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b576c94c15
Header files will be on the way. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9298 91177308-0d34-0410-b5e6-96231b3b80d8
973 lines
30 KiB
C++
973 lines
30 KiB
C++
//===-- EmitAssembly.cpp - Emit Sparc Specific .s File ---------------------==//
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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 implements all of the stuff necessary 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 "llvm/CodeGen/MachineInstr.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineFunctionInfo.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 "Support/Statistic.h"
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#include "SparcInternals.h"
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#include <string>
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namespace {
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Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
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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 necessary 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 necessary
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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 std::string &S) {
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std::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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//
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if (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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std::string getID(const Value *V, const char *Prefix, const char *FPrefix = 0) {
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std::string Result = FPrefix ? FPrefix : ""; // "Forced prefix"
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Result += V->hasName() ? V->getName() : std::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.getSlot(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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// Replace or prefix problem characters in the name
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Result = getValidSymbolName(Result);
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}
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return Result;
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}
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// getID Wrappers - Ensure consistent usage...
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std::string getID(const Function *F) {
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return getID(F, "LLVMFunction_");
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}
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std::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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std::string getID(const GlobalVariable *GV) {
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return getID(GV, "LLVMGlobal_");
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}
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std::string getID(const Constant *CV) {
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return getID(CV, "LLVMConst_", ".C_");
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}
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std::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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// Combines expressions
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inline std::string ConstantArithExprToString(const ConstantExpr* CE,
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const TargetMachine &TM,
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const std::string &op) {
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return "(" + valToExprString(CE->getOperand(0), TM) + op
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+ valToExprString(CE->getOperand(1), TM) + ")";
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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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const TargetData &TD = target.getTargetData();
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S += "(" + valToExprString(ptrVal, target) + ") + ("
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+ utostr(TD.getIndexedOffset(ptrVal->getType(),idxVec)) + ")";
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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.getTargetData().getTypeSize(CE->getType()) ==
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target.getTargetData().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 += ConstantArithExprToString(CE, target, ") + (");
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break;
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case Instruction::Sub:
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S += ConstantArithExprToString(CE, target, ") - (");
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break;
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case Instruction::Mul:
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S += ConstantArithExprToString(CE, target, ") * (");
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break;
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case Instruction::Div:
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S += ConstantArithExprToString(CE, target, ") / (");
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break;
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case Instruction::Rem:
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S += ConstantArithExprToString(CE, target, ") % (");
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break;
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case Instruction::And:
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// Logical && for booleans; bitwise & otherwise
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S += ConstantArithExprToString(CE, target,
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((CE->getType() == Type::BoolTy)? ") && (" : ") & ("));
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break;
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case Instruction::Or:
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// Logical || for booleans; bitwise | otherwise
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S += ConstantArithExprToString(CE, target,
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((CE->getType() == Type::BoolTy)? ") || (" : ") | ("));
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break;
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case Instruction::Xor:
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// Bitwise ^ for all types
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S += ConstantArithExprToString(CE, 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 MachineBasicBlock &MBB);
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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, MachineOpCode opCode);
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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 V9::SUBccr:
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case V9::SUBcci: 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 V9::JMPLCALLr:
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case V9::JMPLCALLi:
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case V9::JMPLRETr:
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case V9::JMPLRETi:
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return (opNum == 0);
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default:
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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, opCode) \
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printOneOperand(mop1, opCode); \
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toAsm << "+"; \
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printOneOperand(mop2, opCode);
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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), MI->getOpCode());
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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), MI->getOpCode());
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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, MI->getOpCode());
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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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MachineOpCode opCode)
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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.getType())
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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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if (regNum == Target.getRegInfo().getInvalidRegNum()) {
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// better to print code with NULL registers than to die
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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<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 (Target.getInstrInfo().isDummyPhiInstr(Opcode))
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return; // IGNORE PHI NODES
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toAsm << "\t" << Target.getInstrInfo().getName(Opcode) << "\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 outputting
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NeedComma = true;
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N = printOperands(MI, OpNum);
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} else
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N = 1;
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toAsm << "\n";
|
|
++EmittedInsts;
|
|
}
|
|
|
|
void
|
|
SparcFunctionAsmPrinter::emitBasicBlock(const MachineBasicBlock &MBB)
|
|
{
|
|
// Emit a label for the basic block
|
|
toAsm << getID(MBB.getBasicBlock()) << ":\n";
|
|
|
|
// Loop over all of the instructions in the basic block...
|
|
for (MachineBasicBlock::const_iterator MII = MBB.begin(), MIE = MBB.end();
|
|
MII != MIE; ++MII)
|
|
emitMachineInst(*MII);
|
|
toAsm << "\n"; // Separate BB's with newlines
|
|
}
|
|
|
|
void
|
|
SparcFunctionAsmPrinter::emitFunction(const Function &F)
|
|
{
|
|
std::string methName = getID(&F);
|
|
toAsm << "!****** Outputing Function: " << methName << " ******\n";
|
|
enterSection(AsmPrinter::Text);
|
|
toAsm << "\t.align\t4\n\t.global\t" << methName << "\n";
|
|
//toAsm << "\t.type\t" << methName << ",#function\n";
|
|
toAsm << "\t.type\t" << methName << ", 2\n";
|
|
toAsm << methName << ":\n";
|
|
|
|
// Output code for all of the basic blocks in the function...
|
|
MachineFunction &MF = MachineFunction::get(&F);
|
|
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end(); I != E;++I)
|
|
emitBasicBlock(*I);
|
|
|
|
// Output a .size directive so the debugger knows the extents of the function
|
|
toAsm << ".EndOf_" << methName << ":\n\t.size "
|
|
<< methName << ", .EndOf_"
|
|
<< methName << "-" << methName << "\n";
|
|
|
|
// Put some spaces between the functions
|
|
toAsm << "\n\n";
|
|
}
|
|
|
|
} // End anonymous namespace
|
|
|
|
Pass *UltraSparc::getFunctionAsmPrinterPass(std::ostream &Out) {
|
|
return new SparcFunctionAsmPrinter(Out, *this);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// SparcFunctionAsmPrinter Code
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
namespace {
|
|
|
|
class SparcModuleAsmPrinter : public Pass, public AsmPrinter {
|
|
public:
|
|
SparcModuleAsmPrinter(std::ostream &os, TargetMachine &t)
|
|
: AsmPrinter(os, t) {}
|
|
|
|
const char *getPassName() const { return "Output Sparc Assembly for Module"; }
|
|
|
|
virtual bool run(Module &M) {
|
|
startModule(M);
|
|
emitGlobalsAndConstants(M);
|
|
endModule();
|
|
return false;
|
|
}
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.setPreservesAll();
|
|
}
|
|
|
|
private:
|
|
void emitGlobalsAndConstants (const Module &M);
|
|
|
|
void printGlobalVariable (const GlobalVariable *GV);
|
|
void PrintZeroBytesToPad (int numBytes);
|
|
void printSingleConstantValue (const Constant* CV);
|
|
void printConstantValueOnly (const Constant* CV, int numPadBytesAfter = 0);
|
|
void printConstant (const Constant* CV, std::string valID = "");
|
|
|
|
static void FoldConstants (const Module &M,
|
|
hash_set<const Constant*> &moduleConstants);
|
|
};
|
|
|
|
|
|
// Can we treat the specified array as a string? Only if it is an array of
|
|
// ubytes or non-negative sbytes.
|
|
//
|
|
static bool isStringCompatible(const ConstantArray *CVA) {
|
|
const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
|
|
if (ETy == Type::UByteTy) return true;
|
|
if (ETy != Type::SByteTy) return false;
|
|
|
|
for (unsigned i = 0; i < CVA->getNumOperands(); ++i)
|
|
if (cast<ConstantSInt>(CVA->getOperand(i))->getValue() < 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
// toOctal - Convert the low order bits of X into an octal letter
|
|
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 std::string getAsCString(const ConstantArray *CVA) {
|
|
assert(isStringCompatible(CVA) && "Array is not string compatible!");
|
|
|
|
std::string Result;
|
|
const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
|
|
Result = "\"";
|
|
for (unsigned i = 0; i < CVA->getNumOperands(); ++i) {
|
|
unsigned char C = cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
|
|
|
|
if (C == '"') {
|
|
Result += "\\\"";
|
|
} else if (C == '\\') {
|
|
Result += "\\\\";
|
|
} else if (isprint(C)) {
|
|
Result += C;
|
|
} else {
|
|
Result += '\\'; // print all other chars as octal value
|
|
Result += toOctal(C >> 6);
|
|
Result += toOctal(C >> 3);
|
|
Result += toOctal(C >> 0);
|
|
}
|
|
}
|
|
Result += "\"";
|
|
|
|
return Result;
|
|
}
|
|
|
|
inline bool
|
|
ArrayTypeIsString(const ArrayType* arrayType)
|
|
{
|
|
return (arrayType->getElementType() == Type::UByteTy ||
|
|
arrayType->getElementType() == Type::SByteTy);
|
|
}
|
|
|
|
|
|
inline const std::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 (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.
|
|
assert(isa<GlobalValue>(CPR->getValue()) && "Unexpected non-global");
|
|
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 if (CV->getType()->isPrimitiveType()) // Check primitive types last
|
|
{
|
|
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
|
|
{
|
|
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 numPadBytesAfter /* = 0*/)
|
|
{
|
|
const ConstantArray *CVA = dyn_cast<ConstantArray>(CV);
|
|
|
|
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.getTargetData().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.getTargetData().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);
|
|
|
|
if (numPadBytesAfter)
|
|
PrintZeroBytesToPad(numPadBytesAfter);
|
|
}
|
|
|
|
// 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, std::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 =
|
|
MachineFunction::get(I).getInfo()->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);
|
|
}
|