//
// 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.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
+#define DEBUG_TYPE "asm-printer"
#include "Alpha.h"
#include "AlphaInstrInfo.h"
#include "AlphaTargetMachine.h"
#include "llvm/Type.h"
#include "llvm/Assembly/Writer.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"
-#include <iostream>
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;
- PrivateGlobalPrefix = "$";
+ AlphaAsmPrinter(std::ostream &o, TargetMachine &tm, const TargetAsmInfo *T)
+ : AsmPrinter(o, tm, T) {
}
- /// 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;
- std::string CurSection;
-
virtual const char *getPassName() const {
return "Alpha Assembly Printer";
}
void printOp(const MachineOperand &MO, bool IsCallOp = false);
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 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)
{
const MachineOperand &MO = MI->getOperand(opNum);
- if (MO.getType() == MachineOperand::MO_MachineRegister) {
+ if (MO.getType() == MachineOperand::MO_Register) {
assert(MRegisterInfo::isPhysicalRegister(MO.getReg())&&"Not physreg??");
O << TM.getRegisterInfo()->get(MO.getReg()).Name;
} else if (MO.isImmediate()) {
O << MO.getImmedValue();
+ assert(MO.getImmedValue() < (1 << 30));
} else {
printOp(MO);
}
void AlphaAsmPrinter::printOp(const MachineOperand &MO, bool IsCallOp) {
const MRegisterInfo &RI = *TM.getRegisterInfo();
- int new_symbol;
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:
+ case MachineOperand::MO_Register:
O << RI.get(MO.getReg()).Name;
return;
- case MachineOperand::MO_SignExtendedImmed:
- case MachineOperand::MO_UnextendedImmed:
- std::cerr << "printOp() does not handle immediate values\n";
- abort();
- return;
-
- case MachineOperand::MO_PCRelativeDisp:
- std::cerr << "Shouldn't use addPCDisp() when building Alpha MachineInstrs";
+ case MachineOperand::MO_Immediate:
+ cerr << "printOp() does not handle immediate values\n";
abort();
return;
return;
case MachineOperand::MO_ConstantPoolIndex:
- O << PrivateGlobalPrefix << "CPI" << getFunctionNumber() << "_"
+ O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
<< MO.getConstantPoolIndex();
return;
O << MO.getSymbolName();
return;
- case MachineOperand::MO_GlobalAddress:
- //Abuse PCrel to specify pcrel calls
- //calls are the only thing that use this flag
-// if (MO.isPCRelative())
-// O << PrivateGlobalPrefix << Mang->getValueName(MO.getGlobal()) << "..ng";
-// else
- 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.getJumpTableIndex();
return;
default:
}
}
-/// 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.
///
// Print out constants referenced by the function
EmitConstantPool(MF.getConstantPool());
+ // Print out jump tables referenced by the function
+ EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
+
// Print out labels for the function.
const Function *F = MF.getFunction();
- SwitchSection(".text", F);
+ SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
+
EmitAlignment(4, F);
switch (F->getLinkage()) {
default: assert(0 && "Unknown linkage type!");
break;
case Function::WeakLinkage:
case Function::LinkOnceLinkage:
- O << "\t.weak " << CurrentFnName << "\n";
+ O << TAI->getWeakRefDirective() << CurrentFnName << "\n";
break;
}
// Print out code for the function.
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
I != E; ++I) {
- printBasicBlockLabel(I, true);
- O << '\n';
+ if (I != MF.begin()) {
+ printBasicBlockLabel(I, true);
+ O << '\n';
+ }
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
II != E; ++II) {
// Print the assembly for the instruction.
+ ++EmittedInsts;
O << "\t";
- printMachineInstruction(II);
+ if (!printInstruction(II)) {
+ assert(0 && "Unhandled instruction in asm writer!");
+ abort();
+ }
}
}
- ++LabelNumber;
O << "\t.end " << CurrentFnName << "\n";
bool AlphaAsmPrinter::doInitialization(Module &M)
{
- AsmPrinter::doInitialization(M);
- if(TM.getSubtarget<AlphaSubtarget>().hasF2I()
- || TM.getSubtarget<AlphaSubtarget>().hasCT())
- O << "\t.arch ev6\n";
+ 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 ev56\n";
+ O << "\t.arch ev6\n";
O << "\t.set noat\n";
- return false;
+ return AsmPrinter::doInitialization(M);
}
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()) { // 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;
-
- 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());
- unsigned Align = getPreferredAlignmentLog(I);
-
- if (C->isNullValue() &&
- (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
- I->hasWeakLinkage() /* FIXME: Verify correct */)) {
- SwitchSection("\t.section .data", I);
- if (I->hasInternalLinkage())
- O << "\t.local " << name << "\n";
-
- O << "\t.comm " << name << "," << TD->getTypeSize(C->getType())
- << "," << (1 << Align)
- << "\n";
- } else {
- switch (I->getLinkage()) {
- case GlobalValue::LinkOnceLinkage:
- case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
- // Nonnull linkonce -> weak
- O << "\t.weak " << name << "\n";
- O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\n";
- SwitchSection("", I);
- 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:
- SwitchSection(C->isNullValue() ? "\t.section .bss" :
- "\t.section .data", I);
- break;
- case GlobalValue::GhostLinkage:
- std::cerr << "GhostLinkage cannot appear in AlphaAsmPrinter!\n";
- abort();
- }
-
- EmitAlignment(Align);
- O << "\t.type " << name << ",@object\n";
- O << "\t.size " << name << "," << Size << "\n";
- O << name << ":\n";
- EmitGlobalConstant(C);
- }
+ 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);
+}
+
+/// 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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