//===-- MachineCodeForInstruction.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.
-//
+//
//===----------------------------------------------------------------------===//
//
-// Representation of the sequence of machine instructions created for a single
-// VM instruction. Additionally records information about hidden and implicit
-// values used by the machine instructions: about hidden values used by the
-// machine instructions:
-//
-// "Temporary values" are intermediate values used in the machine instruction
-// sequence, but not in the VM instruction. Note that such values should be
-// treated as pure SSA values with no interpretation of their operands (i.e., as
-// a TmpInstruction object which actually represents such a value).
-//
-// (2) "Implicit uses" are values used in the VM instruction but not in the
-// machine instruction sequence
-//
+// Container for the sequence of MachineInstrs created for a single
+// LLVM Instruction. MachineCodeForInstruction also tracks temporary values
+// (TmpInstruction objects) created during SparcV9 code generation, so that
+// they can be deleted when they are no longer needed, and finally, it also
+// holds some extra information for 'call' Instructions (using the
+// CallArgsDescriptor object, which is also implemented in this file).
+//
//===----------------------------------------------------------------------===//
#include "MachineCodeForInstruction.h"
#include "MachineFunctionInfo.h"
#include "MachineInstrAnnot.h"
#include "SparcV9TmpInstr.h"
+#include "SparcV9RegisterInfo.h"
using namespace llvm;
MachineCodeForInstruction &MachineCodeForInstruction::get(const Instruction *I){
MachineFunction &MF = MachineFunction::get(I->getParent()->getParent());
- return MF.getInfo()->MCFIEntries[I];
+ return MF.getInfo<SparcV9FunctionInfo>()->MCFIEntries[I];
}
+
void MachineCodeForInstruction::destroy(const Instruction *I) {
MachineFunction &MF = MachineFunction::get(I->getParent()->getParent());
- MF.getInfo()->MCFIEntries.erase(I);
+ MF.getInfo<SparcV9FunctionInfo>()->MCFIEntries.erase(I);
}
-void
-MachineCodeForInstruction::dropAllReferences()
-{
+void MachineCodeForInstruction::dropAllReferences() {
for (unsigned i=0, N=tempVec.size(); i < N; i++)
cast<Instruction>(tempVec[i])->dropAllReferences();
}
-
MachineCodeForInstruction::~MachineCodeForInstruction() {
// Let go of all uses in temp. instructions
dropAllReferences();
-
+
// Free the Value objects created to hold intermediate values
for (unsigned i=0, N=tempVec.size(); i < N; i++)
delete tempVec[i];
-
+
// do not free the MachineInstr objects allocated. they are managed
// by the ilist in MachineBasicBlock
delete callArgsDesc;
}
-
CallArgsDescriptor::CallArgsDescriptor(CallInst* _callInstr,
TmpInstruction* _retAddrReg,
bool _isVarArgs, bool _noPrototype)
// Enter this object in the MachineCodeForInstr object of the CallInst.
// This transfers ownership of this object.
- MachineCodeForInstruction::get(callInstr).setCallArgsDescriptor(this);
+ MachineCodeForInstruction::get(callInstr).setCallArgsDescriptor(this);
}
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());
+/// CallArgsDescriptor::get - Mechanism to get the descriptor for a CALL
+/// MachineInstr. We get the LLVM CallInst from the return-address register
+/// argument of the CALL MachineInstr (which is explicit operand #2 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 Value *retAddrVal = 0;
+ if ((MI->getOperand (0).getType () == MachineOperand::MO_MachineRegister
+ && MI->getOperand (0).getReg () == SparcV9::g0)
+ || (MI->getOperand (0).getType () == MachineOperand::MO_VirtualRegister
+ && !isa<Function> (MI->getOperand (0).getVRegValue ()))) {
+ retAddrVal = MI->getOperand (2).getVRegValue ();
+ } else {
+ retAddrVal = MI->getImplicitRef (MI->getNumImplicitRefs () - 1);
+ }
+ const TmpInstruction* retAddrReg = cast<TmpInstruction> (retAddrVal);
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();
+ MachineCodeForInstruction::get(callInstr).getCallArgsDescriptor();
assert(desc->getCallInst()==callInstr && "Incorrect call args descriptor?");
return desc;
}
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