1 //===-- SparcISelLowering.h - Sparc DAG Lowering Interface ------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interfaces that Sparc uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #ifndef SPARC_ISELLOWERING_H
16 #define SPARC_ISELLOWERING_H
18 #include "llvm/Target/TargetLowering.h"
24 FIRST_NUMBER = ISD::BUILTIN_OP_END,
25 CMPICC, // Compare two GPR operands, set icc.
26 CMPFCC, // Compare two FP operands, set fcc.
27 BRICC, // Branch to dest on icc condition
28 BRFCC, // Branch to dest on fcc condition
29 SELECT_ICC, // Select between two values using the current ICC flags.
30 SELECT_FCC, // Select between two values using the current FCC flags.
32 Hi, Lo, // Hi/Lo operations, typically on a global address.
34 FTOI, // FP to Int within a FP register.
35 ITOF, // Int to FP within a FP register.
37 CALL, // A call instruction.
38 RET_FLAG // Return with a flag operand.
42 class SparcTargetLowering : public TargetLowering {
43 int VarArgsFrameOffset; // Frame offset to start of varargs area.
45 SparcTargetLowering(TargetMachine &TM);
46 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
47 SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG);
49 int getVarArgsFrameOffset() const { return VarArgsFrameOffset; }
51 /// computeMaskedBitsForTargetNode - Determine which of the bits specified
52 /// in Mask are known to be either zero or one and return them in the
53 /// KnownZero/KnownOne bitsets.
54 virtual void computeMaskedBitsForTargetNode(const SDValue Op,
58 const SelectionDAG &DAG,
59 unsigned Depth = 0) const;
61 virtual MachineBasicBlock *EmitInstrWithCustomInserter(MachineInstr *MI,
62 MachineBasicBlock *MBB) const;
64 virtual const char *getTargetNodeName(unsigned Opcode) const;
66 ConstraintType getConstraintType(const std::string &Constraint) const;
67 std::pair<unsigned, const TargetRegisterClass*>
68 getRegForInlineAsmConstraint(const std::string &Constraint, MVT VT) const;
70 getRegClassForInlineAsmConstraint(const std::string &Constraint,
73 virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;
75 /// getFunctionAlignment - Return the Log2 alignment of this function.
76 virtual unsigned getFunctionAlignment(const Function *F) const;
78 } // end namespace llvm
80 #endif // SPARC_ISELLOWERING_H