class TargetLowering;
class FunctionLoweringInfo;
class HazardRecognizer;
-
+
/// SelectionDAGISel - This is the common base class used for SelectionDAG-based
/// pattern-matching instruction selectors.
class SelectionDAGISel : public FunctionPass {
}
/// CanBeFoldedBy - Returns true if the specific operand node N of U can be
- /// folded during instruction selection?
- virtual bool CanBeFoldedBy(SDNode *N, SDNode *U) { return true; }
+ /// folded during instruction selection that starts at Root?
+ virtual bool CanBeFoldedBy(SDNode *N, SDNode *U, SDNode *Root) { return true;}
/// CreateTargetHazardRecognizer - Return a newly allocated hazard recognizer
/// to use for this target when scheduling the DAG.
/// SDISel for the code generation of additional basic blocks needed by multi-
/// case switch statements.
struct CaseBlock {
- CaseBlock(ISD::CondCode cc, Value *s, Constant *c, MachineBasicBlock *lhs,
- MachineBasicBlock *rhs, MachineBasicBlock *me) :
- CC(cc), SwitchV(s), CaseC(c), LHSBB(lhs), RHSBB(rhs), ThisBB(me) {}
+ CaseBlock(ISD::CondCode cc, Value *cmplhs, Value *cmprhs,
+ MachineBasicBlock *truebb, MachineBasicBlock *falsebb,
+ MachineBasicBlock *me)
+ : CC(cc), CmpLHS(cmplhs), CmpRHS(cmprhs),
+ TrueBB(truebb), FalseBB(falsebb), ThisBB(me) {}
// CC - the condition code to use for the case block's setcc node
ISD::CondCode CC;
- // SwitchV - the value to be switched on, 'foo' in switch(foo)
- Value *SwitchV;
- // CaseC - the constant the setcc node will compare against SwitchV
- Constant *CaseC;
- // LHSBB - the block to branch to if the setcc is true
- MachineBasicBlock *LHSBB;
- // RHSBB - the block to branch to if the setcc is false
- MachineBasicBlock *RHSBB;
- // ThisBB - the blcok into which to emit the code for the setcc and branches
+ // CmpLHS/CmpRHS - The LHS/RHS of the comparison to emit.
+ Value *CmpLHS, *CmpRHS;
+ // TrueBB/FalseBB - the block to branch to if the setcc is true/false.
+ MachineBasicBlock *TrueBB, *FalseBB;
+ // ThisBB - the block into which to emit the code for the setcc and branches
MachineBasicBlock *ThisBB;
};
struct JumpTable {
bool CheckOrMask(SDOperand LHS, ConstantSDNode *RHS, int64_t DesiredMaskS);
private:
- void SplitCritEdgesForPHIConstants(BasicBlock *BB);
- SDOperand CopyValueToVirtualRegister(SelectionDAGLowering &SDL,
- Value *V, unsigned Reg);
void SelectBasicBlock(BasicBlock *BB, MachineFunction &MF,
FunctionLoweringInfo &FuncInfo);