forked from OSchip/llvm-project
116 lines
4.4 KiB
C++
116 lines
4.4 KiB
C++
//===-- PPCISelLowering.h - PPC32 DAG Lowering Interface --------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Chris Lattner and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the interfaces that PPC uses to lower LLVM code into a
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// selection DAG.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_POWERPC_PPC32ISELLOWERING_H
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#define LLVM_TARGET_POWERPC_PPC32ISELLOWERING_H
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#include "llvm/Target/TargetLowering.h"
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#include "llvm/CodeGen/SelectionDAG.h"
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#include "PPC.h"
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namespace llvm {
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namespace PPCISD {
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enum NodeType {
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// Start the numbering where the builting ops and target ops leave off.
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FIRST_NUMBER = ISD::BUILTIN_OP_END+PPC::INSTRUCTION_LIST_END,
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/// FSEL - Traditional three-operand fsel node.
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///
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FSEL,
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/// FCFID - The FCFID instruction, taking an f64 operand and producing
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/// and f64 value containing the FP representation of the integer that
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/// was temporarily in the f64 operand.
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FCFID,
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/// FCTI[D,W]Z - The FCTIDZ and FCTIWZ instructions, taking an f32 or f64
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/// operand, producing an f64 value containing the integer representation
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/// of that FP value.
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FCTIDZ, FCTIWZ,
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/// STFIWX - The STFIWX instruction. The first operand is an input token
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/// chain, then an f64 value to store, then an address to store it to,
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/// then a SRCVALUE for the address.
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STFIWX,
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// VMADDFP, VNMSUBFP - The VMADDFP and VNMSUBFP instructions, taking
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// three v4f32 operands and producing a v4f32 result.
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VMADDFP, VNMSUBFP,
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/// Hi/Lo - These represent the high and low 16-bit parts of a global
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/// address respectively. These nodes have two operands, the first of
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/// which must be a TargetGlobalAddress, and the second of which must be a
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/// Constant. Selected naively, these turn into 'lis G+C' and 'li G+C',
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/// though these are usually folded into other nodes.
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Hi, Lo,
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/// GlobalBaseReg - On Darwin, this node represents the result of the mflr
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/// at function entry, used for PIC code.
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GlobalBaseReg,
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/// These nodes represent the 32-bit PPC shifts that operate on 6-bit
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/// shift amounts. These nodes are generated by the multi-precision shift
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/// code.
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SRL, SRA, SHL,
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/// CALL - A function call.
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CALL,
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/// Return with a flag operand, matched by 'blr'
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RET_FLAG,
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};
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}
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class PPCTargetLowering : public TargetLowering {
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int VarArgsFrameIndex; // FrameIndex for start of varargs area.
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int ReturnAddrIndex; // FrameIndex for return slot.
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public:
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PPCTargetLowering(TargetMachine &TM);
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/// getTargetNodeName() - This method returns the name of a target specific
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/// DAG node.
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virtual const char *getTargetNodeName(unsigned Opcode) const;
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/// LowerOperation - Provide custom lowering hooks for some operations.
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///
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virtual SDOperand LowerOperation(SDOperand Op, SelectionDAG &DAG);
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virtual SDOperand PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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/// LowerArguments - This hook must be implemented to indicate how we should
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/// lower the arguments for the specified function, into the specified DAG.
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virtual std::vector<SDOperand>
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LowerArguments(Function &F, SelectionDAG &DAG);
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/// LowerCallTo - This hook lowers an abstract call to a function into an
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/// actual call.
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virtual std::pair<SDOperand, SDOperand>
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LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg,
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unsigned CC,
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bool isTailCall, SDOperand Callee, ArgListTy &Args,
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SelectionDAG &DAG);
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virtual MachineBasicBlock *InsertAtEndOfBasicBlock(MachineInstr *MI,
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MachineBasicBlock *MBB);
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ConstraintType getConstraintType(char ConstraintLetter) const;
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std::vector<unsigned>
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getRegClassForInlineAsmConstraint(const std::string &Constraint,
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MVT::ValueType VT) const;
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bool isOperandValidForConstraint(SDOperand Op, char ConstraintLetter);
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};
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}
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#endif // LLVM_TARGET_POWERPC_PPC32ISELLOWERING_H
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