mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-22 10:29:35 +00:00
derived classes. Since global data alignment, layout, and mangling is often based on the DataLayout, move it to the TargetMachine. This ensures that global data is going to be layed out and mangled consistently if the subtarget changes on a per function basis. Prior to this all targets(*) have had subtarget dependent code moved out and onto the TargetMachine. *One target hasn't been migrated as part of this change: R600. The R600 port has, as a subtarget feature, the size of pointers and this affects global data layout. I've currently hacked in a FIXME to enable progress, but the port needs to be updated to either pass the 64-bitness to the TargetMachine, or fix the DataLayout to avoid subtarget dependent features. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227113 91177308-0d34-0410-b5e6-96231b3b80d8
307 lines
10 KiB
C++
307 lines
10 KiB
C++
//===-- XCoreAsmPrinter.cpp - XCore LLVM assembly writer ------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains a printer that converts from our internal representation
|
|
// of machine-dependent LLVM code to the XAS-format XCore assembly language.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "XCore.h"
|
|
#include "InstPrinter/XCoreInstPrinter.h"
|
|
#include "XCoreInstrInfo.h"
|
|
#include "XCoreMCInstLower.h"
|
|
#include "XCoreSubtarget.h"
|
|
#include "XCoreTargetMachine.h"
|
|
#include "XCoreTargetStreamer.h"
|
|
#include "llvm/ADT/SmallString.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include "llvm/CodeGen/AsmPrinter.h"
|
|
#include "llvm/CodeGen/MachineConstantPool.h"
|
|
#include "llvm/CodeGen/MachineFunctionPass.h"
|
|
#include "llvm/CodeGen/MachineInstr.h"
|
|
#include "llvm/CodeGen/MachineJumpTableInfo.h"
|
|
#include "llvm/CodeGen/MachineModuleInfo.h"
|
|
#include "llvm/IR/Constants.h"
|
|
#include "llvm/IR/DataLayout.h"
|
|
#include "llvm/IR/DebugInfo.h"
|
|
#include "llvm/IR/DerivedTypes.h"
|
|
#include "llvm/IR/Mangler.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/MC/MCAsmInfo.h"
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/MC/MCInst.h"
|
|
#include "llvm/MC/MCStreamer.h"
|
|
#include "llvm/MC/MCSymbol.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/TargetRegistry.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include "llvm/Target/TargetLoweringObjectFile.h"
|
|
#include <algorithm>
|
|
#include <cctype>
|
|
using namespace llvm;
|
|
|
|
#define DEBUG_TYPE "asm-printer"
|
|
|
|
namespace {
|
|
class XCoreAsmPrinter : public AsmPrinter {
|
|
const XCoreSubtarget &Subtarget;
|
|
XCoreMCInstLower MCInstLowering;
|
|
XCoreTargetStreamer &getTargetStreamer();
|
|
|
|
public:
|
|
explicit XCoreAsmPrinter(TargetMachine &TM,
|
|
std::unique_ptr<MCStreamer> Streamer)
|
|
: AsmPrinter(TM, std::move(Streamer)),
|
|
Subtarget(TM.getSubtarget<XCoreSubtarget>()), MCInstLowering(*this) {}
|
|
|
|
const char *getPassName() const override {
|
|
return "XCore Assembly Printer";
|
|
}
|
|
|
|
void printInlineJT(const MachineInstr *MI, int opNum, raw_ostream &O,
|
|
const std::string &directive = ".jmptable");
|
|
void printInlineJT32(const MachineInstr *MI, int opNum, raw_ostream &O) {
|
|
printInlineJT(MI, opNum, O, ".jmptable32");
|
|
}
|
|
void printOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
|
|
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
|
|
unsigned AsmVariant, const char *ExtraCode,
|
|
raw_ostream &O) override;
|
|
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
|
|
unsigned AsmVariant, const char *ExtraCode,
|
|
raw_ostream &O) override;
|
|
|
|
void emitArrayBound(MCSymbol *Sym, const GlobalVariable *GV);
|
|
void EmitGlobalVariable(const GlobalVariable *GV) override;
|
|
|
|
void EmitFunctionEntryLabel() override;
|
|
void EmitInstruction(const MachineInstr *MI) override;
|
|
void EmitFunctionBodyStart() override;
|
|
void EmitFunctionBodyEnd() override;
|
|
};
|
|
} // end of anonymous namespace
|
|
|
|
XCoreTargetStreamer &XCoreAsmPrinter::getTargetStreamer() {
|
|
return static_cast<XCoreTargetStreamer&>(*OutStreamer.getTargetStreamer());
|
|
}
|
|
|
|
void XCoreAsmPrinter::emitArrayBound(MCSymbol *Sym, const GlobalVariable *GV) {
|
|
assert( ( GV->hasExternalLinkage() || GV->hasWeakLinkage() ||
|
|
GV->hasLinkOnceLinkage() || GV->hasCommonLinkage() ) &&
|
|
"Unexpected linkage");
|
|
if (ArrayType *ATy = dyn_cast<ArrayType>(
|
|
cast<PointerType>(GV->getType())->getElementType())) {
|
|
|
|
MCSymbol *SymGlob = OutContext.GetOrCreateSymbol(
|
|
Twine(Sym->getName() + StringRef(".globound")));
|
|
OutStreamer.EmitSymbolAttribute(SymGlob, MCSA_Global);
|
|
OutStreamer.EmitAssignment(SymGlob,
|
|
MCConstantExpr::Create(ATy->getNumElements(),
|
|
OutContext));
|
|
if (GV->hasWeakLinkage() || GV->hasLinkOnceLinkage() ||
|
|
GV->hasCommonLinkage()) {
|
|
OutStreamer.EmitSymbolAttribute(SymGlob, MCSA_Weak);
|
|
}
|
|
}
|
|
}
|
|
|
|
void XCoreAsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
|
|
// Check to see if this is a special global used by LLVM, if so, emit it.
|
|
if (!GV->hasInitializer() ||
|
|
EmitSpecialLLVMGlobal(GV))
|
|
return;
|
|
|
|
const DataLayout *TD = TM.getDataLayout();
|
|
OutStreamer.SwitchSection(
|
|
getObjFileLowering().SectionForGlobal(GV, *Mang, TM));
|
|
|
|
MCSymbol *GVSym = getSymbol(GV);
|
|
const Constant *C = GV->getInitializer();
|
|
unsigned Align = (unsigned)TD->getPreferredTypeAlignmentShift(C->getType());
|
|
|
|
// Mark the start of the global
|
|
getTargetStreamer().emitCCTopData(GVSym->getName());
|
|
|
|
switch (GV->getLinkage()) {
|
|
case GlobalValue::AppendingLinkage:
|
|
report_fatal_error("AppendingLinkage is not supported by this target!");
|
|
case GlobalValue::LinkOnceAnyLinkage:
|
|
case GlobalValue::LinkOnceODRLinkage:
|
|
case GlobalValue::WeakAnyLinkage:
|
|
case GlobalValue::WeakODRLinkage:
|
|
case GlobalValue::ExternalLinkage:
|
|
case GlobalValue::CommonLinkage:
|
|
emitArrayBound(GVSym, GV);
|
|
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
|
|
|
|
if (GV->hasWeakLinkage() || GV->hasLinkOnceLinkage() ||
|
|
GV->hasCommonLinkage())
|
|
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Weak);
|
|
// FALL THROUGH
|
|
case GlobalValue::InternalLinkage:
|
|
case GlobalValue::PrivateLinkage:
|
|
break;
|
|
default:
|
|
llvm_unreachable("Unknown linkage type!");
|
|
}
|
|
|
|
EmitAlignment(Align > 2 ? Align : 2, GV);
|
|
|
|
if (GV->isThreadLocal()) {
|
|
report_fatal_error("TLS is not supported by this target!");
|
|
}
|
|
unsigned Size = TD->getTypeAllocSize(C->getType());
|
|
if (MAI->hasDotTypeDotSizeDirective()) {
|
|
OutStreamer.EmitSymbolAttribute(GVSym, MCSA_ELF_TypeObject);
|
|
OutStreamer.EmitELFSize(GVSym, MCConstantExpr::Create(Size, OutContext));
|
|
}
|
|
OutStreamer.EmitLabel(GVSym);
|
|
|
|
EmitGlobalConstant(C);
|
|
// The ABI requires that unsigned scalar types smaller than 32 bits
|
|
// are padded to 32 bits.
|
|
if (Size < 4)
|
|
OutStreamer.EmitZeros(4 - Size);
|
|
|
|
// Mark the end of the global
|
|
getTargetStreamer().emitCCBottomData(GVSym->getName());
|
|
}
|
|
|
|
void XCoreAsmPrinter::EmitFunctionBodyStart() {
|
|
MCInstLowering.Initialize(Mang, &MF->getContext());
|
|
}
|
|
|
|
/// EmitFunctionBodyEnd - Targets can override this to emit stuff after
|
|
/// the last basic block in the function.
|
|
void XCoreAsmPrinter::EmitFunctionBodyEnd() {
|
|
// Emit function end directives
|
|
getTargetStreamer().emitCCBottomFunction(CurrentFnSym->getName());
|
|
}
|
|
|
|
void XCoreAsmPrinter::EmitFunctionEntryLabel() {
|
|
// Mark the start of the function
|
|
getTargetStreamer().emitCCTopFunction(CurrentFnSym->getName());
|
|
OutStreamer.EmitLabel(CurrentFnSym);
|
|
}
|
|
|
|
void XCoreAsmPrinter::
|
|
printInlineJT(const MachineInstr *MI, int opNum, raw_ostream &O,
|
|
const std::string &directive) {
|
|
unsigned JTI = MI->getOperand(opNum).getIndex();
|
|
const MachineFunction *MF = MI->getParent()->getParent();
|
|
const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
|
|
const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
|
|
const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
|
|
O << "\t" << directive << " ";
|
|
for (unsigned i = 0, e = JTBBs.size(); i != e; ++i) {
|
|
MachineBasicBlock *MBB = JTBBs[i];
|
|
if (i > 0)
|
|
O << ",";
|
|
O << *MBB->getSymbol();
|
|
}
|
|
}
|
|
|
|
void XCoreAsmPrinter::printOperand(const MachineInstr *MI, int opNum,
|
|
raw_ostream &O) {
|
|
const DataLayout *DL = TM.getDataLayout();
|
|
const MachineOperand &MO = MI->getOperand(opNum);
|
|
switch (MO.getType()) {
|
|
case MachineOperand::MO_Register:
|
|
O << XCoreInstPrinter::getRegisterName(MO.getReg());
|
|
break;
|
|
case MachineOperand::MO_Immediate:
|
|
O << MO.getImm();
|
|
break;
|
|
case MachineOperand::MO_MachineBasicBlock:
|
|
O << *MO.getMBB()->getSymbol();
|
|
break;
|
|
case MachineOperand::MO_GlobalAddress:
|
|
O << *getSymbol(MO.getGlobal());
|
|
break;
|
|
case MachineOperand::MO_ConstantPoolIndex:
|
|
O << DL->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber()
|
|
<< '_' << MO.getIndex();
|
|
break;
|
|
case MachineOperand::MO_BlockAddress:
|
|
O << *GetBlockAddressSymbol(MO.getBlockAddress());
|
|
break;
|
|
default:
|
|
llvm_unreachable("not implemented");
|
|
}
|
|
}
|
|
|
|
/// PrintAsmOperand - Print out an operand for an inline asm expression.
|
|
///
|
|
bool XCoreAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
|
|
unsigned AsmVariant,const char *ExtraCode,
|
|
raw_ostream &O) {
|
|
// Print the operand if there is no operand modifier.
|
|
if (!ExtraCode || !ExtraCode[0]) {
|
|
printOperand(MI, OpNo, O);
|
|
return false;
|
|
}
|
|
|
|
// Otherwise fallback on the default implementation.
|
|
return AsmPrinter::PrintAsmOperand(MI, OpNo, AsmVariant, ExtraCode, O);
|
|
}
|
|
|
|
bool XCoreAsmPrinter::
|
|
PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
|
|
unsigned AsmVariant, const char *ExtraCode,
|
|
raw_ostream &O) {
|
|
if (ExtraCode && ExtraCode[0]) {
|
|
return true; // Unknown modifier.
|
|
}
|
|
printOperand(MI, OpNum, O);
|
|
O << '[';
|
|
printOperand(MI, OpNum + 1, O);
|
|
O << ']';
|
|
return false;
|
|
}
|
|
|
|
void XCoreAsmPrinter::EmitInstruction(const MachineInstr *MI) {
|
|
SmallString<128> Str;
|
|
raw_svector_ostream O(Str);
|
|
|
|
switch (MI->getOpcode()) {
|
|
case XCore::DBG_VALUE:
|
|
llvm_unreachable("Should be handled target independently");
|
|
case XCore::ADD_2rus:
|
|
if (MI->getOperand(2).getImm() == 0) {
|
|
O << "\tmov "
|
|
<< XCoreInstPrinter::getRegisterName(MI->getOperand(0).getReg()) << ", "
|
|
<< XCoreInstPrinter::getRegisterName(MI->getOperand(1).getReg());
|
|
OutStreamer.EmitRawText(O.str());
|
|
return;
|
|
}
|
|
break;
|
|
case XCore::BR_JT:
|
|
case XCore::BR_JT32:
|
|
O << "\tbru "
|
|
<< XCoreInstPrinter::getRegisterName(MI->getOperand(1).getReg()) << '\n';
|
|
if (MI->getOpcode() == XCore::BR_JT)
|
|
printInlineJT(MI, 0, O);
|
|
else
|
|
printInlineJT32(MI, 0, O);
|
|
O << '\n';
|
|
OutStreamer.EmitRawText(O.str());
|
|
return;
|
|
}
|
|
|
|
MCInst TmpInst;
|
|
MCInstLowering.Lower(MI, TmpInst);
|
|
|
|
EmitToStreamer(OutStreamer, TmpInst);
|
|
}
|
|
|
|
// Force static initialization.
|
|
extern "C" void LLVMInitializeXCoreAsmPrinter() {
|
|
RegisterAsmPrinter<XCoreAsmPrinter> X(TheXCoreTarget);
|
|
}
|