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More DebugLoc propagation in LOAD etc. methods.

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llvm-svn: 63451
This commit is contained in:
Bill Wendling 2009-01-30 23:27:35 +00:00
parent 7eb7de0393
commit 061530382c
1 changed files with 42 additions and 26 deletions
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68
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -4367,14 +4367,14 @@ SDValue DAGCombiner::visitFABS(SDNode *N) {
// fold (fabs c1) -> fabs(c1)
if (N0CFP && VT != MVT::ppcf128)
return DAG.getNode(ISD::FABS, VT, N0);
return DAG.getNode(ISD::FABS, N->getDebugLoc(), VT, N0);
// fold (fabs (fabs x)) -> (fabs x)
if (N0.getOpcode() == ISD::FABS)
return N->getOperand(0);
// fold (fabs (fneg x)) -> (fabs x)
// fold (fabs (fcopysign x, y)) -> (fabs x)
if (N0.getOpcode() == ISD::FNEG || N0.getOpcode() == ISD::FCOPYSIGN)
return DAG.getNode(ISD::FABS, VT, N0.getOperand(0));
return DAG.getNode(ISD::FABS, N->getDebugLoc(), VT, N0.getOperand(0));
// Transform fabs(bitconvert(x)) -> bitconvert(x&~sign) to avoid loading
// constant pool values.
@ -4384,10 +4384,11 @@ SDValue DAGCombiner::visitFABS(SDNode *N) {
SDValue Int = N0.getOperand(0);
MVT IntVT = Int.getValueType();
if (IntVT.isInteger() && !IntVT.isVector()) {
Int = DAG.getNode(ISD::AND, IntVT, Int,
Int = DAG.getNode(ISD::AND, DebugLoc::getUnknownLoc(), IntVT, Int,
DAG.getConstant(~IntVT.getIntegerVTSignBit(), IntVT));
AddToWorkList(Int.getNode());
return DAG.getNode(ISD::BIT_CONVERT, N->getValueType(0), Int);
return DAG.getNode(ISD::BIT_CONVERT, N->getDebugLoc(),
N->getValueType(0), Int);
}
}
@ -4405,14 +4406,16 @@ SDValue DAGCombiner::visitBRCOND(SDNode *N) {
return Chain;
// unconditional branch
if (N1C && N1C->getAPIntValue() == 1)
return DAG.getNode(ISD::BR, MVT::Other, Chain, N2);
return DAG.getNode(ISD::BR, N->getDebugLoc(), MVT::Other, Chain, N2);
// fold a brcond with a setcc condition into a BR_CC node if BR_CC is legal
// on the target.
if (N1.getOpcode() == ISD::SETCC &&
TLI.isOperationLegalOrCustom(ISD::BR_CC, MVT::Other)) {
return DAG.getNode(ISD::BR_CC, MVT::Other, Chain, N1.getOperand(2),
return DAG.getNode(ISD::BR_CC, N->getDebugLoc(), MVT::Other,
Chain, N1.getOperand(2),
N1.getOperand(0), N1.getOperand(1), N2);
}
return SDValue();
}
@ -4431,21 +4434,22 @@ SDValue DAGCombiner::visitBR_CC(SDNode *N) {
// fold br_cc true, dest -> br dest (unconditional branch)
if (SCCC && !SCCC->isNullValue())
return DAG.getNode(ISD::BR, MVT::Other, N->getOperand(0),
N->getOperand(4));
return DAG.getNode(ISD::BR, N->getDebugLoc(), MVT::Other,
N->getOperand(0), N->getOperand(4));
// fold br_cc false, dest -> unconditional fall through
if (SCCC && SCCC->isNullValue())
return N->getOperand(0);
// fold to a simpler setcc
if (Simp.getNode() && Simp.getOpcode() == ISD::SETCC)
return DAG.getNode(ISD::BR_CC, MVT::Other, N->getOperand(0),
Simp.getOperand(2), Simp.getOperand(0),
Simp.getOperand(1), N->getOperand(4));
return DAG.getNode(ISD::BR_CC, N->getDebugLoc(), MVT::Other,
N->getOperand(0), Simp.getOperand(2),
Simp.getOperand(0), Simp.getOperand(1),
N->getOperand(4));
return SDValue();
}
/// CombineToPreIndexedLoadStore - Try turning a load / store into a
/// pre-indexed load / store when the base pointer is an add or subtract
/// and it has other uses besides the load / store. After the
@ -4476,8 +4480,9 @@ bool DAGCombiner::CombineToPreIndexedLoadStore(SDNode *N) {
return false;
Ptr = ST->getBasePtr();
isLoad = false;
} else
} else {
return false;
}
// If the pointer is not an add/sub, or if it doesn't have multiple uses, bail
// out. There is no reason to make this a preinc/predec.
@ -4532,14 +4537,17 @@ bool DAGCombiner::CombineToPreIndexedLoadStore(SDNode *N) {
cast<StoreSDNode>(Use)->getBasePtr() == Ptr)))
RealUse = true;
}
if (!RealUse)
return false;
SDValue Result;
if (isLoad)
Result = DAG.getIndexedLoad(SDValue(N,0), BasePtr, Offset, AM);
Result = DAG.getIndexedLoad(SDValue(N,0), N->getDebugLoc(),
BasePtr, Offset, AM);
else
Result = DAG.getIndexedStore(SDValue(N,0), BasePtr, Offset, AM);
Result = DAG.getIndexedStore(SDValue(N,0), N->getDebugLoc(),
BasePtr, Offset, AM);
++PreIndexedNodes;
++NodesCombined;
DOUT << "\nReplacing.4 "; DEBUG(N->dump(&DAG));
@ -4597,8 +4605,9 @@ bool DAGCombiner::CombineToPostIndexedLoadStore(SDNode *N) {
return false;
Ptr = ST->getBasePtr();
isLoad = false;
} else
} else {
return false;
}
if (Ptr.getNode()->hasOneUse())
return false;
@ -4657,14 +4666,17 @@ bool DAGCombiner::CombineToPostIndexedLoadStore(SDNode *N) {
}
}
}
if (TryNext)
continue;
// Check for #2
if (!Op->isPredecessorOf(N) && !N->isPredecessorOf(Op)) {
SDValue Result = isLoad
? DAG.getIndexedLoad(SDValue(N,0), BasePtr, Offset, AM)
: DAG.getIndexedStore(SDValue(N,0), BasePtr, Offset, AM);
? DAG.getIndexedLoad(SDValue(N,0), N->getDebugLoc(),
BasePtr, Offset, AM)
: DAG.getIndexedStore(SDValue(N,0), N->getDebugLoc(),
BasePtr, Offset, AM);
++PostIndexedNodes;
++NodesCombined;
DOUT << "\nReplacing.5 "; DEBUG(N->dump(&DAG));
@ -4694,6 +4706,7 @@ bool DAGCombiner::CombineToPostIndexedLoadStore(SDNode *N) {
}
}
}
return false;
}
@ -4749,13 +4762,13 @@ SDValue DAGCombiner::visitLOAD(SDNode *N) {
if (!Fast && LD->isUnindexed()) {
if (unsigned Align = InferAlignment(Ptr, DAG)) {
if (Align > LD->getAlignment())
return DAG.getExtLoad(LD->getExtensionType(), LD->getValueType(0),
return DAG.getExtLoad(LD->getExtensionType(), N->getDebugLoc(),
LD->getValueType(0),
Chain, Ptr, LD->getSrcValue(),
LD->getSrcValueOffset(), LD->getMemoryVT(),
LD->isVolatile(), Align);
}
}
// If load is not volatile and there are no uses of the loaded value (and
// the updated indexed value in case of indexed loads), change uses of the
@ -4775,10 +4788,12 @@ SDValue DAGCombiner::visitLOAD(SDNode *N) {
DOUT << "\n";
WorkListRemover DeadNodes(*this);
DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), Chain, &DeadNodes);
if (N->use_empty()) {
removeFromWorkList(N);
DAG.DeleteNode(N);
}
return SDValue(N, 0); // Return N so it doesn't get rechecked!
}
} else {
@ -4792,7 +4807,8 @@ SDValue DAGCombiner::visitLOAD(SDNode *N) {
WorkListRemover DeadNodes(*this);
DAG.ReplaceAllUsesOfValueWith(SDValue(N, 0), Undef, &DeadNodes);
DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1),
DAG.getNode(ISD::UNDEF, N->getValueType(1)),
DAG.getNode(ISD::UNDEF, DebugLoc::getUnknownLoc(),
N->getValueType(1)),
&DeadNodes);
DAG.ReplaceAllUsesOfValueWith(SDValue(N, 2), Chain, &DeadNodes);
removeFromWorkList(N);
@ -4826,11 +4842,12 @@ SDValue DAGCombiner::visitLOAD(SDNode *N) {
// Replace the chain to void dependency.
if (LD->getExtensionType() == ISD::NON_EXTLOAD) {
ReplLoad = DAG.getLoad(N->getValueType(0), BetterChain, Ptr,
ReplLoad = DAG.getLoad(N->getValueType(0), LD->getDebugLoc(),
BetterChain, Ptr,
LD->getSrcValue(), LD->getSrcValueOffset(),
LD->isVolatile(), LD->getAlignment());
} else {
ReplLoad = DAG.getExtLoad(LD->getExtensionType(),
ReplLoad = DAG.getExtLoad(LD->getExtensionType(), LD->getDebugLoc(),
LD->getValueType(0),
BetterChain, Ptr, LD->getSrcValue(),
LD->getSrcValueOffset(),
@ -4840,8 +4857,8 @@ SDValue DAGCombiner::visitLOAD(SDNode *N) {
}
// Create token factor to keep old chain connected.
SDValue Token = DAG.getNode(ISD::TokenFactor, MVT::Other,
Chain, ReplLoad.getValue(1));
SDValue Token = DAG.getNode(ISD::TokenFactor, N->getDebugLoc(),
MVT::Other, Chain, ReplLoad.getValue(1));
// Replace uses with load result and token factor. Don't add users
// to work list.
@ -4856,7 +4873,6 @@ SDValue DAGCombiner::visitLOAD(SDNode *N) {
return SDValue();
}
SDValue DAGCombiner::visitSTORE(SDNode *N) {
StoreSDNode *ST = cast<StoreSDNode>(N);
SDValue Chain = ST->getChain();