mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-19 19:29:31 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40986 91177308-0d34-0410-b5e6-96231b3b80d8
113 lines
4.3 KiB
C++
113 lines
4.3 KiB
C++
//===-- llvm/CallingConvLower.cpp - Calling Conventions -------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by Chris Lattner and is distributed under
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the CCState class, used for lowering and implementing
|
|
// calling conventions.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/CodeGen/CallingConvLower.h"
|
|
#include "llvm/CodeGen/SelectionDAGNodes.h"
|
|
#include "llvm/Target/MRegisterInfo.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
using namespace llvm;
|
|
|
|
CCState::CCState(unsigned CC, bool isVarArg, const TargetMachine &tm,
|
|
SmallVector<CCValAssign, 16> &locs)
|
|
: CallingConv(CC), IsVarArg(isVarArg), TM(tm),
|
|
MRI(*TM.getRegisterInfo()), Locs(locs) {
|
|
// No stack is used.
|
|
StackOffset = 0;
|
|
|
|
UsedRegs.resize(MRI.getNumRegs());
|
|
}
|
|
|
|
void CCState::HandleStruct(unsigned ValNo, MVT::ValueType ValVT,
|
|
MVT::ValueType LocVT, CCValAssign::LocInfo LocInfo,
|
|
unsigned ArgFlags) {
|
|
unsigned Align = 1 << ((ArgFlags & ISD::ParamFlags::ByValAlign) >>
|
|
ISD::ParamFlags::ByValAlignOffs);
|
|
unsigned Size = (ArgFlags & ISD::ParamFlags::ByValSize) >>
|
|
ISD::ParamFlags::ByValSizeOffs;
|
|
unsigned Offset = AllocateStack(Size, Align);
|
|
|
|
addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
|
|
}
|
|
|
|
/// MarkAllocated - Mark a register and all of its aliases as allocated.
|
|
void CCState::MarkAllocated(unsigned Reg) {
|
|
UsedRegs[Reg/32] |= 1 << (Reg&31);
|
|
|
|
if (const unsigned *RegAliases = MRI.getAliasSet(Reg))
|
|
for (; (Reg = *RegAliases); ++RegAliases)
|
|
UsedRegs[Reg/32] |= 1 << (Reg&31);
|
|
}
|
|
|
|
/// AnalyzeFormalArguments - Analyze an ISD::FORMAL_ARGUMENTS node,
|
|
/// incorporating info about the formals into this state.
|
|
void CCState::AnalyzeFormalArguments(SDNode *TheArgs, CCAssignFn Fn) {
|
|
unsigned NumArgs = TheArgs->getNumValues()-1;
|
|
|
|
for (unsigned i = 0; i != NumArgs; ++i) {
|
|
MVT::ValueType ArgVT = TheArgs->getValueType(i);
|
|
SDOperand FlagOp = TheArgs->getOperand(3+i);
|
|
unsigned ArgFlags = cast<ConstantSDNode>(FlagOp)->getValue();
|
|
if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
|
|
cerr << "Formal argument #" << i << " has unhandled type "
|
|
<< MVT::getValueTypeString(ArgVT) << "\n";
|
|
abort();
|
|
}
|
|
}
|
|
}
|
|
|
|
/// AnalyzeReturn - Analyze the returned values of an ISD::RET node,
|
|
/// incorporating info about the result values into this state.
|
|
void CCState::AnalyzeReturn(SDNode *TheRet, CCAssignFn Fn) {
|
|
// Determine which register each value should be copied into.
|
|
for (unsigned i = 0, e = TheRet->getNumOperands() / 2; i != e; ++i) {
|
|
MVT::ValueType VT = TheRet->getOperand(i*2+1).getValueType();
|
|
if (Fn(i, VT, VT, CCValAssign::Full,
|
|
cast<ConstantSDNode>(TheRet->getOperand(i*2+2))->getValue(), *this)){
|
|
cerr << "Return operand #" << i << " has unhandled type "
|
|
<< MVT::getValueTypeString(VT) << "\n";
|
|
abort();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/// AnalyzeCallOperands - Analyze an ISD::CALL node, incorporating info
|
|
/// about the passed values into this state.
|
|
void CCState::AnalyzeCallOperands(SDNode *TheCall, CCAssignFn Fn) {
|
|
unsigned NumOps = (TheCall->getNumOperands() - 5) / 2;
|
|
for (unsigned i = 0; i != NumOps; ++i) {
|
|
MVT::ValueType ArgVT = TheCall->getOperand(5+2*i).getValueType();
|
|
SDOperand FlagOp = TheCall->getOperand(5+2*i+1);
|
|
unsigned ArgFlags =cast<ConstantSDNode>(FlagOp)->getValue();
|
|
if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
|
|
cerr << "Call operand #" << i << " has unhandled type "
|
|
<< MVT::getValueTypeString(ArgVT) << "\n";
|
|
abort();
|
|
}
|
|
}
|
|
}
|
|
|
|
/// AnalyzeCallResult - Analyze the return values of an ISD::CALL node,
|
|
/// incorporating info about the passed values into this state.
|
|
void CCState::AnalyzeCallResult(SDNode *TheCall, CCAssignFn Fn) {
|
|
for (unsigned i = 0, e = TheCall->getNumValues() - 1; i != e; ++i) {
|
|
MVT::ValueType VT = TheCall->getValueType(i);
|
|
if (Fn(i, VT, VT, CCValAssign::Full, 0, *this)) {
|
|
cerr << "Call result #" << i << " has unhandled type "
|
|
<< MVT::getValueTypeString(VT) << "\n";
|
|
abort();
|
|
}
|
|
}
|
|
}
|