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Asm printer support, based on x86 - only prints mnemonics for now
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12113 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Brian Gaeke
parent
da69e7d9b3
commit
4acfd039f9
@ -23,8 +23,8 @@ namespace llvm {
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class TargetMachine;
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FunctionPass *createSparcV8SimpleInstructionSelector(TargetMachine &TM);
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// FunctionPass *createSparcV8CodePrinterPass(std::ostream &OS,
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// TargetMachine &TM);
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FunctionPass *createSparcV8CodePrinterPass(std::ostream &OS,
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TargetMachine &TM);
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} // end namespace llvm;
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458
lib/Target/Sparc/SparcAsmPrinter.cpp
Normal file
458
lib/Target/Sparc/SparcAsmPrinter.cpp
Normal file
@ -0,0 +1,458 @@
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//===-- SparcV8AsmPrinter.cpp - SparcV8 LLVM assembly writer --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains a printer that converts from our internal representation
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// of machine-dependent LLVM code to GAS-format Sparc V8 assembly language.
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//
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//===----------------------------------------------------------------------===//
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#include "SparcV8.h"
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#include "SparcV8InstrInfo.h"
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#include "llvm/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Module.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/MachineConstantPool.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Support/Mangler.h"
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#include "Support/Statistic.h"
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#include "Support/StringExtras.h"
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#include "Support/CommandLine.h"
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using namespace llvm;
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namespace {
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Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
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struct V8Printer : public MachineFunctionPass {
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/// Output stream on which we're printing assembly code.
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///
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std::ostream &O;
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/// Target machine description which we query for reg. names, data
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/// layout, etc.
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///
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TargetMachine &TM;
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/// Name-mangler for global names.
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///
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Mangler *Mang;
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V8Printer(std::ostream &o, TargetMachine &tm) : O(o), TM(tm) { }
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/// We name each basic block in a Function with a unique number, so
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/// that we can consistently refer to them later. This is cleared
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/// at the beginning of each call to runOnMachineFunction().
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///
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typedef std::map<const Value *, unsigned> ValueMapTy;
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ValueMapTy NumberForBB;
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/// Cache of mangled name for current function. This is
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/// recalculated at the beginning of each call to
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/// runOnMachineFunction().
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///
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std::string CurrentFnName;
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virtual const char *getPassName() const {
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return "SparcV8 Assembly Printer";
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}
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void emitConstantValueOnly(const Constant *CV);
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void emitGlobalConstant(const Constant *CV);
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void printConstantPool(MachineConstantPool *MCP);
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void printMachineInstruction(const MachineInstr *MI);
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bool runOnMachineFunction(MachineFunction &F);
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bool doInitialization(Module &M);
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bool doFinalization(Module &M);
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};
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} // end of anonymous namespace
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/// createSparcV8CodePrinterPass - Returns a pass that prints the SparcV8
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/// assembly code for a MachineFunction to the given output stream,
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/// using the given target machine description. This should work
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/// regardless of whether the function is in SSA form.
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///
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FunctionPass *llvm::createSparcV8CodePrinterPass (std::ostream &o,
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TargetMachine &tm) {
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return new V8Printer(o, tm);
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}
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/// toOctal - Convert the low order bits of X into an octal digit.
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///
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static inline char toOctal(int X) {
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return (X&7)+'0';
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}
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/// getAsCString - Return the specified array as a C compatible
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/// string, only if the predicate isStringCompatible is true.
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///
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static void printAsCString(std::ostream &O, const ConstantArray *CVA) {
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assert(CVA->isString() && "Array is not string compatible!");
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O << "\"";
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for (unsigned i = 0; i != CVA->getNumOperands(); ++i) {
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unsigned char C = cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
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if (C == '"') {
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O << "\\\"";
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} else if (C == '\\') {
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O << "\\\\";
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} else if (isprint(C)) {
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O << C;
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} else {
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switch(C) {
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case '\b': O << "\\b"; break;
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case '\f': O << "\\f"; break;
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case '\n': O << "\\n"; break;
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case '\r': O << "\\r"; break;
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case '\t': O << "\\t"; break;
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default:
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O << '\\';
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O << toOctal(C >> 6);
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O << toOctal(C >> 3);
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O << toOctal(C >> 0);
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break;
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}
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}
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}
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O << "\"";
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}
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// Print out the specified constant, without a storage class. Only the
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// constants valid in constant expressions can occur here.
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void V8Printer::emitConstantValueOnly(const Constant *CV) {
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if (CV->isNullValue())
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O << "0";
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else if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV)) {
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assert(CB == ConstantBool::True);
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O << "1";
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} else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
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if (((CI->getValue() << 32) >> 32) == CI->getValue())
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O << CI->getValue();
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else
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O << (unsigned long long)CI->getValue();
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else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
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O << CI->getValue();
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else if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(CV))
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// This is a constant address for a global variable or function. Use the
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// name of the variable or function as the address value.
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O << Mang->getValueName(CPR->getValue());
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else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
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const TargetData &TD = TM.getTargetData();
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switch(CE->getOpcode()) {
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case Instruction::GetElementPtr: {
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// generate a symbolic expression for the byte address
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const Constant *ptrVal = CE->getOperand(0);
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std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
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if (unsigned Offset = TD.getIndexedOffset(ptrVal->getType(), idxVec)) {
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O << "(";
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emitConstantValueOnly(ptrVal);
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O << ") + " << Offset;
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} else {
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emitConstantValueOnly(ptrVal);
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}
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break;
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}
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case Instruction::Cast: {
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// Support only non-converting or widening casts for now, that is, ones
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// that do not involve a change in value. This assertion is really gross,
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// and may not even be a complete check.
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Constant *Op = CE->getOperand(0);
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const Type *OpTy = Op->getType(), *Ty = CE->getType();
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// Pointers on ILP32 machines can be losslessly converted back and
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// forth into 32-bit or wider integers, regardless of signedness.
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assert(((isa<PointerType>(OpTy)
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&& (Ty == Type::LongTy || Ty == Type::ULongTy
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|| Ty == Type::IntTy || Ty == Type::UIntTy))
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|| (isa<PointerType>(Ty)
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&& (OpTy == Type::LongTy || OpTy == Type::ULongTy
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|| OpTy == Type::IntTy || OpTy == Type::UIntTy))
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|| (((TD.getTypeSize(Ty) >= TD.getTypeSize(OpTy))
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&& OpTy->isLosslesslyConvertibleTo(Ty))))
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&& "FIXME: Don't yet support this kind of constant cast expr");
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O << "(";
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emitConstantValueOnly(Op);
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O << ")";
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break;
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}
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case Instruction::Add:
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O << "(";
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emitConstantValueOnly(CE->getOperand(0));
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O << ") + (";
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emitConstantValueOnly(CE->getOperand(1));
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O << ")";
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break;
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default:
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assert(0 && "Unsupported operator!");
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}
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} else {
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assert(0 && "Unknown constant value!");
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}
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}
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// Print a constant value or values, with the appropriate storage class as a
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// prefix.
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void V8Printer::emitGlobalConstant(const Constant *CV) {
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const TargetData &TD = TM.getTargetData();
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if (CV->isNullValue()) {
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O << "\t.zero\t " << TD.getTypeSize(CV->getType()) << "\n";
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return;
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} else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
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if (CVA->isString()) {
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O << "\t.ascii\t";
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printAsCString(O, CVA);
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O << "\n";
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} else { // Not a string. Print the values in successive locations
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const std::vector<Use> &constValues = CVA->getValues();
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for (unsigned i=0; i < constValues.size(); i++)
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emitGlobalConstant(cast<Constant>(constValues[i].get()));
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}
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return;
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} else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
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// Print the fields in successive locations. Pad to align if needed!
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const StructLayout *cvsLayout = TD.getStructLayout(CVS->getType());
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const std::vector<Use>& constValues = CVS->getValues();
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unsigned sizeSoFar = 0;
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for (unsigned i=0, N = constValues.size(); i < N; i++) {
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const Constant* field = cast<Constant>(constValues[i].get());
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// Check if padding is needed and insert one or more 0s.
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unsigned fieldSize = TD.getTypeSize(field->getType());
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unsigned padSize = ((i == N-1? cvsLayout->StructSize
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: cvsLayout->MemberOffsets[i+1])
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- cvsLayout->MemberOffsets[i]) - fieldSize;
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sizeSoFar += fieldSize + padSize;
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// Now print the actual field value
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emitGlobalConstant(field);
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// Insert the field padding unless it's zero bytes...
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if (padSize)
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O << "\t.zero\t " << padSize << "\n";
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}
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assert(sizeSoFar == cvsLayout->StructSize &&
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"Layout of constant struct may be incorrect!");
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return;
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} else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
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// FP Constants are printed as integer constants to avoid losing
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// precision...
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double Val = CFP->getValue();
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switch (CFP->getType()->getPrimitiveID()) {
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default: assert(0 && "Unknown floating point type!");
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case Type::FloatTyID: {
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union FU { // Abide by C TBAA rules
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float FVal;
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unsigned UVal;
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} U;
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U.FVal = Val;
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O << ".long\t" << U.UVal << "\t# float " << Val << "\n";
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return;
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}
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case Type::DoubleTyID: {
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union DU { // Abide by C TBAA rules
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double FVal;
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uint64_t UVal;
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} U;
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U.FVal = Val;
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O << ".quad\t" << U.UVal << "\t# double " << Val << "\n";
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return;
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}
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}
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}
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const Type *type = CV->getType();
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O << "\t";
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switch (type->getPrimitiveID()) {
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case Type::BoolTyID: case Type::UByteTyID: case Type::SByteTyID:
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O << ".byte";
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break;
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case Type::UShortTyID: case Type::ShortTyID:
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O << ".word";
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break;
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case Type::FloatTyID: case Type::PointerTyID:
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case Type::UIntTyID: case Type::IntTyID:
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O << ".long";
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break;
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case Type::DoubleTyID:
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case Type::ULongTyID: case Type::LongTyID:
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O << ".quad";
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break;
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default:
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assert (0 && "Can't handle printing this type of thing");
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break;
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}
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O << "\t";
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emitConstantValueOnly(CV);
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O << "\n";
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}
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/// printConstantPool - Print to the current output stream assembly
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/// representations of the constants in the constant pool MCP. This is
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/// used to print out constants which have been "spilled to memory" by
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/// the code generator.
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///
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void V8Printer::printConstantPool(MachineConstantPool *MCP) {
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const std::vector<Constant*> &CP = MCP->getConstants();
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const TargetData &TD = TM.getTargetData();
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if (CP.empty()) return;
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for (unsigned i = 0, e = CP.size(); i != e; ++i) {
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O << "\t.section .rodata\n";
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O << "\t.align " << (unsigned)TD.getTypeAlignment(CP[i]->getType())
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<< "\n";
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O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t#"
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<< *CP[i] << "\n";
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emitGlobalConstant(CP[i]);
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}
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}
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/// runOnMachineFunction - This uses the printMachineInstruction()
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/// method to print assembly for each instruction.
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///
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bool V8Printer::runOnMachineFunction(MachineFunction &MF) {
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// BBNumber is used here so that a given Printer will never give two
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// BBs the same name. (If you have a better way, please let me know!)
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static unsigned BBNumber = 0;
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O << "\n\n";
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// What's my mangled name?
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CurrentFnName = Mang->getValueName(MF.getFunction());
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// Print out constants referenced by the function
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printConstantPool(MF.getConstantPool());
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// Print out labels for the function.
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O << "\t.text\n";
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O << "\t.align 16\n";
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O << "\t.globl\t" << CurrentFnName << "\n";
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O << "\t.type\t" << CurrentFnName << ", @function\n";
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O << CurrentFnName << ":\n";
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// Number each basic block so that we can consistently refer to them
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// in PC-relative references.
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NumberForBB.clear();
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for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
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I != E; ++I) {
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NumberForBB[I->getBasicBlock()] = BBNumber++;
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}
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// Print out code for the function.
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for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
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I != E; ++I) {
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// Print a label for the basic block.
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O << ".LBB" << NumberForBB[I->getBasicBlock()] << ":\t# "
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<< I->getBasicBlock()->getName() << "\n";
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for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
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II != E; ++II) {
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// Print the assembly for the instruction.
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O << "\t";
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printMachineInstruction(II);
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}
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}
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// We didn't modify anything.
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return false;
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}
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/// printMachineInstruction -- Print out a single SparcV8 LLVM instruction
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/// MI in GAS syntax to the current output stream.
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///
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void V8Printer::printMachineInstruction(const MachineInstr *MI) {
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unsigned Opcode = MI->getOpcode();
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const TargetInstrInfo &TII = TM.getInstrInfo();
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const TargetInstrDescriptor &Desc = TII.get(Opcode);
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O << Desc.Name << "\n"; // not yet done
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}
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bool V8Printer::doInitialization(Module &M) {
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Mang = new Mangler(M);
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return false; // success
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}
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// SwitchSection - Switch to the specified section of the executable if we are
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// not already in it!
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//
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static void SwitchSection(std::ostream &OS, std::string &CurSection,
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const char *NewSection) {
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if (CurSection != NewSection) {
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CurSection = NewSection;
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if (!CurSection.empty())
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OS << "\t" << NewSection << "\n";
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}
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}
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bool V8Printer::doFinalization(Module &M) {
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const TargetData &TD = TM.getTargetData();
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std::string CurSection;
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// Print out module-level global variables here.
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for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
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if (I->hasInitializer()) { // External global require no code
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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.getTypeSize(C->getType());
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unsigned Align = TD.getTypeAlignment(C->getType());
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if (C->isNullValue() &&
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(I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
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I->hasWeakLinkage() /* FIXME: Verify correct */)) {
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SwitchSection(O, CurSection, ".data");
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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.getTypeSize(C->getType())
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<< "," << (unsigned)TD.getTypeAlignment(C->getType());
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O << "\t\t# ";
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WriteAsOperand(O, I, true, true, &M);
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O << "\n";
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} else {
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switch (I->getLinkage()) {
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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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SwitchSection(O, CurSection, "");
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O << "\t.section\t.llvm.linkonce.d." << name << ",\"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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||||
SwitchSection(O, CurSection, ".bss");
|
||||
else
|
||||
SwitchSection(O, CurSection, ".data");
|
||||
break;
|
||||
}
|
||||
|
||||
O << "\t.align " << Align << "\n";
|
||||
O << "\t.type " << name << ",@object\n";
|
||||
O << "\t.size " << name << "," << Size << "\n";
|
||||
O << name << ":\t\t\t\t# ";
|
||||
WriteAsOperand(O, I, true, true, &M);
|
||||
O << " = ";
|
||||
WriteAsOperand(O, C, false, false, &M);
|
||||
O << "\n";
|
||||
emitGlobalConstant(C);
|
||||
}
|
||||
}
|
||||
|
||||
delete Mang;
|
||||
return false; // success
|
||||
}
|
||||
@ -53,6 +53,8 @@ bool SparcV8TargetMachine::addPassesToEmitAssembly(PassManager &PM,
|
||||
// are producing.
|
||||
PM.add(createMachineFunctionPrinterPass(&Out));
|
||||
|
||||
PM.add(createSparcV8CodePrinterPass(Out, *this));
|
||||
|
||||
PM.add(createMachineCodeDeleter());
|
||||
return false;
|
||||
}
|
||||
|
||||
@ -23,8 +23,8 @@ namespace llvm {
|
||||
class TargetMachine;
|
||||
|
||||
FunctionPass *createSparcV8SimpleInstructionSelector(TargetMachine &TM);
|
||||
// FunctionPass *createSparcV8CodePrinterPass(std::ostream &OS,
|
||||
// TargetMachine &TM);
|
||||
FunctionPass *createSparcV8CodePrinterPass(std::ostream &OS,
|
||||
TargetMachine &TM);
|
||||
|
||||
} // end namespace llvm;
|
||||
|
||||
|
||||
458
lib/Target/SparcV8/SparcV8AsmPrinter.cpp
Normal file
458
lib/Target/SparcV8/SparcV8AsmPrinter.cpp
Normal file
@ -0,0 +1,458 @@
|
||||
//===-- SparcV8AsmPrinter.cpp - SparcV8 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 V8 assembly language.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#include "SparcV8.h"
|
||||
#include "SparcV8InstrInfo.h"
|
||||
#include "llvm/Constants.h"
|
||||
#include "llvm/DerivedTypes.h"
|
||||
#include "llvm/Module.h"
|
||||
#include "llvm/Assembly/Writer.h"
|
||||
#include "llvm/CodeGen/MachineFunctionPass.h"
|
||||
#include "llvm/CodeGen/MachineConstantPool.h"
|
||||
#include "llvm/CodeGen/MachineInstr.h"
|
||||
#include "llvm/Target/TargetMachine.h"
|
||||
#include "llvm/Support/Mangler.h"
|
||||
#include "Support/Statistic.h"
|
||||
#include "Support/StringExtras.h"
|
||||
#include "Support/CommandLine.h"
|
||||
using namespace llvm;
|
||||
|
||||
namespace {
|
||||
Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
|
||||
|
||||
struct V8Printer : public MachineFunctionPass {
|
||||
/// Output stream on which we're printing assembly code.
|
||||
///
|
||||
std::ostream &O;
|
||||
|
||||
/// Target machine description which we query for reg. names, data
|
||||
/// layout, etc.
|
||||
///
|
||||
TargetMachine &TM;
|
||||
|
||||
/// Name-mangler for global names.
|
||||
///
|
||||
Mangler *Mang;
|
||||
|
||||
V8Printer(std::ostream &o, TargetMachine &tm) : O(o), TM(tm) { }
|
||||
|
||||
/// 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;
|
||||
|
||||
/// Cache of mangled name for current function. This is
|
||||
/// recalculated at the beginning of each call to
|
||||
/// runOnMachineFunction().
|
||||
///
|
||||
std::string CurrentFnName;
|
||||
|
||||
virtual const char *getPassName() const {
|
||||
return "SparcV8 Assembly Printer";
|
||||
}
|
||||
|
||||
void emitConstantValueOnly(const Constant *CV);
|
||||
void emitGlobalConstant(const Constant *CV);
|
||||
void printConstantPool(MachineConstantPool *MCP);
|
||||
void printMachineInstruction(const MachineInstr *MI);
|
||||
bool runOnMachineFunction(MachineFunction &F);
|
||||
bool doInitialization(Module &M);
|
||||
bool doFinalization(Module &M);
|
||||
};
|
||||
} // end of anonymous namespace
|
||||
|
||||
/// createSparcV8CodePrinterPass - Returns a pass that prints the SparcV8
|
||||
/// 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::createSparcV8CodePrinterPass (std::ostream &o,
|
||||
TargetMachine &tm) {
|
||||
return new V8Printer(o, tm);
|
||||
}
|
||||
|
||||
/// toOctal - Convert the low order bits of X into an octal digit.
|
||||
///
|
||||
static inline char toOctal(int X) {
|
||||
return (X&7)+'0';
|
||||
}
|
||||
|
||||
/// getAsCString - Return the specified array as a C compatible
|
||||
/// string, only if the predicate isStringCompatible is true.
|
||||
///
|
||||
static void printAsCString(std::ostream &O, const ConstantArray *CVA) {
|
||||
assert(CVA->isString() && "Array is not string compatible!");
|
||||
|
||||
O << "\"";
|
||||
for (unsigned i = 0; i != CVA->getNumOperands(); ++i) {
|
||||
unsigned char C = cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
|
||||
|
||||
if (C == '"') {
|
||||
O << "\\\"";
|
||||
} else if (C == '\\') {
|
||||
O << "\\\\";
|
||||
} else if (isprint(C)) {
|
||||
O << C;
|
||||
} else {
|
||||
switch(C) {
|
||||
case '\b': O << "\\b"; break;
|
||||
case '\f': O << "\\f"; break;
|
||||
case '\n': O << "\\n"; break;
|
||||
case '\r': O << "\\r"; break;
|
||||
case '\t': O << "\\t"; break;
|
||||
default:
|
||||
O << '\\';
|
||||
O << toOctal(C >> 6);
|
||||
O << toOctal(C >> 3);
|
||||
O << toOctal(C >> 0);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
O << "\"";
|
||||
}
|
||||
|
||||
// Print out the specified constant, without a storage class. Only the
|
||||
// constants valid in constant expressions can occur here.
|
||||
void V8Printer::emitConstantValueOnly(const Constant *CV) {
|
||||
if (CV->isNullValue())
|
||||
O << "0";
|
||||
else if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV)) {
|
||||
assert(CB == ConstantBool::True);
|
||||
O << "1";
|
||||
} else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
|
||||
if (((CI->getValue() << 32) >> 32) == CI->getValue())
|
||||
O << CI->getValue();
|
||||
else
|
||||
O << (unsigned long long)CI->getValue();
|
||||
else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
|
||||
O << CI->getValue();
|
||||
else if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(CV))
|
||||
// This is a constant address for a global variable or function. Use the
|
||||
// name of the variable or function as the address value.
|
||||
O << Mang->getValueName(CPR->getValue());
|
||||
else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
|
||||
const TargetData &TD = TM.getTargetData();
|
||||
switch(CE->getOpcode()) {
|
||||
case Instruction::GetElementPtr: {
|
||||
// generate a symbolic expression for the byte address
|
||||
const Constant *ptrVal = CE->getOperand(0);
|
||||
std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
|
||||
if (unsigned Offset = TD.getIndexedOffset(ptrVal->getType(), idxVec)) {
|
||||
O << "(";
|
||||
emitConstantValueOnly(ptrVal);
|
||||
O << ") + " << Offset;
|
||||
} else {
|
||||
emitConstantValueOnly(ptrVal);
|
||||
}
|
||||
break;
|
||||
}
|
||||
case Instruction::Cast: {
|
||||
// Support only non-converting or widening casts for now, that is, ones
|
||||
// that do not involve a change in value. This assertion is really gross,
|
||||
// and may not even be a complete check.
|
||||
Constant *Op = CE->getOperand(0);
|
||||
const Type *OpTy = Op->getType(), *Ty = CE->getType();
|
||||
|
||||
// Pointers on ILP32 machines can be losslessly converted back and
|
||||
// forth into 32-bit or wider integers, regardless of signedness.
|
||||
assert(((isa<PointerType>(OpTy)
|
||||
&& (Ty == Type::LongTy || Ty == Type::ULongTy
|
||||
|| Ty == Type::IntTy || Ty == Type::UIntTy))
|
||||
|| (isa<PointerType>(Ty)
|
||||
&& (OpTy == Type::LongTy || OpTy == Type::ULongTy
|
||||
|| OpTy == Type::IntTy || OpTy == Type::UIntTy))
|
||||
|| (((TD.getTypeSize(Ty) >= TD.getTypeSize(OpTy))
|
||||
&& OpTy->isLosslesslyConvertibleTo(Ty))))
|
||||
&& "FIXME: Don't yet support this kind of constant cast expr");
|
||||
O << "(";
|
||||
emitConstantValueOnly(Op);
|
||||
O << ")";
|
||||
break;
|
||||
}
|
||||
case Instruction::Add:
|
||||
O << "(";
|
||||
emitConstantValueOnly(CE->getOperand(0));
|
||||
O << ") + (";
|
||||
emitConstantValueOnly(CE->getOperand(1));
|
||||
O << ")";
|
||||
break;
|
||||
default:
|
||||
assert(0 && "Unsupported operator!");
|
||||
}
|
||||
} else {
|
||||
assert(0 && "Unknown constant value!");
|
||||
}
|
||||
}
|
||||
|
||||
// Print a constant value or values, with the appropriate storage class as a
|
||||
// prefix.
|
||||
void V8Printer::emitGlobalConstant(const Constant *CV) {
|
||||
const TargetData &TD = TM.getTargetData();
|
||||
|
||||
if (CV->isNullValue()) {
|
||||
O << "\t.zero\t " << TD.getTypeSize(CV->getType()) << "\n";
|
||||
return;
|
||||
} else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
|
||||
if (CVA->isString()) {
|
||||
O << "\t.ascii\t";
|
||||
printAsCString(O, CVA);
|
||||
O << "\n";
|
||||
} else { // Not a string. Print the values in successive locations
|
||||
const std::vector<Use> &constValues = CVA->getValues();
|
||||
for (unsigned i=0; i < constValues.size(); i++)
|
||||
emitGlobalConstant(cast<Constant>(constValues[i].get()));
|
||||
}
|
||||
return;
|
||||
} else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
|
||||
// Print the fields in successive locations. Pad to align if needed!
|
||||
const StructLayout *cvsLayout = TD.getStructLayout(CVS->getType());
|
||||
const std::vector<Use>& constValues = CVS->getValues();
|
||||
unsigned sizeSoFar = 0;
|
||||
for (unsigned i=0, N = constValues.size(); i < N; i++) {
|
||||
const Constant* field = cast<Constant>(constValues[i].get());
|
||||
|
||||
// Check if padding is needed and insert one or more 0s.
|
||||
unsigned fieldSize = TD.getTypeSize(field->getType());
|
||||
unsigned padSize = ((i == N-1? cvsLayout->StructSize
|
||||
: cvsLayout->MemberOffsets[i+1])
|
||||
- cvsLayout->MemberOffsets[i]) - fieldSize;
|
||||
sizeSoFar += fieldSize + padSize;
|
||||
|
||||
// Now print the actual field value
|
||||
emitGlobalConstant(field);
|
||||
|
||||
// Insert the field padding unless it's zero bytes...
|
||||
if (padSize)
|
||||
O << "\t.zero\t " << padSize << "\n";
|
||||
}
|
||||
assert(sizeSoFar == cvsLayout->StructSize &&
|
||||
"Layout of constant struct may be incorrect!");
|
||||
return;
|
||||
} else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
|
||||
// FP Constants are printed as integer constants to avoid losing
|
||||
// precision...
|
||||
double Val = CFP->getValue();
|
||||
switch (CFP->getType()->getPrimitiveID()) {
|
||||
default: assert(0 && "Unknown floating point type!");
|
||||
case Type::FloatTyID: {
|
||||
union FU { // Abide by C TBAA rules
|
||||
float FVal;
|
||||
unsigned UVal;
|
||||
} U;
|
||||
U.FVal = Val;
|
||||
O << ".long\t" << U.UVal << "\t# float " << Val << "\n";
|
||||
return;
|
||||
}
|
||||
case Type::DoubleTyID: {
|
||||
union DU { // Abide by C TBAA rules
|
||||
double FVal;
|
||||
uint64_t UVal;
|
||||
} U;
|
||||
U.FVal = Val;
|
||||
O << ".quad\t" << U.UVal << "\t# double " << Val << "\n";
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
const Type *type = CV->getType();
|
||||
O << "\t";
|
||||
switch (type->getPrimitiveID()) {
|
||||
case Type::BoolTyID: case Type::UByteTyID: case Type::SByteTyID:
|
||||
O << ".byte";
|
||||
break;
|
||||
case Type::UShortTyID: case Type::ShortTyID:
|
||||
O << ".word";
|
||||
break;
|
||||
case Type::FloatTyID: case Type::PointerTyID:
|
||||
case Type::UIntTyID: case Type::IntTyID:
|
||||
O << ".long";
|
||||
break;
|
||||
case Type::DoubleTyID:
|
||||
case Type::ULongTyID: case Type::LongTyID:
|
||||
O << ".quad";
|
||||
break;
|
||||
default:
|
||||
assert (0 && "Can't handle printing this type of thing");
|
||||
break;
|
||||
}
|
||||
O << "\t";
|
||||
emitConstantValueOnly(CV);
|
||||
O << "\n";
|
||||
}
|
||||
|
||||
/// printConstantPool - Print to the current output stream assembly
|
||||
/// representations of the constants in the constant pool MCP. This is
|
||||
/// used to print out constants which have been "spilled to memory" by
|
||||
/// the code generator.
|
||||
///
|
||||
void V8Printer::printConstantPool(MachineConstantPool *MCP) {
|
||||
const std::vector<Constant*> &CP = MCP->getConstants();
|
||||
const TargetData &TD = TM.getTargetData();
|
||||
|
||||
if (CP.empty()) return;
|
||||
|
||||
for (unsigned i = 0, e = CP.size(); i != e; ++i) {
|
||||
O << "\t.section .rodata\n";
|
||||
O << "\t.align " << (unsigned)TD.getTypeAlignment(CP[i]->getType())
|
||||
<< "\n";
|
||||
O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t#"
|
||||
<< *CP[i] << "\n";
|
||||
emitGlobalConstant(CP[i]);
|
||||
}
|
||||
}
|
||||
|
||||
/// runOnMachineFunction - This uses the printMachineInstruction()
|
||||
/// method to print assembly for each instruction.
|
||||
///
|
||||
bool V8Printer::runOnMachineFunction(MachineFunction &MF) {
|
||||
// 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 constants referenced by the function
|
||||
printConstantPool(MF.getConstantPool());
|
||||
|
||||
// Print out labels for the function.
|
||||
O << "\t.text\n";
|
||||
O << "\t.align 16\n";
|
||||
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.
|
||||
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.
|
||||
O << ".LBB" << NumberForBB[I->getBasicBlock()] << ":\t# "
|
||||
<< I->getBasicBlock()->getName() << "\n";
|
||||
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
|
||||
II != E; ++II) {
|
||||
// Print the assembly for the instruction.
|
||||
O << "\t";
|
||||
printMachineInstruction(II);
|
||||
}
|
||||
}
|
||||
|
||||
// We didn't modify anything.
|
||||
return false;
|
||||
}
|
||||
|
||||
/// printMachineInstruction -- Print out a single SparcV8 LLVM instruction
|
||||
/// MI in GAS syntax to the current output stream.
|
||||
///
|
||||
void V8Printer::printMachineInstruction(const MachineInstr *MI) {
|
||||
unsigned Opcode = MI->getOpcode();
|
||||
const TargetInstrInfo &TII = TM.getInstrInfo();
|
||||
const TargetInstrDescriptor &Desc = TII.get(Opcode);
|
||||
O << Desc.Name << "\n"; // not yet done
|
||||
}
|
||||
|
||||
bool V8Printer::doInitialization(Module &M) {
|
||||
Mang = new Mangler(M);
|
||||
return false; // success
|
||||
}
|
||||
|
||||
// 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";
|
||||
}
|
||||
}
|
||||
|
||||
bool V8Printer::doFinalization(Module &M) {
|
||||
const TargetData &TD = TM.getTargetData();
|
||||
std::string CurSection;
|
||||
|
||||
// Print out module-level global variables here.
|
||||
for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
|
||||
if (I->hasInitializer()) { // External global require no code
|
||||
O << "\n\n";
|
||||
std::string name = Mang->getValueName(I);
|
||||
Constant *C = I->getInitializer();
|
||||
unsigned Size = TD.getTypeSize(C->getType());
|
||||
unsigned Align = TD.getTypeAlignment(C->getType());
|
||||
|
||||
if (C->isNullValue() &&
|
||||
(I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
|
||||
I->hasWeakLinkage() /* FIXME: Verify correct */)) {
|
||||
SwitchSection(O, CurSection, ".data");
|
||||
if (I->hasInternalLinkage())
|
||||
O << "\t.local " << name << "\n";
|
||||
|
||||
O << "\t.comm " << name << "," << TD.getTypeSize(C->getType())
|
||||
<< "," << (unsigned)TD.getTypeAlignment(C->getType());
|
||||
O << "\t\t# ";
|
||||
WriteAsOperand(O, I, true, true, &M);
|
||||
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";
|
||||
SwitchSection(O, CurSection, "");
|
||||
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())
|
||||
SwitchSection(O, CurSection, ".bss");
|
||||
else
|
||||
SwitchSection(O, CurSection, ".data");
|
||||
break;
|
||||
}
|
||||
|
||||
O << "\t.align " << Align << "\n";
|
||||
O << "\t.type " << name << ",@object\n";
|
||||
O << "\t.size " << name << "," << Size << "\n";
|
||||
O << name << ":\t\t\t\t# ";
|
||||
WriteAsOperand(O, I, true, true, &M);
|
||||
O << " = ";
|
||||
WriteAsOperand(O, C, false, false, &M);
|
||||
O << "\n";
|
||||
emitGlobalConstant(C);
|
||||
}
|
||||
}
|
||||
|
||||
delete Mang;
|
||||
return false; // success
|
||||
}
|
||||
@ -53,6 +53,8 @@ bool SparcV8TargetMachine::addPassesToEmitAssembly(PassManager &PM,
|
||||
// are producing.
|
||||
PM.add(createMachineFunctionPrinterPass(&Out));
|
||||
|
||||
PM.add(createSparcV8CodePrinterPass(Out, *this));
|
||||
|
||||
PM.add(createMachineCodeDeleter());
|
||||
return false;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user