It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Sparc/SparcAsmPrinter.cpp b/lib/Target/Sparc/SparcAsmPrinter.cpp
new file mode 100644
index 0000000..1f82326
--- /dev/null
+++ b/lib/Target/Sparc/SparcAsmPrinter.cpp
@@ -0,0 +1,291 @@
+//===-- SparcAsmPrinter.cpp - Sparc LLVM assembly writer ------------------===//
+//
+// 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 GAS-format SPARC assembly language.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "asm-printer"
+#include "Sparc.h"
+#include "SparcInstrInfo.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Module.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/MathExtras.h"
+#include <cctype>
+using namespace llvm;
+
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
+
+namespace {
+ struct VISIBILITY_HIDDEN SparcAsmPrinter : public AsmPrinter {
+ SparcAsmPrinter(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;
+
+ virtual const char *getPassName() const {
+ return "Sparc Assembly Printer";
+ }
+
+ void printOperand(const MachineInstr *MI, int opNum);
+ void printMemOperand(const MachineInstr *MI, int opNum,
+ const char *Modifier = 0);
+ void printCCOperand(const MachineInstr *MI, int opNum);
+
+ bool printInstruction(const MachineInstr *MI); // autogenerated.
+ bool runOnMachineFunction(MachineFunction &F);
+ bool doInitialization(Module &M);
+ bool doFinalization(Module &M);
+ };
+} // end of anonymous namespace
+
+#include "SparcGenAsmWriter.inc"
+
+/// createSparcCodePrinterPass - Returns a pass that prints the SPARC
+/// assembly code for a MachineFunction to the given output stream,
+/// using the given target machine description. This should work
+/// regardless of whether the function is in SSA form.
+///
+FunctionPass *llvm::createSparcCodePrinterPass(std::ostream &o,
+ TargetMachine &tm) {
+ return new SparcAsmPrinter(o, tm, tm.getTargetAsmInfo());
+}
+
+/// runOnMachineFunction - This uses the printMachineInstruction()
+/// method to print assembly for each instruction.
+///
+bool SparcAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+ SetupMachineFunction(MF);
+
+ // Print out constants referenced by the function
+ EmitConstantPool(MF.getConstantPool());
+
+ // BBNumber is used here so that a given Printer will never give two
+ // BBs the same name. (If you have a better way, please let me know!)
+ static unsigned BBNumber = 0;
+
+ O << "\n\n";
+ // What's my mangled name?
+ CurrentFnName = Mang->getValueName(MF.getFunction());
+
+ // Print out the label for the function.
+ const Function *F = MF.getFunction();
+ SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
+ EmitAlignment(4, F);
+ O << "\t.globl\t" << CurrentFnName << "\n";
+ O << "\t.type\t" << CurrentFnName << ", #function\n";
+ O << CurrentFnName << ":\n";
+
+ // Number each basic block so that we can consistently refer to them
+ // in PC-relative references.
+ // FIXME: Why not use the MBB numbers?
+ NumberForBB.clear();
+ for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
+ I != E; ++I) {
+ NumberForBB[I->getBasicBlock()] = BBNumber++;
+ }
+
+ // 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";
+ printInstruction(II);
+ ++EmittedInsts;
+ }
+ }
+
+ // We didn't modify anything.
+ return false;
+}
+
+void SparcAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
+ const MachineOperand &MO = MI->getOperand (opNum);
+ const MRegisterInfo &RI = *TM.getRegisterInfo();
+ bool CloseParen = false;
+ if (MI->getOpcode() == SP::SETHIi && !MO.isRegister() && !MO.isImmediate()) {
+ O << "%hi(";
+ CloseParen = true;
+ } else if ((MI->getOpcode() == SP::ORri || MI->getOpcode() == SP::ADDri)
+ && !MO.isRegister() && !MO.isImmediate()) {
+ O << "%lo(";
+ CloseParen = true;
+ }
+ switch (MO.getType()) {
+ case MachineOperand::MO_Register:
+ if (MRegisterInfo::isPhysicalRegister(MO.getReg()))
+ O << "%" << LowercaseString (RI.get(MO.getReg()).Name);
+ else
+ O << "%reg" << MO.getReg();
+ break;
+
+ case MachineOperand::MO_Immediate:
+ O << (int)MO.getImmedValue();
+ break;
+ case MachineOperand::MO_MachineBasicBlock:
+ printBasicBlockLabel(MO.getMachineBasicBlock());
+ return;
+ case MachineOperand::MO_GlobalAddress:
+ O << Mang->getValueName(MO.getGlobal());
+ break;
+ case MachineOperand::MO_ExternalSymbol:
+ O << MO.getSymbolName();
+ break;
+ case MachineOperand::MO_ConstantPoolIndex:
+ O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
+ << MO.getConstantPoolIndex();
+ break;
+ default:
+ O << "<unknown operand type>"; abort (); break;
+ }
+ if (CloseParen) O << ")";
+}
+
+void SparcAsmPrinter::printMemOperand(const MachineInstr *MI, int opNum,
+ const char *Modifier) {
+ printOperand(MI, opNum);
+
+ // If this is an ADD operand, emit it like normal operands.
+ if (Modifier && !strcmp(Modifier, "arith")) {
+ O << ", ";
+ printOperand(MI, opNum+1);
+ return;
+ }
+
+ if (MI->getOperand(opNum+1).isRegister() &&
+ MI->getOperand(opNum+1).getReg() == SP::G0)
+ return; // don't print "+%g0"
+ if (MI->getOperand(opNum+1).isImmediate() &&
+ MI->getOperand(opNum+1).getImmedValue() == 0)
+ return; // don't print "+0"
+
+ O << "+";
+ if (MI->getOperand(opNum+1).isGlobalAddress() ||
+ MI->getOperand(opNum+1).isConstantPoolIndex()) {
+ O << "%lo(";
+ printOperand(MI, opNum+1);
+ O << ")";
+ } else {
+ printOperand(MI, opNum+1);
+ }
+}
+
+void SparcAsmPrinter::printCCOperand(const MachineInstr *MI, int opNum) {
+ int CC = (int)MI->getOperand(opNum).getImmedValue();
+ O << SPARCCondCodeToString((SPCC::CondCodes)CC);
+}
+
+
+
+bool SparcAsmPrinter::doInitialization(Module &M) {
+ Mang = new Mangler(M);
+ return false; // success
+}
+
+bool SparcAsmPrinter::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()) { // 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->getPrefTypeAlignment(C->getType());
+
+ if (C->isNullValue() &&
+ (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
+ I->hasWeakLinkage() /* FIXME: Verify correct */)) {
+ SwitchToDataSection(".data", I);
+ if (I->hasInternalLinkage())
+ O << "\t.local " << name << "\n";
+
+ O << "\t.comm " << name << "," << TD->getTypeSize(C->getType())
+ << "," << Align;
+ O << "\n";
+ } else {
+ switch (I->getLinkage()) {
+ case GlobalValue::LinkOnceLinkage:
+ case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
+ // Nonnull linkonce -> weak
+ O << "\t.weak " << name << "\n";
+ SwitchToDataSection("", I);
+ 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:
+ if (C->isNullValue())
+ SwitchToDataSection(".bss", I);
+ else
+ SwitchToDataSection(".data", I);
+ break;
+ case GlobalValue::GhostLinkage:
+ cerr << "Should not have any unmaterialized functions!\n";
+ abort();
+ case GlobalValue::DLLImportLinkage:
+ cerr << "DLLImport linkage is not supported by this target!\n";
+ abort();
+ case GlobalValue::DLLExportLinkage:
+ cerr << "DLLExport linkage is not supported by this target!\n";
+ abort();
+ default:
+ assert(0 && "Unknown linkage type!");
+ }
+
+ O << "\t.align " << Align << "\n";
+ O << "\t.type " << name << ",#object\n";
+ O << "\t.size " << name << "," << Size << "\n";
+ O << name << ":\n";
+ EmitGlobalConstant(C);
+ }
+ }
+
+ AsmPrinter::doFinalization(M);
+ return false; // success
+}