1 //===-- MachineInstrAnnot.cpp ---------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines Annotations used to pass information between code
13 //===----------------------------------------------------------------------===//
15 #include "../Target/SparcV9/MachineInstrAnnot.h"
16 #include "../Target/SparcV9/SparcV9TmpInstr.h"
17 #include "llvm/CodeGen/MachineCodeForInstruction.h"
18 #include "llvm/Instructions.h"
19 #include "llvm/Type.h"
22 CallArgsDescriptor::CallArgsDescriptor(CallInst* _callInstr,
23 TmpInstruction* _retAddrReg,
24 bool _isVarArgs, bool _noPrototype)
25 : callInstr(_callInstr),
26 funcPtr(isa<Function>(_callInstr->getCalledValue())
27 ? NULL : _callInstr->getCalledValue()),
28 retAddrReg(_retAddrReg),
29 isVarArgs(_isVarArgs),
30 noPrototype(_noPrototype) {
31 unsigned int numArgs = callInstr->getNumOperands();
32 argInfoVec.reserve(numArgs);
33 assert(callInstr->getOperand(0) == callInstr->getCalledValue()
34 && "Operand 0 is ignored in the loop below!");
35 for (unsigned int i=1; i < numArgs; ++i)
36 argInfoVec.push_back(CallArgInfo(callInstr->getOperand(i)));
38 // Enter this object in the MachineCodeForInstr object of the CallInst.
39 // This transfers ownership of this object.
40 MachineCodeForInstruction::get(callInstr).setCallArgsDescriptor(this);
43 CallInst *CallArgsDescriptor::getReturnValue() const {
44 return (callInstr->getType() == Type::VoidTy? NULL : callInstr);
47 // Mechanism to get the descriptor for a CALL MachineInstr.
48 // We get the LLVM CallInstr from the ret. addr. register argument
49 // of the CALL MachineInstr (which is explicit operand #3 for indirect
50 // calls or the last implicit operand for direct calls). We then get
51 // the CallArgsDescriptor from the MachineCodeForInstruction object for
53 // This is roundabout but avoids adding a new map or annotation just
54 // to keep track of CallArgsDescriptors.
56 CallArgsDescriptor *CallArgsDescriptor::get(const MachineInstr* MI) {
57 const TmpInstruction* retAddrReg =
58 cast<TmpInstruction>(isa<Function>(MI->getOperand(0).getVRegValue())
59 ? MI->getImplicitRef(MI->getNumImplicitRefs()-1)
60 : MI->getOperand(2).getVRegValue());
62 assert(retAddrReg->getNumOperands() == 1 &&
63 isa<CallInst>(retAddrReg->getOperand(0)) &&
64 "Location of callInstr arg for CALL instr. changed? FIX THIS CODE!");
66 const CallInst* callInstr = cast<CallInst>(retAddrReg->getOperand(0));
68 CallArgsDescriptor* desc =
69 MachineCodeForInstruction::get(callInstr).getCallArgsDescriptor();
70 assert(desc->getCallInst()==callInstr && "Incorrect call args descriptor?");