| //===-- llvm/CodeGen/MachineInstrAnnot.h ------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file was developed by the LLVM research group and is distributed under |
| // the University of Illinois Open Source License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // Annotations used to pass information between code generation phases. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef MACHINE_INSTR_ANNOT_h |
| #define MACHINE_INSTR_ANNOT_h |
| |
| #include "llvm/CodeGen/MachineInstr.h" |
| #include "llvm/Target/TargetRegInfo.h" |
| |
| namespace llvm { |
| |
| class Value; |
| class TmpInstruction; |
| class CallInst; |
| |
| class CallArgInfo { |
| // Flag values for different argument passing methods |
| static const unsigned char IntArgReg = 0x1; |
| static const unsigned char FPArgReg = 0x2; |
| static const unsigned char StackSlot = 0x4; |
| |
| Value* argVal; // this argument |
| int argCopyReg; // register used for second copy of arg. when |
| // multiple copies must be passed in registers |
| unsigned char passingMethod; // flags recording passing methods |
| |
| public: |
| // Constructors |
| CallArgInfo(Value* _argVal) |
| : argVal(_argVal), argCopyReg(TargetRegInfo::getInvalidRegNum()), |
| passingMethod(0x0) {} |
| |
| CallArgInfo(const CallArgInfo& obj) |
| : argVal(obj.argVal), argCopyReg(obj.argCopyReg), |
| passingMethod(obj.passingMethod) {} |
| |
| // Accessor methods |
| Value* getArgVal() { return argVal; } |
| int getArgCopy() { return argCopyReg; } |
| bool usesIntArgReg() { return (bool) (passingMethod & IntArgReg);} |
| bool usesFPArgReg() { return (bool) (passingMethod & FPArgReg); } |
| bool usesStackSlot() { return (bool) (passingMethod & StackSlot);} |
| |
| // Modifier methods |
| void replaceArgVal(Value* newVal) { argVal = newVal; } |
| void setUseIntArgReg() { passingMethod |= IntArgReg; } |
| void setUseFPArgReg() { passingMethod |= FPArgReg; } |
| void setUseStackSlot() { passingMethod |= StackSlot; } |
| void setArgCopy(int copyReg) { argCopyReg = copyReg; } |
| }; |
| |
| |
| class CallArgsDescriptor { |
| |
| std::vector<CallArgInfo> argInfoVec; // Descriptor for each argument |
| CallInst* callInstr; // The call instruction == result value |
| Value* funcPtr; // Pointer for indirect calls |
| TmpInstruction* retAddrReg; // Tmp value for return address reg. |
| bool isVarArgs; // Is this a varargs call? |
| bool noPrototype; // Is this a call with no prototype? |
| |
| public: |
| CallArgsDescriptor(CallInst* _callInstr, TmpInstruction* _retAddrReg, |
| bool _isVarArgs, bool _noPrototype); |
| |
| // Accessor methods to retrieve information about the call |
| // Note that operands are numbered 1..#CallArgs |
| unsigned int getNumArgs() const { return argInfoVec.size(); } |
| CallArgInfo& getArgInfo(unsigned int op) { assert(op < argInfoVec.size()); |
| return argInfoVec[op]; } |
| CallInst* getCallInst() const { return callInstr; } |
| CallInst* getReturnValue() const; |
| Value* getIndirectFuncPtr() const { return funcPtr; } |
| TmpInstruction* getReturnAddrReg() const { return retAddrReg; } |
| bool isVarArgsFunc() const { return isVarArgs; } |
| bool hasNoPrototype() const { return noPrototype; } |
| |
| // Mechanism to get the descriptor for a CALL MachineInstr. |
| // |
| static CallArgsDescriptor *get(const MachineInstr* MI); |
| }; |
| |
| } // End llvm namespace |
| |
| #endif |