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Move isConsecutiveLoad to SelectionDAG. It's not target dependent and it's primary used by selectdag passes.

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llvm-svn: 90922
This commit is contained in:
Evan Cheng 2009-12-09 01:36:00 +00:00
parent 9c2474e272
commit 7941695285
6 changed files with 51 additions and 51 deletions
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6
include/llvm/CodeGen/SelectionDAG.h
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@ -890,6 +890,12 @@ public:
/// vector op and fill the end of the resulting vector with UNDEFS.
SDValue UnrollVectorOp(SDNode *N, unsigned ResNE = 0);
/// isConsecutiveLoad - Return true if LD is loading 'Bytes' bytes from a
/// location that is 'Dist' units away from the location that the 'Base' load
/// is loading from.
bool isConsecutiveLoad(LoadSDNode *LD, LoadSDNode *Base,
unsigned Bytes, int Dist) const;
/// InferPtrAlignment - Infer alignment of a load / store address. Return 0 if
/// it cannot be inferred.
unsigned InferPtrAlignment(SDValue Ptr) const;

6
include/llvm/Target/TargetLowering.h
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@ -857,12 +857,6 @@ public:
virtual bool
isGAPlusOffset(SDNode *N, GlobalValue* &GA, int64_t &Offset) const;
/// isConsecutiveLoad - Return true if LD is loading 'Bytes' bytes from a
/// location that is 'Dist' units away from the location that the 'Base' load
/// is loading from.
bool isConsecutiveLoad(LoadSDNode *LD, LoadSDNode *Base, unsigned Bytes,
int Dist, const MachineFrameInfo *MFI) const;
/// PerformDAGCombine - This method will be invoked for all target nodes and
/// for any target-independent nodes that the target has registered with
/// invoke it for.

3
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -3688,7 +3688,6 @@ SDValue DAGCombiner::CombineConsecutiveLoads(SDNode *N, EVT VT) {
if (!LD1 || !LD2 || !ISD::isNON_EXTLoad(LD1) || !LD1->hasOneUse())
return SDValue();
EVT LD1VT = LD1->getValueType(0);
const MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
if (ISD::isNON_EXTLoad(LD2) &&
LD2->hasOneUse() &&
@ -3696,7 +3695,7 @@ SDValue DAGCombiner::CombineConsecutiveLoads(SDNode *N, EVT VT) {
// If one is volatile it might be ok, but play conservative and bail out.
!LD1->isVolatile() &&
!LD2->isVolatile() &&
TLI.isConsecutiveLoad(LD2, LD1, LD1VT.getSizeInBits()/8, 1, MFI)) {
DAG.isConsecutiveLoad(LD2, LD1, LD1VT.getSizeInBits()/8, 1)) {
unsigned Align = LD1->getAlignment();
unsigned NewAlign = TLI.getTargetData()->
getABITypeAlignment(VT.getTypeForEVT(*DAG.getContext()));

43
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -5868,6 +5868,49 @@ SDValue SelectionDAG::UnrollVectorOp(SDNode *N, unsigned ResNE) {
&Scalars[0], Scalars.size());
}
/// isConsecutiveLoad - Return true if LD is loading 'Bytes' bytes from a
/// location that is 'Dist' units away from the location that the 'Base' load
/// is loading from.
bool SelectionDAG::isConsecutiveLoad(LoadSDNode *LD, LoadSDNode *Base,
unsigned Bytes, int Dist) const {
if (LD->getChain() != Base->getChain())
return false;
EVT VT = LD->getValueType(0);
if (VT.getSizeInBits() / 8 != Bytes)
return false;
SDValue Loc = LD->getOperand(1);
SDValue BaseLoc = Base->getOperand(1);
if (Loc.getOpcode() == ISD::FrameIndex) {
if (BaseLoc.getOpcode() != ISD::FrameIndex)
return false;
const MachineFrameInfo *MFI = getMachineFunction().getFrameInfo();
int FI = cast<FrameIndexSDNode>(Loc)->getIndex();
int BFI = cast<FrameIndexSDNode>(BaseLoc)->getIndex();
int FS = MFI->getObjectSize(FI);
int BFS = MFI->getObjectSize(BFI);
if (FS != BFS || FS != (int)Bytes) return false;
return MFI->getObjectOffset(FI) == (MFI->getObjectOffset(BFI) + Dist*Bytes);
}
if (Loc.getOpcode() == ISD::ADD && Loc.getOperand(0) == BaseLoc) {
ConstantSDNode *V = dyn_cast<ConstantSDNode>(Loc.getOperand(1));
if (V && (V->getSExtValue() == Dist*Bytes))
return true;
}
GlobalValue *GV1 = NULL;
GlobalValue *GV2 = NULL;
int64_t Offset1 = 0;
int64_t Offset2 = 0;
bool isGA1 = TLI.isGAPlusOffset(Loc.getNode(), GV1, Offset1);
bool isGA2 = TLI.isGAPlusOffset(BaseLoc.getNode(), GV2, Offset2);
if (isGA1 && isGA2 && GV1 == GV2)
return Offset1 == (Offset2 + Dist*Bytes);
return false;
}
/// InferPtrAlignment - Infer alignment of a load / store address. Return 0 if
/// it cannot be inferred.
unsigned SelectionDAG::InferPtrAlignment(SDValue Ptr) const {

42
lib/CodeGen/SelectionDAG/TargetLowering.cpp
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@ -2184,48 +2184,6 @@ bool TargetLowering::isGAPlusOffset(SDNode *N, GlobalValue* &GA,
}
/// isConsecutiveLoad - Return true if LD is loading 'Bytes' bytes from a
/// location that is 'Dist' units away from the location that the 'Base' load
/// is loading from.
bool TargetLowering::isConsecutiveLoad(LoadSDNode *LD, LoadSDNode *Base,
unsigned Bytes, int Dist,
const MachineFrameInfo *MFI) const {
if (LD->getChain() != Base->getChain())
return false;
EVT VT = LD->getValueType(0);
if (VT.getSizeInBits() / 8 != Bytes)
return false;
SDValue Loc = LD->getOperand(1);
SDValue BaseLoc = Base->getOperand(1);
if (Loc.getOpcode() == ISD::FrameIndex) {
if (BaseLoc.getOpcode() != ISD::FrameIndex)
return false;
int FI = cast<FrameIndexSDNode>(Loc)->getIndex();
int BFI = cast<FrameIndexSDNode>(BaseLoc)->getIndex();
int FS = MFI->getObjectSize(FI);
int BFS = MFI->getObjectSize(BFI);
if (FS != BFS || FS != (int)Bytes) return false;
return MFI->getObjectOffset(FI) == (MFI->getObjectOffset(BFI) + Dist*Bytes);
}
if (Loc.getOpcode() == ISD::ADD && Loc.getOperand(0) == BaseLoc) {
ConstantSDNode *V = dyn_cast<ConstantSDNode>(Loc.getOperand(1));
if (V && (V->getSExtValue() == Dist*Bytes))
return true;
}
GlobalValue *GV1 = NULL;
GlobalValue *GV2 = NULL;
int64_t Offset1 = 0;
int64_t Offset2 = 0;
bool isGA1 = isGAPlusOffset(Loc.getNode(), GV1, Offset1);
bool isGA2 = isGAPlusOffset(BaseLoc.getNode(), GV2, Offset2);
if (isGA1 && isGA2 && GV1 == GV2)
return Offset1 == (Offset2 + Dist*Bytes);
return false;
}
SDValue TargetLowering::
PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const {
// Default implementation: no optimization.

2
lib/Target/X86/X86ISelLowering.cpp
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@ -8366,7 +8366,7 @@ static bool EltsFromConsecutiveLoads(ShuffleVectorSDNode *N, unsigned NumElems,
continue;
LoadSDNode *LD = cast<LoadSDNode>(Elt);
if (!TLI.isConsecutiveLoad(LD, LDBase, EltVT.getSizeInBits()/8, i, MFI))
if (!DAG.isConsecutiveLoad(LD, LDBase, EltVT.getSizeInBits()/8, i))
return false;
LastLoadedElt = i;
}