//===-- MachineInstrAnnot.cpp ---------------------------------------------===//
//
+// 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.
+//
+//===----------------------------------------------------------------------===//
+//
// This file defines Annotations used to pass information between code
// generation phases.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/MachineInstrAnnot.h"
-#include "llvm/Annotation.h"
+#include "llvm/CodeGen/InstrSelection.h"
+#include "llvm/CodeGen/MachineCodeForInstruction.h"
#include "llvm/iOther.h"
+#include "llvm/Type.h"
-AnnotationID CallArgsDescriptor::AID(AnnotationManager::
- getID("CodeGen::CallArgsDescriptor"));
+namespace llvm {
-CallArgsDescriptor::CallArgsDescriptor(const CallInst* _callInstr,
+CallArgsDescriptor::CallArgsDescriptor(CallInst* _callInstr,
TmpInstruction* _retAddrReg,
bool _isVarArgs, bool _noPrototype)
- : Annotation(AID),
- callInstr(_callInstr),
+ : callInstr(_callInstr),
funcPtr(isa<Function>(_callInstr->getCalledValue())
? NULL : _callInstr->getCalledValue()),
retAddrReg(_retAddrReg),
&& "Operand 0 is ignored in the loop below!");
for (unsigned int i=1; i < numArgs; ++i)
argInfoVec.push_back(CallArgInfo(callInstr->getOperand(i)));
+
+ // Enter this object in the MachineCodeForInstr object of the CallInst.
+ // This transfers ownership of this object.
+ MachineCodeForInstruction::get(callInstr).setCallArgsDescriptor(this);
}
-const CallInst*
+CallInst*
CallArgsDescriptor::getReturnValue() const
{
return (callInstr->getType() == Type::VoidTy? NULL : callInstr);
}
+
+
+// Mechanism to get the descriptor for a CALL MachineInstr.
+// We get the LLVM CallInstr from the ret. addr. register argument
+// of the CALL MachineInstr (which is explicit operand #3 for indirect
+// calls or the last implicit operand for direct calls). We then get
+// the CallArgsDescriptor from the MachineCodeForInstruction object for
+// the CallInstr.
+// This is roundabout but avoids adding a new map or annotation just
+// to keep track of CallArgsDescriptors.
+//
+CallArgsDescriptor *CallArgsDescriptor::get(const MachineInstr* MI)
+{
+ const TmpInstruction* retAddrReg =
+ cast<TmpInstruction>(isa<Function>(MI->getOperand(0).getVRegValue())
+ ? MI->getImplicitRef(MI->getNumImplicitRefs()-1)
+ : MI->getOperand(2).getVRegValue());
+
+ assert(retAddrReg->getNumOperands() == 1 &&
+ isa<CallInst>(retAddrReg->getOperand(0)) &&
+ "Location of callInstr arg for CALL instr. changed? FIX THIS CODE!");
+
+ const CallInst* callInstr = cast<CallInst>(retAddrReg->getOperand(0));
+
+ CallArgsDescriptor* desc =
+ MachineCodeForInstruction::get(callInstr).getCallArgsDescriptor();
+ assert(desc->getCallInst()==callInstr && "Incorrect call args descriptor?");
+ return desc;
+}
+
+} // End llvm namespace