#define DEBUG_TYPE "asm-printer"
#include "MSP430.h"
#include "MSP430InstrInfo.h"
+#include "MSP430InstPrinter.h"
#include "MSP430MCAsmInfo.h"
+#include "MSP430MCInstLower.h"
#include "MSP430TargetMachine.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
+#include "llvm/Assembly/Writer.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/DwarfWriter.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetRegistry.h"
#include "llvm/ADT/Statistic.h"
-#include "llvm/Support/Compiler.h"
+#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Support/ErrorHandling.h"
STATISTIC(EmittedInsts, "Number of machine instrs printed");
+static cl::opt<bool>
+EnableMCInst("enable-msp430-mcinst-printer", cl::Hidden,
+ cl::desc("enable experimental mcinst gunk in the msp430 backend"));
+
namespace {
- class VISIBILITY_HIDDEN MSP430AsmPrinter : public AsmPrinter {
+ class MSP430AsmPrinter : public AsmPrinter {
public:
MSP430AsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
const MCAsmInfo *MAI, bool V)
return "MSP430 Assembly Printer";
}
+ void printMCInst(const MCInst *MI) {
+ MSP430InstPrinter(O, *MAI).printInstruction(MI);
+ }
void printOperand(const MachineInstr *MI, int OpNum,
const char* Modifier = 0);
+ void printPCRelImmOperand(const MachineInstr *MI, int OpNum) {
+ printOperand(MI, OpNum);
+ }
void printSrcMemOperand(const MachineInstr *MI, int OpNum,
const char* Modifier = 0);
void printCCOperand(const MachineInstr *MI, int OpNum);
- void printInstruction(const MachineInstr *MI); // autogenerated.
- static const char *getRegisterName(unsigned RegNo);
-
void printMachineInstruction(const MachineInstr * MI);
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant,
const char *ExtraCode);
+ bool PrintAsmMemoryOperand(const MachineInstr *MI,
+ unsigned OpNo, unsigned AsmVariant,
+ const char *ExtraCode);
+ void printInstructionThroughMCStreamer(const MachineInstr *MI);
+ void PrintGlobalVariable(const GlobalVariable* GVar);
void emitFunctionHeader(const MachineFunction &MF);
bool runOnMachineFunction(MachineFunction &F);
- virtual void PrintGlobalVariable(const GlobalVariable *GV) {
- // FIXME: No support for global variables?
- }
-
void getAnalysisUsage(AnalysisUsage &AU) const {
AsmPrinter::getAnalysisUsage(AU);
AU.setPreservesAll();
};
} // end of anonymous namespace
-#include "MSP430GenAsmWriter.inc"
+void MSP430AsmPrinter::PrintGlobalVariable(const GlobalVariable* GVar) {
+ if (!GVar->hasInitializer())
+ return; // External global require no code
+
+ // Check to see if this is a special global used by LLVM, if so, emit it.
+ if (EmitSpecialLLVMGlobal(GVar))
+ return;
+
+ const TargetData *TD = TM.getTargetData();
+
+ std::string name = Mang->getMangledName(GVar);
+ Constant *C = GVar->getInitializer();
+ unsigned Size = TD->getTypeAllocSize(C->getType());
+ unsigned Align = TD->getPreferredAlignmentLog(GVar);
+
+ printVisibility(name, GVar->getVisibility());
+
+ O << "\t.type\t" << name << ",@object\n";
+
+ OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(GVar, Mang,
+ TM));
+
+ if (C->isNullValue() && !GVar->hasSection() &&
+ !GVar->isThreadLocal() &&
+ (GVar->hasLocalLinkage() || GVar->isWeakForLinker())) {
+
+ if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
+
+ if (GVar->hasLocalLinkage())
+ O << "\t.local\t" << name << '\n';
+
+ O << MAI->getCOMMDirective() << name << ',' << Size;
+ if (MAI->getCOMMDirectiveTakesAlignment())
+ O << ',' << (MAI->getAlignmentIsInBytes() ? (1 << Align) : Align);
+ if (VerboseAsm) {
+ O.PadToColumn(MAI->getCommentColumn());
+ O << MAI->getCommentString() << ' ';
+ WriteAsOperand(O, GVar, /*PrintType=*/false, GVar->getParent());
+ }
+ O << '\n';
+ return;
+ }
+
+ switch (GVar->getLinkage()) {
+ case GlobalValue::CommonLinkage:
+ case GlobalValue::LinkOnceAnyLinkage:
+ case GlobalValue::LinkOnceODRLinkage:
+ case GlobalValue::WeakAnyLinkage:
+ case GlobalValue::WeakODRLinkage:
+ O << "\t.weak\t" << name << '\n';
+ break;
+ case GlobalValue::DLLExportLinkage:
+ case GlobalValue::AppendingLinkage:
+ // FIXME: appending linkage variables should go into a section of
+ // their name or something. For now, just emit them as external.
+ case GlobalValue::ExternalLinkage:
+ // If external or appending, declare as a global symbol
+ O << "\t.globl " << name << '\n';
+ // FALL THROUGH
+ case GlobalValue::PrivateLinkage:
+ case GlobalValue::LinkerPrivateLinkage:
+ case GlobalValue::InternalLinkage:
+ break;
+ default:
+ assert(0 && "Unknown linkage type!");
+ }
+
+ // Use 16-bit alignment by default to simplify bunch of stuff
+ EmitAlignment(Align, GVar);
+ O << name << ":";
+ if (VerboseAsm) {
+ O.PadToColumn(MAI->getCommentColumn());
+ O << MAI->getCommentString() << ' ';
+ WriteAsOperand(O, GVar, /*PrintType=*/false, GVar->getParent());
+ }
+ O << '\n';
+
+ EmitGlobalConstant(C);
+
+ if (MAI->hasDotTypeDotSizeDirective())
+ O << "\t.size\t" << name << ", " << Size << '\n';
+}
void MSP430AsmPrinter::emitFunctionHeader(const MachineFunction &MF) {
const Function *F = MF.getFunction();
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
I != E; ++I) {
// Print a label for the basic block.
- if (!VerboseAsm && (I->pred_empty() || I->isOnlyReachableByFallthrough())) {
- // This is an entry block or a block that's only reachable via a
- // fallthrough edge. In non-VerboseAsm mode, don't print the label.
- } else {
- EmitBasicBlockStart(I);
- O << '\n';
- }
+ EmitBasicBlockStart(I);
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
II != E; ++II)
void MSP430AsmPrinter::printMachineInstruction(const MachineInstr *MI) {
++EmittedInsts;
- processDebugLoc(MI->getDebugLoc());
+ processDebugLoc(MI, true);
+
+ printInstructionThroughMCStreamer(MI);
- // Call the autogenerated instruction printer routines.
- printInstruction(MI);
-
- if (VerboseAsm && !MI->getDebugLoc().isUnknown())
+ if (VerboseAsm)
EmitComments(*MI);
O << '\n';
+
+ processDebugLoc(MI, false);
}
void MSP430AsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
const MachineOperand &MO = MI->getOperand(OpNum);
switch (MO.getType()) {
case MachineOperand::MO_Register:
- O << getRegisterName(MO.getReg());
+ O << MSP430InstPrinter::getRegisterName(MO.getReg());
return;
case MachineOperand::MO_Immediate:
if (!Modifier || strcmp(Modifier, "nohash"))
return;
case MachineOperand::MO_GlobalAddress: {
bool isMemOp = Modifier && !strcmp(Modifier, "mem");
- bool isCallOp = Modifier && !strcmp(Modifier, "call");
std::string Name = Mang->getMangledName(MO.getGlobal());
- assert(MO.getOffset() == 0 && "No offsets allowed!");
+ uint64_t Offset = MO.getOffset();
- if (isCallOp)
- O << '#';
- else if (isMemOp)
- O << '&';
+ O << (isMemOp ? '&' : '#');
+ if (Offset)
+ O << '(' << Offset << '+';
O << Name;
+ if (Offset)
+ O << ')';
return;
}
case MachineOperand::MO_ExternalSymbol: {
- bool isCallOp = Modifier && !strcmp(Modifier, "call");
+ bool isMemOp = Modifier && !strcmp(Modifier, "mem");
std::string Name(MAI->getGlobalPrefix());
Name += MO.getSymbolName();
- if (isCallOp)
- O << '#';
- O << Name;
+
+ O << (isMemOp ? '&' : '#') << Name;
+
return;
}
default:
const MachineOperand &Base = MI->getOperand(OpNum);
const MachineOperand &Disp = MI->getOperand(OpNum+1);
- if (Base.isGlobal())
- printOperand(MI, OpNum, "mem");
- else if (Disp.isImm() && !Base.getReg())
+ // Print displacement first
+ if (!Disp.isImm()) {
+ printOperand(MI, OpNum+1, "mem");
+ } else {
+ if (!Base.getReg())
+ O << '&';
+
+ printOperand(MI, OpNum+1, "nohash");
+ }
+
+
+ // Print register base field
+ if (Base.getReg()) {
+ O << '(';
printOperand(MI, OpNum);
- else if (Base.getReg()) {
- if (Disp.getImm()) {
- printOperand(MI, OpNum + 1, "nohash");
- O << '(';
- printOperand(MI, OpNum);
- O << ')';
- } else {
- O << '@';
- printOperand(MI, OpNum);
- }
- } else
- llvm_unreachable("Unsupported memory operand");
+ O << ')';
+ }
}
void MSP430AsmPrinter::printCCOperand(const MachineInstr *MI, int OpNum) {
default:
llvm_unreachable("Unsupported CC code");
break;
- case MSP430::COND_E:
+ case MSP430CC::COND_E:
O << "eq";
break;
- case MSP430::COND_NE:
+ case MSP430CC::COND_NE:
O << "ne";
break;
- case MSP430::COND_HS:
+ case MSP430CC::COND_HS:
O << "hs";
break;
- case MSP430::COND_LO:
+ case MSP430CC::COND_LO:
O << "lo";
break;
- case MSP430::COND_GE:
+ case MSP430CC::COND_GE:
O << "ge";
break;
- case MSP430::COND_L:
+ case MSP430CC::COND_L:
O << 'l';
break;
}
return false;
}
+bool MSP430AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+ unsigned OpNo, unsigned AsmVariant,
+ const char *ExtraCode) {
+ if (ExtraCode && ExtraCode[0]) {
+ return true; // Unknown modifier.
+ }
+ printSrcMemOperand(MI, OpNo);
+ return false;
+}
+
+//===----------------------------------------------------------------------===//
+void MSP430AsmPrinter::printInstructionThroughMCStreamer(const MachineInstr *MI){
+
+ MSP430MCInstLower MCInstLowering(OutContext, *Mang, *this);
+
+ switch (MI->getOpcode()) {
+ case TargetInstrInfo::DBG_LABEL:
+ case TargetInstrInfo::EH_LABEL:
+ case TargetInstrInfo::GC_LABEL:
+ printLabel(MI);
+ return;
+ case TargetInstrInfo::KILL:
+ printKill(MI);
+ return;
+ case TargetInstrInfo::INLINEASM:
+ printInlineAsm(MI);
+ return;
+ case TargetInstrInfo::IMPLICIT_DEF:
+ printImplicitDef(MI);
+ return;
+ default: break;
+ }
+
+ MCInst TmpInst;
+ MCInstLowering.Lower(MI, TmpInst);
+
+ printMCInst(&TmpInst);
+}
+
+static MCInstPrinter *createMSP430MCInstPrinter(const Target &T,
+ unsigned SyntaxVariant,
+ const MCAsmInfo &MAI,
+ raw_ostream &O) {
+ if (SyntaxVariant == 0)
+ return new MSP430InstPrinter(O, MAI);
+ return 0;
+}
+
// Force static initialization.
extern "C" void LLVMInitializeMSP430AsmPrinter() {
RegisterAsmPrinter<MSP430AsmPrinter> X(TheMSP430Target);
+ TargetRegistry::RegisterMCInstPrinter(TheMSP430Target,
+ createMSP430MCInstPrinter);
}
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