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Chris Lattner3af3ba82002-05-09 21:31:18 +00001//===-- Writer.cpp - Library for converting LLVM code to C ----------------===//
Misha Brukmand6a29a52005-04-20 16:05:03 +00002//
John Criswellb576c942003-10-20 19:43:21 +00003// The LLVM Compiler Infrastructure
4//
5// This file was developed by the LLVM research group and is distributed under
6// the University of Illinois Open Source License. See LICENSE.TXT for details.
Misha Brukmand6a29a52005-04-20 16:05:03 +00007//
John Criswellb576c942003-10-20 19:43:21 +00008//===----------------------------------------------------------------------===//
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00009//
Chris Lattner897bf0d2004-02-13 06:18:21 +000010// This library converts LLVM code to C code, compilable by GCC and other C
11// compilers.
Chris Lattner16c7bb22002-05-09 02:28:59 +000012//
Chris Lattneredd8ce12003-05-03 03:14:35 +000013//===----------------------------------------------------------------------===//
Chris Lattner84e66652003-05-03 07:11:00 +000014
Chris Lattnerf31182a2004-02-13 23:18:48 +000015#include "CTargetMachine.h"
Chris Lattner0c54d892006-05-23 23:39:48 +000016#include "llvm/CallingConv.h"
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +000017#include "llvm/Constants.h"
Chris Lattner2f5f51a2002-05-09 03:28:37 +000018#include "llvm/DerivedTypes.h"
19#include "llvm/Module.h"
Chris Lattnera9f5e052003-04-22 20:19:52 +000020#include "llvm/Instructions.h"
Chris Lattner0e9f93e2002-08-31 00:29:16 +000021#include "llvm/Pass.h"
Chris Lattner94f4f8e2004-02-13 23:00:29 +000022#include "llvm/PassManager.h"
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +000023#include "llvm/SymbolTable.h"
Chris Lattner18ac3c82003-05-08 18:41:45 +000024#include "llvm/Intrinsics.h"
Jim Laskey580418e2006-03-23 18:08:29 +000025#include "llvm/IntrinsicInst.h"
Chris Lattnerd1cf1b42002-09-20 23:26:33 +000026#include "llvm/Analysis/ConstantsScanner.h"
Chris Lattnercb3ad012004-05-09 20:41:32 +000027#include "llvm/Analysis/FindUsedTypes.h"
28#include "llvm/Analysis/LoopInfo.h"
Chris Lattner30483732004-06-20 07:49:54 +000029#include "llvm/CodeGen/IntrinsicLowering.h"
Chris Lattner94f4f8e2004-02-13 23:00:29 +000030#include "llvm/Transforms/Scalar.h"
Chris Lattnerd36c9702004-07-11 02:48:49 +000031#include "llvm/Target/TargetMachineRegistry.h"
Chris Lattner23e90702003-11-25 20:49:55 +000032#include "llvm/Support/CallSite.h"
Chris Lattnera05e0ec2004-05-09 03:42:48 +000033#include "llvm/Support/CFG.h"
Chris Lattner23e90702003-11-25 20:49:55 +000034#include "llvm/Support/GetElementPtrTypeIterator.h"
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +000035#include "llvm/Support/InstVisitor.h"
Brian Gaeke49a178b2003-07-25 20:21:06 +000036#include "llvm/Support/Mangler.h"
Jim Laskeycb6682f2005-08-17 19:34:49 +000037#include "llvm/Support/MathExtras.h"
Reid Spencer551ccae2004-09-01 22:55:40 +000038#include "llvm/ADT/StringExtras.h"
Chris Lattner67c2d182005-03-18 16:12:37 +000039#include "llvm/ADT/STLExtras.h"
Reid Spencer551ccae2004-09-01 22:55:40 +000040#include "llvm/Support/MathExtras.h"
41#include "llvm/Config/config.h"
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +000042#include <algorithm>
Reid Spencer954da372004-07-04 12:19:56 +000043#include <iostream>
Duraid Madinad2dec7d2005-12-27 10:40:34 +000044#include <ios>
Nick Hildenbrandt98502372002-11-18 20:55:50 +000045#include <sstream>
Chris Lattner897bf0d2004-02-13 06:18:21 +000046using namespace llvm;
Brian Gaeked0fde302003-11-11 22:41:34 +000047
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +000048namespace {
Chris Lattnerd36c9702004-07-11 02:48:49 +000049 // Register the target.
Chris Lattner71d24aa2004-07-11 03:27:42 +000050 RegisterTarget<CTargetMachine> X("c", " C backend");
Chris Lattnerd36c9702004-07-11 02:48:49 +000051
Chris Lattnerf9a05322006-02-13 22:22:42 +000052 /// CBackendNameAllUsedStructsAndMergeFunctions - This pass inserts names for
53 /// any unnamed structure types that are used by the program, and merges
54 /// external functions with the same name.
Chris Lattner68758072004-05-09 06:20:51 +000055 ///
Chris Lattnerf9a05322006-02-13 22:22:42 +000056 class CBackendNameAllUsedStructsAndMergeFunctions : public ModulePass {
Chris Lattner68758072004-05-09 06:20:51 +000057 void getAnalysisUsage(AnalysisUsage &AU) const {
58 AU.addRequired<FindUsedTypes>();
59 }
60
61 virtual const char *getPassName() const {
62 return "C backend type canonicalizer";
63 }
64
Chris Lattnerb12914b2004-09-20 04:48:05 +000065 virtual bool runOnModule(Module &M);
Chris Lattner68758072004-05-09 06:20:51 +000066 };
Misha Brukmand6a29a52005-04-20 16:05:03 +000067
Chris Lattner68758072004-05-09 06:20:51 +000068 /// CWriter - This class is the main chunk of code that converts an LLVM
69 /// module to a C translation unit.
70 class CWriter : public FunctionPass, public InstVisitor<CWriter> {
Misha Brukmand6a29a52005-04-20 16:05:03 +000071 std::ostream &Out;
Chris Lattnerbc641b92006-03-23 05:43:16 +000072 DefaultIntrinsicLowering IL;
Brian Gaeked9fb37a2003-07-24 20:20:44 +000073 Mangler *Mang;
Chris Lattnercb3ad012004-05-09 20:41:32 +000074 LoopInfo *LI;
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +000075 const Module *TheModule;
Chris Lattneredd8ce12003-05-03 03:14:35 +000076 std::map<const Type *, std::string> TypeNames;
Nick Hildenbrandt67aa2e22002-09-14 21:36:24 +000077
Chris Lattneredd8ce12003-05-03 03:14:35 +000078 std::map<const ConstantFP *, unsigned> FPConstantMap;
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +000079 public:
Chris Lattnerbc641b92006-03-23 05:43:16 +000080 CWriter(std::ostream &o) : Out(o) {}
Chris Lattner0e9f93e2002-08-31 00:29:16 +000081
Chris Lattner94f4f8e2004-02-13 23:00:29 +000082 virtual const char *getPassName() const { return "C backend"; }
Chris Lattner0e9f93e2002-08-31 00:29:16 +000083
Chris Lattnercb3ad012004-05-09 20:41:32 +000084 void getAnalysisUsage(AnalysisUsage &AU) const {
85 AU.addRequired<LoopInfo>();
86 AU.setPreservesAll();
87 }
88
Chris Lattner68758072004-05-09 06:20:51 +000089 virtual bool doInitialization(Module &M);
Chris Lattner0e9f93e2002-08-31 00:29:16 +000090
Chris Lattner68758072004-05-09 06:20:51 +000091 bool runOnFunction(Function &F) {
Chris Lattnercb3ad012004-05-09 20:41:32 +000092 LI = &getAnalysis<LoopInfo>();
93
Chris Lattner3150e2d2004-12-05 06:49:44 +000094 // Get rid of intrinsics we can't handle.
95 lowerIntrinsics(F);
96
Chris Lattner68758072004-05-09 06:20:51 +000097 // Output all floating point constants that cannot be printed accurately.
98 printFloatingPointConstants(F);
Chris Lattner3150e2d2004-12-05 06:49:44 +000099
100 // Ensure that no local symbols conflict with global symbols.
101 F.renameLocalSymbols();
102
Chris Lattner68758072004-05-09 06:20:51 +0000103 printFunction(F);
104 FPConstantMap.clear();
105 return false;
106 }
Chris Lattner0e9f93e2002-08-31 00:29:16 +0000107
Chris Lattner68758072004-05-09 06:20:51 +0000108 virtual bool doFinalization(Module &M) {
Chris Lattner0e9f93e2002-08-31 00:29:16 +0000109 // Free memory...
Brian Gaeked9fb37a2003-07-24 20:20:44 +0000110 delete Mang;
Chris Lattner0e9f93e2002-08-31 00:29:16 +0000111 TypeNames.clear();
Chris Lattnercb3ad012004-05-09 20:41:32 +0000112 return false;
Chris Lattner0e9f93e2002-08-31 00:29:16 +0000113 }
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +0000114
Chris Lattneredd8ce12003-05-03 03:14:35 +0000115 std::ostream &printType(std::ostream &Out, const Type *Ty,
116 const std::string &VariableName = "",
Chris Lattner7635ea42003-11-03 01:01:59 +0000117 bool IgnoreName = false);
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +0000118
Chris Lattner0c54d892006-05-23 23:39:48 +0000119 void printStructReturnPointerFunctionType(std::ostream &Out,
120 const PointerType *Ty);
121
Chris Lattnerbb03efd2002-06-25 15:57:03 +0000122 void writeOperand(Value *Operand);
123 void writeOperandInternal(Value *Operand);
Reid Spencer1628cec2006-10-26 06:15:43 +0000124 void writeOperandWithCast(Value* Operand, unsigned Opcode);
125 bool writeInstructionCast(const Instruction &I);
Chris Lattnerb5af06a2002-05-09 03:06:06 +0000126
Chris Lattner4fbf26d2002-05-09 20:53:56 +0000127 private :
Chris Lattnerc2421432004-05-09 04:30:20 +0000128 void lowerIntrinsics(Function &F);
Chris Lattner4ef51372004-02-14 00:31:10 +0000129
Chris Lattner8c3c4bf2002-05-09 15:49:41 +0000130 void printModule(Module *M);
Chris Lattner68758072004-05-09 06:20:51 +0000131 void printModuleTypes(const SymbolTable &ST);
Chris Lattner2c601a72002-09-20 15:05:40 +0000132 void printContainedStructs(const Type *Ty, std::set<const StructType *> &);
Chris Lattner68758072004-05-09 06:20:51 +0000133 void printFloatingPointConstants(Function &F);
Chris Lattner4cda8352002-08-20 16:55:48 +0000134 void printFunctionSignature(const Function *F, bool Prototype);
135
Chris Lattner94f4f8e2004-02-13 23:00:29 +0000136 void printFunction(Function &);
Chris Lattnercb3ad012004-05-09 20:41:32 +0000137 void printBasicBlock(BasicBlock *BB);
138 void printLoop(Loop *L);
Chris Lattnerb5af06a2002-05-09 03:06:06 +0000139
Chris Lattner6d492922002-08-19 21:32:41 +0000140 void printConstant(Constant *CPV);
Reid Spencer1628cec2006-10-26 06:15:43 +0000141 void printConstantWithCast(Constant *CPV, unsigned Opcode);
142 bool printConstExprCast(const ConstantExpr *CE);
Chris Lattner6d492922002-08-19 21:32:41 +0000143 void printConstantArray(ConstantArray *CPA);
Robert Bocchinob78e8382006-01-20 20:43:57 +0000144 void printConstantPacked(ConstantPacked *CP);
Chris Lattner6d492922002-08-19 21:32:41 +0000145
Chris Lattnerd0c668c2002-05-09 21:18:38 +0000146 // isInlinableInst - Attempt to inline instructions into their uses to build
147 // trees as much as possible. To do this, we have to consistently decide
148 // what is acceptable to inline, so that variable declarations don't get
149 // printed and an extra copy of the expr is not emitted.
150 //
Chris Lattnerbb03efd2002-06-25 15:57:03 +0000151 static bool isInlinableInst(const Instruction &I) {
Chris Lattner433e25a2004-05-20 20:25:50 +0000152 // Always inline setcc instructions, even if they are shared by multiple
153 // expressions. GCC generates horrible code if we don't.
154 if (isa<SetCondInst>(I)) return true;
155
Chris Lattnerd0c668c2002-05-09 21:18:38 +0000156 // Must be an expression, must be used exactly once. If it is dead, we
157 // emit it inline where it would go.
Chris Lattnerfd059242003-10-15 16:48:29 +0000158 if (I.getType() == Type::VoidTy || !I.hasOneUse() ||
Misha Brukmand6a29a52005-04-20 16:05:03 +0000159 isa<TerminatorInst>(I) || isa<CallInst>(I) || isa<PHINode>(I) ||
Andrew Lenharth558bc882005-06-18 18:34:52 +0000160 isa<LoadInst>(I) || isa<VAArgInst>(I))
Chris Lattnerd4e8d312003-07-23 20:45:31 +0000161 // Don't inline a load across a store or other bad things!
Chris Lattnerd0c668c2002-05-09 21:18:38 +0000162 return false;
163
164 // Only inline instruction it it's use is in the same BB as the inst.
Chris Lattnerbb03efd2002-06-25 15:57:03 +0000165 return I.getParent() == cast<Instruction>(I.use_back())->getParent();
Chris Lattnerd0c668c2002-05-09 21:18:38 +0000166 }
167
Chris Lattnera8ab89e2003-06-17 04:39:14 +0000168 // isDirectAlloca - Define fixed sized allocas in the entry block as direct
169 // variables which are accessed with the & operator. This causes GCC to
170 // generate significantly better code than to emit alloca calls directly.
171 //
172 static const AllocaInst *isDirectAlloca(const Value *V) {
173 const AllocaInst *AI = dyn_cast<AllocaInst>(V);
174 if (!AI) return false;
175 if (AI->isArrayAllocation())
176 return 0; // FIXME: we can also inline fixed size array allocas!
Chris Lattner02a3be02003-09-20 14:39:18 +0000177 if (AI->getParent() != &AI->getParent()->getParent()->getEntryBlock())
Chris Lattnera8ab89e2003-06-17 04:39:14 +0000178 return 0;
179 return AI;
180 }
181
Chris Lattner4fbf26d2002-05-09 20:53:56 +0000182 // Instruction visitation functions
183 friend class InstVisitor<CWriter>;
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +0000184
Chris Lattnerbb03efd2002-06-25 15:57:03 +0000185 void visitReturnInst(ReturnInst &I);
186 void visitBranchInst(BranchInst &I);
Chris Lattnera9f5e052003-04-22 20:19:52 +0000187 void visitSwitchInst(SwitchInst &I);
Chris Lattnercb3ad012004-05-09 20:41:32 +0000188 void visitInvokeInst(InvokeInst &I) {
189 assert(0 && "Lowerinvoke pass didn't work!");
190 }
191
192 void visitUnwindInst(UnwindInst &I) {
193 assert(0 && "Lowerinvoke pass didn't work!");
194 }
Chris Lattnera9d12c02004-10-16 18:12:13 +0000195 void visitUnreachableInst(UnreachableInst &I);
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +0000196
Chris Lattner84e66652003-05-03 07:11:00 +0000197 void visitPHINode(PHINode &I);
Chris Lattnerbb03efd2002-06-25 15:57:03 +0000198 void visitBinaryOperator(Instruction &I);
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +0000199
Chris Lattnerbb03efd2002-06-25 15:57:03 +0000200 void visitCastInst (CastInst &I);
Chris Lattner9f24a072004-03-12 05:52:14 +0000201 void visitSelectInst(SelectInst &I);
Chris Lattnerbb03efd2002-06-25 15:57:03 +0000202 void visitCallInst (CallInst &I);
203 void visitShiftInst(ShiftInst &I) { visitBinaryOperator(I); }
Chris Lattner4fbf26d2002-05-09 20:53:56 +0000204
Chris Lattnerbb03efd2002-06-25 15:57:03 +0000205 void visitMallocInst(MallocInst &I);
206 void visitAllocaInst(AllocaInst &I);
207 void visitFreeInst (FreeInst &I);
208 void visitLoadInst (LoadInst &I);
209 void visitStoreInst (StoreInst &I);
210 void visitGetElementPtrInst(GetElementPtrInst &I);
Chris Lattner4d45bd02003-10-18 05:57:43 +0000211 void visitVAArgInst (VAArgInst &I);
Chris Lattner2f5f51a2002-05-09 03:28:37 +0000212
Chris Lattnerbb03efd2002-06-25 15:57:03 +0000213 void visitInstruction(Instruction &I) {
Chris Lattnere7f65d3b2002-06-30 16:07:20 +0000214 std::cerr << "C Writer does not know about " << I;
Chris Lattner4fbf26d2002-05-09 20:53:56 +0000215 abort();
216 }
217
218 void outputLValue(Instruction *I) {
Brian Gaeked9fb37a2003-07-24 20:20:44 +0000219 Out << " " << Mang->getValueName(I) << " = ";
Chris Lattner4fbf26d2002-05-09 20:53:56 +0000220 }
Chris Lattnercb3ad012004-05-09 20:41:32 +0000221
222 bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To);
John Criswell57bbfce2004-10-20 14:38:39 +0000223 void printPHICopiesForSuccessor(BasicBlock *CurBlock,
224 BasicBlock *Successor, unsigned Indent);
Chris Lattner4fbf26d2002-05-09 20:53:56 +0000225 void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
226 unsigned Indent);
Chris Lattner23e90702003-11-25 20:49:55 +0000227 void printIndexingExpression(Value *Ptr, gep_type_iterator I,
228 gep_type_iterator E);
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +0000229 };
Chris Lattner4ef51372004-02-14 00:31:10 +0000230}
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +0000231
Chris Lattner68758072004-05-09 06:20:51 +0000232/// This method inserts names for any unnamed structure types that are used by
233/// the program, and removes names from structure types that are not used by the
234/// program.
235///
Chris Lattnerf9a05322006-02-13 22:22:42 +0000236bool CBackendNameAllUsedStructsAndMergeFunctions::runOnModule(Module &M) {
Chris Lattner68758072004-05-09 06:20:51 +0000237 // Get a set of types that are used by the program...
238 std::set<const Type *> UT = getAnalysis<FindUsedTypes>().getTypes();
Misha Brukmand6a29a52005-04-20 16:05:03 +0000239
Chris Lattner68758072004-05-09 06:20:51 +0000240 // Loop over the module symbol table, removing types from UT that are
Chris Lattnerdbf69f12005-03-08 16:19:59 +0000241 // already named, and removing names for types that are not used.
Chris Lattner68758072004-05-09 06:20:51 +0000242 //
243 SymbolTable &MST = M.getSymbolTable();
Reid Spencer9231ac82004-05-25 08:53:40 +0000244 for (SymbolTable::type_iterator TI = MST.type_begin(), TE = MST.type_end();
245 TI != TE; ) {
246 SymbolTable::type_iterator I = TI++;
Chris Lattnerdbf69f12005-03-08 16:19:59 +0000247
248 // If this is not used, remove it from the symbol table.
249 std::set<const Type *>::iterator UTI = UT.find(I->second);
250 if (UTI == UT.end())
251 MST.remove(I);
252 else
253 UT.erase(UTI); // Only keep one name for this type.
Reid Spencer9231ac82004-05-25 08:53:40 +0000254 }
Chris Lattner68758072004-05-09 06:20:51 +0000255
256 // UT now contains types that are not named. Loop over it, naming
257 // structure types.
258 //
259 bool Changed = false;
Chris Lattner9d1af972004-05-28 05:47:27 +0000260 unsigned RenameCounter = 0;
Chris Lattner68758072004-05-09 06:20:51 +0000261 for (std::set<const Type *>::const_iterator I = UT.begin(), E = UT.end();
262 I != E; ++I)
263 if (const StructType *ST = dyn_cast<StructType>(*I)) {
Chris Lattner9d1af972004-05-28 05:47:27 +0000264 while (M.addTypeName("unnamed"+utostr(RenameCounter), ST))
265 ++RenameCounter;
Chris Lattner68758072004-05-09 06:20:51 +0000266 Changed = true;
267 }
Chris Lattnerf9a05322006-02-13 22:22:42 +0000268
269
270 // Loop over all external functions and globals. If we have two with
271 // identical names, merge them.
272 // FIXME: This code should disappear when we don't allow values with the same
273 // names when they have different types!
274 std::map<std::string, GlobalValue*> ExtSymbols;
275 for (Module::iterator I = M.begin(), E = M.end(); I != E;) {
276 Function *GV = I++;
277 if (GV->isExternal() && GV->hasName()) {
278 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
279 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
280 if (!X.second) {
281 // Found a conflict, replace this global with the previous one.
282 GlobalValue *OldGV = X.first->second;
283 GV->replaceAllUsesWith(ConstantExpr::getCast(OldGV, GV->getType()));
284 GV->eraseFromParent();
285 Changed = true;
286 }
287 }
288 }
289 // Do the same for globals.
290 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
291 I != E;) {
292 GlobalVariable *GV = I++;
293 if (GV->isExternal() && GV->hasName()) {
294 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
295 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
296 if (!X.second) {
297 // Found a conflict, replace this global with the previous one.
298 GlobalValue *OldGV = X.first->second;
299 GV->replaceAllUsesWith(ConstantExpr::getCast(OldGV, GV->getType()));
300 GV->eraseFromParent();
301 Changed = true;
302 }
303 }
304 }
305
Chris Lattner68758072004-05-09 06:20:51 +0000306 return Changed;
307}
308
Chris Lattner0c54d892006-05-23 23:39:48 +0000309/// printStructReturnPointerFunctionType - This is like printType for a struct
310/// return type, except, instead of printing the type as void (*)(Struct*, ...)
311/// print it as "Struct (*)(...)", for struct return functions.
312void CWriter::printStructReturnPointerFunctionType(std::ostream &Out,
313 const PointerType *TheTy) {
314 const FunctionType *FTy = cast<FunctionType>(TheTy->getElementType());
315 std::stringstream FunctionInnards;
316 FunctionInnards << " (*) (";
317 bool PrintedType = false;
318
319 FunctionType::param_iterator I = FTy->param_begin(), E = FTy->param_end();
320 const Type *RetTy = cast<PointerType>(I->get())->getElementType();
321 for (++I; I != E; ++I) {
322 if (PrintedType)
323 FunctionInnards << ", ";
324 printType(FunctionInnards, *I, "");
325 PrintedType = true;
326 }
327 if (FTy->isVarArg()) {
328 if (PrintedType)
329 FunctionInnards << ", ...";
330 } else if (!PrintedType) {
331 FunctionInnards << "void";
332 }
333 FunctionInnards << ')';
334 std::string tstr = FunctionInnards.str();
335 printType(Out, RetTy, tstr);
336}
337
Chris Lattner68758072004-05-09 06:20:51 +0000338
Chris Lattner83c57752002-08-19 22:17:53 +0000339// Pass the Type* and the variable name and this prints out the variable
340// declaration.
341//
Chris Lattneredd8ce12003-05-03 03:14:35 +0000342std::ostream &CWriter::printType(std::ostream &Out, const Type *Ty,
343 const std::string &NameSoFar,
Chris Lattner7635ea42003-11-03 01:01:59 +0000344 bool IgnoreName) {
Chris Lattner83c57752002-08-19 22:17:53 +0000345 if (Ty->isPrimitiveType())
Chris Lattnerf70c22b2004-06-17 18:19:28 +0000346 switch (Ty->getTypeID()) {
Chris Lattner83c57752002-08-19 22:17:53 +0000347 case Type::VoidTyID: return Out << "void " << NameSoFar;
348 case Type::BoolTyID: return Out << "bool " << NameSoFar;
349 case Type::UByteTyID: return Out << "unsigned char " << NameSoFar;
350 case Type::SByteTyID: return Out << "signed char " << NameSoFar;
351 case Type::UShortTyID: return Out << "unsigned short " << NameSoFar;
352 case Type::ShortTyID: return Out << "short " << NameSoFar;
353 case Type::UIntTyID: return Out << "unsigned " << NameSoFar;
354 case Type::IntTyID: return Out << "int " << NameSoFar;
355 case Type::ULongTyID: return Out << "unsigned long long " << NameSoFar;
356 case Type::LongTyID: return Out << "signed long long " << NameSoFar;
357 case Type::FloatTyID: return Out << "float " << NameSoFar;
358 case Type::DoubleTyID: return Out << "double " << NameSoFar;
359 default :
Chris Lattner76e2df22004-07-15 02:14:30 +0000360 std::cerr << "Unknown primitive type: " << *Ty << "\n";
Chris Lattner83c57752002-08-19 22:17:53 +0000361 abort();
362 }
Misha Brukmand6a29a52005-04-20 16:05:03 +0000363
Chris Lattner83c57752002-08-19 22:17:53 +0000364 // Check to see if the type is named.
Chris Lattner04b72c82002-10-16 00:08:22 +0000365 if (!IgnoreName || isa<OpaqueType>(Ty)) {
Chris Lattneredd8ce12003-05-03 03:14:35 +0000366 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000367 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
Chris Lattner04b72c82002-10-16 00:08:22 +0000368 }
Chris Lattner83c57752002-08-19 22:17:53 +0000369
Chris Lattnerf70c22b2004-06-17 18:19:28 +0000370 switch (Ty->getTypeID()) {
Chris Lattner83c57752002-08-19 22:17:53 +0000371 case Type::FunctionTyID: {
Chris Lattner0c54d892006-05-23 23:39:48 +0000372 const FunctionType *FTy = cast<FunctionType>(Ty);
Misha Brukmand6a29a52005-04-20 16:05:03 +0000373 std::stringstream FunctionInnards;
Joel Stanley54f60322003-06-25 04:52:09 +0000374 FunctionInnards << " (" << NameSoFar << ") (";
Chris Lattner0c54d892006-05-23 23:39:48 +0000375 for (FunctionType::param_iterator I = FTy->param_begin(),
376 E = FTy->param_end(); I != E; ++I) {
377 if (I != FTy->param_begin())
Joel Stanley54f60322003-06-25 04:52:09 +0000378 FunctionInnards << ", ";
379 printType(FunctionInnards, *I, "");
Chris Lattner83c57752002-08-19 22:17:53 +0000380 }
Chris Lattner0c54d892006-05-23 23:39:48 +0000381 if (FTy->isVarArg()) {
382 if (FTy->getNumParams())
Reid Spencer9231ac82004-05-25 08:53:40 +0000383 FunctionInnards << ", ...";
Chris Lattner0c54d892006-05-23 23:39:48 +0000384 } else if (!FTy->getNumParams()) {
Joel Stanley54f60322003-06-25 04:52:09 +0000385 FunctionInnards << "void";
Chris Lattner83c57752002-08-19 22:17:53 +0000386 }
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000387 FunctionInnards << ')';
Joel Stanley54f60322003-06-25 04:52:09 +0000388 std::string tstr = FunctionInnards.str();
Chris Lattner0c54d892006-05-23 23:39:48 +0000389 printType(Out, FTy->getReturnType(), tstr);
Nick Hildenbrandt98502372002-11-18 20:55:50 +0000390 return Out;
Chris Lattner83c57752002-08-19 22:17:53 +0000391 }
392 case Type::StructTyID: {
393 const StructType *STy = cast<StructType>(Ty);
394 Out << NameSoFar + " {\n";
395 unsigned Idx = 0;
Chris Lattnerd21cd802004-02-09 04:37:31 +0000396 for (StructType::element_iterator I = STy->element_begin(),
397 E = STy->element_end(); I != E; ++I) {
Chris Lattner83c57752002-08-19 22:17:53 +0000398 Out << " ";
Nick Hildenbrandt98502372002-11-18 20:55:50 +0000399 printType(Out, *I, "field" + utostr(Idx++));
Chris Lattner83c57752002-08-19 22:17:53 +0000400 Out << ";\n";
401 }
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000402 return Out << '}';
Misha Brukmand6a29a52005-04-20 16:05:03 +0000403 }
Chris Lattner83c57752002-08-19 22:17:53 +0000404
405 case Type::PointerTyID: {
406 const PointerType *PTy = cast<PointerType>(Ty);
Vikram S. Adve969c4ad2002-08-25 20:00:08 +0000407 std::string ptrName = "*" + NameSoFar;
408
Robert Bocchinob78e8382006-01-20 20:43:57 +0000409 if (isa<ArrayType>(PTy->getElementType()) ||
410 isa<PackedType>(PTy->getElementType()))
Chris Lattner8917d362003-11-03 04:31:54 +0000411 ptrName = "(" + ptrName + ")";
Vikram S. Adve969c4ad2002-08-25 20:00:08 +0000412
Nick Hildenbrandt98502372002-11-18 20:55:50 +0000413 return printType(Out, PTy->getElementType(), ptrName);
Misha Brukman8f9f9a22003-07-21 16:34:35 +0000414 }
Chris Lattner83c57752002-08-19 22:17:53 +0000415
416 case Type::ArrayTyID: {
417 const ArrayType *ATy = cast<ArrayType>(Ty);
418 unsigned NumElements = ATy->getNumElements();
Chris Lattner3e3b6f72004-12-15 23:13:15 +0000419 if (NumElements == 0) NumElements = 1;
Nick Hildenbrandt98502372002-11-18 20:55:50 +0000420 return printType(Out, ATy->getElementType(),
Chris Lattner83c57752002-08-19 22:17:53 +0000421 NameSoFar + "[" + utostr(NumElements) + "]");
422 }
Chris Lattner04b72c82002-10-16 00:08:22 +0000423
Robert Bocchinob78e8382006-01-20 20:43:57 +0000424 case Type::PackedTyID: {
425 const PackedType *PTy = cast<PackedType>(Ty);
426 unsigned NumElements = PTy->getNumElements();
427 if (NumElements == 0) NumElements = 1;
428 return printType(Out, PTy->getElementType(),
429 NameSoFar + "[" + utostr(NumElements) + "]");
430 }
431
Chris Lattner04b72c82002-10-16 00:08:22 +0000432 case Type::OpaqueTyID: {
433 static int Count = 0;
Chris Lattneredd8ce12003-05-03 03:14:35 +0000434 std::string TyName = "struct opaque_" + itostr(Count++);
Chris Lattner04b72c82002-10-16 00:08:22 +0000435 assert(TypeNames.find(Ty) == TypeNames.end());
436 TypeNames[Ty] = TyName;
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000437 return Out << TyName << ' ' << NameSoFar;
Chris Lattner04b72c82002-10-16 00:08:22 +0000438 }
Chris Lattner83c57752002-08-19 22:17:53 +0000439 default:
440 assert(0 && "Unhandled case in getTypeProps!");
441 abort();
442 }
443
444 return Out;
445}
446
Chris Lattner6d492922002-08-19 21:32:41 +0000447void CWriter::printConstantArray(ConstantArray *CPA) {
448
449 // As a special case, print the array as a string if it is an array of
450 // ubytes or an array of sbytes with positive values.
Misha Brukmand6a29a52005-04-20 16:05:03 +0000451 //
Chris Lattner6d492922002-08-19 21:32:41 +0000452 const Type *ETy = CPA->getType()->getElementType();
453 bool isString = (ETy == Type::SByteTy || ETy == Type::UByteTy);
454
455 // Make sure the last character is a null char, as automatically added by C
Chris Lattner02da6c02003-06-16 12:09:09 +0000456 if (isString && (CPA->getNumOperands() == 0 ||
457 !cast<Constant>(*(CPA->op_end()-1))->isNullValue()))
Chris Lattner6d492922002-08-19 21:32:41 +0000458 isString = false;
Misha Brukmand6a29a52005-04-20 16:05:03 +0000459
Chris Lattner6d492922002-08-19 21:32:41 +0000460 if (isString) {
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000461 Out << '\"';
Chris Lattner02da6c02003-06-16 12:09:09 +0000462 // Keep track of whether the last number was a hexadecimal escape
463 bool LastWasHex = false;
464
Chris Lattner6d492922002-08-19 21:32:41 +0000465 // Do not include the last character, which we know is null
466 for (unsigned i = 0, e = CPA->getNumOperands()-1; i != e; ++i) {
Reid Spencerb83eb642006-10-20 07:07:24 +0000467 unsigned char C = cast<ConstantInt>(CPA->getOperand(i))->getZExtValue();
Misha Brukmand6a29a52005-04-20 16:05:03 +0000468
Chris Lattner02da6c02003-06-16 12:09:09 +0000469 // Print it out literally if it is a printable character. The only thing
470 // to be careful about is when the last letter output was a hex escape
471 // code, in which case we have to be careful not to print out hex digits
Chris Lattnerda920902003-06-16 12:21:19 +0000472 // explicitly (the C compiler thinks it is a continuation of the previous
473 // character, sheesh...)
Chris Lattner02da6c02003-06-16 12:09:09 +0000474 //
475 if (isprint(C) && (!LastWasHex || !isxdigit(C))) {
476 LastWasHex = false;
Nick Hildenbrandt088b4722002-11-06 21:40:23 +0000477 if (C == '"' || C == '\\')
478 Out << "\\" << C;
Nick Hildenbrandtc3dd2af2002-09-30 21:11:55 +0000479 else
480 Out << C;
Chris Lattner6d492922002-08-19 21:32:41 +0000481 } else {
Chris Lattner02da6c02003-06-16 12:09:09 +0000482 LastWasHex = false;
Chris Lattner6d492922002-08-19 21:32:41 +0000483 switch (C) {
484 case '\n': Out << "\\n"; break;
485 case '\t': Out << "\\t"; break;
486 case '\r': Out << "\\r"; break;
487 case '\v': Out << "\\v"; break;
488 case '\a': Out << "\\a"; break;
Nick Hildenbrandtc3dd2af2002-09-30 21:11:55 +0000489 case '\"': Out << "\\\""; break;
Misha Brukmand6a29a52005-04-20 16:05:03 +0000490 case '\'': Out << "\\\'"; break;
Chris Lattner6d492922002-08-19 21:32:41 +0000491 default:
492 Out << "\\x";
Chris Lattner02da6c02003-06-16 12:09:09 +0000493 Out << (char)(( C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A'));
494 Out << (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
495 LastWasHex = true;
Chris Lattner6d492922002-08-19 21:32:41 +0000496 break;
497 }
498 }
499 }
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000500 Out << '\"';
Chris Lattner6d492922002-08-19 21:32:41 +0000501 } else {
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000502 Out << '{';
Chris Lattner6d492922002-08-19 21:32:41 +0000503 if (CPA->getNumOperands()) {
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000504 Out << ' ';
Chris Lattner6d492922002-08-19 21:32:41 +0000505 printConstant(cast<Constant>(CPA->getOperand(0)));
506 for (unsigned i = 1, e = CPA->getNumOperands(); i != e; ++i) {
507 Out << ", ";
508 printConstant(cast<Constant>(CPA->getOperand(i)));
509 }
510 }
511 Out << " }";
512 }
513}
514
Robert Bocchinob78e8382006-01-20 20:43:57 +0000515void CWriter::printConstantPacked(ConstantPacked *CP) {
516 Out << '{';
517 if (CP->getNumOperands()) {
518 Out << ' ';
519 printConstant(cast<Constant>(CP->getOperand(0)));
520 for (unsigned i = 1, e = CP->getNumOperands(); i != e; ++i) {
521 Out << ", ";
522 printConstant(cast<Constant>(CP->getOperand(i)));
523 }
524 }
525 Out << " }";
526}
527
Chris Lattnerdd76aca2003-10-05 00:40:51 +0000528// isFPCSafeToPrint - Returns true if we may assume that CFP may be written out
529// textually as a double (rather than as a reference to a stack-allocated
530// variable). We decide this by converting CFP to a string and back into a
531// double, and then checking whether the conversion results in a bit-equal
532// double to the original value of CFP. This depends on us and the target C
533// compiler agreeing on the conversion process (which is pretty likely since we
534// only deal in IEEE FP).
535//
Chris Lattnercb3ad012004-05-09 20:41:32 +0000536static bool isFPCSafeToPrint(const ConstantFP *CFP) {
Chris Lattner4946a8c2003-10-13 17:13:53 +0000537#if HAVE_PRINTF_A
Chris Lattner5ef6ffd2003-10-12 08:12:58 +0000538 char Buffer[100];
539 sprintf(Buffer, "%a", CFP->getValue());
540
541 if (!strncmp(Buffer, "0x", 2) ||
542 !strncmp(Buffer, "-0x", 3) ||
543 !strncmp(Buffer, "+0x", 3))
544 return atof(Buffer) == CFP->getValue();
545 return false;
546#else
Brian Gaekeb471a232003-06-17 23:55:35 +0000547 std::string StrVal = ftostr(CFP->getValue());
Chris Lattner9860e772003-10-12 04:36:29 +0000548
549 while (StrVal[0] == ' ')
550 StrVal.erase(StrVal.begin());
551
Chris Lattnerdd76aca2003-10-05 00:40:51 +0000552 // Check to make sure that the stringized number is not some string like "Inf"
553 // or NaN. Check that the string matches the "[-+]?[0-9]" regex.
Brian Gaekeb471a232003-06-17 23:55:35 +0000554 if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
555 ((StrVal[0] == '-' || StrVal[0] == '+') &&
556 (StrVal[1] >= '0' && StrVal[1] <= '9')))
557 // Reparse stringized version!
Chris Lattnerdd76aca2003-10-05 00:40:51 +0000558 return atof(StrVal.c_str()) == CFP->getValue();
Brian Gaekeb471a232003-06-17 23:55:35 +0000559 return false;
Chris Lattner5ef6ffd2003-10-12 08:12:58 +0000560#endif
Brian Gaekeb471a232003-06-17 23:55:35 +0000561}
Chris Lattner6d492922002-08-19 21:32:41 +0000562
563// printConstant - The LLVM Constant to C Constant converter.
564void CWriter::printConstant(Constant *CPV) {
565 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
566 switch (CE->getOpcode()) {
Chris Lattnerdf35a1c2002-08-19 23:09:46 +0000567 case Instruction::Cast:
568 Out << "((";
Nick Hildenbrandt98502372002-11-18 20:55:50 +0000569 printType(Out, CPV->getType());
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000570 Out << ')';
Chris Lattner84c0d5e2003-05-14 17:50:19 +0000571 printConstant(CE->getOperand(0));
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000572 Out << ')';
Chris Lattnerdf35a1c2002-08-19 23:09:46 +0000573 return;
574
575 case Instruction::GetElementPtr:
Nick Hildenbrandtd2eb3862002-10-03 20:47:24 +0000576 Out << "(&(";
Chris Lattner23e90702003-11-25 20:49:55 +0000577 printIndexingExpression(CE->getOperand(0), gep_type_begin(CPV),
578 gep_type_end(CPV));
Nick Hildenbrandtd2eb3862002-10-03 20:47:24 +0000579 Out << "))";
Chris Lattnerdf35a1c2002-08-19 23:09:46 +0000580 return;
Chris Lattner6683dbf2004-04-01 05:28:26 +0000581 case Instruction::Select:
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000582 Out << '(';
Chris Lattner6683dbf2004-04-01 05:28:26 +0000583 printConstant(CE->getOperand(0));
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000584 Out << '?';
Chris Lattner6683dbf2004-04-01 05:28:26 +0000585 printConstant(CE->getOperand(1));
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000586 Out << ':';
Chris Lattner6683dbf2004-04-01 05:28:26 +0000587 printConstant(CE->getOperand(2));
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000588 Out << ')';
Chris Lattner6683dbf2004-04-01 05:28:26 +0000589 return;
Chris Lattnerdf35a1c2002-08-19 23:09:46 +0000590 case Instruction::Add:
Chris Lattnerdf35a1c2002-08-19 23:09:46 +0000591 case Instruction::Sub:
Chris Lattner29255922003-08-14 19:19:53 +0000592 case Instruction::Mul:
Reid Spencer1628cec2006-10-26 06:15:43 +0000593 case Instruction::SDiv:
594 case Instruction::UDiv:
595 case Instruction::FDiv:
Reid Spencer0a783f72006-11-02 01:53:59 +0000596 case Instruction::URem:
597 case Instruction::SRem:
598 case Instruction::FRem:
Chris Lattnerf376e5e2004-12-29 04:00:09 +0000599 case Instruction::And:
600 case Instruction::Or:
601 case Instruction::Xor:
Chris Lattner29255922003-08-14 19:19:53 +0000602 case Instruction::SetEQ:
603 case Instruction::SetNE:
604 case Instruction::SetLT:
605 case Instruction::SetLE:
606 case Instruction::SetGT:
607 case Instruction::SetGE:
Brian Gaeke0415b6c2003-11-22 05:02:56 +0000608 case Instruction::Shl:
609 case Instruction::Shr:
Reid Spencer72ddc212006-10-26 06:17:40 +0000610 {
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000611 Out << '(';
Reid Spencer1628cec2006-10-26 06:15:43 +0000612 bool NeedsClosingParens = printConstExprCast(CE);
613 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
Chris Lattner29255922003-08-14 19:19:53 +0000614 switch (CE->getOpcode()) {
615 case Instruction::Add: Out << " + "; break;
616 case Instruction::Sub: Out << " - "; break;
617 case Instruction::Mul: Out << " * "; break;
Reid Spencer0a783f72006-11-02 01:53:59 +0000618 case Instruction::URem:
619 case Instruction::SRem:
620 case Instruction::FRem: Out << " % "; break;
Reid Spencer1628cec2006-10-26 06:15:43 +0000621 case Instruction::UDiv:
622 case Instruction::SDiv:
623 case Instruction::FDiv: Out << " / "; break;
Chris Lattnerf376e5e2004-12-29 04:00:09 +0000624 case Instruction::And: Out << " & "; break;
625 case Instruction::Or: Out << " | "; break;
626 case Instruction::Xor: Out << " ^ "; break;
Chris Lattner29255922003-08-14 19:19:53 +0000627 case Instruction::SetEQ: Out << " == "; break;
628 case Instruction::SetNE: Out << " != "; break;
629 case Instruction::SetLT: Out << " < "; break;
630 case Instruction::SetLE: Out << " <= "; break;
631 case Instruction::SetGT: Out << " > "; break;
632 case Instruction::SetGE: Out << " >= "; break;
Brian Gaeke0415b6c2003-11-22 05:02:56 +0000633 case Instruction::Shl: Out << " << "; break;
634 case Instruction::Shr: Out << " >> "; break;
Chris Lattner29255922003-08-14 19:19:53 +0000635 default: assert(0 && "Illegal opcode here!");
636 }
Reid Spencer1628cec2006-10-26 06:15:43 +0000637 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
638 if (NeedsClosingParens)
639 Out << "))";
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000640 Out << ')';
Chris Lattnerdf35a1c2002-08-19 23:09:46 +0000641 return;
Reid Spencer72ddc212006-10-26 06:17:40 +0000642 }
Chris Lattnerdf35a1c2002-08-19 23:09:46 +0000643
Chris Lattner6d492922002-08-19 21:32:41 +0000644 default:
645 std::cerr << "CWriter Error: Unhandled constant expression: "
Chris Lattner76e2df22004-07-15 02:14:30 +0000646 << *CE << "\n";
Chris Lattner6d492922002-08-19 21:32:41 +0000647 abort();
648 }
Chris Lattnera9d12c02004-10-16 18:12:13 +0000649 } else if (isa<UndefValue>(CPV) && CPV->getType()->isFirstClassType()) {
Chris Lattner665825e2004-10-17 17:48:59 +0000650 Out << "((";
651 printType(Out, CPV->getType());
652 Out << ")/*UNDEF*/0)";
Chris Lattnera9d12c02004-10-16 18:12:13 +0000653 return;
Chris Lattner6d492922002-08-19 21:32:41 +0000654 }
655
Chris Lattnerf70c22b2004-06-17 18:19:28 +0000656 switch (CPV->getType()->getTypeID()) {
Chris Lattner6d492922002-08-19 21:32:41 +0000657 case Type::BoolTyID:
Chris Lattner33ce7772006-09-28 23:19:29 +0000658 Out << (cast<ConstantBool>(CPV)->getValue() ? '1' : '0');
659 break;
Chris Lattner6d492922002-08-19 21:32:41 +0000660 case Type::SByteTyID:
661 case Type::ShortTyID:
Reid Spencerb83eb642006-10-20 07:07:24 +0000662 Out << cast<ConstantInt>(CPV)->getSExtValue();
Chris Lattner33ce7772006-09-28 23:19:29 +0000663 break;
Chris Lattner45343ea2003-05-12 15:39:31 +0000664 case Type::IntTyID:
Reid Spencerb83eb642006-10-20 07:07:24 +0000665 if ((int)cast<ConstantInt>(CPV)->getSExtValue() == (int)0x80000000)
Chris Lattner40e7c352004-11-30 21:33:58 +0000666 Out << "((int)0x80000000U)"; // Handle MININT specially to avoid warning
Chris Lattner45343ea2003-05-12 15:39:31 +0000667 else
Reid Spencerb83eb642006-10-20 07:07:24 +0000668 Out << cast<ConstantInt>(CPV)->getSExtValue();
Chris Lattner45343ea2003-05-12 15:39:31 +0000669 break;
670
Chris Lattner6d492922002-08-19 21:32:41 +0000671 case Type::LongTyID:
Reid Spencerb83eb642006-10-20 07:07:24 +0000672 if (cast<ConstantInt>(CPV)->isMinValue())
Chris Lattner40e7c352004-11-30 21:33:58 +0000673 Out << "(/*INT64_MIN*/(-9223372036854775807LL)-1)";
674 else
Reid Spencerb83eb642006-10-20 07:07:24 +0000675 Out << cast<ConstantInt>(CPV)->getSExtValue() << "ll";
Chris Lattner33ce7772006-09-28 23:19:29 +0000676 break;
Chris Lattner6d492922002-08-19 21:32:41 +0000677
678 case Type::UByteTyID:
679 case Type::UShortTyID:
Reid Spencerb83eb642006-10-20 07:07:24 +0000680 Out << cast<ConstantInt>(CPV)->getZExtValue();
Chris Lattner33ce7772006-09-28 23:19:29 +0000681 break;
Chris Lattner6d492922002-08-19 21:32:41 +0000682 case Type::UIntTyID:
Reid Spencerb83eb642006-10-20 07:07:24 +0000683 Out << cast<ConstantInt>(CPV)->getZExtValue() << 'u';
Chris Lattner33ce7772006-09-28 23:19:29 +0000684 break;
Chris Lattner6d492922002-08-19 21:32:41 +0000685 case Type::ULongTyID:
Reid Spencerb83eb642006-10-20 07:07:24 +0000686 Out << cast<ConstantInt>(CPV)->getZExtValue() << "ull";
Chris Lattner33ce7772006-09-28 23:19:29 +0000687 break;
Chris Lattner6d492922002-08-19 21:32:41 +0000688
689 case Type::FloatTyID:
Chris Lattnerd1cf1b42002-09-20 23:26:33 +0000690 case Type::DoubleTyID: {
691 ConstantFP *FPC = cast<ConstantFP>(CPV);
Chris Lattneredd8ce12003-05-03 03:14:35 +0000692 std::map<const ConstantFP*, unsigned>::iterator I = FPConstantMap.find(FPC);
Chris Lattnerd1cf1b42002-09-20 23:26:33 +0000693 if (I != FPConstantMap.end()) {
694 // Because of FP precision problems we must load from a stack allocated
695 // value that holds the value in hex.
696 Out << "(*(" << (FPC->getType() == Type::FloatTy ? "float" : "double")
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000697 << "*)&FPConstant" << I->second << ')';
Chris Lattnerd1cf1b42002-09-20 23:26:33 +0000698 } else {
Brian Gaeke043c0bb2004-07-21 03:15:26 +0000699 if (IsNAN(FPC->getValue())) {
700 // The value is NaN
Misha Brukmand6a29a52005-04-20 16:05:03 +0000701
Brian Gaeke8a702e82004-08-25 19:00:42 +0000702 // The prefix for a quiet NaN is 0x7FF8. For a signalling NaN,
703 // it's 0x7ff4.
704 const unsigned long QuietNaN = 0x7ff8UL;
705 const unsigned long SignalNaN = 0x7ff4UL;
706
707 // We need to grab the first part of the FP #
Brian Gaeke8a702e82004-08-25 19:00:42 +0000708 char Buffer[100];
709
Jim Laskeycb6682f2005-08-17 19:34:49 +0000710 uint64_t ll = DoubleToBits(FPC->getValue());
Reid Spencer2bc320d2006-05-31 22:26:11 +0000711 sprintf(Buffer, "0x%llx", static_cast<long long>(ll));
Brian Gaeke8a702e82004-08-25 19:00:42 +0000712
713 std::string Num(&Buffer[0], &Buffer[6]);
714 unsigned long Val = strtoul(Num.c_str(), 0, 16);
715
Brian Gaeke043c0bb2004-07-21 03:15:26 +0000716 if (FPC->getType() == Type::FloatTy)
Brian Gaeke8a702e82004-08-25 19:00:42 +0000717 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "F(\""
718 << Buffer << "\") /*nan*/ ";
Brian Gaeke043c0bb2004-07-21 03:15:26 +0000719 else
Brian Gaeke8a702e82004-08-25 19:00:42 +0000720 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "(\""
721 << Buffer << "\") /*nan*/ ";
Brian Gaeke043c0bb2004-07-21 03:15:26 +0000722 } else if (IsInf(FPC->getValue())) {
723 // The value is Inf
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000724 if (FPC->getValue() < 0) Out << '-';
Brian Gaeke8a702e82004-08-25 19:00:42 +0000725 Out << "LLVM_INF" << (FPC->getType() == Type::FloatTy ? "F" : "")
726 << " /*inf*/ ";
Brian Gaeke043c0bb2004-07-21 03:15:26 +0000727 } else {
Brian Gaeke07b52b32004-08-25 19:37:26 +0000728 std::string Num;
729#if HAVE_PRINTF_A
730 // Print out the constant as a floating point number.
731 char Buffer[100];
732 sprintf(Buffer, "%a", FPC->getValue());
733 Num = Buffer;
734#else
735 Num = ftostr(FPC->getValue());
736#endif
Brian Gaeke043c0bb2004-07-21 03:15:26 +0000737 Out << Num;
738 }
Chris Lattnerd1cf1b42002-09-20 23:26:33 +0000739 }
740 break;
741 }
Chris Lattner6d492922002-08-19 21:32:41 +0000742
743 case Type::ArrayTyID:
Chris Lattnera9d12c02004-10-16 18:12:13 +0000744 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
Chris Lattnercfb0fd22004-02-15 05:54:27 +0000745 const ArrayType *AT = cast<ArrayType>(CPV->getType());
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000746 Out << '{';
Chris Lattnercfb0fd22004-02-15 05:54:27 +0000747 if (AT->getNumElements()) {
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000748 Out << ' ';
Chris Lattnercfb0fd22004-02-15 05:54:27 +0000749 Constant *CZ = Constant::getNullValue(AT->getElementType());
750 printConstant(CZ);
751 for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
752 Out << ", ";
753 printConstant(CZ);
754 }
755 }
756 Out << " }";
757 } else {
758 printConstantArray(cast<ConstantArray>(CPV));
759 }
Chris Lattner6d492922002-08-19 21:32:41 +0000760 break;
761
Robert Bocchinob78e8382006-01-20 20:43:57 +0000762 case Type::PackedTyID:
763 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
764 const PackedType *AT = cast<PackedType>(CPV->getType());
765 Out << '{';
766 if (AT->getNumElements()) {
767 Out << ' ';
768 Constant *CZ = Constant::getNullValue(AT->getElementType());
769 printConstant(CZ);
770 for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
771 Out << ", ";
772 printConstant(CZ);
773 }
774 }
775 Out << " }";
776 } else {
777 printConstantPacked(cast<ConstantPacked>(CPV));
778 }
779 break;
780
Chris Lattnercfb0fd22004-02-15 05:54:27 +0000781 case Type::StructTyID:
Chris Lattnera9d12c02004-10-16 18:12:13 +0000782 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
Chris Lattnercfb0fd22004-02-15 05:54:27 +0000783 const StructType *ST = cast<StructType>(CPV->getType());
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000784 Out << '{';
Chris Lattnercfb0fd22004-02-15 05:54:27 +0000785 if (ST->getNumElements()) {
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000786 Out << ' ';
Chris Lattnercfb0fd22004-02-15 05:54:27 +0000787 printConstant(Constant::getNullValue(ST->getElementType(0)));
788 for (unsigned i = 1, e = ST->getNumElements(); i != e; ++i) {
789 Out << ", ";
790 printConstant(Constant::getNullValue(ST->getElementType(i)));
791 }
Chris Lattner6d492922002-08-19 21:32:41 +0000792 }
Chris Lattnercfb0fd22004-02-15 05:54:27 +0000793 Out << " }";
794 } else {
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000795 Out << '{';
Chris Lattnercfb0fd22004-02-15 05:54:27 +0000796 if (CPV->getNumOperands()) {
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000797 Out << ' ';
Chris Lattnercfb0fd22004-02-15 05:54:27 +0000798 printConstant(cast<Constant>(CPV->getOperand(0)));
799 for (unsigned i = 1, e = CPV->getNumOperands(); i != e; ++i) {
800 Out << ", ";
801 printConstant(cast<Constant>(CPV->getOperand(i)));
802 }
803 }
804 Out << " }";
Chris Lattner6d492922002-08-19 21:32:41 +0000805 }
Chris Lattner6d492922002-08-19 21:32:41 +0000806 break;
Chris Lattner6d492922002-08-19 21:32:41 +0000807
808 case Type::PointerTyID:
Chris Lattner4fbf26d2002-05-09 20:53:56 +0000809 if (isa<ConstantPointerNull>(CPV)) {
Chris Lattnercf135cb2003-06-02 03:10:53 +0000810 Out << "((";
811 printType(Out, CPV->getType());
812 Out << ")/*NULL*/0)";
Chris Lattner6d492922002-08-19 21:32:41 +0000813 break;
Reid Spencer518310c2004-07-18 00:44:37 +0000814 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(CPV)) {
815 writeOperand(GV);
Chris Lattner6d492922002-08-19 21:32:41 +0000816 break;
817 }
818 // FALL THROUGH
819 default:
Chris Lattner76e2df22004-07-15 02:14:30 +0000820 std::cerr << "Unknown constant type: " << *CPV << "\n";
Chris Lattner6d492922002-08-19 21:32:41 +0000821 abort();
822 }
823}
824
Reid Spencer1628cec2006-10-26 06:15:43 +0000825// Some constant expressions need to be casted back to the original types
826// because their operands were casted to the expected type. This function takes
827// care of detecting that case and printing the cast for the ConstantExpr.
828bool CWriter::printConstExprCast(const ConstantExpr* CE) {
829 bool Result = false;
830 const Type* Ty = CE->getOperand(0)->getType();
831 switch (CE->getOpcode()) {
Reid Spencer0a783f72006-11-02 01:53:59 +0000832 case Instruction::UDiv:
833 case Instruction::URem:
834 Result = Ty->isSigned(); break;
835 case Instruction::SDiv:
836 case Instruction::SRem:
837 Result = Ty->isUnsigned(); break;
Reid Spencer1628cec2006-10-26 06:15:43 +0000838 default: break;
839 }
840 if (Result) {
841 Out << "((";
842 printType(Out, Ty);
843 Out << ")(";
844 }
845 return Result;
846}
847
848// Print a constant assuming that it is the operand for a given Opcode. The
849// opcodes that care about sign need to cast their operands to the expected
850// type before the operation proceeds. This function does the casting.
851void CWriter::printConstantWithCast(Constant* CPV, unsigned Opcode) {
852
853 // Extract the operand's type, we'll need it.
854 const Type* OpTy = CPV->getType();
855
856 // Indicate whether to do the cast or not.
857 bool shouldCast = false;
858
859 // Based on the Opcode for which this Constant is being written, determine
860 // the new type to which the operand should be casted by setting the value
861 // of OpTy. If we change OpTy, also set shouldCast to true.
862 switch (Opcode) {
863 default:
864 // for most instructions, it doesn't matter
865 break;
866 case Instruction::UDiv:
Reid Spencer0a783f72006-11-02 01:53:59 +0000867 case Instruction::URem:
868 // For UDiv/URem get correct type
Reid Spencer1628cec2006-10-26 06:15:43 +0000869 if (OpTy->isSigned()) {
870 OpTy = OpTy->getUnsignedVersion();
871 shouldCast = true;
872 }
873 break;
874 case Instruction::SDiv:
Reid Spencer0a783f72006-11-02 01:53:59 +0000875 case Instruction::SRem:
876 // For SDiv/SRem get correct type
Reid Spencer1628cec2006-10-26 06:15:43 +0000877 if (OpTy->isUnsigned()) {
878 OpTy = OpTy->getSignedVersion();
879 shouldCast = true;
880 }
881 break;
882 }
883
884 // Write out the casted constnat if we should, otherwise just write the
885 // operand.
886 if (shouldCast) {
887 Out << "((";
888 printType(Out, OpTy);
889 Out << ")";
890 printConstant(CPV);
891 Out << ")";
892 } else
893 writeOperand(CPV);
894
895}
896
Chris Lattner6d492922002-08-19 21:32:41 +0000897void CWriter::writeOperandInternal(Value *Operand) {
Chris Lattnerdf35a1c2002-08-19 23:09:46 +0000898 if (Instruction *I = dyn_cast<Instruction>(Operand))
Chris Lattnera8ab89e2003-06-17 04:39:14 +0000899 if (isInlinableInst(*I) && !isDirectAlloca(I)) {
Chris Lattnerdf35a1c2002-08-19 23:09:46 +0000900 // Should we inline this instruction to build a tree?
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000901 Out << '(';
Chris Lattnerdf35a1c2002-08-19 23:09:46 +0000902 visit(*I);
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000903 Out << ')';
Chris Lattnerdf35a1c2002-08-19 23:09:46 +0000904 return;
905 }
Misha Brukmand6a29a52005-04-20 16:05:03 +0000906
Reid Spencer518310c2004-07-18 00:44:37 +0000907 Constant* CPV = dyn_cast<Constant>(Operand);
908 if (CPV && !isa<GlobalValue>(CPV)) {
Misha Brukmand6a29a52005-04-20 16:05:03 +0000909 printConstant(CPV);
Chris Lattner4fbf26d2002-05-09 20:53:56 +0000910 } else {
Brian Gaeked9fb37a2003-07-24 20:20:44 +0000911 Out << Mang->getValueName(Operand);
Chris Lattner4fbf26d2002-05-09 20:53:56 +0000912 }
Chris Lattnerd0c668c2002-05-09 21:18:38 +0000913}
914
Chris Lattnerbb03efd2002-06-25 15:57:03 +0000915void CWriter::writeOperand(Value *Operand) {
Chris Lattnera8ab89e2003-06-17 04:39:14 +0000916 if (isa<GlobalVariable>(Operand) || isDirectAlloca(Operand))
Chris Lattnerd0c668c2002-05-09 21:18:38 +0000917 Out << "(&"; // Global variables are references as their addresses by llvm
918
919 writeOperandInternal(Operand);
Chris Lattner4fbf26d2002-05-09 20:53:56 +0000920
Chris Lattnera8ab89e2003-06-17 04:39:14 +0000921 if (isa<GlobalVariable>(Operand) || isDirectAlloca(Operand))
Misha Brukmanb70aaa62005-02-14 18:52:35 +0000922 Out << ')';
Chris Lattner4fbf26d2002-05-09 20:53:56 +0000923}
924
Reid Spencer1628cec2006-10-26 06:15:43 +0000925// Some instructions need to have their result value casted back to the
926// original types because their operands were casted to the expected type.
927// This function takes care of detecting that case and printing the cast
928// for the Instruction.
929bool CWriter::writeInstructionCast(const Instruction &I) {
930 bool Result = false;
931 const Type* Ty = I.getOperand(0)->getType();
932 switch (I.getOpcode()) {
Reid Spencer0a783f72006-11-02 01:53:59 +0000933 case Instruction::UDiv:
934 case Instruction::URem:
935 Result = Ty->isSigned(); break;
936 case Instruction::SDiv:
937 case Instruction::SRem:
938 Result = Ty->isUnsigned(); break;
Reid Spencer1628cec2006-10-26 06:15:43 +0000939 default: break;
940 }
941 if (Result) {
942 Out << "((";
943 printType(Out, Ty);
944 Out << ")(";
945 }
946 return Result;
947}
948
949// Write the operand with a cast to another type based on the Opcode being used.
950// This will be used in cases where an instruction has specific type
951// requirements (usually signedness) for its operands.
952void CWriter::writeOperandWithCast(Value* Operand, unsigned Opcode) {
953
954 // Extract the operand's type, we'll need it.
955 const Type* OpTy = Operand->getType();
956
957 // Indicate whether to do the cast or not.
958 bool shouldCast = false;
959
960 // Based on the Opcode for which this Operand is being written, determine
961 // the new type to which the operand should be casted by setting the value
962 // of OpTy. If we change OpTy, also set shouldCast to true.
963 switch (Opcode) {
964 default:
965 // for most instructions, it doesn't matter
966 break;
967 case Instruction::UDiv:
Reid Spencer0a783f72006-11-02 01:53:59 +0000968 case Instruction::URem:
Reid Spencer1628cec2006-10-26 06:15:43 +0000969 // For UDiv to have unsigned operands
970 if (OpTy->isSigned()) {
971 OpTy = OpTy->getUnsignedVersion();
972 shouldCast = true;
973 }
974 break;
975 case Instruction::SDiv:
Reid Spencer0a783f72006-11-02 01:53:59 +0000976 case Instruction::SRem:
Reid Spencer1628cec2006-10-26 06:15:43 +0000977 if (OpTy->isUnsigned()) {
978 OpTy = OpTy->getSignedVersion();
979 shouldCast = true;
980 }
981 break;
982 }
983
984 // Write out the casted operand if we should, otherwise just write the
985 // operand.
986 if (shouldCast) {
987 Out << "((";
988 printType(Out, OpTy);
989 Out << ")";
990 writeOperand(Operand);
991 Out << ")";
992 } else
993 writeOperand(Operand);
994
995}
996
Chris Lattner41488192003-06-28 17:15:12 +0000997// generateCompilerSpecificCode - This is where we add conditional compilation
998// directives to cater to specific compilers as need be.
999//
Chris Lattnerc59c1182003-11-16 22:06:14 +00001000static void generateCompilerSpecificCode(std::ostream& Out) {
Chris Lattner9a571ba2006-03-07 22:58:23 +00001001 // Alloca is hard to get, and we don't want to include stdlib.h here.
Chris Lattner41488192003-06-28 17:15:12 +00001002 Out << "/* get a declaration for alloca */\n"
Chris Lattnerd9477602006-06-02 18:54:01 +00001003 << "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
Reid Spencera8411a62005-01-23 04:32:47 +00001004 << "extern void *_alloca(unsigned long);\n"
1005 << "#define alloca(x) _alloca(x)\n"
1006 << "#elif defined(__APPLE__)\n"
Joel Stanleyecd78ac2003-02-12 20:45:00 +00001007 << "extern void *__builtin_alloca(unsigned long);\n"
1008 << "#define alloca(x) __builtin_alloca(x)\n"
Brian Gaekece630052004-12-10 05:44:45 +00001009 << "#elif defined(__sun__)\n"
1010 << "#if defined(__sparcv9)\n"
1011 << "extern void *__builtin_alloca(unsigned long);\n"
1012 << "#else\n"
1013 << "extern void *__builtin_alloca(unsigned int);\n"
1014 << "#endif\n"
1015 << "#define alloca(x) __builtin_alloca(x)\n"
Jeff Cohen3c280bf2006-04-17 17:55:41 +00001016 << "#elif defined(__FreeBSD__) || defined(__OpenBSD__)\n"
Chris Lattner60e66742004-10-06 04:21:52 +00001017 << "#define alloca(x) __builtin_alloca(x)\n"
Jeff Cohend01f65a2005-01-06 04:21:49 +00001018 << "#elif !defined(_MSC_VER)\n"
Joel Stanleyecd78ac2003-02-12 20:45:00 +00001019 << "#include <alloca.h>\n"
1020 << "#endif\n\n";
Chris Lattner41488192003-06-28 17:15:12 +00001021
1022 // We output GCC specific attributes to preserve 'linkonce'ness on globals.
1023 // If we aren't being compiled with GCC, just drop these attributes.
Chris Lattner9bda5f52003-06-28 17:53:05 +00001024 Out << "#ifndef __GNUC__ /* Can only support \"linkonce\" vars with GCC */\n"
Chris Lattner41488192003-06-28 17:15:12 +00001025 << "#define __attribute__(X)\n"
Brian Gaeke27f7a712003-12-11 00:24:36 +00001026 << "#endif\n\n";
1027
1028#if 0
1029 // At some point, we should support "external weak" vs. "weak" linkages.
1030 // On Mac OS X, "external weak" is spelled "__attribute__((weak_import))".
1031 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1032 << "#define __EXTERNAL_WEAK__ __attribute__((weak_import))\n"
1033 << "#elif defined(__GNUC__)\n"
1034 << "#define __EXTERNAL_WEAK__ __attribute__((weak))\n"
1035 << "#else\n"
1036 << "#define __EXTERNAL_WEAK__\n"
1037 << "#endif\n\n";
1038#endif
1039
1040 // For now, turn off the weak linkage attribute on Mac OS X. (See above.)
1041 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1042 << "#define __ATTRIBUTE_WEAK__\n"
1043 << "#elif defined(__GNUC__)\n"
1044 << "#define __ATTRIBUTE_WEAK__ __attribute__((weak))\n"
1045 << "#else\n"
1046 << "#define __ATTRIBUTE_WEAK__\n"
1047 << "#endif\n\n";
Brian Gaeke043c0bb2004-07-21 03:15:26 +00001048
1049 // Define NaN and Inf as GCC builtins if using GCC, as 0 otherwise
1050 // From the GCC documentation:
Misha Brukmand6a29a52005-04-20 16:05:03 +00001051 //
Brian Gaeke043c0bb2004-07-21 03:15:26 +00001052 // double __builtin_nan (const char *str)
1053 //
1054 // This is an implementation of the ISO C99 function nan.
1055 //
1056 // Since ISO C99 defines this function in terms of strtod, which we do
1057 // not implement, a description of the parsing is in order. The string is
1058 // parsed as by strtol; that is, the base is recognized by leading 0 or
1059 // 0x prefixes. The number parsed is placed in the significand such that
1060 // the least significant bit of the number is at the least significant
1061 // bit of the significand. The number is truncated to fit the significand
1062 // field provided. The significand is forced to be a quiet NaN.
1063 //
1064 // This function, if given a string literal, is evaluated early enough
1065 // that it is considered a compile-time constant.
1066 //
1067 // float __builtin_nanf (const char *str)
1068 //
1069 // Similar to __builtin_nan, except the return type is float.
1070 //
1071 // double __builtin_inf (void)
1072 //
1073 // Similar to __builtin_huge_val, except a warning is generated if the
1074 // target floating-point format does not support infinities. This
1075 // function is suitable for implementing the ISO C99 macro INFINITY.
1076 //
1077 // float __builtin_inff (void)
1078 //
1079 // Similar to __builtin_inf, except the return type is float.
1080 Out << "#ifdef __GNUC__\n"
Brian Gaeke8a702e82004-08-25 19:00:42 +00001081 << "#define LLVM_NAN(NanStr) __builtin_nan(NanStr) /* Double */\n"
1082 << "#define LLVM_NANF(NanStr) __builtin_nanf(NanStr) /* Float */\n"
1083 << "#define LLVM_NANS(NanStr) __builtin_nans(NanStr) /* Double */\n"
1084 << "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
1085 << "#define LLVM_INF __builtin_inf() /* Double */\n"
1086 << "#define LLVM_INFF __builtin_inff() /* Float */\n"
Chris Lattnerf9a05322006-02-13 22:22:42 +00001087 << "#define LLVM_PREFETCH(addr,rw,locality) "
1088 "__builtin_prefetch(addr,rw,locality)\n"
Chris Lattner9a571ba2006-03-07 22:58:23 +00001089 << "#define __ATTRIBUTE_CTOR__ __attribute__((constructor))\n"
1090 << "#define __ATTRIBUTE_DTOR__ __attribute__((destructor))\n"
Chris Lattnerdacbe7b2006-07-28 20:58:47 +00001091 << "#define LLVM_ASM __asm__\n"
Brian Gaeke043c0bb2004-07-21 03:15:26 +00001092 << "#else\n"
Brian Gaeke8a702e82004-08-25 19:00:42 +00001093 << "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
1094 << "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
1095 << "#define LLVM_NANS(NanStr) ((double)0.0) /* Double */\n"
1096 << "#define LLVM_NANSF(NanStr) 0.0F /* Float */\n"
1097 << "#define LLVM_INF ((double)0.0) /* Double */\n"
1098 << "#define LLVM_INFF 0.0F /* Float */\n"
Chris Lattner50a8a172005-05-06 06:58:42 +00001099 << "#define LLVM_PREFETCH(addr,rw,locality) /* PREFETCH */\n"
Chris Lattner9a571ba2006-03-07 22:58:23 +00001100 << "#define __ATTRIBUTE_CTOR__\n"
1101 << "#define __ATTRIBUTE_DTOR__\n"
Chris Lattnerdacbe7b2006-07-28 20:58:47 +00001102 << "#define LLVM_ASM(X)\n"
Chris Lattner50a8a172005-05-06 06:58:42 +00001103 << "#endif\n\n";
1104
1105 // Output target-specific code that should be inserted into main.
1106 Out << "#define CODE_FOR_MAIN() /* Any target-specific code for main()*/\n";
1107 // On X86, set the FP control word to 64-bits of precision instead of 80 bits.
1108 Out << "#if defined(__GNUC__) && !defined(__llvm__)\n"
Evan Chenge3db4da2006-06-20 22:11:12 +00001109 << "#if defined(i386) || defined(__i386__) || defined(__i386) || "
1110 << "defined(__x86_64__)\n"
Chris Lattner50a8a172005-05-06 06:58:42 +00001111 << "#undef CODE_FOR_MAIN\n"
1112 << "#define CODE_FOR_MAIN() \\\n"
1113 << " {short F;__asm__ (\"fnstcw %0\" : \"=m\" (*&F)); \\\n"
1114 << " F=(F&~0x300)|0x200;__asm__(\"fldcw %0\"::\"m\"(*&F));}\n"
1115 << "#endif\n#endif\n";
1116
Joel Stanleyecd78ac2003-02-12 20:45:00 +00001117}
1118
Chris Lattner9a571ba2006-03-07 22:58:23 +00001119/// FindStaticTors - Given a static ctor/dtor list, unpack its contents into
1120/// the StaticTors set.
1121static void FindStaticTors(GlobalVariable *GV, std::set<Function*> &StaticTors){
1122 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
1123 if (!InitList) return;
1124
1125 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
1126 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
1127 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
1128
1129 if (CS->getOperand(1)->isNullValue())
1130 return; // Found a null terminator, exit printing.
1131 Constant *FP = CS->getOperand(1);
1132 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
1133 if (CE->getOpcode() == Instruction::Cast)
1134 FP = CE->getOperand(0);
1135 if (Function *F = dyn_cast<Function>(FP))
1136 StaticTors.insert(F);
1137 }
1138}
1139
1140enum SpecialGlobalClass {
1141 NotSpecial = 0,
1142 GlobalCtors, GlobalDtors,
1143 NotPrinted
1144};
1145
1146/// getGlobalVariableClass - If this is a global that is specially recognized
1147/// by LLVM, return a code that indicates how we should handle it.
1148static SpecialGlobalClass getGlobalVariableClass(const GlobalVariable *GV) {
1149 // If this is a global ctors/dtors list, handle it now.
1150 if (GV->hasAppendingLinkage() && GV->use_empty()) {
1151 if (GV->getName() == "llvm.global_ctors")
1152 return GlobalCtors;
1153 else if (GV->getName() == "llvm.global_dtors")
1154 return GlobalDtors;
1155 }
1156
1157 // Otherwise, it it is other metadata, don't print it. This catches things
1158 // like debug information.
1159 if (GV->getSection() == "llvm.metadata")
1160 return NotPrinted;
1161
1162 return NotSpecial;
1163}
1164
1165
Chris Lattner94f4f8e2004-02-13 23:00:29 +00001166bool CWriter::doInitialization(Module &M) {
1167 // Initialize
1168 TheModule = &M;
Chris Lattnerc2421432004-05-09 04:30:20 +00001169
1170 IL.AddPrototypes(M);
Misha Brukmand6a29a52005-04-20 16:05:03 +00001171
Chris Lattner94f4f8e2004-02-13 23:00:29 +00001172 // Ensure that all structure types have names...
Chris Lattner94f4f8e2004-02-13 23:00:29 +00001173 Mang = new Mangler(M);
Chris Lattnerba9c6432005-11-10 21:39:29 +00001174 Mang->markCharUnacceptable('.');
Chris Lattnerc59c1182003-11-16 22:06:14 +00001175
Chris Lattner9a571ba2006-03-07 22:58:23 +00001176 // Keep track of which functions are static ctors/dtors so they can have
1177 // an attribute added to their prototypes.
1178 std::set<Function*> StaticCtors, StaticDtors;
1179 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1180 I != E; ++I) {
1181 switch (getGlobalVariableClass(I)) {
1182 default: break;
1183 case GlobalCtors:
1184 FindStaticTors(I, StaticCtors);
1185 break;
1186 case GlobalDtors:
1187 FindStaticTors(I, StaticDtors);
1188 break;
1189 }
1190 }
1191
Chris Lattner16c7bb22002-05-09 02:28:59 +00001192 // get declaration for alloca
Joel Stanleyecd78ac2003-02-12 20:45:00 +00001193 Out << "/* Provide Declarations */\n";
Chris Lattnerc59c1182003-11-16 22:06:14 +00001194 Out << "#include <stdarg.h>\n"; // Varargs support
1195 Out << "#include <setjmp.h>\n"; // Unwind support
Chris Lattner41488192003-06-28 17:15:12 +00001196 generateCompilerSpecificCode(Out);
Chris Lattnerc59c1182003-11-16 22:06:14 +00001197
Chris Lattnercf135cb2003-06-02 03:10:53 +00001198 // Provide a definition for `bool' if not compiling with a C++ compiler.
1199 Out << "\n"
Vikram S. Adve969c4ad2002-08-25 20:00:08 +00001200 << "#ifndef __cplusplus\ntypedef unsigned char bool;\n#endif\n"
Misha Brukmand6a29a52005-04-20 16:05:03 +00001201
Chris Lattnerd1cf1b42002-09-20 23:26:33 +00001202 << "\n\n/* Support for floating point constants */\n"
1203 << "typedef unsigned long long ConstantDoubleTy;\n"
Chris Lattnereb6f8c72002-11-07 19:43:59 +00001204 << "typedef unsigned int ConstantFloatTy;\n"
Misha Brukmand6a29a52005-04-20 16:05:03 +00001205
Chris Lattnera4d4a852002-08-19 21:48:40 +00001206 << "\n\n/* Global Declarations */\n";
1207
1208 // First output all the declarations for the program, because C requires
1209 // Functions & globals to be declared before they are used.
1210 //
Chris Lattner16c7bb22002-05-09 02:28:59 +00001211
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00001212 // Loop over the symbol table, emitting all named constants...
Chris Lattner68758072004-05-09 06:20:51 +00001213 printModuleTypes(M.getSymbolTable());
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00001214
Chris Lattnera4d4a852002-08-19 21:48:40 +00001215 // Global variable declarations...
Chris Lattnere4d5c442005-03-15 04:54:21 +00001216 if (!M.global_empty()) {
Vikram S. Adve913bfbc2002-09-17 11:50:38 +00001217 Out << "\n/* External Global Variable Declarations */\n";
Chris Lattnerf9a05322006-02-13 22:22:42 +00001218 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1219 I != E; ++I) {
Vikram S. Adve913bfbc2002-09-17 11:50:38 +00001220 if (I->hasExternalLinkage()) {
1221 Out << "extern ";
Brian Gaeked9fb37a2003-07-24 20:20:44 +00001222 printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
Vikram S. Adve913bfbc2002-09-17 11:50:38 +00001223 Out << ";\n";
Anton Korobeynikovb74ed072006-09-14 18:23:27 +00001224 } else if (I->hasDLLImportLinkage()) {
1225 Out << "__declspec(dllimport) ";
1226 printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
1227 Out << ";\n";
1228 }
Chris Lattnerdeed7a52002-05-09 15:18:52 +00001229 }
Chris Lattnerdeed7a52002-05-09 15:18:52 +00001230 }
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00001231
Chris Lattnera4d4a852002-08-19 21:48:40 +00001232 // Function declarations
Chris Lattner9a571ba2006-03-07 22:58:23 +00001233 Out << "\n/* Function Declarations */\n";
Chris Lattner57da2522005-08-23 20:22:50 +00001234 Out << "double fmod(double, double);\n"; // Support for FP rem
1235 Out << "float fmodf(float, float);\n";
1236
Chris Lattner9a571ba2006-03-07 22:58:23 +00001237 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
1238 // Don't print declarations for intrinsic functions.
Reid Spencer2cb46e12006-10-22 09:58:21 +00001239 if (!I->getIntrinsicID() && I->getName() != "setjmp" &&
1240 I->getName() != "longjmp" && I->getName() != "_setjmp") {
Chris Lattner9a571ba2006-03-07 22:58:23 +00001241 printFunctionSignature(I, true);
1242 if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
1243 Out << " __ATTRIBUTE_WEAK__";
1244 if (StaticCtors.count(I))
1245 Out << " __ATTRIBUTE_CTOR__";
1246 if (StaticDtors.count(I))
1247 Out << " __ATTRIBUTE_DTOR__";
Chris Lattnerdacbe7b2006-07-28 20:58:47 +00001248
1249 if (I->hasName() && I->getName()[0] == 1)
1250 Out << " LLVM_ASM(\"" << I->getName().c_str()+1 << "\")";
1251
Chris Lattner9a571ba2006-03-07 22:58:23 +00001252 Out << ";\n";
Chris Lattner4cda8352002-08-20 16:55:48 +00001253 }
Chris Lattnera4d4a852002-08-19 21:48:40 +00001254 }
1255
Joel Stanley54f60322003-06-25 04:52:09 +00001256 // Output the global variable declarations
Chris Lattnere4d5c442005-03-15 04:54:21 +00001257 if (!M.global_empty()) {
Joel Stanley54f60322003-06-25 04:52:09 +00001258 Out << "\n\n/* Global Variable Declarations */\n";
Chris Lattnerf9a05322006-02-13 22:22:42 +00001259 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1260 I != E; ++I)
Nick Hildenbrandt50de36a2002-10-28 19:05:12 +00001261 if (!I->isExternal()) {
Chris Lattner9a571ba2006-03-07 22:58:23 +00001262 // Ignore special globals, such as debug info.
1263 if (getGlobalVariableClass(I))
1264 continue;
1265
Chris Lattnercc16a8e2004-12-03 17:19:10 +00001266 if (I->hasInternalLinkage())
1267 Out << "static ";
1268 else
1269 Out << "extern ";
Brian Gaeked9fb37a2003-07-24 20:20:44 +00001270 printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
Chris Lattner2580d4f2003-11-03 17:32:38 +00001271
1272 if (I->hasLinkOnceLinkage())
1273 Out << " __attribute__((common))";
1274 else if (I->hasWeakLinkage())
Brian Gaeke27f7a712003-12-11 00:24:36 +00001275 Out << " __ATTRIBUTE_WEAK__";
Nick Hildenbrandt50de36a2002-10-28 19:05:12 +00001276 Out << ";\n";
1277 }
1278 }
1279
Vikram S. Adve913bfbc2002-09-17 11:50:38 +00001280 // Output the global variable definitions and contents...
Chris Lattnere4d5c442005-03-15 04:54:21 +00001281 if (!M.global_empty()) {
Vikram S. Adve913bfbc2002-09-17 11:50:38 +00001282 Out << "\n\n/* Global Variable Definitions and Initialization */\n";
Chris Lattnerf9a05322006-02-13 22:22:42 +00001283 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1284 I != E; ++I)
Chris Lattnere8e035b2002-10-16 20:08:47 +00001285 if (!I->isExternal()) {
Chris Lattner9a571ba2006-03-07 22:58:23 +00001286 // Ignore special globals, such as debug info.
1287 if (getGlobalVariableClass(I))
1288 continue;
1289
Chris Lattnere8e035b2002-10-16 20:08:47 +00001290 if (I->hasInternalLinkage())
1291 Out << "static ";
Anton Korobeynikovb74ed072006-09-14 18:23:27 +00001292 else if (I->hasDLLImportLinkage())
1293 Out << "__declspec(dllimport) ";
1294 else if (I->hasDLLExportLinkage())
1295 Out << "__declspec(dllexport) ";
1296
Brian Gaeked9fb37a2003-07-24 20:20:44 +00001297 printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
Chris Lattner76d9f1b2003-06-28 17:08:36 +00001298 if (I->hasLinkOnceLinkage())
1299 Out << " __attribute__((common))";
Chris Lattner72ac148d2003-10-16 18:29:00 +00001300 else if (I->hasWeakLinkage())
Brian Gaeke27f7a712003-12-11 00:24:36 +00001301 Out << " __ATTRIBUTE_WEAK__";
Chris Lattner5ea326a2003-11-03 17:35:00 +00001302
1303 // If the initializer is not null, emit the initializer. If it is null,
1304 // we try to avoid emitting large amounts of zeros. The problem with
1305 // this, however, occurs when the variable has weak linkage. In this
1306 // case, the assembler will complain about the variable being both weak
1307 // and common, so we disable this optimization.
Chris Lattnerf358c5a2004-02-20 05:49:22 +00001308 if (!I->getInitializer()->isNullValue()) {
Chris Lattner940b08d2003-06-06 07:10:24 +00001309 Out << " = " ;
1310 writeOperand(I->getInitializer());
Chris Lattnerf358c5a2004-02-20 05:49:22 +00001311 } else if (I->hasWeakLinkage()) {
1312 // We have to specify an initializer, but it doesn't have to be
1313 // complete. If the value is an aggregate, print out { 0 }, and let
1314 // the compiler figure out the rest of the zeros.
1315 Out << " = " ;
1316 if (isa<StructType>(I->getInitializer()->getType()) ||
Robert Bocchinob78e8382006-01-20 20:43:57 +00001317 isa<ArrayType>(I->getInitializer()->getType()) ||
1318 isa<PackedType>(I->getInitializer()->getType())) {
Chris Lattnerf358c5a2004-02-20 05:49:22 +00001319 Out << "{ 0 }";
1320 } else {
1321 // Just print it out normally.
1322 writeOperand(I->getInitializer());
1323 }
Chris Lattner940b08d2003-06-06 07:10:24 +00001324 }
Chris Lattnere8e035b2002-10-16 20:08:47 +00001325 Out << ";\n";
Chris Lattnera4d4a852002-08-19 21:48:40 +00001326 }
Chris Lattnera4d4a852002-08-19 21:48:40 +00001327 }
1328
Chris Lattner94f4f8e2004-02-13 23:00:29 +00001329 if (!M.empty())
Chris Lattnera4d4a852002-08-19 21:48:40 +00001330 Out << "\n\n/* Function Bodies */\n";
Chris Lattner94f4f8e2004-02-13 23:00:29 +00001331 return false;
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00001332}
1333
Chris Lattner94f4f8e2004-02-13 23:00:29 +00001334
Chris Lattner9860e772003-10-12 04:36:29 +00001335/// Output all floating point constants that cannot be printed accurately...
Chris Lattner68758072004-05-09 06:20:51 +00001336void CWriter::printFloatingPointConstants(Function &F) {
Chris Lattner9860e772003-10-12 04:36:29 +00001337 // Scan the module for floating point constants. If any FP constant is used
1338 // in the function, we want to redirect it here so that we do not depend on
1339 // the precision of the printed form, unless the printed form preserves
1340 // precision.
1341 //
Chris Lattner68758072004-05-09 06:20:51 +00001342 static unsigned FPCounter = 0;
1343 for (constant_iterator I = constant_begin(&F), E = constant_end(&F);
1344 I != E; ++I)
1345 if (const ConstantFP *FPC = dyn_cast<ConstantFP>(*I))
1346 if (!isFPCSafeToPrint(FPC) && // Do not put in FPConstantMap if safe.
1347 !FPConstantMap.count(FPC)) {
1348 double Val = FPC->getValue();
Misha Brukmand6a29a52005-04-20 16:05:03 +00001349
Chris Lattner68758072004-05-09 06:20:51 +00001350 FPConstantMap[FPC] = FPCounter; // Number the FP constants
Misha Brukmand6a29a52005-04-20 16:05:03 +00001351
Chris Lattner68758072004-05-09 06:20:51 +00001352 if (FPC->getType() == Type::DoubleTy) {
Chris Lattner68758072004-05-09 06:20:51 +00001353 Out << "static const ConstantDoubleTy FPConstant" << FPCounter++
Jim Laskeycb6682f2005-08-17 19:34:49 +00001354 << " = 0x" << std::hex << DoubleToBits(Val) << std::dec
Chris Lattner68758072004-05-09 06:20:51 +00001355 << "ULL; /* " << Val << " */\n";
1356 } else if (FPC->getType() == Type::FloatTy) {
Chris Lattner68758072004-05-09 06:20:51 +00001357 Out << "static const ConstantFloatTy FPConstant" << FPCounter++
Jim Laskeycb6682f2005-08-17 19:34:49 +00001358 << " = 0x" << std::hex << FloatToBits(Val) << std::dec
Chris Lattner68758072004-05-09 06:20:51 +00001359 << "U; /* " << Val << " */\n";
1360 } else
1361 assert(0 && "Unknown float type!");
1362 }
Misha Brukmand6a29a52005-04-20 16:05:03 +00001363
Misha Brukmanb70aaa62005-02-14 18:52:35 +00001364 Out << '\n';
Chris Lattner68758072004-05-09 06:20:51 +00001365}
Chris Lattner9860e772003-10-12 04:36:29 +00001366
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00001367
Chris Lattner2db41cd2002-09-20 15:12:13 +00001368/// printSymbolTable - Run through symbol table looking for type names. If a
Robert Bocchinob78e8382006-01-20 20:43:57 +00001369/// type name is found, emit its declaration...
Chris Lattnera4c047e2002-09-20 14:56:54 +00001370///
Chris Lattner68758072004-05-09 06:20:51 +00001371void CWriter::printModuleTypes(const SymbolTable &ST) {
Chris Lattnerb15fde22005-03-06 02:28:23 +00001372 // We are only interested in the type plane of the symbol table.
Reid Spencer9231ac82004-05-25 08:53:40 +00001373 SymbolTable::type_const_iterator I = ST.type_begin();
1374 SymbolTable::type_const_iterator End = ST.type_end();
Chris Lattnerb15fde22005-03-06 02:28:23 +00001375
1376 // If there are no type names, exit early.
1377 if (I == End) return;
Misha Brukmand6a29a52005-04-20 16:05:03 +00001378
Chris Lattner58d04d42002-09-20 15:18:30 +00001379 // Print out forward declarations for structure types before anything else!
1380 Out << "/* Structure forward decls */\n";
1381 for (; I != End; ++I)
Chris Lattner68758072004-05-09 06:20:51 +00001382 if (const Type *STy = dyn_cast<StructType>(I->second)) {
Chris Lattner36c975c2005-11-10 18:53:25 +00001383 std::string Name = "struct l_" + Mang->makeNameProper(I->first);
Chris Lattner68758072004-05-09 06:20:51 +00001384 Out << Name << ";\n";
1385 TypeNames.insert(std::make_pair(STy, Name));
1386 }
Chris Lattner58d04d42002-09-20 15:18:30 +00001387
Misha Brukmanb70aaa62005-02-14 18:52:35 +00001388 Out << '\n';
Chris Lattner58d04d42002-09-20 15:18:30 +00001389
1390 // Now we can print out typedefs...
1391 Out << "/* Typedefs */\n";
Reid Spencer9231ac82004-05-25 08:53:40 +00001392 for (I = ST.type_begin(); I != End; ++I) {
Chris Lattner68758072004-05-09 06:20:51 +00001393 const Type *Ty = cast<Type>(I->second);
Chris Lattner36c975c2005-11-10 18:53:25 +00001394 std::string Name = "l_" + Mang->makeNameProper(I->first);
Chris Lattner68758072004-05-09 06:20:51 +00001395 Out << "typedef ";
1396 printType(Out, Ty, Name);
1397 Out << ";\n";
1398 }
Misha Brukmand6a29a52005-04-20 16:05:03 +00001399
Misha Brukmanb70aaa62005-02-14 18:52:35 +00001400 Out << '\n';
Chris Lattner3ef6dc72002-05-09 14:40:11 +00001401
Chris Lattner2c601a72002-09-20 15:05:40 +00001402 // Keep track of which structures have been printed so far...
1403 std::set<const StructType *> StructPrinted;
1404
Nick Hildenbrandt67aa2e22002-09-14 21:36:24 +00001405 // Loop over all structures then push them into the stack so they are
1406 // printed in the correct order.
Chris Lattner2db41cd2002-09-20 15:12:13 +00001407 //
Chris Lattner58d04d42002-09-20 15:18:30 +00001408 Out << "/* Structure contents */\n";
Reid Spencer9231ac82004-05-25 08:53:40 +00001409 for (I = ST.type_begin(); I != End; ++I)
Chris Lattner2db41cd2002-09-20 15:12:13 +00001410 if (const StructType *STy = dyn_cast<StructType>(I->second))
Chris Lattnerfa395ec2003-11-02 01:29:27 +00001411 // Only print out used types!
Chris Lattner68758072004-05-09 06:20:51 +00001412 printContainedStructs(STy, StructPrinted);
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00001413}
1414
Nick Hildenbrandt67aa2e22002-09-14 21:36:24 +00001415// Push the struct onto the stack and recursively push all structs
1416// this one depends on.
Robert Bocchinob78e8382006-01-20 20:43:57 +00001417//
1418// TODO: Make this work properly with packed types
1419//
Chris Lattner2c601a72002-09-20 15:05:40 +00001420void CWriter::printContainedStructs(const Type *Ty,
1421 std::set<const StructType*> &StructPrinted){
Chris Lattner14d9b202006-01-20 18:57:03 +00001422 // Don't walk through pointers.
1423 if (isa<PointerType>(Ty) || Ty->isPrimitiveType()) return;
1424
1425 // Print all contained types first.
1426 for (Type::subtype_iterator I = Ty->subtype_begin(),
1427 E = Ty->subtype_end(); I != E; ++I)
1428 printContainedStructs(*I, StructPrinted);
1429
Misha Brukmanac25de32003-07-09 17:33:50 +00001430 if (const StructType *STy = dyn_cast<StructType>(Ty)) {
Chris Lattner14d9b202006-01-20 18:57:03 +00001431 // Check to see if we have already printed this struct.
1432 if (StructPrinted.insert(STy).second) {
1433 // Print structure type out.
Misha Brukmand6a29a52005-04-20 16:05:03 +00001434 std::string Name = TypeNames[STy];
Nick Hildenbrandt98502372002-11-18 20:55:50 +00001435 printType(Out, STy, Name, true);
Chris Lattner58d04d42002-09-20 15:18:30 +00001436 Out << ";\n\n";
Nick Hildenbrandt67aa2e22002-09-14 21:36:24 +00001437 }
Nick Hildenbrandt67aa2e22002-09-14 21:36:24 +00001438 }
1439}
1440
Chris Lattner4cda8352002-08-20 16:55:48 +00001441void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
Chris Lattner0c54d892006-05-23 23:39:48 +00001442 /// isCStructReturn - Should this function actually return a struct by-value?
1443 bool isCStructReturn = F->getCallingConv() == CallingConv::CSRet;
1444
Joel Stanley54f60322003-06-25 04:52:09 +00001445 if (F->hasInternalLinkage()) Out << "static ";
Anton Korobeynikovb74ed072006-09-14 18:23:27 +00001446 if (F->hasDLLImportLinkage()) Out << "__declspec(dllimport) ";
1447 if (F->hasDLLExportLinkage()) Out << "__declspec(dllexport) ";
Anton Korobeynikovbcb97702006-09-17 20:25:45 +00001448 switch (F->getCallingConv()) {
1449 case CallingConv::X86_StdCall:
1450 Out << "__stdcall ";
1451 break;
1452 case CallingConv::X86_FastCall:
1453 Out << "__fastcall ";
1454 break;
1455 }
1456
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00001457 // Loop over the arguments, printing them...
Chris Lattner16c7bb22002-05-09 02:28:59 +00001458 const FunctionType *FT = cast<FunctionType>(F->getFunctionType());
Misha Brukmand6a29a52005-04-20 16:05:03 +00001459
1460 std::stringstream FunctionInnards;
1461
Nick Hildenbrandt98502372002-11-18 20:55:50 +00001462 // Print out the name...
Misha Brukmanb70aaa62005-02-14 18:52:35 +00001463 FunctionInnards << Mang->getValueName(F) << '(';
Misha Brukmand6a29a52005-04-20 16:05:03 +00001464
Chris Lattner0c54d892006-05-23 23:39:48 +00001465 bool PrintedArg = false;
Chris Lattner16c7bb22002-05-09 02:28:59 +00001466 if (!F->isExternal()) {
Chris Lattnere4d5c442005-03-15 04:54:21 +00001467 if (!F->arg_empty()) {
Chris Lattner0c54d892006-05-23 23:39:48 +00001468 Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
1469
1470 // If this is a struct-return function, don't print the hidden
1471 // struct-return argument.
1472 if (isCStructReturn) {
1473 assert(I != E && "Invalid struct return function!");
1474 ++I;
1475 }
1476
Chris Lattneredd8ce12003-05-03 03:14:35 +00001477 std::string ArgName;
Chris Lattner0c54d892006-05-23 23:39:48 +00001478 for (; I != E; ++I) {
1479 if (PrintedArg) FunctionInnards << ", ";
Chris Lattner4cda8352002-08-20 16:55:48 +00001480 if (I->hasName() || !Prototype)
Brian Gaeked9fb37a2003-07-24 20:20:44 +00001481 ArgName = Mang->getValueName(I);
Misha Brukmand6a29a52005-04-20 16:05:03 +00001482 else
Chris Lattner4cda8352002-08-20 16:55:48 +00001483 ArgName = "";
Joel Stanley54f60322003-06-25 04:52:09 +00001484 printType(FunctionInnards, I->getType(), ArgName);
Chris Lattner0c54d892006-05-23 23:39:48 +00001485 PrintedArg = true;
Chris Lattnerdeed7a52002-05-09 15:18:52 +00001486 }
1487 }
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00001488 } else {
Chris Lattner0c54d892006-05-23 23:39:48 +00001489 // Loop over the arguments, printing them.
1490 FunctionType::param_iterator I = FT->param_begin(), E = FT->param_end();
1491
1492 // If this is a struct-return function, don't print the hidden
1493 // struct-return argument.
1494 if (isCStructReturn) {
1495 assert(I != E && "Invalid struct return function!");
1496 ++I;
1497 }
1498
1499 for (; I != E; ++I) {
1500 if (PrintedArg) FunctionInnards << ", ";
Joel Stanley54f60322003-06-25 04:52:09 +00001501 printType(FunctionInnards, *I);
Chris Lattner0c54d892006-05-23 23:39:48 +00001502 PrintedArg = true;
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00001503 }
1504 }
1505
Chris Lattner1f8c4a12002-09-20 22:32:30 +00001506 // Finish printing arguments... if this is a vararg function, print the ...,
1507 // unless there are no known types, in which case, we just emit ().
1508 //
Chris Lattner0c54d892006-05-23 23:39:48 +00001509 if (FT->isVarArg() && PrintedArg) {
1510 if (PrintedArg) FunctionInnards << ", ";
Joel Stanley54f60322003-06-25 04:52:09 +00001511 FunctionInnards << "..."; // Output varargs portion of signature!
Chris Lattner0c54d892006-05-23 23:39:48 +00001512 } else if (!FT->isVarArg() && !PrintedArg) {
Chris Lattner4f7e1732003-11-26 00:09:17 +00001513 FunctionInnards << "void"; // ret() -> ret(void) in C.
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00001514 }
Misha Brukmanb70aaa62005-02-14 18:52:35 +00001515 FunctionInnards << ')';
Chris Lattner0c54d892006-05-23 23:39:48 +00001516
1517 // Get the return tpe for the function.
1518 const Type *RetTy;
1519 if (!isCStructReturn)
1520 RetTy = F->getReturnType();
1521 else {
1522 // If this is a struct-return function, print the struct-return type.
1523 RetTy = cast<PointerType>(FT->getParamType(0))->getElementType();
1524 }
1525
1526 // Print out the return type and the signature built above.
1527 printType(Out, RetTy, FunctionInnards.str());
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00001528}
1529
Chris Lattner94f4f8e2004-02-13 23:00:29 +00001530void CWriter::printFunction(Function &F) {
1531 printFunctionSignature(&F, false);
Chris Lattner8c3c4bf2002-05-09 15:49:41 +00001532 Out << " {\n";
Chris Lattner0c54d892006-05-23 23:39:48 +00001533
1534 // If this is a struct return function, handle the result with magic.
1535 if (F.getCallingConv() == CallingConv::CSRet) {
1536 const Type *StructTy =
1537 cast<PointerType>(F.arg_begin()->getType())->getElementType();
1538 Out << " ";
1539 printType(Out, StructTy, "StructReturn");
1540 Out << "; /* Struct return temporary */\n";
Chris Lattner8c3c4bf2002-05-09 15:49:41 +00001541
Chris Lattner0c54d892006-05-23 23:39:48 +00001542 Out << " ";
1543 printType(Out, F.arg_begin()->getType(), Mang->getValueName(F.arg_begin()));
1544 Out << " = &StructReturn;\n";
1545 }
1546
1547 bool PrintedVar = false;
1548
Chris Lattner497e19a2002-05-09 20:39:03 +00001549 // print local variable information for the function
Chris Lattner94f4f8e2004-02-13 23:00:29 +00001550 for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I)
Chris Lattner6ffe5512004-04-27 15:13:33 +00001551 if (const AllocaInst *AI = isDirectAlloca(&*I)) {
Chris Lattnera8ab89e2003-06-17 04:39:14 +00001552 Out << " ";
Brian Gaeked9fb37a2003-07-24 20:20:44 +00001553 printType(Out, AI->getAllocatedType(), Mang->getValueName(AI));
Misha Brukman41ce39c2005-01-31 06:19:57 +00001554 Out << "; /* Address-exposed local */\n";
Chris Lattner0c54d892006-05-23 23:39:48 +00001555 PrintedVar = true;
Chris Lattner6ffe5512004-04-27 15:13:33 +00001556 } else if (I->getType() != Type::VoidTy && !isInlinableInst(*I)) {
Chris Lattner16c7bb22002-05-09 02:28:59 +00001557 Out << " ";
Chris Lattner6ffe5512004-04-27 15:13:33 +00001558 printType(Out, I->getType(), Mang->getValueName(&*I));
Chris Lattner16c7bb22002-05-09 02:28:59 +00001559 Out << ";\n";
Misha Brukmand6a29a52005-04-20 16:05:03 +00001560
Chris Lattner84e66652003-05-03 07:11:00 +00001561 if (isa<PHINode>(*I)) { // Print out PHI node temporaries as well...
1562 Out << " ";
Chris Lattner6ffe5512004-04-27 15:13:33 +00001563 printType(Out, I->getType(),
1564 Mang->getValueName(&*I)+"__PHI_TEMPORARY");
Chris Lattner84e66652003-05-03 07:11:00 +00001565 Out << ";\n";
1566 }
Chris Lattner0c54d892006-05-23 23:39:48 +00001567 PrintedVar = true;
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00001568 }
Chris Lattnerd1cf1b42002-09-20 23:26:33 +00001569
Chris Lattner0c54d892006-05-23 23:39:48 +00001570 if (PrintedVar)
1571 Out << '\n';
Chris Lattnerd1cf1b42002-09-20 23:26:33 +00001572
Chris Lattner395fd592004-12-13 21:52:52 +00001573 if (F.hasExternalLinkage() && F.getName() == "main")
Chris Lattner50a8a172005-05-06 06:58:42 +00001574 Out << " CODE_FOR_MAIN();\n";
Chris Lattner395fd592004-12-13 21:52:52 +00001575
Chris Lattner16c7bb22002-05-09 02:28:59 +00001576 // print the basic blocks
Chris Lattner94f4f8e2004-02-13 23:00:29 +00001577 for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
Chris Lattnercb3ad012004-05-09 20:41:32 +00001578 if (Loop *L = LI->getLoopFor(BB)) {
1579 if (L->getHeader() == BB && L->getParentLoop() == 0)
1580 printLoop(L);
1581 } else {
1582 printBasicBlock(BB);
Chris Lattnerd0c668c2002-05-09 21:18:38 +00001583 }
Chris Lattner8c3c4bf2002-05-09 15:49:41 +00001584 }
Misha Brukmand6a29a52005-04-20 16:05:03 +00001585
Chris Lattner8c3c4bf2002-05-09 15:49:41 +00001586 Out << "}\n\n";
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00001587}
1588
Chris Lattnercb3ad012004-05-09 20:41:32 +00001589void CWriter::printLoop(Loop *L) {
1590 Out << " do { /* Syntactic loop '" << L->getHeader()->getName()
1591 << "' to make GCC happy */\n";
1592 for (unsigned i = 0, e = L->getBlocks().size(); i != e; ++i) {
1593 BasicBlock *BB = L->getBlocks()[i];
1594 Loop *BBLoop = LI->getLoopFor(BB);
1595 if (BBLoop == L)
1596 printBasicBlock(BB);
1597 else if (BB == BBLoop->getHeader() && BBLoop->getParentLoop() == L)
Misha Brukmand6a29a52005-04-20 16:05:03 +00001598 printLoop(BBLoop);
Chris Lattnercb3ad012004-05-09 20:41:32 +00001599 }
1600 Out << " } while (1); /* end of syntactic loop '"
1601 << L->getHeader()->getName() << "' */\n";
1602}
1603
1604void CWriter::printBasicBlock(BasicBlock *BB) {
1605
1606 // Don't print the label for the basic block if there are no uses, or if
1607 // the only terminator use is the predecessor basic block's terminator.
1608 // We have to scan the use list because PHI nodes use basic blocks too but
1609 // do not require a label to be generated.
1610 //
1611 bool NeedsLabel = false;
1612 for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI)
1613 if (isGotoCodeNecessary(*PI, BB)) {
1614 NeedsLabel = true;
1615 break;
1616 }
Misha Brukmand6a29a52005-04-20 16:05:03 +00001617
Chris Lattnercb3ad012004-05-09 20:41:32 +00001618 if (NeedsLabel) Out << Mang->getValueName(BB) << ":\n";
Misha Brukmand6a29a52005-04-20 16:05:03 +00001619
Chris Lattnercb3ad012004-05-09 20:41:32 +00001620 // Output all of the instructions in the basic block...
1621 for (BasicBlock::iterator II = BB->begin(), E = --BB->end(); II != E;
1622 ++II) {
1623 if (!isInlinableInst(*II) && !isDirectAlloca(II)) {
1624 if (II->getType() != Type::VoidTy)
1625 outputLValue(II);
1626 else
1627 Out << " ";
1628 visit(*II);
1629 Out << ";\n";
1630 }
1631 }
Misha Brukmand6a29a52005-04-20 16:05:03 +00001632
Chris Lattnercb3ad012004-05-09 20:41:32 +00001633 // Don't emit prefix or suffix for the terminator...
1634 visit(*BB->getTerminator());
1635}
1636
1637
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001638// Specific Instruction type classes... note that all of the casts are
Misha Brukman5560c9d2003-08-18 14:43:39 +00001639// necessary because we use the instruction classes as opaque types...
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001640//
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001641void CWriter::visitReturnInst(ReturnInst &I) {
Chris Lattner0c54d892006-05-23 23:39:48 +00001642 // If this is a struct return function, return the temporary struct.
1643 if (I.getParent()->getParent()->getCallingConv() == CallingConv::CSRet) {
1644 Out << " return StructReturn;\n";
1645 return;
1646 }
1647
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001648 // Don't output a void return if this is the last basic block in the function
Misha Brukmand6a29a52005-04-20 16:05:03 +00001649 if (I.getNumOperands() == 0 &&
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001650 &*--I.getParent()->getParent()->end() == I.getParent() &&
1651 !I.getParent()->size() == 1) {
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001652 return;
Chris Lattner963b70b2002-05-21 18:05:19 +00001653 }
Chris Lattner44408262002-05-09 03:50:42 +00001654
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001655 Out << " return";
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001656 if (I.getNumOperands()) {
Misha Brukmanb70aaa62005-02-14 18:52:35 +00001657 Out << ' ';
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001658 writeOperand(I.getOperand(0));
Chris Lattner16c7bb22002-05-09 02:28:59 +00001659 }
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001660 Out << ";\n";
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00001661}
1662
Chris Lattnera9f5e052003-04-22 20:19:52 +00001663void CWriter::visitSwitchInst(SwitchInst &SI) {
Chris Lattnera05e0ec2004-05-09 03:42:48 +00001664
Chris Lattnera9f5e052003-04-22 20:19:52 +00001665 Out << " switch (";
1666 writeOperand(SI.getOperand(0));
Chris Lattnerf1acd962003-04-23 19:15:13 +00001667 Out << ") {\n default:\n";
John Criswell30cc2272004-10-25 18:30:09 +00001668 printPHICopiesForSuccessor (SI.getParent(), SI.getDefaultDest(), 2);
Chris Lattnerf1acd962003-04-23 19:15:13 +00001669 printBranchToBlock(SI.getParent(), SI.getDefaultDest(), 2);
Chris Lattnera9f5e052003-04-22 20:19:52 +00001670 Out << ";\n";
1671 for (unsigned i = 2, e = SI.getNumOperands(); i != e; i += 2) {
1672 Out << " case ";
1673 writeOperand(SI.getOperand(i));
1674 Out << ":\n";
1675 BasicBlock *Succ = cast<BasicBlock>(SI.getOperand(i+1));
John Criswell30cc2272004-10-25 18:30:09 +00001676 printPHICopiesForSuccessor (SI.getParent(), Succ, 2);
Chris Lattnera9f5e052003-04-22 20:19:52 +00001677 printBranchToBlock(SI.getParent(), Succ, 2);
Chris Lattnerefd02c72005-03-19 17:35:11 +00001678 if (Function::iterator(Succ) == next(Function::iterator(SI.getParent())))
Chris Lattnera9f5e052003-04-22 20:19:52 +00001679 Out << " break;\n";
1680 }
1681 Out << " }\n";
1682}
1683
Chris Lattnera9d12c02004-10-16 18:12:13 +00001684void CWriter::visitUnreachableInst(UnreachableInst &I) {
Chris Lattner963869e2004-10-17 23:49:11 +00001685 Out << " /*UNREACHABLE*/;\n";
Chris Lattnera9d12c02004-10-16 18:12:13 +00001686}
1687
Chris Lattnercb3ad012004-05-09 20:41:32 +00001688bool CWriter::isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
1689 /// FIXME: This should be reenabled, but loop reordering safe!!
1690 return true;
1691
Chris Lattner67c2d182005-03-18 16:12:37 +00001692 if (next(Function::iterator(From)) != Function::iterator(To))
1693 return true; // Not the direct successor, we need a goto.
Chris Lattnercb3ad012004-05-09 20:41:32 +00001694
1695 //isa<SwitchInst>(From->getTerminator())
Chris Lattner9bda5f52003-06-28 17:53:05 +00001696
Chris Lattnercb3ad012004-05-09 20:41:32 +00001697 if (LI->getLoopFor(From) != LI->getLoopFor(To))
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001698 return true;
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001699 return false;
1700}
1701
John Criswell57bbfce2004-10-20 14:38:39 +00001702void CWriter::printPHICopiesForSuccessor (BasicBlock *CurBlock,
Misha Brukmand6a29a52005-04-20 16:05:03 +00001703 BasicBlock *Successor,
John Criswell57bbfce2004-10-20 14:38:39 +00001704 unsigned Indent) {
1705 for (BasicBlock::iterator I = Successor->begin(); isa<PHINode>(I); ++I) {
1706 PHINode *PN = cast<PHINode>(I);
1707 // Now we have to do the printing.
1708 Value *IV = PN->getIncomingValueForBlock(CurBlock);
1709 if (!isa<UndefValue>(IV)) {
1710 Out << std::string(Indent, ' ');
1711 Out << " " << Mang->getValueName(I) << "__PHI_TEMPORARY = ";
1712 writeOperand(IV);
1713 Out << "; /* for PHI node */\n";
1714 }
1715 }
1716}
1717
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001718void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
Chris Lattner9bda5f52003-06-28 17:53:05 +00001719 unsigned Indent) {
Chris Lattnercb3ad012004-05-09 20:41:32 +00001720 if (isGotoCodeNecessary(CurBB, Succ)) {
Chris Lattneredd8ce12003-05-03 03:14:35 +00001721 Out << std::string(Indent, ' ') << " goto ";
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001722 writeOperand(Succ);
1723 Out << ";\n";
1724 }
1725}
1726
Misha Brukman37f92e22003-09-11 22:34:13 +00001727// Branch instruction printing - Avoid printing out a branch to a basic block
1728// that immediately succeeds the current one.
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001729//
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001730void CWriter::visitBranchInst(BranchInst &I) {
Chris Lattnera05e0ec2004-05-09 03:42:48 +00001731
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001732 if (I.isConditional()) {
Chris Lattner5ef6ffd2003-10-12 08:12:58 +00001733 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001734 Out << " if (";
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001735 writeOperand(I.getCondition());
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001736 Out << ") {\n";
Misha Brukmand6a29a52005-04-20 16:05:03 +00001737
John Criswell57bbfce2004-10-20 14:38:39 +00001738 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 2);
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001739 printBranchToBlock(I.getParent(), I.getSuccessor(0), 2);
Misha Brukmand6a29a52005-04-20 16:05:03 +00001740
Chris Lattner5ef6ffd2003-10-12 08:12:58 +00001741 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(1))) {
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001742 Out << " } else {\n";
John Criswell57bbfce2004-10-20 14:38:39 +00001743 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001744 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001745 }
1746 } else {
Misha Brukman5560c9d2003-08-18 14:43:39 +00001747 // First goto not necessary, assume second one is...
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001748 Out << " if (!";
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001749 writeOperand(I.getCondition());
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001750 Out << ") {\n";
1751
John Criswell57bbfce2004-10-20 14:38:39 +00001752 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001753 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001754 }
1755
1756 Out << " }\n";
1757 } else {
John Criswell57bbfce2004-10-20 14:38:39 +00001758 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 0);
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001759 printBranchToBlock(I.getParent(), I.getSuccessor(0), 0);
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001760 }
1761 Out << "\n";
1762}
1763
Chris Lattner84e66652003-05-03 07:11:00 +00001764// PHI nodes get copied into temporary values at the end of predecessor basic
1765// blocks. We now need to copy these temporary values into the REAL value for
1766// the PHI.
1767void CWriter::visitPHINode(PHINode &I) {
1768 writeOperand(&I);
1769 Out << "__PHI_TEMPORARY";
1770}
1771
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001772
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001773void CWriter::visitBinaryOperator(Instruction &I) {
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001774 // binary instructions, shift instructions, setCond instructions.
Chris Lattnerf5612b762003-04-23 19:09:22 +00001775 assert(!isa<PointerType>(I.getType()));
Brian Gaeke031a1122003-06-23 20:00:51 +00001776
1777 // We must cast the results of binary operations which might be promoted.
1778 bool needsCast = false;
1779 if ((I.getType() == Type::UByteTy) || (I.getType() == Type::SByteTy)
Brian Gaekee99f4cf2003-06-25 03:05:33 +00001780 || (I.getType() == Type::UShortTy) || (I.getType() == Type::ShortTy)
1781 || (I.getType() == Type::FloatTy)) {
Brian Gaeke031a1122003-06-23 20:00:51 +00001782 needsCast = true;
1783 Out << "((";
Chris Lattner7635ea42003-11-03 01:01:59 +00001784 printType(Out, I.getType());
Brian Gaeke031a1122003-06-23 20:00:51 +00001785 Out << ")(";
1786 }
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001787
Chris Lattner6d9b69f2005-03-03 21:12:04 +00001788 // If this is a negation operation, print it out as such. For FP, we don't
1789 // want to print "-0.0 - X".
1790 if (BinaryOperator::isNeg(&I)) {
John Criswellce4e1e42005-07-14 19:41:16 +00001791 Out << "-(";
Chris Lattner6d9b69f2005-03-03 21:12:04 +00001792 writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
John Criswellce4e1e42005-07-14 19:41:16 +00001793 Out << ")";
Reid Spencer0a783f72006-11-02 01:53:59 +00001794 } else if (I.getOpcode() == Instruction::FRem) {
Chris Lattner57da2522005-08-23 20:22:50 +00001795 // Output a call to fmod/fmodf instead of emitting a%b
1796 if (I.getType() == Type::FloatTy)
1797 Out << "fmodf(";
1798 else
1799 Out << "fmod(";
1800 writeOperand(I.getOperand(0));
1801 Out << ", ";
1802 writeOperand(I.getOperand(1));
1803 Out << ")";
Chris Lattner6d9b69f2005-03-03 21:12:04 +00001804 } else {
Reid Spencer1628cec2006-10-26 06:15:43 +00001805
1806 // Write out the cast of the instruction's value back to the proper type
1807 // if necessary.
1808 bool NeedsClosingParens = writeInstructionCast(I);
1809
1810 // Certain instructions require the operand to be forced to a specific type
1811 // so we use writeOperandWithCast here instead of writeOperand. Similarly
1812 // below for operand 1
1813 writeOperandWithCast(I.getOperand(0), I.getOpcode());
Chris Lattner6d9b69f2005-03-03 21:12:04 +00001814
1815 switch (I.getOpcode()) {
1816 case Instruction::Add: Out << " + "; break;
1817 case Instruction::Sub: Out << " - "; break;
1818 case Instruction::Mul: Out << '*'; break;
Reid Spencer0a783f72006-11-02 01:53:59 +00001819 case Instruction::URem:
1820 case Instruction::SRem:
1821 case Instruction::FRem: Out << '%'; break;
Reid Spencer1628cec2006-10-26 06:15:43 +00001822 case Instruction::UDiv:
1823 case Instruction::SDiv:
1824 case Instruction::FDiv: Out << '/'; break;
Chris Lattner6d9b69f2005-03-03 21:12:04 +00001825 case Instruction::And: Out << " & "; break;
1826 case Instruction::Or: Out << " | "; break;
1827 case Instruction::Xor: Out << " ^ "; break;
1828 case Instruction::SetEQ: Out << " == "; break;
1829 case Instruction::SetNE: Out << " != "; break;
1830 case Instruction::SetLE: Out << " <= "; break;
1831 case Instruction::SetGE: Out << " >= "; break;
1832 case Instruction::SetLT: Out << " < "; break;
1833 case Instruction::SetGT: Out << " > "; break;
1834 case Instruction::Shl : Out << " << "; break;
1835 case Instruction::Shr : Out << " >> "; break;
1836 default: std::cerr << "Invalid operator type!" << I; abort();
1837 }
1838
Reid Spencer1628cec2006-10-26 06:15:43 +00001839 writeOperandWithCast(I.getOperand(1), I.getOpcode());
1840 if (NeedsClosingParens)
1841 Out << "))";
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001842 }
1843
Brian Gaeke031a1122003-06-23 20:00:51 +00001844 if (needsCast) {
1845 Out << "))";
1846 }
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001847}
1848
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001849void CWriter::visitCastInst(CastInst &I) {
Chris Lattnerd13bd222003-06-01 03:36:51 +00001850 if (I.getType() == Type::BoolTy) {
Misha Brukmanb70aaa62005-02-14 18:52:35 +00001851 Out << '(';
Chris Lattnerd13bd222003-06-01 03:36:51 +00001852 writeOperand(I.getOperand(0));
1853 Out << " != 0)";
1854 return;
1855 }
Misha Brukmanb70aaa62005-02-14 18:52:35 +00001856 Out << '(';
Chris Lattner7635ea42003-11-03 01:01:59 +00001857 printType(Out, I.getType());
Misha Brukmanb70aaa62005-02-14 18:52:35 +00001858 Out << ')';
Chris Lattnerf5612b762003-04-23 19:09:22 +00001859 if (isa<PointerType>(I.getType())&&I.getOperand(0)->getType()->isIntegral() ||
1860 isa<PointerType>(I.getOperand(0)->getType())&&I.getType()->isIntegral()) {
1861 // Avoid "cast to pointer from integer of different size" warnings
Misha Brukmand6a29a52005-04-20 16:05:03 +00001862 Out << "(long)";
Chris Lattnerf5612b762003-04-23 19:09:22 +00001863 }
Misha Brukmand6a29a52005-04-20 16:05:03 +00001864
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001865 writeOperand(I.getOperand(0));
Chris Lattner4fbf26d2002-05-09 20:53:56 +00001866}
1867
Chris Lattner9f24a072004-03-12 05:52:14 +00001868void CWriter::visitSelectInst(SelectInst &I) {
1869 Out << "((";
1870 writeOperand(I.getCondition());
1871 Out << ") ? (";
1872 writeOperand(I.getTrueValue());
1873 Out << ") : (";
1874 writeOperand(I.getFalseValue());
Misha Brukmand6a29a52005-04-20 16:05:03 +00001875 Out << "))";
Chris Lattner9f24a072004-03-12 05:52:14 +00001876}
1877
1878
Chris Lattnerc2421432004-05-09 04:30:20 +00001879void CWriter::lowerIntrinsics(Function &F) {
1880 for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
1881 for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; )
1882 if (CallInst *CI = dyn_cast<CallInst>(I++))
1883 if (Function *F = CI->getCalledFunction())
1884 switch (F->getIntrinsicID()) {
1885 case Intrinsic::not_intrinsic:
1886 case Intrinsic::vastart:
1887 case Intrinsic::vacopy:
1888 case Intrinsic::vaend:
1889 case Intrinsic::returnaddress:
1890 case Intrinsic::frameaddress:
1891 case Intrinsic::setjmp:
1892 case Intrinsic::longjmp:
Chris Lattner33e9d292005-02-28 19:29:46 +00001893 case Intrinsic::prefetch:
Jim Laskey7075d6f2006-03-08 19:31:15 +00001894 case Intrinsic::dbg_stoppoint:
Chris Lattner1e142892006-09-09 06:17:12 +00001895 case Intrinsic::powi_f32:
1896 case Intrinsic::powi_f64:
Chris Lattnerc2421432004-05-09 04:30:20 +00001897 // We directly implement these intrinsics
1898 break;
1899 default:
Chris Lattner87242152006-03-13 23:09:05 +00001900 // If this is an intrinsic that directly corresponds to a GCC
1901 // builtin, we handle it.
1902 const char *BuiltinName = "";
1903#define GET_GCC_BUILTIN_NAME
1904#include "llvm/Intrinsics.gen"
1905#undef GET_GCC_BUILTIN_NAME
1906 // If we handle it, don't lower it.
1907 if (BuiltinName[0]) break;
1908
Chris Lattnerc2421432004-05-09 04:30:20 +00001909 // All other intrinsic calls we must lower.
Chris Lattner67c2d182005-03-18 16:12:37 +00001910 Instruction *Before = 0;
Misha Brukmand6a29a52005-04-20 16:05:03 +00001911 if (CI != &BB->front())
Chris Lattner67c2d182005-03-18 16:12:37 +00001912 Before = prior(BasicBlock::iterator(CI));
Misha Brukmand6a29a52005-04-20 16:05:03 +00001913
Chris Lattnerc2421432004-05-09 04:30:20 +00001914 IL.LowerIntrinsicCall(CI);
1915 if (Before) { // Move iterator to instruction after call
1916 I = Before; ++I;
1917 } else {
1918 I = BB->begin();
Chris Lattner4ef51372004-02-14 00:31:10 +00001919 }
Chris Lattner87242152006-03-13 23:09:05 +00001920 break;
Chris Lattnerc2421432004-05-09 04:30:20 +00001921 }
Chris Lattner4ef51372004-02-14 00:31:10 +00001922}
1923
1924
1925
Chris Lattnerbb03efd2002-06-25 15:57:03 +00001926void CWriter::visitCallInst(CallInst &I) {
Chris Lattner87242152006-03-13 23:09:05 +00001927 bool WroteCallee = false;
1928
Chris Lattner18ac3c82003-05-08 18:41:45 +00001929 // Handle intrinsic function calls first...
1930 if (Function *F = I.getCalledFunction())
Brian Gaeked0fde302003-11-11 22:41:34 +00001931 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID()) {
Chris Lattner18ac3c82003-05-08 18:41:45 +00001932 switch (ID) {
Chris Lattner87242152006-03-13 23:09:05 +00001933 default: {
1934 // If this is an intrinsic that directly corresponds to a GCC
1935 // builtin, we emit it here.
1936 const char *BuiltinName = "";
1937#define GET_GCC_BUILTIN_NAME
1938#include "llvm/Intrinsics.gen"
1939#undef GET_GCC_BUILTIN_NAME
1940 assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
1941
1942 Out << BuiltinName;
1943 WroteCallee = true;
1944 break;
1945 }
Misha Brukmand6a29a52005-04-20 16:05:03 +00001946 case Intrinsic::vastart:
Chris Lattner4d45bd02003-10-18 05:57:43 +00001947 Out << "0; ";
Misha Brukmand6a29a52005-04-20 16:05:03 +00001948
Andrew Lenharth558bc882005-06-18 18:34:52 +00001949 Out << "va_start(*(va_list*)";
1950 writeOperand(I.getOperand(1));
1951 Out << ", ";
Chris Lattner18ac3c82003-05-08 18:41:45 +00001952 // Output the last argument to the enclosing function...
Chris Lattnere4d5c442005-03-15 04:54:21 +00001953 if (I.getParent()->getParent()->arg_empty()) {
Chris Lattner4065ef92003-10-23 18:39:22 +00001954 std::cerr << "The C backend does not currently support zero "
1955 << "argument varargs functions, such as '"
1956 << I.getParent()->getParent()->getName() << "'!\n";
1957 abort();
1958 }
Chris Lattnerc5e7df12005-03-15 04:59:17 +00001959 writeOperand(--I.getParent()->getParent()->arg_end());
Misha Brukmanb70aaa62005-02-14 18:52:35 +00001960 Out << ')';
Chris Lattner18ac3c82003-05-08 18:41:45 +00001961 return;
Chris Lattner317201d2004-03-13 00:24:00 +00001962 case Intrinsic::vaend:
Chris Lattnerf8e6f4f2004-08-10 00:19:16 +00001963 if (!isa<ConstantPointerNull>(I.getOperand(1))) {
Andrew Lenharth558bc882005-06-18 18:34:52 +00001964 Out << "0; va_end(*(va_list*)";
Chris Lattnerf8e6f4f2004-08-10 00:19:16 +00001965 writeOperand(I.getOperand(1));
Misha Brukmanb70aaa62005-02-14 18:52:35 +00001966 Out << ')';
Chris Lattnerf8e6f4f2004-08-10 00:19:16 +00001967 } else {
1968 Out << "va_end(*(va_list*)0)";
1969 }
Chris Lattner18ac3c82003-05-08 18:41:45 +00001970 return;
Chris Lattner317201d2004-03-13 00:24:00 +00001971 case Intrinsic::vacopy:
Andrew Lenharth558bc882005-06-18 18:34:52 +00001972 Out << "0; ";
1973 Out << "va_copy(*(va_list*)";
Chris Lattner18ac3c82003-05-08 18:41:45 +00001974 writeOperand(I.getOperand(1));
Andrew Lenharth213e5572005-06-22 21:04:42 +00001975 Out << ", *(va_list*)";
Andrew Lenharth558bc882005-06-18 18:34:52 +00001976 writeOperand(I.getOperand(2));
Misha Brukmanb70aaa62005-02-14 18:52:35 +00001977 Out << ')';
Chris Lattner18ac3c82003-05-08 18:41:45 +00001978 return;
Chris Lattnerfe1554a2004-02-14 02:55:36 +00001979 case Intrinsic::returnaddress:
1980 Out << "__builtin_return_address(";
1981 writeOperand(I.getOperand(1));
Misha Brukmanb70aaa62005-02-14 18:52:35 +00001982 Out << ')';
Chris Lattnerfe1554a2004-02-14 02:55:36 +00001983 return;
1984 case Intrinsic::frameaddress:
1985 Out << "__builtin_frame_address(";
1986 writeOperand(I.getOperand(1));
Misha Brukmanb70aaa62005-02-14 18:52:35 +00001987 Out << ')';
Chris Lattnerfe1554a2004-02-14 02:55:36 +00001988 return;
Chris Lattner1e142892006-09-09 06:17:12 +00001989 case Intrinsic::powi_f32:
1990 case Intrinsic::powi_f64:
1991 Out << "__builtin_powi(";
1992 writeOperand(I.getOperand(1));
1993 Out << ", ";
1994 writeOperand(I.getOperand(2));
1995 Out << ')';
1996 return;
Chris Lattnere42cde22004-02-15 22:51:47 +00001997 case Intrinsic::setjmp:
Chris Lattner475c5532006-06-06 21:45:47 +00001998#if defined(HAVE__SETJMP) && defined(HAVE__LONGJMP)
1999 Out << "_"; // Use _setjmp on systems that support it!
2000#endif
Chris Lattnere42cde22004-02-15 22:51:47 +00002001 Out << "setjmp(*(jmp_buf*)";
2002 writeOperand(I.getOperand(1));
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002003 Out << ')';
Chris Lattnere42cde22004-02-15 22:51:47 +00002004 return;
2005 case Intrinsic::longjmp:
Chris Lattner475c5532006-06-06 21:45:47 +00002006#if defined(HAVE__SETJMP) && defined(HAVE__LONGJMP)
2007 Out << "_"; // Use _longjmp on systems that support it!
2008#endif
Chris Lattnere42cde22004-02-15 22:51:47 +00002009 Out << "longjmp(*(jmp_buf*)";
2010 writeOperand(I.getOperand(1));
2011 Out << ", ";
2012 writeOperand(I.getOperand(2));
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002013 Out << ')';
Chris Lattnere42cde22004-02-15 22:51:47 +00002014 return;
Chris Lattner33e9d292005-02-28 19:29:46 +00002015 case Intrinsic::prefetch:
Chris Lattnerca76f352005-02-28 19:36:15 +00002016 Out << "LLVM_PREFETCH((const void *)";
Chris Lattner33e9d292005-02-28 19:29:46 +00002017 writeOperand(I.getOperand(1));
2018 Out << ", ";
2019 writeOperand(I.getOperand(2));
2020 Out << ", ";
2021 writeOperand(I.getOperand(3));
2022 Out << ")";
Chris Lattnerca76f352005-02-28 19:36:15 +00002023 return;
Jim Laskey7075d6f2006-03-08 19:31:15 +00002024 case Intrinsic::dbg_stoppoint: {
2025 // If we use writeOperand directly we get a "u" suffix which is rejected
2026 // by gcc.
Jim Laskey580418e2006-03-23 18:08:29 +00002027 DbgStopPointInst &SPI = cast<DbgStopPointInst>(I);
Jim Laskey7075d6f2006-03-08 19:31:15 +00002028
2029 Out << "\n#line "
Jim Laskey580418e2006-03-23 18:08:29 +00002030 << SPI.getLine()
2031 << " \"" << SPI.getDirectory()
2032 << SPI.getFileName() << "\"\n";
Jim Laskey7075d6f2006-03-08 19:31:15 +00002033 return;
2034 }
Chris Lattner18ac3c82003-05-08 18:41:45 +00002035 }
2036 }
2037
Chris Lattner4394d512004-11-13 22:21:56 +00002038 Value *Callee = I.getCalledValue();
Misha Brukmand6a29a52005-04-20 16:05:03 +00002039
Chris Lattner0c54d892006-05-23 23:39:48 +00002040 // If this is a call to a struct-return function, assign to the first
2041 // parameter instead of passing it to the call.
2042 bool isStructRet = I.getCallingConv() == CallingConv::CSRet;
2043 if (isStructRet) {
2044 Out << "*(";
2045 writeOperand(I.getOperand(1));
2046 Out << ") = ";
2047 }
2048
Chris Lattnerfe673d92005-05-06 06:53:07 +00002049 if (I.isTailCall()) Out << " /*tail*/ ";
Chris Lattner4394d512004-11-13 22:21:56 +00002050
2051 const PointerType *PTy = cast<PointerType>(Callee->getType());
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002052 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
Chris Lattner0c54d892006-05-23 23:39:48 +00002053
2054 if (!WroteCallee) {
2055 // If this is an indirect call to a struct return function, we need to cast
2056 // the pointer.
2057 bool NeedsCast = isStructRet && !isa<Function>(Callee);
Misha Brukmand6a29a52005-04-20 16:05:03 +00002058
Chris Lattner0c54d892006-05-23 23:39:48 +00002059 // GCC is a real PITA. It does not permit codegening casts of functions to
2060 // function pointers if they are in a call (it generates a trap instruction
2061 // instead!). We work around this by inserting a cast to void* in between
2062 // the function and the function pointer cast. Unfortunately, we can't just
2063 // form the constant expression here, because the folder will immediately
2064 // nuke it.
2065 //
2066 // Note finally, that this is completely unsafe. ANSI C does not guarantee
2067 // that void* and function pointers have the same size. :( To deal with this
2068 // in the common case, we handle casts where the number of arguments passed
2069 // match exactly.
2070 //
2071 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Callee))
2072 if (CE->getOpcode() == Instruction::Cast)
2073 if (Function *RF = dyn_cast<Function>(CE->getOperand(0))) {
2074 NeedsCast = true;
2075 Callee = RF;
2076 }
2077
2078 if (NeedsCast) {
2079 // Ok, just cast the pointer type.
2080 Out << "((";
2081 if (!isStructRet)
2082 printType(Out, I.getCalledValue()->getType());
2083 else
2084 printStructReturnPointerFunctionType(Out,
2085 cast<PointerType>(I.getCalledValue()->getType()));
2086 Out << ")(void*)";
2087 }
2088 writeOperand(Callee);
2089 if (NeedsCast) Out << ')';
2090 }
2091
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002092 Out << '(';
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002093
Chris Lattner4394d512004-11-13 22:21:56 +00002094 unsigned NumDeclaredParams = FTy->getNumParams();
2095
Chris Lattner0c54d892006-05-23 23:39:48 +00002096 CallSite::arg_iterator AI = I.op_begin()+1, AE = I.op_end();
2097 unsigned ArgNo = 0;
2098 if (isStructRet) { // Skip struct return argument.
2099 ++AI;
2100 ++ArgNo;
2101 }
2102
2103 bool PrintedArg = false;
2104 for (; AI != AE; ++AI, ++ArgNo) {
2105 if (PrintedArg) Out << ", ";
2106 if (ArgNo < NumDeclaredParams &&
2107 (*AI)->getType() != FTy->getParamType(ArgNo)) {
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002108 Out << '(';
Chris Lattner0c54d892006-05-23 23:39:48 +00002109 printType(Out, FTy->getParamType(ArgNo));
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002110 Out << ')';
Chris Lattner4394d512004-11-13 22:21:56 +00002111 }
Chris Lattner9bda5f52003-06-28 17:53:05 +00002112 writeOperand(*AI);
Chris Lattner0c54d892006-05-23 23:39:48 +00002113 PrintedArg = true;
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002114 }
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002115 Out << ')';
Misha Brukmand6a29a52005-04-20 16:05:03 +00002116}
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002117
Chris Lattnerbb03efd2002-06-25 15:57:03 +00002118void CWriter::visitMallocInst(MallocInst &I) {
Chris Lattnerf31182a2004-02-13 23:18:48 +00002119 assert(0 && "lowerallocations pass didn't work!");
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002120}
2121
Chris Lattnerbb03efd2002-06-25 15:57:03 +00002122void CWriter::visitAllocaInst(AllocaInst &I) {
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002123 Out << '(';
Nick Hildenbrandt98502372002-11-18 20:55:50 +00002124 printType(Out, I.getType());
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002125 Out << ") alloca(sizeof(";
Nick Hildenbrandt98502372002-11-18 20:55:50 +00002126 printType(Out, I.getType()->getElementType());
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002127 Out << ')';
Chris Lattnerbb03efd2002-06-25 15:57:03 +00002128 if (I.isArrayAllocation()) {
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002129 Out << " * " ;
Chris Lattnerbb03efd2002-06-25 15:57:03 +00002130 writeOperand(I.getOperand(0));
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002131 }
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002132 Out << ')';
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002133}
2134
Chris Lattnerbb03efd2002-06-25 15:57:03 +00002135void CWriter::visitFreeInst(FreeInst &I) {
Chris Lattnerf31182a2004-02-13 23:18:48 +00002136 assert(0 && "lowerallocations pass didn't work!");
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002137}
2138
Chris Lattner23e90702003-11-25 20:49:55 +00002139void CWriter::printIndexingExpression(Value *Ptr, gep_type_iterator I,
2140 gep_type_iterator E) {
Chris Lattnerdf35a1c2002-08-19 23:09:46 +00002141 bool HasImplicitAddress = false;
2142 // If accessing a global value with no indexing, avoid *(&GV) syndrome
2143 if (GlobalValue *V = dyn_cast<GlobalValue>(Ptr)) {
2144 HasImplicitAddress = true;
Chris Lattnera8ab89e2003-06-17 04:39:14 +00002145 } else if (isDirectAlloca(Ptr)) {
2146 HasImplicitAddress = true;
Chris Lattnerd0c668c2002-05-09 21:18:38 +00002147 }
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002148
Chris Lattnerdf35a1c2002-08-19 23:09:46 +00002149 if (I == E) {
2150 if (!HasImplicitAddress)
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002151 Out << '*'; // Implicit zero first argument: '*x' is equivalent to 'x[0]'
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002152
Chris Lattnerdf35a1c2002-08-19 23:09:46 +00002153 writeOperandInternal(Ptr);
2154 return;
2155 }
2156
Chris Lattner23e90702003-11-25 20:49:55 +00002157 const Constant *CI = dyn_cast<Constant>(I.getOperand());
Chris Lattnerdf35a1c2002-08-19 23:09:46 +00002158 if (HasImplicitAddress && (!CI || !CI->isNullValue()))
2159 Out << "(&";
2160
2161 writeOperandInternal(Ptr);
2162
Nick Hildenbrandte548f002002-09-25 20:29:26 +00002163 if (HasImplicitAddress && (!CI || !CI->isNullValue())) {
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002164 Out << ')';
Nick Hildenbrandte548f002002-09-25 20:29:26 +00002165 HasImplicitAddress = false; // HIA is only true if we haven't addressed yet
2166 }
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002167
Nick Hildenbrandte548f002002-09-25 20:29:26 +00002168 assert(!HasImplicitAddress || (CI && CI->isNullValue()) &&
2169 "Can only have implicit address with direct accessing");
2170
2171 if (HasImplicitAddress) {
2172 ++I;
Chris Lattner23e90702003-11-25 20:49:55 +00002173 } else if (CI && CI->isNullValue()) {
2174 gep_type_iterator TmpI = I; ++TmpI;
2175
Nick Hildenbrandte548f002002-09-25 20:29:26 +00002176 // Print out the -> operator if possible...
Chris Lattner23e90702003-11-25 20:49:55 +00002177 if (TmpI != E && isa<StructType>(*TmpI)) {
Chris Lattnerdf35a1c2002-08-19 23:09:46 +00002178 Out << (HasImplicitAddress ? "." : "->");
Reid Spencerb83eb642006-10-20 07:07:24 +00002179 Out << "field" << cast<ConstantInt>(TmpI.getOperand())->getZExtValue();
Chris Lattner23e90702003-11-25 20:49:55 +00002180 I = ++TmpI;
2181 }
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002182 }
Chris Lattner5dfe7672002-08-22 22:48:55 +00002183
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002184 for (; I != E; ++I)
Chris Lattner23e90702003-11-25 20:49:55 +00002185 if (isa<StructType>(*I)) {
Reid Spencerb83eb642006-10-20 07:07:24 +00002186 Out << ".field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002187 } else {
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002188 Out << '[';
Chris Lattner23e90702003-11-25 20:49:55 +00002189 writeOperand(I.getOperand());
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002190 Out << ']';
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002191 }
2192}
2193
Chris Lattnerbb03efd2002-06-25 15:57:03 +00002194void CWriter::visitLoadInst(LoadInst &I) {
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002195 Out << '*';
Chris Lattner9d30e222005-02-14 16:47:52 +00002196 if (I.isVolatile()) {
Chris Lattner8399e022005-02-15 05:52:14 +00002197 Out << "((";
Chris Lattnerb94388a2005-09-27 20:52:44 +00002198 printType(Out, I.getType(), "volatile*");
2199 Out << ")";
Chris Lattner9d30e222005-02-14 16:47:52 +00002200 }
2201
Chris Lattner5dfe7672002-08-22 22:48:55 +00002202 writeOperand(I.getOperand(0));
Chris Lattner9d30e222005-02-14 16:47:52 +00002203
2204 if (I.isVolatile())
Misha Brukman23ba0c52005-03-08 00:26:08 +00002205 Out << ')';
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002206}
2207
Chris Lattnerbb03efd2002-06-25 15:57:03 +00002208void CWriter::visitStoreInst(StoreInst &I) {
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002209 Out << '*';
Chris Lattner9d30e222005-02-14 16:47:52 +00002210 if (I.isVolatile()) {
Chris Lattner8399e022005-02-15 05:52:14 +00002211 Out << "((";
Chris Lattnerb94388a2005-09-27 20:52:44 +00002212 printType(Out, I.getOperand(0)->getType(), " volatile*");
2213 Out << ")";
Chris Lattner9d30e222005-02-14 16:47:52 +00002214 }
Chris Lattner5dfe7672002-08-22 22:48:55 +00002215 writeOperand(I.getPointerOperand());
Misha Brukman23ba0c52005-03-08 00:26:08 +00002216 if (I.isVolatile()) Out << ')';
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002217 Out << " = ";
Chris Lattnerbb03efd2002-06-25 15:57:03 +00002218 writeOperand(I.getOperand(0));
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002219}
2220
Chris Lattnerbb03efd2002-06-25 15:57:03 +00002221void CWriter::visitGetElementPtrInst(GetElementPtrInst &I) {
Misha Brukmanb70aaa62005-02-14 18:52:35 +00002222 Out << '&';
Chris Lattner23e90702003-11-25 20:49:55 +00002223 printIndexingExpression(I.getPointerOperand(), gep_type_begin(I),
2224 gep_type_end(I));
Chris Lattner4fbf26d2002-05-09 20:53:56 +00002225}
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00002226
Chris Lattner4d45bd02003-10-18 05:57:43 +00002227void CWriter::visitVAArgInst(VAArgInst &I) {
Andrew Lenharth558bc882005-06-18 18:34:52 +00002228 Out << "va_arg(*(va_list*)";
Chris Lattner4d45bd02003-10-18 05:57:43 +00002229 writeOperand(I.getOperand(0));
Andrew Lenharth558bc882005-06-18 18:34:52 +00002230 Out << ", ";
Chris Lattner7635ea42003-11-03 01:01:59 +00002231 printType(Out, I.getType());
Andrew Lenharth558bc882005-06-18 18:34:52 +00002232 Out << ");\n ";
Chris Lattner4d45bd02003-10-18 05:57:43 +00002233}
2234
Sumant Kowshik9ddc86c2002-05-08 18:09:58 +00002235//===----------------------------------------------------------------------===//
2236// External Interface declaration
2237//===----------------------------------------------------------------------===//
2238
Chris Lattner1911fd42006-09-04 04:14:57 +00002239bool CTargetMachine::addPassesToEmitWholeFile(PassManager &PM,
2240 std::ostream &o,
2241 CodeGenFileType FileType,
2242 bool Fast) {
Chris Lattner0431c962005-06-25 02:48:37 +00002243 if (FileType != TargetMachine::AssemblyFile) return true;
2244
Chris Lattner99c59e82004-05-23 21:23:35 +00002245 PM.add(createLowerGCPass());
Chris Lattnerf7fe4942005-03-03 01:04:50 +00002246 PM.add(createLowerAllocationsPass(true));
Chris Lattner94f4f8e2004-02-13 23:00:29 +00002247 PM.add(createLowerInvokePass());
Chris Lattnerbad13eb2005-11-02 17:42:58 +00002248 PM.add(createCFGSimplificationPass()); // clean up after lower invoke.
Chris Lattnerf9a05322006-02-13 22:22:42 +00002249 PM.add(new CBackendNameAllUsedStructsAndMergeFunctions());
Chris Lattnerbc641b92006-03-23 05:43:16 +00002250 PM.add(new CWriter(o));
Chris Lattnerf31182a2004-02-13 23:18:48 +00002251 return false;
2252}