summaryrefslogtreecommitdiffstats
path: root/llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp')
-rw-r--r--llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp710
1 files changed, 710 insertions, 0 deletions
diff --git a/llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp b/llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp
new file mode 100644
index 00000000000..b0503d2a2da
--- /dev/null
+++ b/llvm/lib/Target/PowerPC/PowerPCAsmPrinter.cpp
@@ -0,0 +1,710 @@
+//===-- PowerPCAsmPrinter.cpp - Print machine instrs to PowerPC assembly --===//
+//
+// 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 contains a printer that converts from our internal representation
+// of machine-dependent LLVM code to PowerPC assembly language. This printer is
+// the output mechanism used by `llc'.
+//
+// Documentation at http://developer.apple.com/documentation/DeveloperTools/
+// Reference/Assembler/ASMIntroduction/chapter_1_section_1.html
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "asmprinter"
+#include "PowerPC.h"
+#include "PowerPCTargetMachine.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/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/CodeGen/ValueTypes.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/StringExtras.h"
+#include <set>
+using namespace llvm;
+
+namespace {
+ Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
+
+ struct PPC32AsmPrinter : public AsmPrinter {
+ std::set<std::string> FnStubs, GVStubs, LinkOnceStubs;
+ std::set<std::string> Strings;
+
+ PPC32AsmPrinter(std::ostream &O, TargetMachine &TM)
+ : AsmPrinter(O, TM), LabelNumber(0) {}
+
+ /// Unique incrementer for label values for referencing Global values.
+ ///
+ unsigned LabelNumber;
+
+ virtual const char *getPassName() const {
+ return "PowerPC Assembly Printer";
+ }
+
+ PowerPCTargetMachine &getTM() {
+ return static_cast<PowerPCTargetMachine&>(TM);
+ }
+
+ /// printInstruction - This method is automatically generated by tablegen
+ /// from the instruction set description. This method returns true if the
+ /// machine instruction was sufficiently described to print it, otherwise it
+ /// returns false.
+ bool printInstruction(const MachineInstr *MI);
+
+ void printMachineInstruction(const MachineInstr *MI);
+ void printOp(const MachineOperand &MO, bool LoadAddrOp = false);
+
+ void printOperand(const MachineInstr *MI, unsigned OpNo, MVT::ValueType VT){
+ const MachineOperand &MO = MI->getOperand(OpNo);
+ if (MO.getType() == MachineOperand::MO_MachineRegister) {
+ assert(MRegisterInfo::isPhysicalRegister(MO.getReg())&&"Not physreg??");
+ O << LowercaseString(TM.getRegisterInfo()->get(MO.getReg()).Name);
+ } else if (MO.isImmediate()) {
+ O << MO.getImmedValue();
+ } else {
+ printOp(MO);
+ }
+ }
+
+ void printU5ImmOperand(const MachineInstr *MI, unsigned OpNo,
+ MVT::ValueType VT) {
+ unsigned char value = MI->getOperand(OpNo).getImmedValue();
+ assert(value <= 31 && "Invalid u5imm argument!");
+ O << (unsigned int)value;
+ }
+ void printU6ImmOperand(const MachineInstr *MI, unsigned OpNo,
+ MVT::ValueType VT) {
+ unsigned char value = MI->getOperand(OpNo).getImmedValue();
+ assert(value <= 63 && "Invalid u6imm argument!");
+ O << (unsigned int)value;
+ }
+ void printS16ImmOperand(const MachineInstr *MI, unsigned OpNo,
+ MVT::ValueType VT) {
+ O << (short)MI->getOperand(OpNo).getImmedValue();
+ }
+ void printU16ImmOperand(const MachineInstr *MI, unsigned OpNo,
+ MVT::ValueType VT) {
+ O << (unsigned short)MI->getOperand(OpNo).getImmedValue();
+ }
+ void printBranchOperand(const MachineInstr *MI, unsigned OpNo,
+ MVT::ValueType VT) {
+
+ // Branches can take an immediate operand. This is used by the branch
+ // selection pass to print $+8, an eight byte displacement from the PC.
+ if (MI->getOperand(OpNo).isImmediate()) {
+ O << "$+" << MI->getOperand(OpNo).getImmedValue() << '\n';
+ } else {
+ printOp(MI->getOperand(OpNo));
+ }
+ }
+ void printPICLabel(const MachineInstr *MI, unsigned OpNo,
+ MVT::ValueType VT) {
+ // FIXME: should probably be converted to cout.width and cout.fill
+ O << "\"L0000" << LabelNumber << "$pb\"\n";
+ O << "\"L0000" << LabelNumber << "$pb\":";
+ }
+ void printSymbolHi(const MachineInstr *MI, unsigned OpNo,
+ MVT::ValueType VT) {
+ O << "ha16(";
+ printOp(MI->getOperand(OpNo), true /* LoadAddrOp */);
+ O << "-\"L0000" << LabelNumber << "$pb\")";
+ }
+ void printSymbolLo(const MachineInstr *MI, unsigned OpNo,
+ MVT::ValueType VT) {
+ // FIXME: Because LFS, LFD, and LWZ can be used either with a s16imm or
+ // a lo16 of a global or constant pool operand, we must handle both here.
+ // this isn't a great design, but it works for now.
+ if (MI->getOperand(OpNo).isImmediate()) {
+ O << (short)MI->getOperand(OpNo).getImmedValue();
+ } else {
+ O << "lo16(";
+ printOp(MI->getOperand(OpNo), true /* LoadAddrOp */);
+ O << "-\"L0000" << LabelNumber << "$pb\")";
+ }
+ }
+
+ virtual void printConstantPool(MachineConstantPool *MCP) = 0;
+ virtual bool runOnMachineFunction(MachineFunction &F) = 0;
+ virtual bool doFinalization(Module &M) = 0;
+ };
+
+ //
+ //
+ struct DarwinAsmPrinter : public PPC32AsmPrinter {
+
+ DarwinAsmPrinter(std::ostream &O, TargetMachine &TM)
+ : PPC32AsmPrinter(O, TM) {
+ CommentString = ";";
+ GlobalPrefix = "_";
+ ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
+ Data64bitsDirective = 0; // we can't emit a 64-bit unit
+ AlignmentIsInBytes = false; // Alignment is by power of 2.
+ }
+
+ virtual const char *getPassName() const {
+ return "Darwin PPC Assembly Printer";
+ }
+
+ void printConstantPool(MachineConstantPool *MCP);
+ bool runOnMachineFunction(MachineFunction &F);
+ bool doFinalization(Module &M);
+ };
+
+ //
+ //
+ struct AIXAsmPrinter : public PPC32AsmPrinter {
+ /// Map for labels corresponding to global variables
+ ///
+ std::map<const GlobalVariable*,std::string> GVToLabelMap;
+
+ AIXAsmPrinter(std::ostream &O, TargetMachine &TM)
+ : PPC32AsmPrinter(O, TM) {
+ CommentString = "#";
+ GlobalPrefix = "_";
+ ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
+ Data64bitsDirective = 0; // we can't emit a 64-bit unit
+ AlignmentIsInBytes = false; // Alignment is by power of 2.
+ }
+
+ virtual const char *getPassName() const {
+ return "AIX PPC Assembly Printer";
+ }
+
+ void printConstantPool(MachineConstantPool *MCP);
+ bool runOnMachineFunction(MachineFunction &F);
+ bool doInitialization(Module &M);
+ bool doFinalization(Module &M);
+ };
+} // end of anonymous namespace
+
+// 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";
+ }
+}
+
+/// isStringCompatible - Can we treat the specified array as a string?
+/// Only if it is an array of ubytes or non-negative sbytes.
+///
+static bool isStringCompatible(const ConstantArray *CVA) {
+ const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
+ if (ETy == Type::UByteTy) return true;
+ if (ETy != Type::SByteTy) return false;
+
+ for (unsigned i = 0; i < CVA->getNumOperands(); ++i)
+ if (cast<ConstantSInt>(CVA->getOperand(i))->getValue() < 0)
+ return false;
+
+ return true;
+}
+
+/// toOctal - Convert the low order bits of X into an octal digit.
+///
+static inline char toOctal(int X) {
+ return (X&7)+'0';
+}
+
+// Possible states while outputting ASCII strings
+namespace {
+ enum StringSection {
+ None,
+ Alpha,
+ Numeric
+ };
+}
+
+/// SwitchStringSection - manage the changes required to output bytes as
+/// characters in a string vs. numeric decimal values
+///
+static inline void SwitchStringSection(std::ostream &O, StringSection NewSect,
+ StringSection &Current) {
+ if (Current == None) {
+ if (NewSect == Alpha)
+ O << "\t.byte \"";
+ else if (NewSect == Numeric)
+ O << "\t.byte ";
+ } else if (Current == Alpha) {
+ if (NewSect == None)
+ O << "\"";
+ else if (NewSect == Numeric)
+ O << "\"\n"
+ << "\t.byte ";
+ } else if (Current == Numeric) {
+ if (NewSect == Alpha)
+ O << '\n'
+ << "\t.byte \"";
+ else if (NewSect == Numeric)
+ O << ", ";
+ }
+
+ Current = NewSect;
+}
+
+/// getAsCString - Return the specified array as a C compatible
+/// string, only if the predicate isStringCompatible is true.
+///
+static void printAsCString(std::ostream &O, const ConstantArray *CVA) {
+ assert(isStringCompatible(CVA) && "Array is not string compatible!");
+
+ if (CVA->getNumOperands() == 0)
+ return;
+
+ StringSection Current = None;
+ for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i) {
+ unsigned char C = cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
+ if (C == '"') {
+ SwitchStringSection(O, Alpha, Current);
+ O << "\"\"";
+ } else if (isprint(C)) {
+ SwitchStringSection(O, Alpha, Current);
+ O << C;
+ } else {
+ SwitchStringSection(O, Numeric, Current);
+ O << utostr((unsigned)C);
+ }
+ }
+ SwitchStringSection(O, None, Current);
+ O << '\n';
+}
+
+/// createDarwinAsmPrinterPass - Returns a pass that prints the PPC assembly
+/// code for a MachineFunction to the given output stream, in a format that the
+/// Darwin assembler can deal with.
+///
+FunctionPass *llvm::createDarwinAsmPrinter(std::ostream &o, TargetMachine &tm) {
+ return new DarwinAsmPrinter(o, tm);
+}
+
+/// createAIXAsmPrinterPass - Returns a pass that prints the PPC assembly code
+/// for a MachineFunction to the given output stream, in a format that the
+/// AIX 5L assembler can deal with.
+///
+FunctionPass *llvm::createAIXAsmPrinter(std::ostream &o, TargetMachine &tm) {
+ return new AIXAsmPrinter(o, tm);
+}
+
+// Include the auto-generated portion of the assembly writer
+#include "PowerPCGenAsmWriter.inc"
+
+void PPC32AsmPrinter::printOp(const MachineOperand &MO,
+ bool LoadAddrOp /* = false */) {
+ 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:
+ O << LowercaseString(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 PPC MachineInstrs";
+ abort();
+ return;
+
+ case MachineOperand::MO_MachineBasicBlock: {
+ MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
+ O << ".LBB" << Mang->getValueName(MBBOp->getParent()->getFunction())
+ << "_" << MBBOp->getNumber() << "\t; "
+ << MBBOp->getBasicBlock()->getName();
+ return;
+ }
+
+ case MachineOperand::MO_ConstantPoolIndex:
+ O << ".CPI" << CurrentFnName << "_" << MO.getConstantPoolIndex();
+ return;
+
+ case MachineOperand::MO_ExternalSymbol:
+ O << MO.getSymbolName();
+ return;
+
+ case MachineOperand::MO_GlobalAddress: {
+ GlobalValue *GV = MO.getGlobal();
+ std::string Name = Mang->getValueName(GV);
+
+ // Dynamically-resolved functions need a stub for the function. Be
+ // wary however not to output $stub for external functions whose addresses
+ // are taken. Those should be emitted as $non_lazy_ptr below.
+ Function *F = dyn_cast<Function>(GV);
+ if (F && F->isExternal() && !LoadAddrOp &&
+ getTM().CalledFunctions.count(F)) {
+ FnStubs.insert(Name);
+ O << "L" << Name << "$stub";
+ return;
+ }
+
+ // External global variables need a non-lazily-resolved stub
+ if (GV->isExternal() && getTM().AddressTaken.count(GV)) {
+ GVStubs.insert(Name);
+ O << "L" << Name << "$non_lazy_ptr";
+ return;
+ }
+
+ if (F && LoadAddrOp && getTM().AddressTaken.count(GV)) {
+ LinkOnceStubs.insert(Name);
+ O << "L" << Name << "$non_lazy_ptr";
+ return;
+ }
+
+ O << Mang->getValueName(GV);
+ return;
+ }
+
+ default:
+ O << "<unknown operand type: " << MO.getType() << ">";
+ return;
+ }
+}
+
+/// printMachineInstruction -- Print out a single PowerPC MI in Darwin syntax to
+/// the current output stream.
+///
+void PPC32AsmPrinter::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 DarwinAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+ setupMachineFunction(MF);
+ O << "\n\n";
+
+ // Print out constants referenced by the function
+ printConstantPool(MF.getConstantPool());
+
+ // Print out labels for the function.
+ O << "\t.text\n";
+ emitAlignment(2);
+ O << "\t.globl\t" << 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";
+ for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
+ II != E; ++II) {
+ // Print the assembly for the instruction.
+ O << "\t";
+ printMachineInstruction(II);
+ }
+ }
+ ++LabelNumber;
+
+ // 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 DarwinAsmPrinter::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.const\n";
+ emitAlignment(TD.getTypeAlignmentShift(CP[i]->getType()));
+ O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t" << CommentString
+ << *CP[i] << "\n";
+ emitGlobalConstant(CP[i]);
+ }
+}
+
+bool DarwinAsmPrinter::doFinalization(Module &M) {
+ const TargetData &TD = TM.getTargetData();
+ std::string CurSection;
+
+ // Print out module-level global variables here.
+ 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() && /* FIXME: Verify correct */
+ (I->hasInternalLinkage() || I->hasWeakLinkage())) {
+ SwitchSection(O, CurSection, ".data");
+ if (I->hasInternalLinkage())
+ O << ".lcomm " << name << "," << TD.getTypeSize(C->getType())
+ << "," << Align;
+ else
+ O << ".comm " << name << "," << TD.getTypeSize(C->getType());
+ O << "\t\t; ";
+ WriteAsOperand(O, I, true, true, &M);
+ O << "\n";
+ } else {
+ switch (I->getLinkage()) {
+ case GlobalValue::LinkOnceLinkage:
+ O << ".section __TEXT,__textcoal_nt,coalesced,no_toc\n"
+ << ".weak_definition " << name << '\n'
+ << ".private_extern " << name << '\n'
+ << ".section __DATA,__datacoal_nt,coalesced,no_toc\n";
+ LinkOnceStubs.insert(name);
+ break;
+ 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:
+ SwitchSection(O, CurSection, ".data");
+ break;
+ }
+
+ emitAlignment(Align);
+ O << name << ":\t\t\t\t; ";
+ WriteAsOperand(O, I, true, true, &M);
+ O << " = ";
+ WriteAsOperand(O, C, false, false, &M);
+ O << "\n";
+ emitGlobalConstant(C);
+ }
+ }
+
+ // Output stubs for dynamically-linked functions
+ for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
+ i != e; ++i)
+ {
+ O << ".data\n";
+ O << ".section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32\n";
+ emitAlignment(2);
+ O << "L" << *i << "$stub:\n";
+ O << "\t.indirect_symbol " << *i << "\n";
+ O << "\tmflr r0\n";
+ O << "\tbcl 20,31,L0$" << *i << "\n";
+ O << "L0$" << *i << ":\n";
+ O << "\tmflr r11\n";
+ O << "\taddis r11,r11,ha16(L" << *i << "$lazy_ptr-L0$" << *i << ")\n";
+ O << "\tmtlr r0\n";
+ O << "\tlwzu r12,lo16(L" << *i << "$lazy_ptr-L0$" << *i << ")(r11)\n";
+ O << "\tmtctr r12\n";
+ O << "\tbctr\n";
+ O << ".data\n";
+ O << ".lazy_symbol_pointer\n";
+ O << "L" << *i << "$lazy_ptr:\n";
+ O << "\t.indirect_symbol " << *i << "\n";
+ O << "\t.long dyld_stub_binding_helper\n";
+ }
+
+ O << "\n";
+
+ // Output stubs for external global variables
+ if (GVStubs.begin() != GVStubs.end())
+ O << ".data\n.non_lazy_symbol_pointer\n";
+ for (std::set<std::string>::iterator i = GVStubs.begin(), e = GVStubs.end();
+ i != e; ++i) {
+ O << "L" << *i << "$non_lazy_ptr:\n";
+ O << "\t.indirect_symbol " << *i << "\n";
+ O << "\t.long\t0\n";
+ }
+
+ // Output stubs for link-once variables
+ if (LinkOnceStubs.begin() != LinkOnceStubs.end())
+ O << ".data\n.align 2\n";
+ for (std::set<std::string>::iterator i = LinkOnceStubs.begin(),
+ e = LinkOnceStubs.end(); i != e; ++i) {
+ O << "L" << *i << "$non_lazy_ptr:\n"
+ << "\t.long\t" << *i << '\n';
+ }
+
+ AsmPrinter::doFinalization(M);
+ return false; // success
+}
+
+/// runOnMachineFunction - This uses the printMachineInstruction()
+/// method to print assembly for each instruction.
+///
+bool AIXAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+ CurrentFnName = MF.getFunction()->getName();
+
+ // Print out constants referenced by the function
+ printConstantPool(MF.getConstantPool());
+
+ // Print out header for the function.
+ O << "\t.csect .text[PR]\n"
+ << "\t.align 2\n"
+ << "\t.globl " << CurrentFnName << '\n'
+ << "\t.globl ." << CurrentFnName << '\n'
+ << "\t.csect " << CurrentFnName << "[DS],3\n"
+ << CurrentFnName << ":\n"
+ << "\t.llong ." << CurrentFnName << ", TOC[tc0], 0\n"
+ << "\t.csect .text[PR]\n"
+ << '.' << 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# "
+ << I->getBasicBlock()->getName() << "\n";
+ for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
+ II != E; ++II) {
+ // Print the assembly for the instruction.
+ O << "\t";
+ printMachineInstruction(II);
+ }
+ }
+ ++LabelNumber;
+
+ O << "LT.." << CurrentFnName << ":\n"
+ << "\t.long 0\n"
+ << "\t.byte 0,0,32,65,128,0,0,0\n"
+ << "\t.long LT.." << CurrentFnName << "-." << CurrentFnName << '\n'
+ << "\t.short 3\n"
+ << "\t.byte \"" << CurrentFnName << "\"\n"
+ << "\t.align 2\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 AIXAsmPrinter::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.const\n";
+ O << "\t.align " << (unsigned)TD.getTypeAlignment(CP[i]->getType())
+ << "\n";
+ O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t;"
+ << *CP[i] << "\n";
+ emitGlobalConstant(CP[i]);
+ }
+}
+
+bool AIXAsmPrinter::doInitialization(Module &M) {
+ const TargetData &TD = TM.getTargetData();
+ std::string CurSection;
+
+ O << "\t.machine \"ppc64\"\n"
+ << "\t.toc\n"
+ << "\t.csect .text[PR]\n";
+
+ // Print out module-level global variables
+ for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I) {
+ if (!I->hasInitializer())
+ continue;
+
+ std::string Name = I->getName();
+ Constant *C = I->getInitializer();
+ // N.B.: We are defaulting to writable strings
+ if (I->hasExternalLinkage()) {
+ O << "\t.globl " << Name << '\n'
+ << "\t.csect .data[RW],3\n";
+ } else {
+ O << "\t.csect _global.rw_c[RW],3\n";
+ }
+ O << Name << ":\n";
+ emitGlobalConstant(C);
+ }
+
+ // Output labels for globals
+ if (M.gbegin() != M.gend()) O << "\t.toc\n";
+ for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I) {
+ const GlobalVariable *GV = I;
+ // Do not output labels for unused variables
+ if (GV->isExternal() && GV->use_begin() == GV->use_end())
+ continue;
+
+ std::string Name = GV->getName();
+ std::string Label = "LC.." + utostr(LabelNumber++);
+ GVToLabelMap[GV] = Label;
+ O << Label << ":\n"
+ << "\t.tc " << Name << "[TC]," << Name;
+ if (GV->isExternal()) O << "[RW]";
+ O << '\n';
+ }
+
+ Mang = new Mangler(M, ".");
+ return false; // success
+}
+
+bool AIXAsmPrinter::doFinalization(Module &M) {
+ const TargetData &TD = TM.getTargetData();
+ // Print out module-level global variables
+ for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I) {
+ if (I->hasInitializer() || I->hasExternalLinkage())
+ continue;
+
+ std::string Name = I->getName();
+ if (I->hasInternalLinkage()) {
+ O << "\t.lcomm " << Name << ",16,_global.bss_c";
+ } else {
+ O << "\t.comm " << Name << "," << TD.getTypeSize(I->getType())
+ << "," << log2((unsigned)TD.getTypeAlignment(I->getType()));
+ }
+ O << "\t\t# ";
+ WriteAsOperand(O, I, true, true, &M);
+ O << "\n";
+ }
+
+ O << "_section_.text:\n"
+ << "\t.csect .data[RW],3\n"
+ << "\t.llong _section_.text\n";
+
+ delete Mang;
+ return false; // success
+}
OpenPOWER on IntegriCloud