DAG.getNode(ISD::SUB, VT, N1.getOperand(0),
N0 == N1.getOperand(1).getOperand(1))
return DAG.getNode(ISD::SUB, N->getDebugLoc(), VT, N1.getOperand(0),
N1.getOperand(1).getOperand(0));
}
// fold (A+((B-A)+or-C)) to (B+or-C)
if ((N1.getOpcode() == ISD::SUB || N1.getOpcode() == ISD::ADD) &&
N1.getOperand(0).getOpcode() == ISD::SUB &&
N0 == N1.getOperand(0).getOperand(1)) {
return DAG.getNode(N1.getOpcode(), VT, N1.getOperand(0).getOperand(0),
N1.getOperand(1));
}
N0 == N1.getOperand(0).getOperand(1))
return DAG.getNode(N1.getOpcode(), N->getDebugLoc(), VT,
N1.getOperand(0).getOperand(0), N1.getOperand(1));
// fold (A-B)+(C-D) to (A+C)-(B+D) when A or C is constant
if (N0.getOpcode() == ISD::SUB && N1.getOpcode() == ISD::SUB) {
@ -1078,11 +1075,11 @@ SDValue DAGCombiner::visitADD(SDNode *N) {
SDValue N01 = N0.getOperand(1);
SDValue N10 = N1.getOperand(0);
SDValue N11 = N1.getOperand(1);
if (isa<ConstantSDNode>(N00) || isa<ConstantSDNode>(N10)) {
return DAG.getNode(ISD::SUB, VT,
DAG.getNode(ISD::ADD, VT, N00, N10),
DAG.getNode(ISD::ADD, VT, N01, N11));
}
if (isa<ConstantSDNode>(N00) || isa<ConstantSDNode>(N10))
return DAG.getNode(ISD::SUB, N->getDebugLoc(), VT,
DAG.getNode(ISD::ADD, N0.getDebugLoc(), VT, N00, N10),
DAG.getNode(ISD::ADD, N1.getDebugLoc(), VT, N01, N11));
}
if (!VT.isVector() && SimplifyDemandedBits(SDValue(N, 0)))
@ -1094,6 +1091,7 @@ SDValue DAGCombiner::visitADD(SDNode *N) {
APInt RHSZero, RHSOne;
APInt Mask = APInt::getAllOnesValue(VT.getSizeInBits());
DAG.ComputeMaskedBits(N0, Mask, LHSZero, LHSOne);
if (LHSZero.getBoolValue()) {
DAG.ComputeMaskedBits(N1, Mask, RHSZero, RHSOne);
@ -1101,7 +1099,7 @@ SDValue DAGCombiner::visitADD(SDNode *N) {
// If all possibly-set bits on the RHS are clear on the LHS, return an OR.
if ((RHSZero & (~LHSZero & Mask)) == (~LHSZero & Mask) ||
(LHSZero & (~RHSZero & Mask)) == (~RHSZero & Mask))
return DAG.getNode(ISD::OR, VT, N0, N1);
return DAG.getNode(ISD::OR, N->getDebugLoc(), VT, N0, N1);
}
}