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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75948 91177308-0d34-0410-b5e6-96231b3b80d8
92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
//==-- SystemZISelLowering.h - SystemZ 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 is distributed under the University of Illinois Open Source
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// 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 SystemZ 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_SystemZ_ISELLOWERING_H
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#define LLVM_TARGET_SystemZ_ISELLOWERING_H
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#include "SystemZ.h"
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#include "SystemZRegisterInfo.h"
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#include "llvm/CodeGen/SelectionDAG.h"
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#include "llvm/Target/TargetLowering.h"
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namespace llvm {
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namespace SystemZISD {
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enum {
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FIRST_NUMBER = ISD::BUILTIN_OP_END,
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/// Return with a flag operand. Operand 0 is the chain operand.
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RET_FLAG,
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/// CALL/TAILCALL - These operations represent an abstract call
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/// instruction, which includes a bunch of information.
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CALL,
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/// CMP, UCMP - Compare instruction
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CMP,
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UCMP,
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/// BRCOND - Conditional branch. Operand 0 is chain operand, operand 1 is
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/// the block to branch if condition is true, operand 2 is condition code
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/// and operand 3 is the flag operand produced by a CMP instruction.
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BRCOND,
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/// SELECT - Operands 0 and 1 are selection variables, operand 2 is
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/// condition code and operand 3 is the flag operand.
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SELECT
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};
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}
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class SystemZSubtarget;
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class SystemZTargetMachine;
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class SystemZTargetLowering : public TargetLowering {
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public:
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explicit SystemZTargetLowering(SystemZTargetMachine &TM);
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/// LowerOperation - Provide custom lowering hooks for some operations.
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virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
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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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SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG);
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SDValue LowerRET(SDValue Op, SelectionDAG &DAG);
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SDValue LowerCALL(SDValue Op, SelectionDAG &DAG);
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SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG);
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SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG);
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SDValue LowerCCCArguments(SDValue Op, SelectionDAG &DAG);
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SDValue LowerCCCCallTo(SDValue Op, SelectionDAG &DAG, unsigned CC);
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SDNode* LowerCallResult(SDValue Chain, SDValue InFlag,
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CallSDNode *TheCall,
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unsigned CallingConv, SelectionDAG &DAG);
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SDValue EmitCmp(SDValue LHS, SDValue RHS,
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ISD::CondCode CC, SDValue &SystemZCC,
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SelectionDAG &DAG);
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MachineBasicBlock* EmitInstrWithCustomInserter(MachineInstr *MI,
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MachineBasicBlock *BB) const;
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private:
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const SystemZSubtarget &Subtarget;
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const SystemZTargetMachine &TM;
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const SystemZRegisterInfo *RegInfo;
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};
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} // namespace llvm
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#endif // LLVM_TARGET_SystemZ_ISELLOWERING_H
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