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Switch Sparc to new section handling stuff. Refactor printing of module-level GVs significantly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54450 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -54,6 +54,7 @@ namespace {
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return "Sparc Assembly Printer";
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}
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void printModuleLevelGV(const GlobalVariable* GVar);
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void printOperand(const MachineInstr *MI, int opNum);
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void printMemOperand(const MachineInstr *MI, int opNum,
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const char *Modifier = 0);
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@ -61,6 +62,7 @@ namespace {
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bool printInstruction(const MachineInstr *MI); // autogenerated.
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bool runOnMachineFunction(MachineFunction &F);
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std::string getSectionForFunction(const Function &F) const;
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bool doInitialization(Module &M);
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bool doFinalization(Module &M);
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};
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@ -78,6 +80,11 @@ FunctionPass *llvm::createSparcCodePrinterPass(std::ostream &o,
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return new SparcAsmPrinter(o, tm, tm.getTargetAsmInfo());
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}
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// Substitute old hook with new one temporary
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std::string SparcAsmPrinter::getSectionForFunction(const Function &F) const {
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return TAI->SectionForGlobal(&F);
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}
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/// runOnMachineFunction - This uses the printInstruction()
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/// method to print assembly for each instruction.
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///
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@ -177,21 +184,21 @@ void SparcAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
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void SparcAsmPrinter::printMemOperand(const MachineInstr *MI, int opNum,
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const char *Modifier) {
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printOperand(MI, opNum);
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// If this is an ADD operand, emit it like normal operands.
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if (Modifier && !strcmp(Modifier, "arith")) {
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O << ", ";
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printOperand(MI, opNum+1);
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return;
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}
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if (MI->getOperand(opNum+1).isRegister() &&
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MI->getOperand(opNum+1).getReg() == SP::G0)
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return; // don't print "+%g0"
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if (MI->getOperand(opNum+1).isImmediate() &&
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MI->getOperand(opNum+1).getImm() == 0)
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return; // don't print "+0"
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O << "+";
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if (MI->getOperand(opNum+1).isGlobalAddress() ||
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MI->getOperand(opNum+1).isConstantPoolIndex()) {
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@ -216,77 +223,90 @@ bool SparcAsmPrinter::doInitialization(Module &M) {
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}
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bool SparcAsmPrinter::doFinalization(Module &M) {
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const TargetData *TD = TM.getTargetData();
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// Print out module-level global variables here.
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for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
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I != E; ++I)
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if (I->hasInitializer()) { // External global require no code
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// Check to see if this is a special global used by LLVM, if so, emit it.
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if (EmitSpecialLLVMGlobal(I))
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continue;
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O << "\n\n";
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std::string name = Mang->getValueName(I);
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Constant *C = I->getInitializer();
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unsigned Size = TD->getABITypeSize(C->getType());
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unsigned Align = TD->getPreferredAlignment(I);
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printModuleLevelGV(I);
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if (C->isNullValue() && (I->hasCommonLinkage() ||
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I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
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I->hasWeakLinkage() /* FIXME: Verify correct */)) {
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SwitchToDataSection(".data", I);
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if (I->hasInternalLinkage())
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O << "\t.local " << name << "\n";
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O << "\t.comm " << name << "," << TD->getABITypeSize(C->getType())
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<< "," << Align;
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O << "\n";
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} else {
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switch (I->getLinkage()) {
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case GlobalValue::CommonLinkage:
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case GlobalValue::LinkOnceLinkage:
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case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
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// Nonnull linkonce -> weak
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O << "\t.weak " << name << "\n";
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SwitchToDataSection("", I);
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O << "\t.section\t\".llvm.linkonce.d." << name
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<< "\",\"aw\",@progbits\n";
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break;
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case GlobalValue::AppendingLinkage:
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// FIXME: appending linkage variables should go into a section of
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// their name or something. For now, just emit them as external.
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case GlobalValue::ExternalLinkage:
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// If external or appending, declare as a global symbol
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O << "\t.globl " << name << "\n";
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// FALL THROUGH
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case GlobalValue::InternalLinkage:
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if (C->isNullValue())
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SwitchToDataSection(".bss", I);
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else
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SwitchToDataSection(".data", I);
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break;
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case GlobalValue::GhostLinkage:
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cerr << "Should not have any unmaterialized functions!\n";
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abort();
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case GlobalValue::DLLImportLinkage:
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cerr << "DLLImport linkage is not supported by this target!\n";
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abort();
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case GlobalValue::DLLExportLinkage:
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cerr << "DLLExport linkage is not supported by this target!\n";
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abort();
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default:
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assert(0 && "Unknown linkage type!");
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}
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O << "\t.align " << Align << "\n";
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O << "\t.type " << name << ",#object\n";
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O << "\t.size " << name << "," << Size << "\n";
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O << name << ":\n";
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EmitGlobalConstant(C);
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}
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}
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O << '\n';
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return AsmPrinter::doFinalization(M);
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}
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void SparcAsmPrinter::printModuleLevelGV(const GlobalVariable* GVar) {
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const TargetData *TD = TM.getTargetData();
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if (!GVar->hasInitializer())
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return; // External global require no code
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// Check to see if this is a special global used by LLVM, if so, emit it.
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if (EmitSpecialLLVMGlobal(GVar))
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return;
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O << "\n\n";
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std::string SectionName = TAI->SectionForGlobal(GVar);
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std::string name = Mang->getValueName(GVar);
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Constant *C = GVar->getInitializer();
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unsigned Size = TD->getABITypeSize(C->getType());
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unsigned Align = TD->getPreferredAlignment(GVar);
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// FIXME: ELF supports visibility
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SwitchToDataSection(SectionName.c_str());
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if (C->isNullValue() && !GVar->hasSection()) {
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if (!GVar->isThreadLocal() &&
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(GVar->hasInternalLinkage() || GVar->isWeakForLinker())) {
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if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
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if (GVar->hasInternalLinkage())
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O << "\t.local " << name << "\n";
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O << TAI->getCOMMDirective() << name << ',' << Size;
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if (TAI->getCOMMDirectiveTakesAlignment())
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O << ',' << (1 << Align);
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O << '\n';
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return;
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}
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}
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switch (GVar->getLinkage()) {
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case GlobalValue::CommonLinkage:
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case GlobalValue::LinkOnceLinkage:
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case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
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// Nonnull linkonce -> weak
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O << "\t.weak " << name << "\n";
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break;
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case GlobalValue::AppendingLinkage:
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// FIXME: appending linkage variables should go into a section of
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// their name or something. For now, just emit them as external.
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case GlobalValue::ExternalLinkage:
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// If external or appending, declare as a global symbol
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O << TAI->getGlobalDirective() << name << "\n";
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// FALL THROUGH
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case GlobalValue::InternalLinkage:
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break;
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case GlobalValue::GhostLinkage:
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cerr << "Should not have any unmaterialized functions!\n";
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abort();
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case GlobalValue::DLLImportLinkage:
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cerr << "DLLImport linkage is not supported by this target!\n";
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abort();
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case GlobalValue::DLLExportLinkage:
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cerr << "DLLExport linkage is not supported by this target!\n";
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abort();
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default:
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assert(0 && "Unknown linkage type!");
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}
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if (Align)
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O << "\t.align " << Align << "\n";
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if (TAI->hasDotTypeDotSizeDirective()) {
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O << "\t.type " << name << ",#object\n";
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O << "\t.size " << name << "," << Size << "\n";
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}
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O << name << ":\n";
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EmitGlobalConstant(C);
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}
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@ -15,11 +15,31 @@
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using namespace llvm;
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SparcTargetAsmInfo::SparcTargetAsmInfo(const SparcTargetMachine &TM) {
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SparcELFTargetAsmInfo::SparcELFTargetAsmInfo(const TargetMachine &TM):
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ELFTargetAsmInfo(TM) {
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Data16bitsDirective = "\t.half\t";
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Data32bitsDirective = "\t.word\t";
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Data64bitsDirective = 0; // .xword is only supported by V9.
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ZeroDirective = "\t.skip\t";
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CommentString = "!";
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ConstantPoolSection = "\t.section \".rodata\",#alloc\n";
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COMMDirectiveTakesAlignment = true;
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}
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std::string SparcELFTargetAsmInfo::PrintSectionFlags(unsigned flags) const {
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std::string Flags = ",";
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if (flags & SectionFlags::Mergeable)
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return ELFTargetAsmInfo::PrintSectionFlags(flags);
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if (!(flags & SectionFlags::Debug))
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Flags += "#alloc";
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if (flags & SectionFlags::Code)
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Flags += "#execinstr";
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if (flags & SectionFlags::Writeable)
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Flags += "#write";
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if (flags & SectionFlags::TLS)
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Flags += "#tls";
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return Flags;
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}
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@ -15,17 +15,19 @@
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#define SPARCTARGETASMINFO_H
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#include "llvm/Target/TargetAsmInfo.h"
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#include "llvm/Target/ELFTargetAsmInfo.h"
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namespace llvm {
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// Forward declaration.
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class SparcTargetMachine;
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class TargetMachine;
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struct SparcTargetAsmInfo : public TargetAsmInfo {
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explicit SparcTargetAsmInfo(const SparcTargetMachine &TM);
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struct SparcELFTargetAsmInfo : public ELFTargetAsmInfo {
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explicit SparcELFTargetAsmInfo(const TargetMachine &TM);
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std::string PrintSectionFlags(unsigned flags) const;
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};
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} // namespace llvm
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#endif
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@ -22,7 +22,8 @@ using namespace llvm;
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static RegisterTarget<SparcTargetMachine> X("sparc", " SPARC");
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const TargetAsmInfo *SparcTargetMachine::createTargetAsmInfo() const {
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return new SparcTargetAsmInfo(*this);
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// FIXME: Handle Solaris subtarget someday :)
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return new SparcELFTargetAsmInfo(*this);
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}
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/// SparcTargetMachine ctor - Create an ILP32 architecture model
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