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[DAG] Refactor vector splitting code in SelectionDAG. No functional change intended.

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Reviewed by Tom

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195156 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Juergen Ributzka
2013-11-19 21:20:17 +00:00
parent edeaa6454e
commit 217baac774
7 changed files with 102 additions and 118 deletions
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31
include/llvm/CodeGen/SelectionDAG.h
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@@ -170,6 +170,7 @@ class SelectionDAG {
const TargetMachine &TM;
const TargetSelectionDAGInfo &TSI;
const TargetTransformInfo *TTI;
const TargetLowering *TLI;
MachineFunction *MF;
LLVMContext *Context;
CodeGenOpt::Level OptLevel;
@@ -268,7 +269,8 @@ public:
/// init - Prepare this SelectionDAG to process code in the given
/// MachineFunction.
///
void init(MachineFunction &mf, const TargetTransformInfo *TTI);
void init(MachineFunction &mf, const TargetTransformInfo *TTI,
const TargetLowering *TLI);
/// clear - Clear state and free memory necessary to make this
/// SelectionDAG ready to process a new block.
@@ -277,9 +279,7 @@ public:
MachineFunction &getMachineFunction() const { return *MF; }
const TargetMachine &getTarget() const { return TM; }
const TargetLowering &getTargetLoweringInfo() const {
return *TM.getTargetLowering();
}
const TargetLowering &getTargetLoweringInfo() const { return *TLI; }
const TargetSelectionDAGInfo &getSelectionDAGInfo() const { return TSI; }
const TargetTransformInfo *getTargetTransformInfo() const { return TTI; }
LLVMContext *getContext() const {return Context; }
@@ -1130,6 +1130,29 @@ public:
/// it cannot be inferred.
unsigned InferPtrAlignment(SDValue Ptr) const;
/// GetSplitDestVTs - Compute the VTs needed for the low/hi parts of a type
/// which is split (or expanded) into two not necessarily identical pieces.
std::pair<EVT, EVT> GetSplitDestVTs(const EVT &VT) const;
/// SplitVector - Split the vector with EXTRACT_SUBVECTOR using the provides
/// VTs and return the low/high part.
std::pair<SDValue, SDValue> SplitVector(const SDValue &N, const SDLoc &DL,
const EVT &LoVT, const EVT &HiVT);
/// SplitVector - Split the vector with EXTRACT_SUBVECTOR and return the
/// low/high part.
std::pair<SDValue, SDValue> SplitVector(const SDValue &N, const SDLoc &DL) {
EVT LoVT, HiVT;
llvm::tie(LoVT, HiVT) = GetSplitDestVTs(N.getValueType());
return SplitVector(N, DL, LoVT, HiVT);
}
/// SplitVectorOperand - Split the node's operand with EXTRACT_SUBVECTOR and
/// return the low/high part.
std::pair<SDValue, SDValue> SplitVectorOperand(SDNode *N, unsigned OpNo) {
return SplitVector(N->getOperand(OpNo), SDLoc(N));
}
private:
bool RemoveNodeFromCSEMaps(SDNode *N);
void AddModifiedNodeToCSEMaps(SDNode *N);