mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-17 03:30:28 +00:00
e4fd907e72
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152001 91177308-0d34-0410-b5e6-96231b3b80d8
208 lines
7.2 KiB
C++
208 lines
7.2 KiB
C++
//===-- llvm/CallingConvLower.cpp - Calling Convention lowering -----------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the Hexagon_CCState class, used for lowering and
|
|
// implementing calling conventions. Adapted from the machine independent
|
|
// version of the class (CCState) but this handles calls to varargs functions
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "HexagonCallingConvLower.h"
|
|
#include "llvm/Target/TargetRegisterInfo.h"
|
|
#include "llvm/Target/TargetData.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include "Hexagon.h"
|
|
using namespace llvm;
|
|
|
|
Hexagon_CCState::Hexagon_CCState(CallingConv::ID CC, bool isVarArg,
|
|
const TargetMachine &tm,
|
|
SmallVector<CCValAssign, 16> &locs,
|
|
LLVMContext &c)
|
|
: CallingConv(CC), IsVarArg(isVarArg), TM(tm),
|
|
TRI(*TM.getRegisterInfo()), Locs(locs), Context(c) {
|
|
// No stack is used.
|
|
StackOffset = 0;
|
|
|
|
UsedRegs.resize((TRI.getNumRegs()+31)/32);
|
|
}
|
|
|
|
// HandleByVal - Allocate a stack slot large enough to pass an argument by
|
|
// value. The size and alignment information of the argument is encoded in its
|
|
// parameter attribute.
|
|
void Hexagon_CCState::HandleByVal(unsigned ValNo, EVT ValVT,
|
|
EVT LocVT, CCValAssign::LocInfo LocInfo,
|
|
int MinSize, int MinAlign,
|
|
ISD::ArgFlagsTy ArgFlags) {
|
|
unsigned Align = ArgFlags.getByValAlign();
|
|
unsigned Size = ArgFlags.getByValSize();
|
|
if (MinSize > (int)Size)
|
|
Size = MinSize;
|
|
if (MinAlign > (int)Align)
|
|
Align = MinAlign;
|
|
unsigned Offset = AllocateStack(Size, Align);
|
|
|
|
addLoc(CCValAssign::getMem(ValNo, ValVT.getSimpleVT(), Offset,
|
|
LocVT.getSimpleVT(), LocInfo));
|
|
}
|
|
|
|
/// MarkAllocated - Mark a register and all of its aliases as allocated.
|
|
void Hexagon_CCState::MarkAllocated(unsigned Reg) {
|
|
UsedRegs[Reg/32] |= 1 << (Reg&31);
|
|
|
|
if (const uint16_t *RegAliases = TRI.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
|
|
Hexagon_CCState::AnalyzeFormalArguments(const SmallVectorImpl<ISD::InputArg>
|
|
&Ins,
|
|
Hexagon_CCAssignFn Fn,
|
|
unsigned SretValueInRegs) {
|
|
unsigned NumArgs = Ins.size();
|
|
unsigned i = 0;
|
|
|
|
// If the function returns a small struct in registers, skip
|
|
// over the first (dummy) argument.
|
|
if (SretValueInRegs != 0) {
|
|
++i;
|
|
}
|
|
|
|
|
|
for (; i != NumArgs; ++i) {
|
|
EVT ArgVT = Ins[i].VT;
|
|
ISD::ArgFlagsTy ArgFlags = Ins[i].Flags;
|
|
if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this, 0, 0, false)) {
|
|
dbgs() << "Formal argument #" << i << " has unhandled type "
|
|
<< ArgVT.getEVTString() << "\n";
|
|
abort();
|
|
}
|
|
}
|
|
}
|
|
|
|
/// AnalyzeReturn - Analyze the returned values of an ISD::RET node,
|
|
/// incorporating info about the result values into this state.
|
|
void
|
|
Hexagon_CCState::AnalyzeReturn(const SmallVectorImpl<ISD::OutputArg> &Outs,
|
|
Hexagon_CCAssignFn Fn,
|
|
unsigned SretValueInRegs) {
|
|
|
|
// For Hexagon, Return small structures in registers.
|
|
if (SretValueInRegs != 0) {
|
|
if (SretValueInRegs <= 32) {
|
|
unsigned Reg = Hexagon::R0;
|
|
addLoc(CCValAssign::getReg(0, MVT::i32, Reg, MVT::i32,
|
|
CCValAssign::Full));
|
|
return;
|
|
}
|
|
if (SretValueInRegs <= 64) {
|
|
unsigned Reg = Hexagon::D0;
|
|
addLoc(CCValAssign::getReg(0, MVT::i64, Reg, MVT::i64,
|
|
CCValAssign::Full));
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
// Determine which register each value should be copied into.
|
|
for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
|
|
EVT VT = Outs[i].VT;
|
|
ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
|
|
if (Fn(i, VT, VT, CCValAssign::Full, ArgFlags, *this, -1, -1, false)){
|
|
dbgs() << "Return operand #" << i << " has unhandled type "
|
|
<< VT.getEVTString() << "\n";
|
|
abort();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/// AnalyzeCallOperands - Analyze an ISD::CALL node, incorporating info
|
|
/// about the passed values into this state.
|
|
void
|
|
Hexagon_CCState::AnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArg>
|
|
&Outs,
|
|
Hexagon_CCAssignFn Fn,
|
|
int NonVarArgsParams,
|
|
unsigned SretValueSize) {
|
|
unsigned NumOps = Outs.size();
|
|
|
|
unsigned i = 0;
|
|
// If the called function returns a small struct in registers, skip
|
|
// the first actual parameter. We do not want to pass a pointer to
|
|
// the stack location.
|
|
if (SretValueSize != 0) {
|
|
++i;
|
|
}
|
|
|
|
for (; i != NumOps; ++i) {
|
|
EVT ArgVT = Outs[i].VT;
|
|
ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
|
|
if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this,
|
|
NonVarArgsParams, i+1, false)) {
|
|
dbgs() << "Call operand #" << i << " has unhandled type "
|
|
<< ArgVT.getEVTString() << "\n";
|
|
abort();
|
|
}
|
|
}
|
|
}
|
|
|
|
/// AnalyzeCallOperands - Same as above except it takes vectors of types
|
|
/// and argument flags.
|
|
void
|
|
Hexagon_CCState::AnalyzeCallOperands(SmallVectorImpl<EVT> &ArgVTs,
|
|
SmallVectorImpl<ISD::ArgFlagsTy> &Flags,
|
|
Hexagon_CCAssignFn Fn) {
|
|
unsigned NumOps = ArgVTs.size();
|
|
for (unsigned i = 0; i != NumOps; ++i) {
|
|
EVT ArgVT = ArgVTs[i];
|
|
ISD::ArgFlagsTy ArgFlags = Flags[i];
|
|
if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this, -1, -1,
|
|
false)) {
|
|
dbgs() << "Call operand #" << i << " has unhandled type "
|
|
<< ArgVT.getEVTString() << "\n";
|
|
abort();
|
|
}
|
|
}
|
|
}
|
|
|
|
/// AnalyzeCallResult - Analyze the return values of an ISD::CALL node,
|
|
/// incorporating info about the passed values into this state.
|
|
void
|
|
Hexagon_CCState::AnalyzeCallResult(const SmallVectorImpl<ISD::InputArg> &Ins,
|
|
Hexagon_CCAssignFn Fn,
|
|
unsigned SretValueInRegs) {
|
|
|
|
for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
|
|
EVT VT = Ins[i].VT;
|
|
ISD::ArgFlagsTy Flags = ISD::ArgFlagsTy();
|
|
if (Fn(i, VT, VT, CCValAssign::Full, Flags, *this, -1, -1, false)) {
|
|
dbgs() << "Call result #" << i << " has unhandled type "
|
|
<< VT.getEVTString() << "\n";
|
|
abort();
|
|
}
|
|
}
|
|
}
|
|
|
|
/// AnalyzeCallResult - Same as above except it's specialized for calls which
|
|
/// produce a single value.
|
|
void Hexagon_CCState::AnalyzeCallResult(EVT VT, Hexagon_CCAssignFn Fn) {
|
|
if (Fn(0, VT, VT, CCValAssign::Full, ISD::ArgFlagsTy(), *this, -1, -1,
|
|
false)) {
|
|
dbgs() << "Call result has unhandled type "
|
|
<< VT.getEVTString() << "\n";
|
|
abort();
|
|
}
|
|
}
|