#include "llvm/Pass.h"
#include "llvm/Constant.h"
+#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/SelectionDAGNodes.h"
namespace llvm {
- class SelectionDAG;
class SelectionDAGLowering;
class SDOperand;
class SSARegMap;
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 {
SSARegMap *RegMap;
SelectionDAG *CurDAG;
MachineBasicBlock *BB;
+ std::vector<SDNode*> TopOrder;
+ unsigned DAGSize;
- SelectionDAGISel(TargetLowering &tli) : TLI(tli), JT(0,0,0,0) {}
+ SelectionDAGISel(TargetLowering &tli) : TLI(tli), DAGSize(0), JT(0,0,0,0) {}
+
+ TargetLowering &getTargetLowering() { return TLI; }
virtual void getAnalysisUsage(AnalysisUsage &AU) const;
virtual void EmitFunctionEntryCode(Function &Fn, MachineFunction &MF) {}
virtual void InstructionSelectBasicBlock(SelectionDAG &SD) = 0;
+ virtual void SelectRootInit() {
+ DAGSize = CurDAG->AssignTopologicalOrder(TopOrder);
+ }
/// SelectInlineAsmMemoryOperand - Select the specified address as a target
/// addressing mode, according to the specified constraint code. If this does
return true;
}
- /// IsFoldableBy - Returns true if the specific operand node N of U can be
- /// folded during instruction selection?
- virtual bool IsFoldableBy(SDNode *N, SDNode *U) { return true; }
+ /// CanBeFoldedBy - Returns true if the specific operand node N of U can be
+ /// 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 {
void SelectInlineAsmMemoryOperands(std::vector<SDOperand> &Ops,
SelectionDAG &DAG);
+ // Calls to these predicates are generated by tblgen.
+ bool CheckAndMask(SDOperand LHS, ConstantSDNode *RHS, int64_t DesiredMaskS);
+ bool CheckOrMask(SDOperand LHS, ConstantSDNode *RHS, int64_t DesiredMaskS);
+
private:
- SDOperand CopyValueToVirtualRegister(SelectionDAGLowering &SDL,
- Value *V, unsigned Reg);
void SelectBasicBlock(BasicBlock *BB, MachineFunction &MF,
FunctionLoweringInfo &FuncInfo);