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/Alpha/AlphaAsmPrinter.cpp b/lib/Target/Alpha/AlphaAsmPrinter.cpp
new file mode 100644
index 0000000..0494777
--- /dev/null
+++ b/lib/Target/Alpha/AlphaAsmPrinter.cpp
@@ -0,0 +1,297 @@
+//===-- AlphaAsmPrinter.cpp - Alpha 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 Alpha assembly language.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "asm-printer"
+#include "Alpha.h"
+#include "AlphaInstrInfo.h"
+#include "AlphaTargetMachine.h"
+#include "llvm/Module.h"
+#include "llvm/Type.h"
+#include "llvm/Assembly/Writer.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/ADT/Statistic.h"
+using namespace llvm;
+
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
+
+namespace {
+ struct VISIBILITY_HIDDEN AlphaAsmPrinter : public AsmPrinter {
+
+ /// Unique incrementer for label values for referencing Global values.
+ ///
+
+ AlphaAsmPrinter(std::ostream &o, TargetMachine &tm, const TargetAsmInfo *T)
+ : AsmPrinter(o, tm, T) {
+ }
+
+ virtual const char *getPassName() const {
+ return "Alpha Assembly Printer";
+ }
+ bool printInstruction(const MachineInstr *MI);
+ void printOp(const MachineOperand &MO, bool IsCallOp = false);
+ void printOperand(const MachineInstr *MI, int opNum);
+ void printBaseOffsetPair (const MachineInstr *MI, int i, bool brackets=true);
+ bool runOnMachineFunction(MachineFunction &F);
+ bool doInitialization(Module &M);
+ bool doFinalization(Module &M);
+
+ bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant, const char *ExtraCode);
+ bool PrintAsmMemoryOperand(const MachineInstr *MI,
+ unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode);
+ };
+} // end of anonymous namespace
+
+/// createAlphaCodePrinterPass - Returns a pass that prints the Alpha
+/// 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::createAlphaCodePrinterPass(std::ostream &o,
+ TargetMachine &tm) {
+ return new AlphaAsmPrinter(o, tm, tm.getTargetAsmInfo());
+}
+
+#include "AlphaGenAsmWriter.inc"
+
+void AlphaAsmPrinter::printOperand(const MachineInstr *MI, int opNum)
+{
+ const MachineOperand &MO = MI->getOperand(opNum);
+ if (MO.getType() == MachineOperand::MO_Register) {
+ assert(MRegisterInfo::isPhysicalRegister(MO.getReg())&&"Not physreg??");
+ O << TM.getRegisterInfo()->get(MO.getReg()).Name;
+ } else if (MO.isImmediate()) {
+ O << MO.getImmedValue();
+ assert(MO.getImmedValue() < (1 << 30));
+ } else {
+ printOp(MO);
+ }
+}
+
+
+void AlphaAsmPrinter::printOp(const MachineOperand &MO, bool IsCallOp) {
+ const MRegisterInfo &RI = *TM.getRegisterInfo();
+
+ switch (MO.getType()) {
+ case MachineOperand::MO_Register:
+ O << RI.get(MO.getReg()).Name;
+ return;
+
+ case MachineOperand::MO_Immediate:
+ cerr << "printOp() does not handle immediate values\n";
+ abort();
+ return;
+
+ case MachineOperand::MO_MachineBasicBlock:
+ printBasicBlockLabel(MO.getMachineBasicBlock());
+ return;
+
+ case MachineOperand::MO_ConstantPoolIndex:
+ O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
+ << MO.getConstantPoolIndex();
+ return;
+
+ case MachineOperand::MO_ExternalSymbol:
+ O << MO.getSymbolName();
+ return;
+
+ case MachineOperand::MO_GlobalAddress: {
+ GlobalValue *GV = MO.getGlobal();
+ O << Mang->getValueName(GV);
+ if (GV->isDeclaration() && GV->hasExternalWeakLinkage())
+ ExtWeakSymbols.insert(GV);
+ return;
+ }
+
+ case MachineOperand::MO_JumpTableIndex:
+ O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+ << '_' << MO.getJumpTableIndex();
+ return;
+
+ default:
+ O << "<unknown operand type: " << MO.getType() << ">";
+ return;
+ }
+}
+
+/// runOnMachineFunction - This uses the printMachineInstruction()
+/// method to print assembly for each instruction.
+///
+bool AlphaAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+ SetupMachineFunction(MF);
+ O << "\n\n";
+
+ // Print out constants referenced by the function
+ EmitConstantPool(MF.getConstantPool());
+
+ // Print out jump tables referenced by the function
+ EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
+
+ // Print out labels for the function.
+ const Function *F = MF.getFunction();
+ SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
+
+ EmitAlignment(4, F);
+ switch (F->getLinkage()) {
+ default: assert(0 && "Unknown linkage type!");
+ case Function::InternalLinkage: // Symbols default to internal.
+ break;
+ case Function::ExternalLinkage:
+ O << "\t.globl " << CurrentFnName << "\n";
+ break;
+ case Function::WeakLinkage:
+ case Function::LinkOnceLinkage:
+ O << TAI->getWeakRefDirective() << CurrentFnName << "\n";
+ break;
+ }
+
+ O << "\t.ent " << CurrentFnName << "\n";
+
+ O << CurrentFnName << ":\n";
+
+ // Print out code for the function.
+ for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
+ I != E; ++I) {
+ 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.
+ ++EmittedInsts;
+ O << "\t";
+ if (!printInstruction(II)) {
+ assert(0 && "Unhandled instruction in asm writer!");
+ abort();
+ }
+ }
+ }
+
+ O << "\t.end " << CurrentFnName << "\n";
+
+ // We didn't modify anything.
+ return false;
+}
+
+bool AlphaAsmPrinter::doInitialization(Module &M)
+{
+ if(TM.getSubtarget<AlphaSubtarget>().hasCT())
+ O << "\t.arch ev6\n"; //This might need to be ev67, so leave this test here
+ else
+ O << "\t.arch ev6\n";
+ O << "\t.set noat\n";
+ AsmPrinter::doInitialization(M);
+ return false;
+}
+
+bool AlphaAsmPrinter::doFinalization(Module &M) {
+ const TargetData *TD = TM.getTargetData();
+
+ 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);
+
+ //1: hidden?
+ if (I->hasHiddenVisibility())
+ O << TAI->getHiddenDirective() << name << "\n";
+
+ //2: kind
+ switch (I->getLinkage()) {
+ case GlobalValue::LinkOnceLinkage:
+ case GlobalValue::WeakLinkage:
+ O << TAI->getWeakRefDirective() << name << '\n';
+ break;
+ case GlobalValue::AppendingLinkage:
+ case GlobalValue::ExternalLinkage:
+ O << "\t.globl " << name << "\n";
+ break;
+ case GlobalValue::InternalLinkage:
+ break;
+ default:
+ assert(0 && "Unknown linkage type!");
+ cerr << "Unknown linkage type!\n";
+ abort();
+ }
+
+ //3: Section (if changed)
+ if (I->hasSection() &&
+ (I->getSection() == ".ctors" ||
+ I->getSection() == ".dtors")) {
+ std::string SectionName = ".section\t" + I->getSection()
+ + ",\"aw\",@progbits";
+ SwitchToDataSection(SectionName.c_str());
+ } else {
+ if (C->isNullValue())
+ SwitchToDataSection("\t.section\t.bss", I);
+ else
+ SwitchToDataSection("\t.section\t.data", I);
+ }
+
+ //4: Type, Size, Align
+ O << "\t.type\t" << name << ", @object\n";
+ O << "\t.size\t" << name << ", " << Size << "\n";
+ EmitAlignment(Align, I);
+
+ O << name << ":\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';
+ }
+
+ AsmPrinter::doFinalization(M);
+ return false;
+}
+
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
+///
+bool AlphaAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode) {
+ printOperand(MI, OpNo);
+ return false;
+}
+
+bool AlphaAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+ unsigned OpNo,
+ unsigned AsmVariant,
+ const char *ExtraCode) {
+ if (ExtraCode && ExtraCode[0])
+ return true; // Unknown modifier.
+ O << "0(";
+ printOperand(MI, OpNo);
+ O << ")";
+ return false;
+}