//===-- AlphaAsmPrinter.cpp - Alpha LLVM assembly writer ------------------===//
-//
+//
// 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.
-//
+// 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
//
//===----------------------------------------------------------------------===//
+#define DEBUG_TYPE "asm-printer"
#include "Alpha.h"
#include "AlphaInstrInfo.h"
+#include "AlphaTargetMachine.h"
#include "llvm/Module.h"
+#include "llvm/Type.h"
#include "llvm/Assembly/Writer.h"
-#include "llvm/CodeGen/MachineConstantPool.h"
-#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/CodeGen/AsmPrinter.h"
-
+#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/TargetMachine.h"
-
+#include "llvm/Support/Compiler.h"
#include "llvm/Support/Mangler.h"
#include "llvm/ADT/Statistic.h"
-
using namespace llvm;
-namespace {
- Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
- struct AlphaAsmPrinter : public AsmPrinter {
+namespace {
+ struct VISIBILITY_HIDDEN AlphaAsmPrinter : public AsmPrinter {
/// Unique incrementer for label values for referencing Global values.
///
- unsigned LabelNumber;
-
- AlphaAsmPrinter(std::ostream &o, TargetMachine &tm)
- : AsmPrinter(o, tm), LabelNumber(0)
- {
- AlignmentIsInBytes = false;
- }
- /// We name each basic block in a Function with a unique number, so
- /// that we can consistently refer to them later. This is cleared
- /// at the beginning of each call to runOnMachineFunction().
- ///
- typedef std::map<const Value *, unsigned> ValueMapTy;
- ValueMapTy NumberForBB;
+ AlphaAsmPrinter(std::ostream &o, TargetMachine &tm, const TargetAsmInfo *T)
+ : AsmPrinter(o, tm, T) {
+ }
virtual const char *getPassName() const {
return "Alpha Assembly Printer";
}
bool printInstruction(const MachineInstr *MI);
void printOp(const MachineOperand &MO, bool IsCallOp = false);
- void printConstantPool(MachineConstantPool *MCP);
- void printOperand(const MachineInstr *MI, int opNum, MVT::ValueType VT);
+ void printOperand(const MachineInstr *MI, int opNum);
void printBaseOffsetPair (const MachineInstr *MI, int i, bool brackets=true);
- void printMachineInstruction(const MachineInstr *MI);
- bool runOnMachineFunction(MachineFunction &F);
+ bool runOnMachineFunction(MachineFunction &F);
bool doInitialization(Module &M);
bool doFinalization(Module &M);
+
+ bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant, const char *ExtraCode);
+ bool PrintAsmMemoryOperand(const MachineInstr *MI,
+ unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode);
};
} // end of anonymous namespace
/// using the given target machine description. This should work
/// regardless of whether the function is in SSA form.
///
-FunctionPass *llvm::createAlphaCodePrinterPass (std::ostream &o,
- TargetMachine &tm) {
- return new AlphaAsmPrinter(o, tm);
+FunctionPass *llvm::createAlphaCodePrinterPass(std::ostream &o,
+ TargetMachine &tm) {
+ return new AlphaAsmPrinter(o, tm, tm.getTargetAsmInfo());
}
#include "AlphaGenAsmWriter.inc"
-void AlphaAsmPrinter::printOperand(const MachineInstr *MI, int opNum, MVT::ValueType VT)
+void AlphaAsmPrinter::printOperand(const MachineInstr *MI, int opNum)
{
const MachineOperand &MO = MI->getOperand(opNum);
- if (MO.getType() == MachineOperand::MO_MachineRegister) {
- assert(MRegisterInfo::isPhysicalRegister(MO.getReg())&&"Not physreg??");
- O << TM.getRegisterInfo()->get(MO.getReg()).Name;
+ if (MO.getType() == MachineOperand::MO_Register) {
+ assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
+ "Not physreg??");
+ O << TM.getRegisterInfo()->get(MO.getReg()).AsmName;
} else if (MO.isImmediate()) {
- O << MO.getImmedValue();
+ O << MO.getImm();
+ assert(MO.getImm() < (1 << 30));
} else {
printOp(MO);
}
void AlphaAsmPrinter::printOp(const MachineOperand &MO, bool IsCallOp) {
- const MRegisterInfo &RI = *TM.getRegisterInfo();
- int new_symbol;
-
+ const TargetRegisterInfo &RI = *TM.getRegisterInfo();
+
switch (MO.getType()) {
- case MachineOperand::MO_VirtualRegister:
- if (Value *V = MO.getVRegValueOrNull()) {
- O << "<" << V->getName() << ">";
- return;
- }
- // FALLTHROUGH
- case MachineOperand::MO_MachineRegister:
- case MachineOperand::MO_CCRegister:
- O << RI.get(MO.getReg()).Name;
+ case MachineOperand::MO_Register:
+ O << RI.get(MO.getReg()).AsmName;
return;
- case MachineOperand::MO_SignExtendedImmed:
- case MachineOperand::MO_UnextendedImmed:
- std::cerr << "printOp() does not handle immediate values\n";
+ case MachineOperand::MO_Immediate:
+ cerr << "printOp() does not handle immediate values\n";
abort();
return;
- case MachineOperand::MO_PCRelativeDisp:
- std::cerr << "Shouldn't use addPCDisp() when building Alpha MachineInstrs";
- abort();
- return;
-
- case MachineOperand::MO_MachineBasicBlock: {
- MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
- O << "$LBB" << Mang->getValueName(MBBOp->getParent()->getFunction())
- << "_" << MBBOp->getNumber() << "\t" << CommentString << " "
- << MBBOp->getBasicBlock()->getName();
+ case MachineOperand::MO_MachineBasicBlock:
+ printBasicBlockLabel(MO.getMBB());
return;
- }
case MachineOperand::MO_ConstantPoolIndex:
- O << "$CPI" << CurrentFnName << "_" << MO.getConstantPoolIndex();
+ O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
+ << MO.getIndex();
return;
case MachineOperand::MO_ExternalSymbol:
O << MO.getSymbolName();
return;
- case MachineOperand::MO_GlobalAddress:
- O << Mang->getValueName(MO.getGlobal());
+ case MachineOperand::MO_GlobalAddress: {
+ GlobalValue *GV = MO.getGlobal();
+ O << Mang->getValueName(GV);
+ if (GV->isDeclaration() && GV->hasExternalWeakLinkage())
+ ExtWeakSymbols.insert(GV);
return;
-
+ }
+
+ case MachineOperand::MO_JumpTableIndex:
+ O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+ << '_' << MO.getIndex();
+ return;
+
default:
O << "<unknown operand type: " << MO.getType() << ">";
return;
}
}
-/// printMachineInstruction -- Print out a single Alpha MI to
-/// the current output stream.
-///
-void AlphaAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
- ++EmittedInsts;
- if (printInstruction(MI))
- return; // Printer was automatically generated
-
- assert(0 && "Unhandled instruction in asm writer!");
- abort();
- return;
-}
-
-
/// runOnMachineFunction - This uses the printMachineInstruction()
/// method to print assembly for each instruction.
///
bool AlphaAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
- setupMachineFunction(MF);
+ SetupMachineFunction(MF);
O << "\n\n";
// Print out constants referenced by the function
- printConstantPool(MF.getConstantPool());
+ EmitConstantPool(MF.getConstantPool());
+
+ // Print out jump tables referenced by the function
+ EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
// Print out labels for the function.
- O << "\t.text\n";
- emitAlignment(4);
- O << "\t.globl\t" << CurrentFnName << "\n";
- O << "\t.ent\t" << CurrentFnName << "\n";
+ const Function *F = MF.getFunction();
+ SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
+
+ EmitAlignment(4, F);
+ switch (F->getLinkage()) {
+ default: assert(0 && "Unknown linkage type!");
+ case Function::InternalLinkage: // Symbols default to internal.
+ break;
+ case Function::ExternalLinkage:
+ O << "\t.globl " << CurrentFnName << "\n";
+ break;
+ case Function::WeakLinkage:
+ case Function::LinkOnceLinkage:
+ O << TAI->getWeakRefDirective() << CurrentFnName << "\n";
+ break;
+ }
+
+ O << "\t.ent " << CurrentFnName << "\n";
O << CurrentFnName << ":\n";
// Print out code for the function.
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
I != E; ++I) {
- // Print a label for the basic block.
- O << "$LBB" << CurrentFnName << "_" << I->getNumber() << ":\t"
- << CommentString << " " << I->getBasicBlock()->getName() << "\n";
+ if (I != MF.begin()) {
+ printBasicBlockLabel(I, true, true);
+ O << '\n';
+ }
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
II != E; ++II) {
// Print the assembly for the instruction.
- O << "\t";
- printMachineInstruction(II);
+ ++EmittedInsts;
+ if (!printInstruction(II)) {
+ assert(0 && "Unhandled instruction in asm writer!");
+ abort();
+ }
}
}
- ++LabelNumber;
- O << "\t.end\t" << CurrentFnName << "\n";
+ O << "\t.end " << CurrentFnName << "\n";
// We didn't modify anything.
return false;
}
-
-/// printConstantPool - Print to the current output stream assembly
-/// representations of the constants in the constant pool MCP. This is
-/// used to print out constants which have been "spilled to memory" by
-/// the code generator.
-///
-void AlphaAsmPrinter::printConstantPool(MachineConstantPool *MCP) {
- const std::vector<Constant*> &CP = MCP->getConstants();
- const TargetData &TD = TM.getTargetData();
-
- if (CP.empty()) return;
-
- for (unsigned i = 0, e = CP.size(); i != e; ++i) {
- O << "\t.section\t.rodata\n";
- emitAlignment(TD.getTypeAlignmentShift(CP[i]->getType()));
- O << "$CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t" << CommentString
- << *CP[i] << "\n";
- emitGlobalConstant(CP[i]);
- }
-}
-
bool AlphaAsmPrinter::doInitialization(Module &M)
{
- AsmPrinter::doInitialization(M);
- O << "\t.arch ev56\n";
- return false;
+ if(TM.getSubtarget<AlphaSubtarget>().hasCT())
+ O << "\t.arch ev6\n"; //This might need to be ev67, so leave this test here
+ else
+ O << "\t.arch ev6\n";
+ O << "\t.set noat\n";
+ return AsmPrinter::doInitialization(M);
}
-
-// SwitchSection - Switch to the specified section of the executable if we are
-// not already in it!
-//
-static void SwitchSection(std::ostream &OS, std::string &CurSection,
- const char *NewSection) {
- if (CurSection != NewSection) {
- CurSection = NewSection;
- if (!CurSection.empty())
- OS << "\t" << NewSection << "\n";
+bool AlphaAsmPrinter::doFinalization(Module &M) {
+ const TargetData *TD = TM.getTargetData();
+
+ for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I) {
+
+ if (!I->hasInitializer()) continue; // External global require no code
+
+ // Check to see if this is a special global used by LLVM, if so, emit it.
+ if (EmitSpecialLLVMGlobal(I))
+ continue;
+
+ std::string name = Mang->getValueName(I);
+ Constant *C = I->getInitializer();
+ unsigned Size = TD->getABITypeSize(C->getType());
+ unsigned Align = TD->getPreferredAlignmentLog(I);
+
+ //1: hidden?
+ if (I->hasHiddenVisibility())
+ O << TAI->getHiddenDirective() << name << "\n";
+
+ //2: kind
+ switch (I->getLinkage()) {
+ case GlobalValue::LinkOnceLinkage:
+ case GlobalValue::WeakLinkage:
+ O << TAI->getWeakRefDirective() << name << '\n';
+ break;
+ case GlobalValue::AppendingLinkage:
+ case GlobalValue::ExternalLinkage:
+ O << "\t.globl " << name << "\n";
+ break;
+ case GlobalValue::InternalLinkage:
+ break;
+ default:
+ assert(0 && "Unknown linkage type!");
+ cerr << "Unknown linkage type!\n";
+ abort();
+ }
+
+ //3: Section (if changed)
+ if (I->hasSection() &&
+ (I->getSection() == ".ctors" ||
+ I->getSection() == ".dtors")) {
+ std::string SectionName = ".section\t" + I->getSection()
+ + ",\"aw\",@progbits";
+ SwitchToDataSection(SectionName.c_str());
+ } else {
+ if (C->isNullValue())
+ SwitchToDataSection("\t.section\t.bss", I);
+ else
+ SwitchToDataSection("\t.section\t.data", I);
+ }
+
+ //4: Type, Size, Align
+ O << "\t.type\t" << name << ", @object\n";
+ O << "\t.size\t" << name << ", " << Size << "\n";
+ EmitAlignment(Align, I);
+
+ O << name << ":\n";
+
+ // If the initializer is a extern weak symbol, remember to emit the weak
+ // reference!
+ if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
+ if (GV->hasExternalWeakLinkage())
+ ExtWeakSymbols.insert(GV);
+
+ EmitGlobalConstant(C);
+ O << '\n';
}
+
+ return AsmPrinter::doFinalization(M);
}
-bool AlphaAsmPrinter::doFinalization(Module &M) {
- const TargetData &TD = TM.getTargetData();
- std::string CurSection;
-
- for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
- if (I->hasInitializer()) { // External global require no code
- O << "\n\n";
- std::string name = Mang->getValueName(I);
- Constant *C = I->getInitializer();
- unsigned Size = TD.getTypeSize(C->getType());
- unsigned Align = TD.getTypeAlignmentShift(C->getType());
-
- if (C->isNullValue() &&
- (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
- I->hasWeakLinkage() /* FIXME: Verify correct */)) {
- SwitchSection(O, CurSection, ".data");
- if (I->hasInternalLinkage())
- O << "\t.local " << name << "\n";
-
- O << "\t.comm " << name << "," << TD.getTypeSize(C->getType())
- << "," << (1 << Align);
- O << "\t\t# ";
- WriteAsOperand(O, I, true, true, &M);
- O << "\n";
- } else {
- switch (I->getLinkage()) {
- case GlobalValue::LinkOnceLinkage:
- case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
- // Nonnull linkonce -> weak
- O << "\t.weak " << name << "\n";
- SwitchSection(O, CurSection, "");
- O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\n";
- break;
- 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::InternalLinkage:
- if (C->isNullValue())
- SwitchSection(O, CurSection, ".bss");
- else
- SwitchSection(O, CurSection, ".data");
- break;
- case GlobalValue::GhostLinkage:
- std::cerr << "GhostLinkage cannot appear in X86AsmPrinter!\n";
- abort();
- }
-
- emitAlignment(Align);
- O << "\t.type " << name << ",@object\n";
- O << "\t.size " << name << "," << Size << "\n";
- O << name << ":\t\t\t\t# ";
- WriteAsOperand(O, I, true, true, &M);
- O << " = ";
- WriteAsOperand(O, C, false, false, &M);
- O << "\n";
- emitGlobalConstant(C);
- }
- }
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
+///
+bool AlphaAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode) {
+ printOperand(MI, OpNo);
+ return false;
+}
- AsmPrinter::doFinalization(M);
+bool AlphaAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+ unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode) {
+ if (ExtraCode && ExtraCode[0])
+ return true; // Unknown modifier.
+ O << "0(";
+ printOperand(MI, OpNo);
+ O << ")";
return false;
}
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