-//===-- PPCAsmPrinter.cpp - Print machine instrs to PowerPC assembly --===//
+//===-- PPCAsmPrinter.cpp - Print machine instrs to PowerPC assembly --------=//
//
// The LLVM Compiler Infrastructure
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "asmprinter"
-#include "PowerPC.h"
-#include "PPC32TargetMachine.h"
-#include "PowerPCSubtarget.h"
+#include "PPC.h"
+#include "PPCTargetMachine.h"
+#include "PPCSubtarget.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
namespace {
Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
- struct PPCAsmPrinter : public AsmPrinter {
+ class PPCAsmPrinter : public AsmPrinter {
+ std::string CurSection;
+ public:
std::set<std::string> FnStubs, GVStubs, LinkOnceStubs;
-
+
PPCAsmPrinter(std::ostream &O, TargetMachine &TM)
- : AsmPrinter(O, TM), LabelNumber(0) {}
+ : AsmPrinter(O, TM), FunctionNumber(0) {}
/// Unique incrementer for label values for referencing Global values.
///
- unsigned LabelNumber;
+ unsigned FunctionNumber;
virtual const char *getPassName() const {
return "PowerPC Assembly Printer";
}
- PowerPCTargetMachine &getTM() {
- return static_cast<PowerPCTargetMachine&>(TM);
+ PPCTargetMachine &getTM() {
+ return static_cast<PPCTargetMachine&>(TM);
}
+ /// SwitchSection - Switch to the specified section of the executable if we
+ /// are not already in it!
+ ///
+ void SwitchSection(const char *NewSection, const GlobalValue *GV) {
+ std::string NS;
+
+ if (GV && GV->hasSection())
+ NS = ".section " + GV->getSection();
+ else
+ NS = NewSection;
+
+ if (CurSection != NS) {
+ CurSection = NS;
+ if (!CurSection.empty())
+ O << "\t" << CurSection << "\n";
+ }
+ }
+
unsigned enumRegToMachineReg(unsigned enumReg) {
switch (enumReg) {
default: assert(0 && "Unhandled register!"); break;
MVT::ValueType VT) {
O << (unsigned short)MI->getOperand(OpNo).getImmedValue();
}
+ void printS16X4ImmOperand(const MachineInstr *MI, unsigned OpNo,
+ MVT::ValueType VT) {
+ O << (short)MI->getOperand(OpNo).getImmedValue()*4;
+ }
void printBranchOperand(const MachineInstr *MI, unsigned OpNo,
MVT::ValueType VT) {
// Branches can take an immediate operand. This is used by the branch
if (MI->getOperand(OpNo).isImmediate()) {
O << "$+" << MI->getOperand(OpNo).getImmedValue();
} else {
- printOp(MI->getOperand(OpNo),
- TM.getInstrInfo()->isCall(MI->getOpcode()));
+ printOp(MI->getOperand(OpNo));
}
}
+ void printCallOperand(const MachineInstr *MI, unsigned OpNo,
+ MVT::ValueType VT) {
+ printOp(MI->getOperand(OpNo), true);
+ }
+ void printAbsAddrOperand(const MachineInstr *MI, unsigned OpNo,
+ MVT::ValueType VT) {
+ O << (int)MI->getOperand(OpNo).getImmedValue()*4;
+ }
void printPICLabel(const MachineInstr *MI, unsigned OpNo,
MVT::ValueType VT) {
// FIXME: should probably be converted to cout.width and cout.fill
- O << "\"L0000" << LabelNumber << "$pb\"\n";
- O << "\"L0000" << LabelNumber << "$pb\":";
+ O << "\"L0000" << FunctionNumber << "$pb\"\n";
+ O << "\"L0000" << FunctionNumber << "$pb\":";
}
void printSymbolHi(const MachineInstr *MI, unsigned OpNo,
MVT::ValueType VT) {
O << "ha16(";
printOp(MI->getOperand(OpNo));
if (PICEnabled)
- O << "-\"L0000" << LabelNumber << "$pb\")";
+ O << "-\"L0000" << FunctionNumber << "$pb\")";
else
O << ')';
}
O << "lo16(";
printOp(MI->getOperand(OpNo));
if (PICEnabled)
- O << "-\"L0000" << LabelNumber << "$pb\")";
+ O << "-\"L0000" << FunctionNumber << "$pb\")";
else
O << ')';
}
AIXAsmPrinter(std::ostream &O, TargetMachine &TM)
: PPCAsmPrinter(O, TM) {
CommentString = "#";
- GlobalPrefix = "_";
+ 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.
};
} // 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";
- }
-}
-
/// 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.
case MachineOperand::MO_MachineBasicBlock: {
MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
- O << "LBB" << Mang->getValueName(MBBOp->getParent()->getFunction())
- << "_" << MBBOp->getNumber() << "\t; "
+ O << "LBB" << FunctionNumber << "_" << MBBOp->getNumber() << "\t; "
<< MBBOp->getBasicBlock()->getName();
return;
}
case MachineOperand::MO_ConstantPoolIndex:
- O << ".CPI" << CurrentFnName << "_" << MO.getConstantPoolIndex();
+ O << "LCPI" << FunctionNumber << '_' << MO.getConstantPoolIndex();
return;
case MachineOperand::MO_ExternalSymbol:
printConstantPool(MF.getConstantPool());
// Print out labels for the function.
- O << "\t.text\n";
- emitAlignment(4);
- O << "\t.globl\t" << CurrentFnName << "\n";
+ const Function *F = MF.getFunction();
+ SwitchSection(".text", F);
+ emitAlignment(4, F);
+ if (!F->hasInternalLinkage())
+ O << "\t.globl\t" << CurrentFnName << "\n";
O << CurrentFnName << ":\n";
// Print out code for the function.
I != E; ++I) {
// Print a label for the basic block.
if (I != MF.begin()) {
- O << "LBB" << CurrentFnName << "_" << I->getNumber() << ":\t";
+ O << "LBB" << FunctionNumber << '_' << I->getNumber() << ":\t";
if (!I->getBasicBlock()->getName().empty())
O << CommentString << " " << I->getBasicBlock()->getName();
O << "\n";
printMachineInstruction(II);
}
}
- ++LabelNumber;
+ ++FunctionNumber;
// We didn't modify anything.
return false;
if (CP.empty()) return;
for (unsigned i = 0, e = CP.size(); i != e; ++i) {
- O << "\t.const\n";
+ SwitchSection(".const", 0);
// FIXME: force doubles to be naturally aligned. We should handle this
// more correctly in the future.
if (Type::DoubleTy == CP[i]->getType())
emitAlignment(3);
else
emitAlignment(TD.getTypeAlignmentShift(CP[i]->getType()));
- O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t" << CommentString
- << *CP[i] << "\n";
+ O << "LCPI" << FunctionNumber << '_' << i << ":\t\t\t\t\t" << CommentString
+ << *CP[i] << '\n';
emitGlobalConstant(CP[i]);
}
}
bool DarwinAsmPrinter::doInitialization(Module &M) {
if (TM.getSubtarget<PPCSubtarget>().isGigaProcessor())
O << "\t.machine ppc970\n";
+ SwitchSection("", 0);
AsmPrinter::doInitialization(M);
+
+ // Darwin wants symbols to be quoted if they have complex names.
+ Mang->setUseQuotes(true);
return false;
}
bool DarwinAsmPrinter::doFinalization(Module &M) {
const TargetData &TD = TM.getTargetData();
- std::string CurSection;
// Print out module-level global variables here.
- for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I)
+ for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
+ I != E; ++I)
if (I->hasInitializer()) { // External global require no code
O << '\n';
std::string name = Mang->getValueName(I);
if (C->isNullValue() && /* FIXME: Verify correct */
(I->hasInternalLinkage() || I->hasWeakLinkage() ||
I->hasLinkOnceLinkage())) {
- SwitchSection(O, CurSection, ".data");
+ SwitchSection(".data", I);
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
if (I->hasInternalLinkage())
O << ".lcomm " << name << "," << Size << "," << Align;
} else {
switch (I->getLinkage()) {
case GlobalValue::LinkOnceLinkage:
+ SwitchSection("", 0);
O << ".section __TEXT,__textcoal_nt,coalesced,no_toc\n"
<< ".weak_definition " << name << '\n'
<< ".private_extern " << name << '\n'
O << "\t.globl " << name << "\n";
// FALL THROUGH
case GlobalValue::InternalLinkage:
- SwitchSection(O, CurSection, ".data");
+ SwitchSection(".data", I);
break;
- case GlobalValue::GhostLinkage:
- std::cerr << "Error: unmaterialized (GhostLinkage) function in asm!";
+ default:
+ std::cerr << "Unknown linkage type!";
abort();
}
- emitAlignment(Align);
+ emitAlignment(Align, I);
O << name << ":\t\t\t\t; '" << I->getName() << "'\n";
emitGlobalConstant(C);
}
<< "\t.long\t" << *i << '\n';
}
+ // Funny Darwin hack: This flag tells the linker that no global symbols
+ // contain code that falls through to other global symbols (e.g. the obvious
+ // implementation of multiple entry points). If this doesn't occur, the
+ // linker can safely perform dead code stripping. Since LLVM never generates
+ // code that does this, it is always safe to set.
+ O << "\t.subsections_via_symbols\n";
+
AsmPrinter::doFinalization(M);
return false; // success
}
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";
+ 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.
printMachineInstruction(II);
}
}
- ++LabelNumber;
+ ++FunctionNumber;
O << "LT.." << CurrentFnName << ":\n"
<< "\t.long 0\n"
if (CP.empty()) return;
for (unsigned i = 0, e = CP.size(); i != e; ++i) {
- O << "\t.const\n";
+ SwitchSection(".const", 0);
O << "\t.align " << (unsigned)TD.getTypeAlignment(CP[i]->getType())
<< "\n";
- O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t;"
- << *CP[i] << "\n";
+ O << "LCPI" << FunctionNumber << '_' << i << ":\t\t\t\t\t;"
+ << *CP[i] << '\n';
emitGlobalConstant(CP[i]);
}
}
bool AIXAsmPrinter::doInitialization(Module &M) {
+ SwitchSection("", 0);
const TargetData &TD = TM.getTargetData();
- std::string CurSection;
O << "\t.machine \"ppc64\"\n"
<< "\t.toc\n"
continue;
std::string Name = GV->getName();
- std::string Label = "LC.." + utostr(LabelNumber++);
+ std::string Label = "LC.." + utostr(FunctionNumber++);
GVToLabelMap[GV] = Label;
O << Label << ":\n"
<< "\t.tc " << Name << "[TC]," << Name;
O << '\n';
}
- Mang = new Mangler(M, ".");
+ AsmPrinter::doInitialization(M);
return false; // success
}
O << "_section_.text:\n"
<< "\t.csect .data[RW],3\n"
<< "\t.llong _section_.text\n";
-
- delete Mang;
+ AsmPrinter::doFinalization(M);
return false; // success
}