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https://github.com/c64scene-ar/llvm-6502.git
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(1) Padding bytes between structure fields (for alignment) were never being emitted into the constant pool so the layout did not match! (2) In printing constants, structures containing structures or arrays were never handled. (3) Support new model for external/uninitialized/initialized globals. Uninitialized globals are no longer emitted since they are external. Initialized globals may go either in .bss or in .data. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4134 91177308-0d34-0410-b5e6-96231b3b80d8
931 lines
29 KiB
C++
931 lines
29 KiB
C++
//===-- EmitAssembly.cpp - Emit Sparc Specific .s File ---------------------==//
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//
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// This file implements all of the stuff neccesary to output a .s file from
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// LLVM. The code in this file assumes that the specified module has already
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// been compiled into the internal data structures of the Module.
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//
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// This code largely consists of two LLVM Pass's: a FunctionPass and a Pass.
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// The FunctionPass is pipelined together with all of the rest of the code
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// generation stages, and the Pass runs at the end to emit code for global
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// variables and such.
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//
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//===----------------------------------------------------------------------===//
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#include "SparcInternals.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/CodeGen/MachineCodeForBasicBlock.h"
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#include "llvm/CodeGen/MachineCodeForMethod.h"
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#include "llvm/GlobalVariable.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/SlotCalculator.h"
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#include "llvm/Pass.h"
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#include "llvm/Assembly/Writer.h"
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#include "Support/StringExtras.h"
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#include <iostream>
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using std::string;
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namespace {
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class GlobalIdTable: public Annotation {
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static AnnotationID AnnotId;
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friend class AsmPrinter; // give access to AnnotId
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typedef hash_map<const Value*, int> ValIdMap;
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typedef ValIdMap::const_iterator ValIdMapConstIterator;
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typedef ValIdMap:: iterator ValIdMapIterator;
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public:
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SlotCalculator Table; // map anonymous values to unique integer IDs
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ValIdMap valToIdMap; // used for values not handled by SlotCalculator
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GlobalIdTable(Module* M) : Annotation(AnnotId), Table(M, true) {}
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};
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AnnotationID GlobalIdTable::AnnotId =
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AnnotationManager::getID("ASM PRINTER GLOBAL TABLE ANNOT");
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//===---------------------------------------------------------------------===//
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// Code Shared By the two printer passes, as a mixin
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//===---------------------------------------------------------------------===//
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class AsmPrinter {
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GlobalIdTable* idTable;
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public:
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std::ostream &toAsm;
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const TargetMachine &Target;
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enum Sections {
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Unknown,
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Text,
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ReadOnlyData,
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InitRWData,
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ZeroInitRWData,
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} CurSection;
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AsmPrinter(std::ostream &os, const TargetMachine &T)
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: idTable(0), toAsm(os), Target(T), CurSection(Unknown) {}
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// (start|end)(Module|Function) - Callback methods to be invoked by subclasses
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void startModule(Module &M) {
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// Create the global id table if it does not already exist
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idTable = (GlobalIdTable*)M.getAnnotation(GlobalIdTable::AnnotId);
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if (idTable == NULL) {
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idTable = new GlobalIdTable(&M);
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M.addAnnotation(idTable);
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}
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}
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void startFunction(Function &F) {
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// Make sure the slot table has information about this function...
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idTable->Table.incorporateFunction(&F);
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}
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void endFunction(Function &) {
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idTable->Table.purgeFunction(); // Forget all about F
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}
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void endModule() {
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}
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// Check if a value is external or accessible from external code.
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bool isExternal(const Value* V) {
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const GlobalValue *GV = dyn_cast<GlobalValue>(V);
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return GV && GV->hasExternalLinkage();
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}
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// enterSection - Use this method to enter a different section of the output
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// executable. This is used to only output neccesary section transitions.
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//
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void enterSection(enum Sections S) {
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if (S == CurSection) return; // Only switch section if neccesary
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CurSection = S;
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toAsm << "\n\t.section ";
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switch (S)
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{
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default: assert(0 && "Bad section name!");
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case Text: toAsm << "\".text\""; break;
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case ReadOnlyData: toAsm << "\".rodata\",#alloc"; break;
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case InitRWData: toAsm << "\".data\",#alloc,#write"; break;
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case ZeroInitRWData: toAsm << "\".bss\",#alloc,#write"; break;
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}
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toAsm << "\n";
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}
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static std::string getValidSymbolName(const string &S) {
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string Result;
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// Symbol names in Sparc assembly language have these rules:
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// (a) Must match { letter | _ | . | $ } { letter | _ | . | $ | digit }*
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// (b) A name beginning in "." is treated as a local name.
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// (c) Names beginning with "_" are reserved by ANSI C and shd not be used.
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//
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if (S[0] == '_' || isdigit(S[0]))
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Result += "ll";
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for (unsigned i = 0; i < S.size(); ++i)
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{
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char C = S[i];
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if (C == '_' || C == '.' || C == '$' || isalpha(C) || isdigit(C))
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Result += C;
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else
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{
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Result += '_';
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Result += char('0' + ((unsigned char)C >> 4));
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Result += char('0' + (C & 0xF));
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}
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}
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return Result;
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}
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// getID - Return a valid identifier for the specified value. Base it on
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// the name of the identifier if possible (qualified by the type), and
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// use a numbered value based on prefix otherwise.
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// FPrefix is always prepended to the output identifier.
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//
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string getID(const Value *V, const char *Prefix, const char *FPrefix = 0) {
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string Result = FPrefix ? FPrefix : ""; // "Forced prefix"
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Result += V->hasName() ? V->getName() : string(Prefix);
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// Qualify all internal names with a unique id.
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if (!isExternal(V)) {
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int valId = idTable->Table.getValSlot(V);
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if (valId == -1) {
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GlobalIdTable::ValIdMapConstIterator I = idTable->valToIdMap.find(V);
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if (I == idTable->valToIdMap.end())
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valId = idTable->valToIdMap[V] = idTable->valToIdMap.size();
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else
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valId = I->second;
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}
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Result = Result + "_" + itostr(valId);
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}
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return getValidSymbolName(Result);
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}
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// getID Wrappers - Ensure consistent usage...
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string getID(const Function *F) {
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return getID(F, "LLVMFunction_");
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}
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string getID(const BasicBlock *BB) {
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return getID(BB, "LL", (".L_"+getID(BB->getParent())+"_").c_str());
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}
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string getID(const GlobalVariable *GV) {
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return getID(GV, "LLVMGlobal_");
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}
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string getID(const Constant *CV) {
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return getID(CV, "LLVMConst_", ".C_");
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}
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string getID(const GlobalValue *GV) {
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if (const GlobalVariable *V = dyn_cast<GlobalVariable>(GV))
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return getID(V);
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else if (const Function *F = dyn_cast<Function>(GV))
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return getID(F);
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assert(0 && "Unexpected type of GlobalValue!");
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return "";
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}
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// ConstantExprToString() - Convert a ConstantExpr to an asm expression
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// and return this as a string.
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std::string ConstantExprToString(const ConstantExpr* CE,
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const TargetMachine& target) {
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std::string S;
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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 Value* ptrVal = CE->getOperand(0);
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std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
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S += "(" + valToExprString(ptrVal, target) + ") + ("
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+ utostr(target.DataLayout.getIndexedOffset(ptrVal->getType(),idxVec))
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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 casts for now, i.e., a no-op.
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// This assertion is not a complete check.
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assert(target.DataLayout.getTypeSize(CE->getType()) ==
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target.DataLayout.getTypeSize(CE->getOperand(0)->getType()));
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S += "(" + valToExprString(CE->getOperand(0), target) + ")";
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break;
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case Instruction::Add:
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S += "(" + valToExprString(CE->getOperand(0), target) + ") + ("
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+ valToExprString(CE->getOperand(1), target) + ")";
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break;
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default:
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assert(0 && "Unsupported operator in ConstantExprToString()");
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break;
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}
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return S;
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}
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// valToExprString - Helper function for ConstantExprToString().
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// Appends result to argument string S.
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//
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std::string valToExprString(const Value* V, const TargetMachine& target) {
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std::string S;
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bool failed = false;
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if (const Constant* CV = dyn_cast<Constant>(V)) { // symbolic or known
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if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV))
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S += std::string(CB == ConstantBool::True ? "1" : "0");
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else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
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S += itostr(CI->getValue());
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else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
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S += utostr(CI->getValue());
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else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV))
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S += ftostr(CFP->getValue());
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else if (isa<ConstantPointerNull>(CV))
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S += "0";
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else if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(CV))
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S += valToExprString(CPR->getValue(), target);
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else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV))
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S += ConstantExprToString(CE, target);
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else
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failed = true;
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} else if (const GlobalValue* GV = dyn_cast<GlobalValue>(V)) {
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S += getID(GV);
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}
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else
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failed = true;
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if (failed) {
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assert(0 && "Cannot convert value to string");
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S += "<illegal-value>";
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}
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return S;
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}
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};
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//===----------------------------------------------------------------------===//
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// SparcFunctionAsmPrinter Code
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//===----------------------------------------------------------------------===//
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struct SparcFunctionAsmPrinter : public FunctionPass, public AsmPrinter {
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inline SparcFunctionAsmPrinter(std::ostream &os, const TargetMachine &t)
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: AsmPrinter(os, t) {}
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const char *getPassName() const {
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return "Output Sparc Assembly for Functions";
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}
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virtual bool doInitialization(Module &M) {
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startModule(M);
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return false;
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}
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virtual bool runOnFunction(Function &F) {
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startFunction(F);
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emitFunction(F);
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endFunction(F);
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return false;
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}
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virtual bool doFinalization(Module &M) {
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endModule();
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return false;
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}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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}
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void emitFunction(const Function &F);
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private :
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void emitBasicBlock(const BasicBlock *BB);
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void emitMachineInst(const MachineInstr *MI);
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unsigned int printOperands(const MachineInstr *MI, unsigned int opNum);
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void printOneOperand(const MachineOperand &Op);
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bool OpIsBranchTargetLabel(const MachineInstr *MI, unsigned int opNum);
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bool OpIsMemoryAddressBase(const MachineInstr *MI, unsigned int opNum);
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unsigned getOperandMask(unsigned Opcode) {
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switch (Opcode) {
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case SUBcc: return 1 << 3; // Remove CC argument
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//case BA: return 1 << 0; // Remove Arg #0, which is always null or xcc
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default: return 0; // By default, don't hack operands...
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}
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}
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};
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inline bool
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SparcFunctionAsmPrinter::OpIsBranchTargetLabel(const MachineInstr *MI,
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unsigned int opNum) {
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switch (MI->getOpCode()) {
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case JMPLCALL:
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case JMPLRET: return (opNum == 0);
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default: return false;
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}
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}
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inline bool
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SparcFunctionAsmPrinter::OpIsMemoryAddressBase(const MachineInstr *MI,
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unsigned int opNum) {
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if (Target.getInstrInfo().isLoad(MI->getOpCode()))
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return (opNum == 0);
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else if (Target.getInstrInfo().isStore(MI->getOpCode()))
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return (opNum == 1);
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else
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return false;
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}
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#define PrintOp1PlusOp2(mop1, mop2) \
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printOneOperand(mop1); \
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toAsm << "+"; \
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printOneOperand(mop2);
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unsigned int
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SparcFunctionAsmPrinter::printOperands(const MachineInstr *MI,
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unsigned int opNum)
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{
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const MachineOperand& mop = MI->getOperand(opNum);
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if (OpIsBranchTargetLabel(MI, opNum))
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{
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PrintOp1PlusOp2(mop, MI->getOperand(opNum+1));
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return 2;
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}
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else if (OpIsMemoryAddressBase(MI, opNum))
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{
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toAsm << "[";
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PrintOp1PlusOp2(mop, MI->getOperand(opNum+1));
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toAsm << "]";
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return 2;
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}
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else
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{
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printOneOperand(mop);
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return 1;
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}
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}
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void
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SparcFunctionAsmPrinter::printOneOperand(const MachineOperand &mop)
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{
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bool needBitsFlag = true;
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if (mop.opHiBits32())
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toAsm << "%lm(";
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else if (mop.opLoBits32())
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toAsm << "%lo(";
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else if (mop.opHiBits64())
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toAsm << "%hh(";
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else if (mop.opLoBits64())
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toAsm << "%hm(";
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else
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needBitsFlag = false;
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switch (mop.getOperandType())
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{
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case MachineOperand::MO_VirtualRegister:
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case MachineOperand::MO_CCRegister:
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case MachineOperand::MO_MachineRegister:
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{
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int RegNum = (int)mop.getAllocatedRegNum();
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// better to print code with NULL registers than to die
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if (RegNum == Target.getRegInfo().getInvalidRegNum()) {
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toAsm << "<NULL VALUE>";
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} else {
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toAsm << "%" << Target.getRegInfo().getUnifiedRegName(RegNum);
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}
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break;
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}
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case MachineOperand::MO_PCRelativeDisp:
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{
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const Value *Val = mop.getVRegValue();
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assert(Val && "\tNULL Value in SparcFunctionAsmPrinter");
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if (const BasicBlock *BB = dyn_cast<const BasicBlock>(Val))
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toAsm << getID(BB);
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else if (const Function *M = dyn_cast<Function>(Val))
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toAsm << getID(M);
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else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(Val))
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toAsm << getID(GV);
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else if (const Constant *CV = dyn_cast<Constant>(Val))
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toAsm << getID(CV);
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else
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assert(0 && "Unrecognized value in SparcFunctionAsmPrinter");
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break;
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}
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case MachineOperand::MO_SignExtendedImmed:
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toAsm << mop.getImmedValue();
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break;
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case MachineOperand::MO_UnextendedImmed:
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toAsm << (uint64_t) mop.getImmedValue();
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break;
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default:
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toAsm << mop; // use dump field
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break;
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}
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if (needBitsFlag)
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toAsm << ")";
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}
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void
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SparcFunctionAsmPrinter::emitMachineInst(const MachineInstr *MI)
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{
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unsigned Opcode = MI->getOpCode();
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if (TargetInstrDescriptors[Opcode].iclass & M_DUMMY_PHI_FLAG)
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return; // IGNORE PHI NODES
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toAsm << "\t" << TargetInstrDescriptors[Opcode].opCodeString << "\t";
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unsigned Mask = getOperandMask(Opcode);
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bool NeedComma = false;
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unsigned N = 1;
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for (unsigned OpNum = 0; OpNum < MI->getNumOperands(); OpNum += N)
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if (! ((1 << OpNum) & Mask)) { // Ignore this operand?
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if (NeedComma) toAsm << ", "; // Handle comma outputing
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NeedComma = true;
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N = printOperands(MI, OpNum);
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}
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else
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N = 1;
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toAsm << "\n";
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}
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void
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SparcFunctionAsmPrinter::emitBasicBlock(const BasicBlock *BB)
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{
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// Emit a label for the basic block
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toAsm << getID(BB) << ":\n";
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// Get the vector of machine instructions corresponding to this bb.
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const MachineCodeForBasicBlock &MIs = MachineCodeForBasicBlock::get(BB);
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MachineCodeForBasicBlock::const_iterator MII = MIs.begin(), MIE = MIs.end();
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// Loop over all of the instructions in the basic block...
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for (; MII != MIE; ++MII)
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emitMachineInst(*MII);
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toAsm << "\n"; // Seperate BB's with newlines
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}
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void
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SparcFunctionAsmPrinter::emitFunction(const Function &F)
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{
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string methName = getID(&F);
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toAsm << "!****** Outputing Function: " << methName << " ******\n";
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enterSection(AsmPrinter::Text);
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toAsm << "\t.align\t4\n\t.global\t" << methName << "\n";
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//toAsm << "\t.type\t" << methName << ",#function\n";
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toAsm << "\t.type\t" << methName << ", 2\n";
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toAsm << methName << ":\n";
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// Output code for all of the basic blocks in the function...
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for (Function::const_iterator I = F.begin(), E = F.end(); I != E; ++I)
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emitBasicBlock(I);
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// Output a .size directive so the debugger knows the extents of the function
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toAsm << ".EndOf_" << methName << ":\n\t.size "
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<< methName << ", .EndOf_"
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<< methName << "-" << methName << "\n";
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// Put some spaces between the functions
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toAsm << "\n\n";
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}
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} // End anonymous namespace
|
|
|
|
Pass *UltraSparc::getFunctionAsmPrinterPass(std::ostream &Out) {
|
|
return new SparcFunctionAsmPrinter(Out, *this);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// SparcFunctionAsmPrinter Code
|
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//===----------------------------------------------------------------------===//
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|
|
namespace {
|
|
|
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class SparcModuleAsmPrinter : public Pass, public AsmPrinter {
|
|
public:
|
|
SparcModuleAsmPrinter(std::ostream &os, TargetMachine &t)
|
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: AsmPrinter(os, t) {}
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const char *getPassName() const { return "Output Sparc Assembly for Module"; }
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|
|
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virtual bool run(Module &M) {
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startModule(M);
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emitGlobalsAndConstants(M);
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endModule();
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|
return false;
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|
}
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|
|
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
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AU.setPreservesAll();
|
|
}
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|
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|
private:
|
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void emitGlobalsAndConstants (const Module &M);
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|
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void printGlobalVariable (const GlobalVariable *GV);
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void PrintZeroBytesToPad (int numBytes);
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void printSingleConstantValue (const Constant* CV);
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void printConstantValueOnly (const Constant* CV, int numPadBytes = 0);
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void printConstant (const Constant* CV, std::string valID = "");
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|
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static void FoldConstants (const Module &M,
|
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hash_set<const Constant*> &moduleConstants);
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};
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|
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// Can we treat the specified array as a string? Only if it is an array of
|
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// ubytes or non-negative sbytes.
|
|
//
|
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static bool isStringCompatible(const ConstantArray *CVA) {
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const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
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if (ETy == Type::UByteTy) return true;
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if (ETy != Type::SByteTy) return false;
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for (unsigned i = 0; i < CVA->getNumOperands(); ++i)
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if (cast<ConstantSInt>(CVA->getOperand(i))->getValue() < 0)
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return false;
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return true;
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}
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|
// toOctal - Convert the low order bits of X into an octal letter
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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 string, only if
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// the predicate isStringCompatible is true.
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//
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static string getAsCString(const ConstantArray *CVA) {
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assert(isStringCompatible(CVA) && "Array is not string compatible!");
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|
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string Result;
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const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
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Result = "\"";
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for (unsigned i = 0; i < CVA->getNumOperands(); ++i) {
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unsigned char C = (ETy == Type::SByteTy) ?
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(unsigned char)cast<ConstantSInt>(CVA->getOperand(i))->getValue() :
|
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(unsigned char)cast<ConstantUInt>(CVA->getOperand(i))->getValue();
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|
|
|
if (C == '"') {
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Result += "\\\"";
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} else if (isprint(C)) {
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|
Result += C;
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} else {
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switch(C) {
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case '\a': Result += "\\a"; break;
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case '\b': Result += "\\b"; break;
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case '\f': Result += "\\f"; break;
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case '\n': Result += "\\n"; break;
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case '\r': Result += "\\r"; break;
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case '\t': Result += "\\t"; break;
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case '\v': Result += "\\v"; break;
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default:
|
|
Result += '\\';
|
|
Result += toOctal(C >> 6);
|
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Result += toOctal(C >> 3);
|
|
Result += toOctal(C >> 0);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
Result += "\"";
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|
|
|
return Result;
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|
}
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|
|
|
inline bool
|
|
ArrayTypeIsString(const ArrayType* arrayType)
|
|
{
|
|
return (arrayType->getElementType() == Type::UByteTy ||
|
|
arrayType->getElementType() == Type::SByteTy);
|
|
}
|
|
|
|
|
|
inline const string
|
|
TypeToDataDirective(const Type* type)
|
|
{
|
|
switch(type->getPrimitiveID())
|
|
{
|
|
case Type::BoolTyID: case Type::UByteTyID: case Type::SByteTyID:
|
|
return ".byte";
|
|
case Type::UShortTyID: case Type::ShortTyID:
|
|
return ".half";
|
|
case Type::UIntTyID: case Type::IntTyID:
|
|
return ".word";
|
|
case Type::ULongTyID: case Type::LongTyID: case Type::PointerTyID:
|
|
return ".xword";
|
|
case Type::FloatTyID:
|
|
return ".word";
|
|
case Type::DoubleTyID:
|
|
return ".xword";
|
|
case Type::ArrayTyID:
|
|
if (ArrayTypeIsString((ArrayType*) type))
|
|
return ".ascii";
|
|
else
|
|
return "<InvaliDataTypeForPrinting>";
|
|
default:
|
|
return "<InvaliDataTypeForPrinting>";
|
|
}
|
|
}
|
|
|
|
// Get the size of the type
|
|
//
|
|
inline unsigned int
|
|
TypeToSize(const Type* type, const TargetMachine& target)
|
|
{
|
|
return target.findOptimalStorageSize(type);
|
|
}
|
|
|
|
// Get the size of the constant for the given target.
|
|
// If this is an unsized array, return 0.
|
|
//
|
|
inline unsigned int
|
|
ConstantToSize(const Constant* CV, const TargetMachine& target)
|
|
{
|
|
if (const ConstantArray* CVA = dyn_cast<ConstantArray>(CV))
|
|
{
|
|
const ArrayType *aty = cast<ArrayType>(CVA->getType());
|
|
if (ArrayTypeIsString(aty))
|
|
return 1 + CVA->getNumOperands();
|
|
}
|
|
|
|
return TypeToSize(CV->getType(), target);
|
|
}
|
|
|
|
// Align data larger than one L1 cache line on L1 cache line boundaries.
|
|
// Align all smaller data on the next higher 2^x boundary (4, 8, ...).
|
|
//
|
|
inline unsigned int
|
|
SizeToAlignment(unsigned int size, const TargetMachine& target)
|
|
{
|
|
unsigned short cacheLineSize = target.getCacheInfo().getCacheLineSize(1);
|
|
if (size > (unsigned) cacheLineSize / 2)
|
|
return cacheLineSize;
|
|
else
|
|
for (unsigned sz=1; /*no condition*/; sz *= 2)
|
|
if (sz >= size)
|
|
return sz;
|
|
}
|
|
|
|
// Get the size of the type and then use SizeToAlignment.
|
|
//
|
|
inline unsigned int
|
|
TypeToAlignment(const Type* type, const TargetMachine& target)
|
|
{
|
|
return SizeToAlignment(TypeToSize(type, target), target);
|
|
}
|
|
|
|
// Get the size of the constant and then use SizeToAlignment.
|
|
// Handles strings as a special case;
|
|
inline unsigned int
|
|
ConstantToAlignment(const Constant* CV, const TargetMachine& target)
|
|
{
|
|
if (const ConstantArray* CVA = dyn_cast<ConstantArray>(CV))
|
|
if (ArrayTypeIsString(cast<ArrayType>(CVA->getType())))
|
|
return SizeToAlignment(1 + CVA->getNumOperands(), target);
|
|
|
|
return TypeToAlignment(CV->getType(), target);
|
|
}
|
|
|
|
|
|
// Print a single constant value.
|
|
void
|
|
SparcModuleAsmPrinter::printSingleConstantValue(const Constant* CV)
|
|
{
|
|
assert(CV->getType() != Type::VoidTy &&
|
|
CV->getType() != Type::TypeTy &&
|
|
CV->getType() != Type::LabelTy &&
|
|
"Unexpected type for Constant");
|
|
|
|
assert((!isa<ConstantArray>(CV) && ! isa<ConstantStruct>(CV))
|
|
&& "Aggregate types should be handled outside this function");
|
|
|
|
toAsm << "\t" << TypeToDataDirective(CV->getType()) << "\t";
|
|
|
|
if (CV->getType()->isPrimitiveType())
|
|
{
|
|
if (CV->getType()->isFloatingPoint()) {
|
|
// FP Constants are printed as integer constants to avoid losing
|
|
// precision...
|
|
double Val = cast<ConstantFP>(CV)->getValue();
|
|
if (CV->getType() == Type::FloatTy) {
|
|
float FVal = (float)Val;
|
|
char *ProxyPtr = (char*)&FVal; // Abide by C TBAA rules
|
|
toAsm << *(unsigned int*)ProxyPtr;
|
|
} else if (CV->getType() == Type::DoubleTy) {
|
|
char *ProxyPtr = (char*)&Val; // Abide by C TBAA rules
|
|
toAsm << *(uint64_t*)ProxyPtr;
|
|
} else {
|
|
assert(0 && "Unknown floating point type!");
|
|
}
|
|
|
|
toAsm << "\t! " << CV->getType()->getDescription()
|
|
<< " value: " << Val << "\n";
|
|
} else {
|
|
WriteAsOperand(toAsm, CV, false, false) << "\n";
|
|
}
|
|
}
|
|
else if (const ConstantPointerRef* CPR = dyn_cast<ConstantPointerRef>(CV))
|
|
{ // This is a constant address for a global variable or method.
|
|
// Use the name of the variable or method as the address value.
|
|
toAsm << getID(CPR->getValue()) << "\n";
|
|
}
|
|
else if (isa<ConstantPointerNull>(CV))
|
|
{ // Null pointer value
|
|
toAsm << "0\n";
|
|
}
|
|
else if (const ConstantExpr* CE = dyn_cast<ConstantExpr>(CV))
|
|
{ // Constant expression built from operators, constants, and symbolic addrs
|
|
toAsm << ConstantExprToString(CE, Target) << "\n";
|
|
}
|
|
else
|
|
{
|
|
assert(0 && "Unknown elementary type for constant");
|
|
}
|
|
}
|
|
|
|
void
|
|
SparcModuleAsmPrinter::PrintZeroBytesToPad(int numBytes)
|
|
{
|
|
for ( ; numBytes >= 8; numBytes -= 8)
|
|
printSingleConstantValue(Constant::getNullValue(Type::ULongTy));
|
|
|
|
if (numBytes >= 4)
|
|
{
|
|
printSingleConstantValue(Constant::getNullValue(Type::UIntTy));
|
|
numBytes -= 4;
|
|
}
|
|
|
|
while (numBytes--)
|
|
printSingleConstantValue(Constant::getNullValue(Type::UByteTy));
|
|
}
|
|
|
|
// Print a constant value or values (it may be an aggregate).
|
|
// Uses printSingleConstantValue() to print each individual value.
|
|
void
|
|
SparcModuleAsmPrinter::printConstantValueOnly(const Constant* CV,
|
|
int numPadBytes /* = 0*/)
|
|
{
|
|
const ConstantArray *CVA = dyn_cast<ConstantArray>(CV);
|
|
|
|
if (numPadBytes)
|
|
PrintZeroBytesToPad(numPadBytes);
|
|
|
|
if (CVA && isStringCompatible(CVA))
|
|
{ // print the string alone and return
|
|
toAsm << "\t" << ".ascii" << "\t" << getAsCString(CVA) << "\n";
|
|
}
|
|
else if (CVA)
|
|
{ // Not a string. Print the values in successive locations
|
|
const std::vector<Use> &constValues = CVA->getValues();
|
|
for (unsigned i=0; i < constValues.size(); i++)
|
|
printConstantValueOnly(cast<Constant>(constValues[i].get()));
|
|
}
|
|
else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV))
|
|
{ // Print the fields in successive locations. Pad to align if needed!
|
|
const StructLayout *cvsLayout =
|
|
Target.DataLayout.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 = Target.DataLayout.getTypeSize(field->getType());
|
|
int padSize = ((i == N-1? cvsLayout->StructSize
|
|
: cvsLayout->MemberOffsets[i+1])
|
|
- cvsLayout->MemberOffsets[i]) - fieldSize;
|
|
sizeSoFar += (fieldSize + padSize);
|
|
|
|
// Now print the actual field value
|
|
printConstantValueOnly(field, padSize);
|
|
}
|
|
assert(sizeSoFar == cvsLayout->StructSize &&
|
|
"Layout of constant struct may be incorrect!");
|
|
}
|
|
else
|
|
printSingleConstantValue(CV);
|
|
}
|
|
|
|
// Print a constant (which may be an aggregate) prefixed by all the
|
|
// appropriate directives. Uses printConstantValueOnly() to print the
|
|
// value or values.
|
|
void
|
|
SparcModuleAsmPrinter::printConstant(const Constant* CV, string valID)
|
|
{
|
|
if (valID.length() == 0)
|
|
valID = getID(CV);
|
|
|
|
toAsm << "\t.align\t" << ConstantToAlignment(CV, Target) << "\n";
|
|
|
|
// Print .size and .type only if it is not a string.
|
|
const ConstantArray *CVA = dyn_cast<ConstantArray>(CV);
|
|
if (CVA && isStringCompatible(CVA))
|
|
{ // print it as a string and return
|
|
toAsm << valID << ":\n";
|
|
toAsm << "\t" << ".ascii" << "\t" << getAsCString(CVA) << "\n";
|
|
return;
|
|
}
|
|
|
|
toAsm << "\t.type" << "\t" << valID << ",#object\n";
|
|
|
|
unsigned int constSize = ConstantToSize(CV, Target);
|
|
if (constSize)
|
|
toAsm << "\t.size" << "\t" << valID << "," << constSize << "\n";
|
|
|
|
toAsm << valID << ":\n";
|
|
|
|
printConstantValueOnly(CV);
|
|
}
|
|
|
|
|
|
void SparcModuleAsmPrinter::FoldConstants(const Module &M,
|
|
hash_set<const Constant*> &MC) {
|
|
for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
|
|
if (!I->isExternal()) {
|
|
const hash_set<const Constant*> &pool =
|
|
MachineCodeForMethod::get(I).getConstantPoolValues();
|
|
MC.insert(pool.begin(), pool.end());
|
|
}
|
|
}
|
|
|
|
void SparcModuleAsmPrinter::printGlobalVariable(const GlobalVariable* GV)
|
|
{
|
|
if (GV->hasExternalLinkage())
|
|
toAsm << "\t.global\t" << getID(GV) << "\n";
|
|
|
|
if (GV->hasInitializer() && ! GV->getInitializer()->isNullValue())
|
|
printConstant(GV->getInitializer(), getID(GV));
|
|
else {
|
|
toAsm << "\t.align\t" << TypeToAlignment(GV->getType()->getElementType(),
|
|
Target) << "\n";
|
|
toAsm << "\t.type\t" << getID(GV) << ",#object\n";
|
|
toAsm << "\t.reserve\t" << getID(GV) << ","
|
|
<< TypeToSize(GV->getType()->getElementType(), Target)
|
|
<< "\n";
|
|
}
|
|
}
|
|
|
|
|
|
void SparcModuleAsmPrinter::emitGlobalsAndConstants(const Module &M) {
|
|
// First, get the constants there were marked by the code generator for
|
|
// inclusion in the assembly code data area and fold them all into a
|
|
// single constant pool since there may be lots of duplicates. Also,
|
|
// lets force these constants into the slot table so that we can get
|
|
// unique names for unnamed constants also.
|
|
//
|
|
hash_set<const Constant*> moduleConstants;
|
|
FoldConstants(M, moduleConstants);
|
|
|
|
// Output constants spilled to memory
|
|
enterSection(AsmPrinter::ReadOnlyData);
|
|
for (hash_set<const Constant*>::const_iterator I = moduleConstants.begin(),
|
|
E = moduleConstants.end(); I != E; ++I)
|
|
printConstant(*I);
|
|
|
|
// Output global variables...
|
|
for (Module::const_giterator GI = M.gbegin(), GE = M.gend(); GI != GE; ++GI)
|
|
if (! GI->isExternal()) {
|
|
assert(GI->hasInitializer());
|
|
if (GI->isConstant())
|
|
enterSection(AsmPrinter::ReadOnlyData); // read-only, initialized data
|
|
else if (GI->getInitializer()->isNullValue())
|
|
enterSection(AsmPrinter::ZeroInitRWData); // read-write zero data
|
|
else
|
|
enterSection(AsmPrinter::InitRWData); // read-write non-zero data
|
|
|
|
printGlobalVariable(GI);
|
|
}
|
|
|
|
toAsm << "\n";
|
|
}
|
|
|
|
} // End anonymous namespace
|
|
|
|
Pass *UltraSparc::getModuleAsmPrinterPass(std::ostream &Out) {
|
|
return new SparcModuleAsmPrinter(Out, *this);
|
|
}
|