Changes from Nick Lewycky with a simplified PPCTargetAsmInfo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32735 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey 2006-12-21 20:26:09 +00:00
parent 787bfe654c
commit bf1118285c
6 changed files with 277 additions and 20 deletions

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@ -26,10 +26,11 @@ namespace llvm {
/// TargetAsmInfo - This class is intended to be used as a base class for asm
/// properties and features specific to the target.
class TargetAsmInfo {
protected:
public:
//===------------------------------------------------------------------===//
// Properties to be set by the target writer, used to configure asm printer.
//
// Should not be accessed by anything but a subclass of TargetAsmInfo. Use
// accessor functions.
/// TextSection - Section directive for standard text.
///

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@ -282,6 +282,35 @@ namespace {
virtual bool doFinalization(Module &M) = 0;
};
/// LinuxAsmPrinter - PowerPC assembly printer, customized for Linux
struct VISIBILITY_HIDDEN LinuxAsmPrinter : public PPCAsmPrinter {
DwarfWriter DW;
LinuxAsmPrinter(std::ostream &O, PPCTargetMachine &TM,
const TargetAsmInfo *T)
: PPCAsmPrinter(O, TM, T), DW(O, this, T) {
}
virtual const char *getPassName() const {
return "Linux PPC Assembly Printer";
}
bool runOnMachineFunction(MachineFunction &F);
bool doInitialization(Module &M);
bool doFinalization(Module &M);
void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
AU.addRequired<MachineDebugInfo>();
PPCAsmPrinter::getAnalysisUsage(AU);
}
/// getSectionForFunction - Return the section that we should emit the
/// specified function body into.
virtual std::string getSectionForFunction(const Function &F) const;
};
/// DarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac OS
/// X
struct VISIBILITY_HIDDEN DarwinAsmPrinter : public PPCAsmPrinter {
@ -491,7 +520,194 @@ void PPCAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
return;
}
/// runOnMachineFunction - This uses the printMachineInstruction()
/// method to print assembly for each instruction.
///
bool LinuxAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
DW.SetDebugInfo(&getAnalysis<MachineDebugInfo>());
SetupMachineFunction(MF);
O << "\n\n";
// Print out constants referenced by the function
EmitConstantPool(MF.getConstantPool());
// Print out labels for the function.
const Function *F = MF.getFunction();
SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
switch (F->getLinkage()) {
default: assert(0 && "Unknown linkage type!");
case Function::InternalLinkage: // Symbols default to internal.
break;
case Function::ExternalLinkage:
O << "\t.global\t" << CurrentFnName << '\n'
<< "\t.type\t" << CurrentFnName << ", @function\n";
break;
case Function::WeakLinkage:
case Function::LinkOnceLinkage:
O << "\t.global\t" << CurrentFnName << '\n';
O << "\t.weak\t" << CurrentFnName << '\n';
break;
}
EmitAlignment(2, F);
O << CurrentFnName << ":\n";
// Emit pre-function debug information.
DW.BeginFunction(&MF);
// 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.
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.
O << "\t";
printMachineInstruction(II);
}
}
O << "\t.size\t" << CurrentFnName << ",.-" << CurrentFnName << "\n";
// Print out jump tables referenced by the function.
EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
// Emit post-function debug information.
DW.EndFunction();
// We didn't modify anything.
return false;
}
bool LinuxAsmPrinter::doInitialization(Module &M) {
AsmPrinter::doInitialization(M);
// GNU as handles section names wrapped in quotes
Mang->setUseQuotes(true);
SwitchToTextSection(TAI->getTextSection());
// Emit initial debug information.
DW.BeginModule(&M);
return false;
}
bool LinuxAsmPrinter::doFinalization(Module &M) {
const TargetData *TD = TM.getTargetData();
// Print out module-level global variables here.
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->getTypeSize(C->getType());
unsigned Align = TD->getPreferredAlignmentLog(I);
if (C->isNullValue() && /* FIXME: Verify correct */
(I->hasInternalLinkage() || I->hasWeakLinkage() ||
I->hasLinkOnceLinkage() ||
(I->hasExternalLinkage() && !I->hasSection()))) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
if (I->hasExternalLinkage()) {
O << "\t.global " << name << '\n';
O << "\t.type " << name << ", @object\n";
//O << "\t.zerofill __DATA, __common, " << name << ", "
// << Size << ", " << Align;
} else if (I->hasInternalLinkage()) {
SwitchToDataSection("\t.data", I);
O << TAI->getLCOMMDirective() << name << "," << Size;
} else {
SwitchToDataSection("\t.data", I);
O << ".comm " << name << "," << Size;
}
O << "\t\t" << TAI->getCommentString() << " '" << I->getName() << "'\n";
} else {
switch (I->getLinkage()) {
case GlobalValue::LinkOnceLinkage:
case GlobalValue::WeakLinkage:
O << "\t.global " << name << '\n'
<< "\t.type " << name << ", @object\n"
<< "\t.weak " << name << '\n';
SwitchToDataSection("\t.data", 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.global " << name << "\n"
<< "\t.type " << name << ", @object\n";
// FALL THROUGH
case GlobalValue::InternalLinkage:
if (I->isConstant()) {
const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
if (TAI->getCStringSection() && CVA && CVA->isCString()) {
SwitchToDataSection(TAI->getCStringSection(), I);
break;
}
}
// FIXME: special handling for ".ctors" & ".dtors" sections
if (I->hasSection() &&
(I->getSection() == ".ctors" ||
I->getSection() == ".dtors")) {
std::string SectionName = ".section " + I->getSection()
+ ",\"aw\",@progbits";
SwitchToDataSection(SectionName.c_str());
} else {
SwitchToDataSection(TAI->getDataSection(), I);
}
break;
default:
cerr << "Unknown linkage type!";
abort();
}
EmitAlignment(Align, I);
O << name << ":\t\t\t\t" << TAI->getCommentString() << " '"
<< I->getName() << "'\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';
}
}
// TODO
// Emit initial debug information.
DW.EndModule();
AsmPrinter::doFinalization(M);
return false; // success
}
std::string LinuxAsmPrinter::getSectionForFunction(const Function &F) const {
switch (F.getLinkage()) {
default: assert(0 && "Unknown linkage type!");
case Function::ExternalLinkage:
case Function::InternalLinkage: return TAI->getTextSection();
case Function::WeakLinkage:
case Function::LinkOnceLinkage:
return ".text";
}
}
std::string DarwinAsmPrinter::getSectionForFunction(const Function &F) const {
switch (F.getLinkage()) {
@ -786,6 +1002,12 @@ bool DarwinAsmPrinter::doFinalization(Module &M) {
///
FunctionPass *llvm::createPPCAsmPrinterPass(std::ostream &o,
PPCTargetMachine &tm) {
const PPCSubtarget *Subtarget = &tm.getSubtarget<PPCSubtarget>();
if (Subtarget->isDarwin()) {
return new DarwinAsmPrinter(o, tm, tm.getTargetAsmInfo());
} else {
return new LinuxAsmPrinter(o, tm, tm.getTargetAsmInfo());
}
}

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@ -209,9 +209,9 @@ def VRSAVE: SPR<256, "VRsave">, DwarfRegNum<107>;
// Allocate volatiles first
// then nonvolatiles in reverse order since stmw/lmw save from rN to r31
def GPRC : RegisterClass<"PPC", [i32], 32,
[R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12,
[R3, R4, R5, R6, R7, R8, R9, R10, R11, R12,
R30, R29, R28, R27, R26, R25, R24, R23, R22, R21, R20, R19, R18, R17,
R16, R15, R14, R13, R31, R0, R1, LR]>
R16, R15, R14, R2, R13, R31, R0, R1, LR]>
{
let MethodProtos = [{
iterator allocation_order_begin(const MachineFunction &MF) const;
@ -224,6 +224,10 @@ def GPRC : RegisterClass<"PPC", [i32], 32,
}
GPRCClass::iterator
GPRCClass::allocation_order_end(const MachineFunction &MF) const {
// In Linux, r2 is reserved for the OS.
if (!MF.getTarget().getSubtarget<PPCSubtarget>().isDarwin())
return end()-6;
// On PPC64, r13 is the thread pointer. Never allocate this register.
// Note that this is overconservative, as it also prevents allocation of
// R31 when the FP is not needed.

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@ -16,24 +16,14 @@
#include "llvm/Function.h"
using namespace llvm;
DarwinTargetAsmInfo::DarwinTargetAsmInfo(const PPCTargetMachine &TM) {
PPCTargetAsmInfo::PPCTargetAsmInfo(const PPCTargetMachine &TM) {
bool isPPC64 = TM.getSubtargetImpl()->isPPC64();
CommentString = ";";
GlobalPrefix = "_";
PrivateGlobalPrefix = "L";
ZeroDirective = "\t.space\t";
SetDirective = "\t.set";
Data64bitsDirective = isPPC64 ? "\t.quad\t" : 0;
AlignmentIsInBytes = false;
ConstantPoolSection = "\t.const\t";
JumpTableDataSection = ".const";
CStringSection = "\t.cstring";
LCOMMDirective = "\t.lcomm\t";
StaticCtorsSection = ".mod_init_func";
StaticDtorsSection = ".mod_term_func";
UsedDirective = "\t.no_dead_strip\t";
WeakRefDirective = "\t.weak_reference\t";
InlineAsmStart = "# InlineAsm Start";
InlineAsmEnd = "# InlineAsm End";
@ -52,3 +42,32 @@ DarwinTargetAsmInfo::DarwinTargetAsmInfo(const PPCTargetMachine &TM) {
DwarfMacInfoSection = ".section __DWARF,__debug_macinfo,regular,debug";
}
DarwinTargetAsmInfo::DarwinTargetAsmInfo(const PPCTargetMachine &TM)
: PPCTargetAsmInfo(TM)
{
CommentString = ";";
GlobalPrefix = "_";
PrivateGlobalPrefix = "L";
ConstantPoolSection = "\t.const\t";
JumpTableDataSection = ".const";
CStringSection = "\t.cstring";
StaticCtorsSection = ".mod_init_func";
StaticDtorsSection = ".mod_term_func";
UsedDirective = "\t.no_dead_strip\t";
WeakRefDirective = "\t.weak_reference\t";
}
LinuxTargetAsmInfo::LinuxTargetAsmInfo(const PPCTargetMachine &TM)
: PPCTargetAsmInfo(TM)
{
CommentString = "#";
GlobalPrefix = "";
PrivateGlobalPrefix = "";
ConstantPoolSection = "\t.section .rodata.cst4\t";
JumpTableDataSection = ".section .rodata.cst4";
CStringSection = "\t.section\t.rodata";
StaticCtorsSection = ".section\t.ctors,\"aw\",@progbits";
StaticDtorsSection = ".section\t.dtors,\"aw\",@progbits";
UsedDirective = "\t# .no_dead_strip\t";
WeakRefDirective = "\t.weak\t";
}

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@ -21,10 +21,18 @@ namespace llvm {
// Forward declaration.
class PPCTargetMachine;
struct DarwinTargetAsmInfo : public TargetAsmInfo {
struct PPCTargetAsmInfo : public TargetAsmInfo {
PPCTargetAsmInfo(const PPCTargetMachine &TM);
};
struct DarwinTargetAsmInfo : public PPCTargetAsmInfo {
DarwinTargetAsmInfo(const PPCTargetMachine &TM);
};
struct LinuxTargetAsmInfo : public PPCTargetAsmInfo {
LinuxTargetAsmInfo(const PPCTargetMachine &TM);
};
} // namespace llvm
#endif

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@ -28,7 +28,10 @@ namespace {
}
const TargetAsmInfo *PPCTargetMachine::createTargetAsmInfo() const {
if (Subtarget.isDarwin())
return new DarwinTargetAsmInfo(*this);
else
return new LinuxTargetAsmInfo(*this);
}
unsigned PPC32TargetMachine::getJITMatchQuality() {
@ -90,7 +93,7 @@ PPCTargetMachine::PPCTargetMachine(const Module &M, const std::string &FS,
if (Subtarget.isDarwin())
setRelocationModel(Reloc::DynamicNoPIC);
else
setRelocationModel(Reloc::PIC_);
setRelocationModel(Reloc::Static);
}
PPC32TargetMachine::PPC32TargetMachine(const Module &M, const std::string &FS)