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Propagate debug loc info for some of the *_EXTEND functions. 

llvm-svn: 63434
This commit is contained in:
Bill Wendling 2009-01-30 22:23:15 +00:00
parent cab9a2eef5
commit c409318562
3 changed files with 64 additions and 33 deletions
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1
llvm/include/llvm/CodeGen/SelectionDAG.h
View File

@ -376,6 +376,7 @@ public:
/// getZeroExtendInReg - Return the expression required to zero extend the Op
/// value assuming it was the smaller SrcTy value.
SDValue getZeroExtendInReg(SDValue Op, MVT SrcTy);
SDValue getZeroExtendInReg(SDValue Op, DebugLoc DL, MVT SrcTy);
/// getNOT - Create a bitwise NOT operation as (XOR Val, -1).
SDValue getNOT(SDValue Val, MVT VT);

88
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
View File

@ -2914,7 +2914,7 @@ SDValue DAGCombiner::visitSELECT_CC(SDNode *N) {
// Fold to a simpler select_cc
if (SCC.getNode() && SCC.getOpcode() == ISD::SETCC)
return DAG.getNode(ISD::SELECT_CC, N2.getValueType(),
return DAG.getNode(ISD::SELECT_CC, N->getDebugLoc(), N2.getValueType(),
SCC.getOperand(0), SCC.getOperand(1), N2, N3,
SCC.getOperand(2));
@ -3006,12 +3006,13 @@ SDValue DAGCombiner::visitSIGN_EXTEND(SDNode *N) {
// fold (sext c1) -> c1
if (isa<ConstantSDNode>(N0))
return DAG.getNode(ISD::SIGN_EXTEND, VT, N0);
return DAG.getNode(ISD::SIGN_EXTEND, N->getDebugLoc(), VT, N0);
// fold (sext (sext x)) -> (sext x)
// fold (sext (aext x)) -> (sext x)
if (N0.getOpcode() == ISD::SIGN_EXTEND || N0.getOpcode() == ISD::ANY_EXTEND)
return DAG.getNode(ISD::SIGN_EXTEND, VT, N0.getOperand(0));
return DAG.getNode(ISD::SIGN_EXTEND, N->getDebugLoc(), VT,
N0.getOperand(0));
if (N0.getOpcode() == ISD::TRUNCATE) {
// fold (sext (truncate (load x))) -> (sext (smaller load x))
@ -3020,7 +3021,7 @@ SDValue DAGCombiner::visitSIGN_EXTEND(SDNode *N) {
if (NarrowLoad.getNode()) {
if (NarrowLoad.getNode() != N0.getNode())
CombineTo(N0.getNode(), NarrowLoad);
return DAG.getNode(ISD::SIGN_EXTEND, VT, NarrowLoad);
return DAG.getNode(ISD::SIGN_EXTEND, N->getDebugLoc(), VT, NarrowLoad);
}
// See if the value being truncated is already sign extended. If so, just
@ -3040,22 +3041,22 @@ SDValue DAGCombiner::visitSIGN_EXTEND(SDNode *N) {
// Op is i32, Mid is i8, and Dest is i64. If Op has more than 24 sign
// bits, just sext from i32.
if (NumSignBits > OpBits-MidBits)
return DAG.getNode(ISD::SIGN_EXTEND, VT, Op);
return DAG.getNode(ISD::SIGN_EXTEND, N->getDebugLoc(), VT, Op);
} else {
// Op is i64, Mid is i8, and Dest is i32. If Op has more than 56 sign
// bits, just truncate to i32.
if (NumSignBits > OpBits-MidBits)
return DAG.getNode(ISD::TRUNCATE, VT, Op);
return DAG.getNode(ISD::TRUNCATE, N->getDebugLoc(), VT, Op);
}
// fold (sext (truncate x)) -> (sextinreg x).
if (!LegalOperations || TLI.isOperationLegal(ISD::SIGN_EXTEND_INREG,
N0.getValueType())) {
if (Op.getValueType().bitsLT(VT))
Op = DAG.getNode(ISD::ANY_EXTEND, VT, Op);
Op = DAG.getNode(ISD::ANY_EXTEND, N0.getDebugLoc(), VT, Op);
else if (Op.getValueType().bitsGT(VT))
Op = DAG.getNode(ISD::TRUNCATE, VT, Op);
return DAG.getNode(ISD::SIGN_EXTEND_INREG, VT, Op,
Op = DAG.getNode(ISD::TRUNCATE, N0.getDebugLoc(), VT, Op);
return DAG.getNode(ISD::SIGN_EXTEND_INREG, N->getDebugLoc(), VT, Op,
DAG.getValueType(N0.getValueType()));
}
}
@ -3070,29 +3071,37 @@ SDValue DAGCombiner::visitSIGN_EXTEND(SDNode *N) {
DoXform = ExtendUsesToFormExtLoad(N, N0, ISD::SIGN_EXTEND, SetCCs, TLI);
if (DoXform) {
LoadSDNode *LN0 = cast<LoadSDNode>(N0);
SDValue ExtLoad = DAG.getExtLoad(ISD::SEXTLOAD, VT, LN0->getChain(),
SDValue ExtLoad = DAG.getExtLoad(ISD::SEXTLOAD, N->getDebugLoc(),
VT, LN0->getChain(),
LN0->getBasePtr(), LN0->getSrcValue(),
LN0->getSrcValueOffset(),
N0.getValueType(),
LN0->isVolatile(), LN0->getAlignment());
CombineTo(N, ExtLoad);
SDValue Trunc = DAG.getNode(ISD::TRUNCATE, N0.getValueType(), ExtLoad);
SDValue Trunc = DAG.getNode(ISD::TRUNCATE, N0.getDebugLoc(),
N0.getValueType(), ExtLoad);
CombineTo(N0.getNode(), Trunc, ExtLoad.getValue(1));
// Extend SetCC uses if necessary.
for (unsigned i = 0, e = SetCCs.size(); i != e; ++i) {
SDNode *SetCC = SetCCs[i];
SmallVector<SDValue, 4> Ops;
for (unsigned j = 0; j != 2; ++j) {
SDValue SOp = SetCC->getOperand(j);
if (SOp == Trunc)
Ops.push_back(ExtLoad);
else
Ops.push_back(DAG.getNode(ISD::SIGN_EXTEND, VT, SOp));
}
Ops.push_back(DAG.getNode(ISD::SIGN_EXTEND, DebugLoc::getUnknownLoc(),
VT, SOp));
}
Ops.push_back(SetCC->getOperand(2));
CombineTo(SetCC, DAG.getNode(ISD::SETCC, SetCC->getValueType(0),
CombineTo(SetCC, DAG.getNode(ISD::SETCC, DebugLoc::getUnknownLoc(),
SetCC->getValueType(0),
&Ops[0], Ops.size()));
}
return SDValue(N, 0); // Return N so it doesn't get rechecked!
}
}
@ -3105,19 +3114,21 @@ SDValue DAGCombiner::visitSIGN_EXTEND(SDNode *N) {
MVT EVT = LN0->getMemoryVT();
if ((!LegalOperations && !LN0->isVolatile()) ||
TLI.isLoadExtLegal(ISD::SEXTLOAD, EVT)) {
SDValue ExtLoad = DAG.getExtLoad(ISD::SEXTLOAD, VT, LN0->getChain(),
SDValue ExtLoad = DAG.getExtLoad(ISD::SEXTLOAD, N->getDebugLoc(), VT,
LN0->getChain(),
LN0->getBasePtr(), LN0->getSrcValue(),
LN0->getSrcValueOffset(), EVT,
LN0->isVolatile(), LN0->getAlignment());
CombineTo(N, ExtLoad);
CombineTo(N0.getNode(),
DAG.getNode(ISD::TRUNCATE, N0.getValueType(), ExtLoad),
DAG.getNode(ISD::TRUNCATE, N0.getDebugLoc(),
N0.getValueType(), ExtLoad),
ExtLoad.getValue(1));
return SDValue(N, 0); // Return N so it doesn't get rechecked!
}
}
// sext(setcc x,y,cc) -> select_cc x, y, -1, 0, cc
// sext(setcc x, y, cc) -> (select_cc x, y, -1, 0, cc)
if (N0.getOpcode() == ISD::SETCC) {
SDValue SCC =
SimplifySelectCC(N0.getOperand(0), N0.getOperand(1),
@ -3129,7 +3140,7 @@ SDValue DAGCombiner::visitSIGN_EXTEND(SDNode *N) {
// fold (sext x) -> (zext x) if the sign bit is known zero.
if ((!LegalOperations || TLI.isOperationLegal(ISD::ZERO_EXTEND, VT)) &&
DAG.SignBitIsZero(N0))
return DAG.getNode(ISD::ZERO_EXTEND, VT, N0);
return DAG.getNode(ISD::ZERO_EXTEND, N->getDebugLoc(), VT, N0);
return SDValue();
}
@ -3140,11 +3151,12 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) {
// fold (zext c1) -> c1
if (isa<ConstantSDNode>(N0))
return DAG.getNode(ISD::ZERO_EXTEND, VT, N0);
return DAG.getNode(ISD::ZERO_EXTEND, N->getDebugLoc(), VT, N0);
// fold (zext (zext x)) -> (zext x)
// fold (zext (aext x)) -> (zext x)
if (N0.getOpcode() == ISD::ZERO_EXTEND || N0.getOpcode() == ISD::ANY_EXTEND)
return DAG.getNode(ISD::ZERO_EXTEND, VT, N0.getOperand(0));
return DAG.getNode(ISD::ZERO_EXTEND, N->getDebugLoc(), VT,
N0.getOperand(0));
// fold (zext (truncate (load x))) -> (zext (smaller load x))
// fold (zext (truncate (srl (load x), c))) -> (zext (small load (x+c/n)))
@ -3153,7 +3165,7 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) {
if (NarrowLoad.getNode()) {
if (NarrowLoad.getNode() != N0.getNode())
CombineTo(N0.getNode(), NarrowLoad);
return DAG.getNode(ISD::ZERO_EXTEND, VT, NarrowLoad);
return DAG.getNode(ISD::ZERO_EXTEND, N->getDebugLoc(), VT, NarrowLoad);
}
}
@ -3162,11 +3174,11 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) {
(!LegalOperations || TLI.isOperationLegal(ISD::AND, VT))) {
SDValue Op = N0.getOperand(0);
if (Op.getValueType().bitsLT(VT)) {
Op = DAG.getNode(ISD::ANY_EXTEND, VT, Op);
Op = DAG.getNode(ISD::ANY_EXTEND, DebugLoc::getUnknownLoc(), VT, Op);
} else if (Op.getValueType().bitsGT(VT)) {
Op = DAG.getNode(ISD::TRUNCATE, VT, Op);
Op = DAG.getNode(ISD::TRUNCATE, DebugLoc::getUnknownLoc(), VT, Op);
}
return DAG.getZeroExtendInReg(Op, N0.getValueType());
return DAG.getZeroExtendInReg(Op, N->getDebugLoc(), N0.getValueType());
}
// fold (zext (and (trunc x), cst)) -> (and x, cst).
@ -3175,13 +3187,14 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) {
N0.getOperand(1).getOpcode() == ISD::Constant) {
SDValue X = N0.getOperand(0).getOperand(0);
if (X.getValueType().bitsLT(VT)) {
X = DAG.getNode(ISD::ANY_EXTEND, VT, X);
X = DAG.getNode(ISD::ANY_EXTEND, DebugLoc::getUnknownLoc(), VT, X);
} else if (X.getValueType().bitsGT(VT)) {
X = DAG.getNode(ISD::TRUNCATE, VT, X);
X = DAG.getNode(ISD::TRUNCATE, DebugLoc::getUnknownLoc(), VT, X);
}
APInt Mask = cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue();
Mask.zext(VT.getSizeInBits());
return DAG.getNode(ISD::AND, VT, X, DAG.getConstant(Mask, VT));
return DAG.getNode(ISD::AND, N->getDebugLoc(), VT,
X, DAG.getConstant(Mask, VT));
}
// fold (zext (load x)) -> (zext (truncate (zextload x)))
@ -3194,29 +3207,36 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) {
DoXform = ExtendUsesToFormExtLoad(N, N0, ISD::ZERO_EXTEND, SetCCs, TLI);
if (DoXform) {
LoadSDNode *LN0 = cast<LoadSDNode>(N0);
SDValue ExtLoad = DAG.getExtLoad(ISD::ZEXTLOAD, VT, LN0->getChain(),
SDValue ExtLoad = DAG.getExtLoad(ISD::ZEXTLOAD, N->getDebugLoc(), VT,
LN0->getChain(),
LN0->getBasePtr(), LN0->getSrcValue(),
LN0->getSrcValueOffset(),
N0.getValueType(),
LN0->isVolatile(), LN0->getAlignment());
CombineTo(N, ExtLoad);
SDValue Trunc = DAG.getNode(ISD::TRUNCATE, N0.getValueType(), ExtLoad);
SDValue Trunc = DAG.getNode(ISD::TRUNCATE, N0.getDebugLoc(),
N0.getValueType(), ExtLoad);
CombineTo(N0.getNode(), Trunc, ExtLoad.getValue(1));
// Extend SetCC uses if necessary.
for (unsigned i = 0, e = SetCCs.size(); i != e; ++i) {
SDNode *SetCC = SetCCs[i];
SmallVector<SDValue, 4> Ops;
for (unsigned j = 0; j != 2; ++j) {
SDValue SOp = SetCC->getOperand(j);
if (SOp == Trunc)
Ops.push_back(ExtLoad);
else
Ops.push_back(DAG.getNode(ISD::ZERO_EXTEND, VT, SOp));
}
}
Ops.push_back(SetCC->getOperand(2));
CombineTo(SetCC, DAG.getNode(ISD::SETCC, SetCC->getValueType(0),
CombineTo(SetCC, DAG.getNode(ISD::SETCC, DebugLoc::getUnknownLoc(),
SetCC->getValueType(0),
&Ops[0], Ops.size()));
}
return SDValue(N, 0); // Return N so it doesn't get rechecked!
}
}
@ -3229,13 +3249,15 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) {
MVT EVT = LN0->getMemoryVT();
if ((!LegalOperations && !LN0->isVolatile()) ||
TLI.isLoadExtLegal(ISD::ZEXTLOAD, EVT)) {
SDValue ExtLoad = DAG.getExtLoad(ISD::ZEXTLOAD, VT, LN0->getChain(),
SDValue ExtLoad = DAG.getExtLoad(ISD::ZEXTLOAD, N->getDebugLoc(), VT,
LN0->getChain(),
LN0->getBasePtr(), LN0->getSrcValue(),
LN0->getSrcValueOffset(), EVT,
LN0->isVolatile(), LN0->getAlignment());
CombineTo(N, ExtLoad);
CombineTo(N0.getNode(),
DAG.getNode(ISD::TRUNCATE, N0.getValueType(), ExtLoad),
DAG.getNode(ISD::TRUNCATE, N0.getDebugLoc(), N0.getValueType(),
ExtLoad),
ExtLoad.getValue(1));
return SDValue(N, 0); // Return N so it doesn't get rechecked!
}

8
llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
View File

@ -831,6 +831,14 @@ SDValue SelectionDAG::getZeroExtendInReg(SDValue Op, MVT VT) {
getConstant(Imm, Op.getValueType()));
}
SDValue SelectionDAG::getZeroExtendInReg(SDValue Op, DebugLoc DL, MVT VT) {
if (Op.getValueType() == VT) return Op;
APInt Imm = APInt::getLowBitsSet(Op.getValueSizeInBits(),
VT.getSizeInBits());
return getNode(ISD::AND, DL, Op.getValueType(), Op,
getConstant(Imm, Op.getValueType()));
}
/// getNOT - Create a bitwise NOT operation as (XOR Val, -1).
///
SDValue SelectionDAG::getNOT(SDValue Val, MVT VT) {