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Dan Gohmanf17a25c2007-07-18 16:29:46 +00001//===--- Bitcode/Writer/BitcodeWriter.cpp - Bitcode Writer ----------------===//
2//
3// The LLVM Compiler Infrastructure
4//
Chris Lattner081ce942007-12-29 20:36:04 +00005// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
Dan Gohmanf17a25c2007-07-18 16:29:46 +00007//
8//===----------------------------------------------------------------------===//
9//
10// Bitcode writer implementation.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/Bitcode/ReaderWriter.h"
15#include "llvm/Bitcode/BitstreamWriter.h"
16#include "llvm/Bitcode/LLVMBitCodes.h"
17#include "ValueEnumerator.h"
18#include "llvm/Constants.h"
19#include "llvm/DerivedTypes.h"
20#include "llvm/InlineAsm.h"
21#include "llvm/Instructions.h"
Chris Lattner85c4ec22009-10-27 17:08:31 +000022#include "llvm/LLVMContext.h"
Devang Patel7c368852009-07-28 21:49:47 +000023#include "llvm/Metadata.h"
Dan Gohmanf17a25c2007-07-18 16:29:46 +000024#include "llvm/Module.h"
Dan Gohman799a8c82009-07-20 21:19:07 +000025#include "llvm/Operator.h"
Dan Gohmanf17a25c2007-07-18 16:29:46 +000026#include "llvm/TypeSymbolTable.h"
27#include "llvm/ValueSymbolTable.h"
Edwin Török675d5622009-07-11 20:10:48 +000028#include "llvm/Support/ErrorHandling.h"
Dan Gohmanf17a25c2007-07-18 16:29:46 +000029#include "llvm/Support/MathExtras.h"
Daniel Dunbarf741f2a2008-10-22 17:39:14 +000030#include "llvm/Support/raw_ostream.h"
Anton Korobeynikova460a3a2008-06-06 07:24:01 +000031#include "llvm/System/Program.h"
Dan Gohmanf17a25c2007-07-18 16:29:46 +000032using namespace llvm;
33
34/// These are manifest constants used by the bitcode writer. They do not need to
35/// be kept in sync with the reader, but need to be consistent within this file.
36enum {
37 CurVersion = 0,
Daniel Dunbar3be44e62009-09-20 02:20:51 +000038
Dan Gohmanf17a25c2007-07-18 16:29:46 +000039 // VALUE_SYMTAB_BLOCK abbrev id's.
40 VST_ENTRY_8_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
41 VST_ENTRY_7_ABBREV,
42 VST_ENTRY_6_ABBREV,
43 VST_BBENTRY_6_ABBREV,
Daniel Dunbar3be44e62009-09-20 02:20:51 +000044
Dan Gohmanf17a25c2007-07-18 16:29:46 +000045 // CONSTANTS_BLOCK abbrev id's.
46 CONSTANTS_SETTYPE_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
47 CONSTANTS_INTEGER_ABBREV,
48 CONSTANTS_CE_CAST_Abbrev,
49 CONSTANTS_NULL_Abbrev,
Daniel Dunbar3be44e62009-09-20 02:20:51 +000050
Dan Gohmanf17a25c2007-07-18 16:29:46 +000051 // FUNCTION_BLOCK abbrev id's.
52 FUNCTION_INST_LOAD_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
53 FUNCTION_INST_BINOP_ABBREV,
Dan Gohman799a8c82009-07-20 21:19:07 +000054 FUNCTION_INST_BINOP_FLAGS_ABBREV,
Dan Gohmanf17a25c2007-07-18 16:29:46 +000055 FUNCTION_INST_CAST_ABBREV,
56 FUNCTION_INST_RET_VOID_ABBREV,
57 FUNCTION_INST_RET_VAL_ABBREV,
58 FUNCTION_INST_UNREACHABLE_ABBREV
59};
60
61
62static unsigned GetEncodedCastOpcode(unsigned Opcode) {
63 switch (Opcode) {
Edwin Törökbd448e32009-07-14 16:55:14 +000064 default: llvm_unreachable("Unknown cast instruction!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +000065 case Instruction::Trunc : return bitc::CAST_TRUNC;
66 case Instruction::ZExt : return bitc::CAST_ZEXT;
67 case Instruction::SExt : return bitc::CAST_SEXT;
68 case Instruction::FPToUI : return bitc::CAST_FPTOUI;
69 case Instruction::FPToSI : return bitc::CAST_FPTOSI;
70 case Instruction::UIToFP : return bitc::CAST_UITOFP;
71 case Instruction::SIToFP : return bitc::CAST_SITOFP;
72 case Instruction::FPTrunc : return bitc::CAST_FPTRUNC;
73 case Instruction::FPExt : return bitc::CAST_FPEXT;
74 case Instruction::PtrToInt: return bitc::CAST_PTRTOINT;
75 case Instruction::IntToPtr: return bitc::CAST_INTTOPTR;
76 case Instruction::BitCast : return bitc::CAST_BITCAST;
77 }
78}
79
80static unsigned GetEncodedBinaryOpcode(unsigned Opcode) {
81 switch (Opcode) {
Edwin Törökbd448e32009-07-14 16:55:14 +000082 default: llvm_unreachable("Unknown binary instruction!");
Dan Gohman7ce405e2009-06-04 22:49:04 +000083 case Instruction::Add:
84 case Instruction::FAdd: return bitc::BINOP_ADD;
85 case Instruction::Sub:
86 case Instruction::FSub: return bitc::BINOP_SUB;
87 case Instruction::Mul:
88 case Instruction::FMul: return bitc::BINOP_MUL;
Dan Gohmanf17a25c2007-07-18 16:29:46 +000089 case Instruction::UDiv: return bitc::BINOP_UDIV;
90 case Instruction::FDiv:
91 case Instruction::SDiv: return bitc::BINOP_SDIV;
92 case Instruction::URem: return bitc::BINOP_UREM;
93 case Instruction::FRem:
94 case Instruction::SRem: return bitc::BINOP_SREM;
95 case Instruction::Shl: return bitc::BINOP_SHL;
96 case Instruction::LShr: return bitc::BINOP_LSHR;
97 case Instruction::AShr: return bitc::BINOP_ASHR;
98 case Instruction::And: return bitc::BINOP_AND;
99 case Instruction::Or: return bitc::BINOP_OR;
100 case Instruction::Xor: return bitc::BINOP_XOR;
101 }
102}
103
104
105
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000106static void WriteStringRecord(unsigned Code, const std::string &Str,
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000107 unsigned AbbrevToUse, BitstreamWriter &Stream) {
108 SmallVector<unsigned, 64> Vals;
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000109
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000110 // Code: [strchar x N]
111 for (unsigned i = 0, e = Str.size(); i != e; ++i)
112 Vals.push_back(Str[i]);
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000113
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000114 // Emit the finished record.
115 Stream.EmitRecord(Code, Vals, AbbrevToUse);
116}
117
118// Emit information about parameter attributes.
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000119static void WriteAttributeTable(const ValueEnumerator &VE,
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000120 BitstreamWriter &Stream) {
Devang Pateld222f862008-09-25 21:00:45 +0000121 const std::vector<AttrListPtr> &Attrs = VE.getAttributes();
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000122 if (Attrs.empty()) return;
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000123
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000124 Stream.EnterSubblock(bitc::PARAMATTR_BLOCK_ID, 3);
125
126 SmallVector<uint64_t, 64> Record;
127 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
Devang Pateld222f862008-09-25 21:00:45 +0000128 const AttrListPtr &A = Attrs[i];
Chris Lattner1c8733e2008-03-12 17:45:29 +0000129 for (unsigned i = 0, e = A.getNumSlots(); i != e; ++i) {
Devang Pateld222f862008-09-25 21:00:45 +0000130 const AttributeWithIndex &PAWI = A.getSlot(i);
Chris Lattner1c8733e2008-03-12 17:45:29 +0000131 Record.push_back(PAWI.Index);
Nick Lewycky4029a942008-12-19 09:38:31 +0000132
133 // FIXME: remove in LLVM 3.0
134 // Store the alignment in the bitcode as a 16-bit raw value instead of a
135 // 5-bit log2 encoded value. Shift the bits above the alignment up by
136 // 11 bits.
137 uint64_t FauxAttr = PAWI.Attrs & 0xffff;
138 if (PAWI.Attrs & Attribute::Alignment)
139 FauxAttr |= (1ull<<16)<<(((PAWI.Attrs & Attribute::Alignment)-1) >> 16);
140 FauxAttr |= (PAWI.Attrs & (0x3FFull << 21)) << 11;
141
142 Record.push_back(FauxAttr);
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000143 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000144
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000145 Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record);
146 Record.clear();
147 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000148
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000149 Stream.ExitBlock();
150}
151
152/// WriteTypeTable - Write out the type table for a module.
153static void WriteTypeTable(const ValueEnumerator &VE, BitstreamWriter &Stream) {
154 const ValueEnumerator::TypeList &TypeList = VE.getTypes();
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000155
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000156 Stream.EnterSubblock(bitc::TYPE_BLOCK_ID, 4 /*count from # abbrevs */);
157 SmallVector<uint64_t, 64> TypeVals;
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000158
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000159 // Abbrev for TYPE_CODE_POINTER.
160 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
161 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_POINTER));
162 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
163 Log2_32_Ceil(VE.getTypes().size()+1)));
Christopher Lamb20a39e92007-12-12 08:44:39 +0000164 Abbv->Add(BitCodeAbbrevOp(0)); // Addrspace = 0
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000165 unsigned PtrAbbrev = Stream.EmitAbbrev(Abbv);
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000166
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000167 // Abbrev for TYPE_CODE_FUNCTION.
168 Abbv = new BitCodeAbbrev();
169 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_FUNCTION));
170 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isvararg
Chris Lattner70b644d2007-11-27 17:48:06 +0000171 Abbv->Add(BitCodeAbbrevOp(0)); // FIXME: DEAD value, remove in LLVM 3.0
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000172 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
173 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
174 Log2_32_Ceil(VE.getTypes().size()+1)));
175 unsigned FunctionAbbrev = Stream.EmitAbbrev(Abbv);
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000176
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000177 // Abbrev for TYPE_CODE_STRUCT.
178 Abbv = new BitCodeAbbrev();
179 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT));
180 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked
181 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
182 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
183 Log2_32_Ceil(VE.getTypes().size()+1)));
184 unsigned StructAbbrev = Stream.EmitAbbrev(Abbv);
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000185
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000186 // Abbrev for TYPE_CODE_ARRAY.
187 Abbv = new BitCodeAbbrev();
188 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_ARRAY));
189 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // size
190 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
191 Log2_32_Ceil(VE.getTypes().size()+1)));
192 unsigned ArrayAbbrev = Stream.EmitAbbrev(Abbv);
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000193
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000194 // Emit an entry count so the reader can reserve space.
195 TypeVals.push_back(TypeList.size());
196 Stream.EmitRecord(bitc::TYPE_CODE_NUMENTRY, TypeVals);
197 TypeVals.clear();
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000198
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000199 // Loop over all of the types, emitting each in turn.
200 for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
201 const Type *T = TypeList[i].first;
202 int AbbrevToUse = 0;
203 unsigned Code = 0;
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000204
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000205 switch (T->getTypeID()) {
Edwin Törökbd448e32009-07-14 16:55:14 +0000206 default: llvm_unreachable("Unknown type!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000207 case Type::VoidTyID: Code = bitc::TYPE_CODE_VOID; break;
208 case Type::FloatTyID: Code = bitc::TYPE_CODE_FLOAT; break;
209 case Type::DoubleTyID: Code = bitc::TYPE_CODE_DOUBLE; break;
Dale Johannesenf325d9f2007-08-03 01:03:46 +0000210 case Type::X86_FP80TyID: Code = bitc::TYPE_CODE_X86_FP80; break;
211 case Type::FP128TyID: Code = bitc::TYPE_CODE_FP128; break;
212 case Type::PPC_FP128TyID: Code = bitc::TYPE_CODE_PPC_FP128; break;
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000213 case Type::LabelTyID: Code = bitc::TYPE_CODE_LABEL; break;
214 case Type::OpaqueTyID: Code = bitc::TYPE_CODE_OPAQUE; break;
Nick Lewycky29aaef82009-05-30 05:06:04 +0000215 case Type::MetadataTyID: Code = bitc::TYPE_CODE_METADATA; break;
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000216 case Type::IntegerTyID:
217 // INTEGER: [width]
218 Code = bitc::TYPE_CODE_INTEGER;
219 TypeVals.push_back(cast<IntegerType>(T)->getBitWidth());
220 break;
Duncan Sandsc7ef4d12007-12-11 12:20:47 +0000221 case Type::PointerTyID: {
Christopher Lamb44d62f62007-12-11 08:59:05 +0000222 const PointerType *PTy = cast<PointerType>(T);
Christopher Lamb20a39e92007-12-12 08:44:39 +0000223 // POINTER: [pointee type, address space]
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000224 Code = bitc::TYPE_CODE_POINTER;
Christopher Lamb44d62f62007-12-11 08:59:05 +0000225 TypeVals.push_back(VE.getTypeID(PTy->getElementType()));
Christopher Lamb20a39e92007-12-12 08:44:39 +0000226 unsigned AddressSpace = PTy->getAddressSpace();
227 TypeVals.push_back(AddressSpace);
228 if (AddressSpace == 0) AbbrevToUse = PtrAbbrev;
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000229 break;
Duncan Sandsc7ef4d12007-12-11 12:20:47 +0000230 }
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000231 case Type::FunctionTyID: {
232 const FunctionType *FT = cast<FunctionType>(T);
Chris Lattner70b644d2007-11-27 17:48:06 +0000233 // FUNCTION: [isvararg, attrid, retty, paramty x N]
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000234 Code = bitc::TYPE_CODE_FUNCTION;
235 TypeVals.push_back(FT->isVarArg());
Chris Lattner70b644d2007-11-27 17:48:06 +0000236 TypeVals.push_back(0); // FIXME: DEAD: remove in llvm 3.0
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000237 TypeVals.push_back(VE.getTypeID(FT->getReturnType()));
238 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i)
239 TypeVals.push_back(VE.getTypeID(FT->getParamType(i)));
240 AbbrevToUse = FunctionAbbrev;
241 break;
242 }
243 case Type::StructTyID: {
244 const StructType *ST = cast<StructType>(T);
245 // STRUCT: [ispacked, eltty x N]
246 Code = bitc::TYPE_CODE_STRUCT;
247 TypeVals.push_back(ST->isPacked());
248 // Output all of the element types.
249 for (StructType::element_iterator I = ST->element_begin(),
250 E = ST->element_end(); I != E; ++I)
251 TypeVals.push_back(VE.getTypeID(*I));
252 AbbrevToUse = StructAbbrev;
253 break;
254 }
255 case Type::ArrayTyID: {
256 const ArrayType *AT = cast<ArrayType>(T);
257 // ARRAY: [numelts, eltty]
258 Code = bitc::TYPE_CODE_ARRAY;
259 TypeVals.push_back(AT->getNumElements());
260 TypeVals.push_back(VE.getTypeID(AT->getElementType()));
261 AbbrevToUse = ArrayAbbrev;
262 break;
263 }
264 case Type::VectorTyID: {
265 const VectorType *VT = cast<VectorType>(T);
266 // VECTOR [numelts, eltty]
267 Code = bitc::TYPE_CODE_VECTOR;
268 TypeVals.push_back(VT->getNumElements());
269 TypeVals.push_back(VE.getTypeID(VT->getElementType()));
270 break;
271 }
272 }
273
274 // Emit the finished record.
275 Stream.EmitRecord(Code, TypeVals, AbbrevToUse);
276 TypeVals.clear();
277 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000278
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000279 Stream.ExitBlock();
280}
281
282static unsigned getEncodedLinkage(const GlobalValue *GV) {
283 switch (GV->getLinkage()) {
Edwin Törökbd448e32009-07-14 16:55:14 +0000284 default: llvm_unreachable("Invalid linkage!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000285 case GlobalValue::GhostLinkage: // Map ghost linkage onto external.
Bill Wendling41a07852009-07-20 01:03:30 +0000286 case GlobalValue::ExternalLinkage: return 0;
287 case GlobalValue::WeakAnyLinkage: return 1;
288 case GlobalValue::AppendingLinkage: return 2;
289 case GlobalValue::InternalLinkage: return 3;
290 case GlobalValue::LinkOnceAnyLinkage: return 4;
291 case GlobalValue::DLLImportLinkage: return 5;
292 case GlobalValue::DLLExportLinkage: return 6;
293 case GlobalValue::ExternalWeakLinkage: return 7;
294 case GlobalValue::CommonLinkage: return 8;
295 case GlobalValue::PrivateLinkage: return 9;
296 case GlobalValue::WeakODRLinkage: return 10;
297 case GlobalValue::LinkOnceODRLinkage: return 11;
298 case GlobalValue::AvailableExternallyLinkage: return 12;
299 case GlobalValue::LinkerPrivateLinkage: return 13;
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000300 }
301}
302
303static unsigned getEncodedVisibility(const GlobalValue *GV) {
304 switch (GV->getVisibility()) {
Edwin Törökbd448e32009-07-14 16:55:14 +0000305 default: llvm_unreachable("Invalid visibility!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000306 case GlobalValue::DefaultVisibility: return 0;
307 case GlobalValue::HiddenVisibility: return 1;
308 case GlobalValue::ProtectedVisibility: return 2;
309 }
310}
311
312// Emit top-level description of module, including target triple, inline asm,
313// descriptors for global variables, and function prototype info.
314static void WriteModuleInfo(const Module *M, const ValueEnumerator &VE,
315 BitstreamWriter &Stream) {
316 // Emit the list of dependent libraries for the Module.
317 for (Module::lib_iterator I = M->lib_begin(), E = M->lib_end(); I != E; ++I)
318 WriteStringRecord(bitc::MODULE_CODE_DEPLIB, *I, 0/*TODO*/, Stream);
319
320 // Emit various pieces of data attached to a module.
321 if (!M->getTargetTriple().empty())
322 WriteStringRecord(bitc::MODULE_CODE_TRIPLE, M->getTargetTriple(),
323 0/*TODO*/, Stream);
324 if (!M->getDataLayout().empty())
325 WriteStringRecord(bitc::MODULE_CODE_DATALAYOUT, M->getDataLayout(),
326 0/*TODO*/, Stream);
327 if (!M->getModuleInlineAsm().empty())
328 WriteStringRecord(bitc::MODULE_CODE_ASM, M->getModuleInlineAsm(),
329 0/*TODO*/, Stream);
330
Gordon Henriksen1aed5992008-08-17 18:44:35 +0000331 // Emit information about sections and GC, computing how many there are. Also
332 // compute the maximum alignment value.
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000333 std::map<std::string, unsigned> SectionMap;
Gordon Henriksen1aed5992008-08-17 18:44:35 +0000334 std::map<std::string, unsigned> GCMap;
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000335 unsigned MaxAlignment = 0;
336 unsigned MaxGlobalType = 0;
337 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end();
338 GV != E; ++GV) {
339 MaxAlignment = std::max(MaxAlignment, GV->getAlignment());
340 MaxGlobalType = std::max(MaxGlobalType, VE.getTypeID(GV->getType()));
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000341
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000342 if (!GV->hasSection()) continue;
343 // Give section names unique ID's.
344 unsigned &Entry = SectionMap[GV->getSection()];
345 if (Entry != 0) continue;
346 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, GV->getSection(),
347 0/*TODO*/, Stream);
348 Entry = SectionMap.size();
349 }
350 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) {
351 MaxAlignment = std::max(MaxAlignment, F->getAlignment());
Gordon Henriksen13fe5e32007-12-10 03:18:06 +0000352 if (F->hasSection()) {
353 // Give section names unique ID's.
354 unsigned &Entry = SectionMap[F->getSection()];
355 if (!Entry) {
356 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, F->getSection(),
357 0/*TODO*/, Stream);
358 Entry = SectionMap.size();
359 }
360 }
Gordon Henriksen1aed5992008-08-17 18:44:35 +0000361 if (F->hasGC()) {
362 // Same for GC names.
363 unsigned &Entry = GCMap[F->getGC()];
Gordon Henriksen13fe5e32007-12-10 03:18:06 +0000364 if (!Entry) {
Gordon Henriksen1aed5992008-08-17 18:44:35 +0000365 WriteStringRecord(bitc::MODULE_CODE_GCNAME, F->getGC(),
Gordon Henriksen13fe5e32007-12-10 03:18:06 +0000366 0/*TODO*/, Stream);
Gordon Henriksen1aed5992008-08-17 18:44:35 +0000367 Entry = GCMap.size();
Gordon Henriksen13fe5e32007-12-10 03:18:06 +0000368 }
369 }
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000370 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000371
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000372 // Emit abbrev for globals, now that we know # sections and max alignment.
373 unsigned SimpleGVarAbbrev = 0;
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000374 if (!M->global_empty()) {
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000375 // Add an abbrev for common globals with no visibility or thread localness.
376 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
377 Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_GLOBALVAR));
378 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
379 Log2_32_Ceil(MaxGlobalType+1)));
380 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Constant.
381 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Initializer.
Dale Johannesend75a89e2008-05-15 20:49:28 +0000382 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // Linkage.
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000383 if (MaxAlignment == 0) // Alignment.
384 Abbv->Add(BitCodeAbbrevOp(0));
385 else {
386 unsigned MaxEncAlignment = Log2_32(MaxAlignment)+1;
387 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
388 Log2_32_Ceil(MaxEncAlignment+1)));
389 }
390 if (SectionMap.empty()) // Section.
391 Abbv->Add(BitCodeAbbrevOp(0));
392 else
393 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
394 Log2_32_Ceil(SectionMap.size()+1)));
395 // Don't bother emitting vis + thread local.
396 SimpleGVarAbbrev = Stream.EmitAbbrev(Abbv);
397 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000398
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000399 // Emit the global variable information.
400 SmallVector<unsigned, 64> Vals;
401 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end();
402 GV != E; ++GV) {
403 unsigned AbbrevToUse = 0;
404
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000405 // GLOBALVAR: [type, isconst, initid,
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000406 // linkage, alignment, section, visibility, threadlocal]
407 Vals.push_back(VE.getTypeID(GV->getType()));
408 Vals.push_back(GV->isConstant());
409 Vals.push_back(GV->isDeclaration() ? 0 :
410 (VE.getValueID(GV->getInitializer()) + 1));
411 Vals.push_back(getEncodedLinkage(GV));
412 Vals.push_back(Log2_32(GV->getAlignment())+1);
413 Vals.push_back(GV->hasSection() ? SectionMap[GV->getSection()] : 0);
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000414 if (GV->isThreadLocal() ||
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000415 GV->getVisibility() != GlobalValue::DefaultVisibility) {
416 Vals.push_back(getEncodedVisibility(GV));
417 Vals.push_back(GV->isThreadLocal());
418 } else {
419 AbbrevToUse = SimpleGVarAbbrev;
420 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000421
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000422 Stream.EmitRecord(bitc::MODULE_CODE_GLOBALVAR, Vals, AbbrevToUse);
423 Vals.clear();
424 }
425
426 // Emit the function proto information.
427 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) {
Duncan Sandsf5588dc2007-11-27 13:23:08 +0000428 // FUNCTION: [type, callingconv, isproto, paramattr,
Gordon Henriksen1aed5992008-08-17 18:44:35 +0000429 // linkage, alignment, section, visibility, gc]
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000430 Vals.push_back(VE.getTypeID(F->getType()));
431 Vals.push_back(F->getCallingConv());
432 Vals.push_back(F->isDeclaration());
433 Vals.push_back(getEncodedLinkage(F));
Devang Pateld222f862008-09-25 21:00:45 +0000434 Vals.push_back(VE.getAttributeID(F->getAttributes()));
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000435 Vals.push_back(Log2_32(F->getAlignment())+1);
436 Vals.push_back(F->hasSection() ? SectionMap[F->getSection()] : 0);
437 Vals.push_back(getEncodedVisibility(F));
Gordon Henriksen1aed5992008-08-17 18:44:35 +0000438 Vals.push_back(F->hasGC() ? GCMap[F->getGC()] : 0);
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000439
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000440 unsigned AbbrevToUse = 0;
441 Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse);
442 Vals.clear();
443 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000444
445
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000446 // Emit the alias information.
447 for (Module::const_alias_iterator AI = M->alias_begin(), E = M->alias_end();
448 AI != E; ++AI) {
449 Vals.push_back(VE.getTypeID(AI->getType()));
450 Vals.push_back(VE.getValueID(AI->getAliasee()));
451 Vals.push_back(getEncodedLinkage(AI));
Anton Korobeynikov902a0112008-03-11 21:40:17 +0000452 Vals.push_back(getEncodedVisibility(AI));
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000453 unsigned AbbrevToUse = 0;
454 Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals, AbbrevToUse);
455 Vals.clear();
456 }
457}
458
Dan Gohman799a8c82009-07-20 21:19:07 +0000459static uint64_t GetOptimizationFlags(const Value *V) {
460 uint64_t Flags = 0;
461
462 if (const OverflowingBinaryOperator *OBO =
463 dyn_cast<OverflowingBinaryOperator>(V)) {
Dan Gohmanb5ed4492009-08-20 17:11:38 +0000464 if (OBO->hasNoSignedWrap())
465 Flags |= 1 << bitc::OBO_NO_SIGNED_WRAP;
466 if (OBO->hasNoUnsignedWrap())
467 Flags |= 1 << bitc::OBO_NO_UNSIGNED_WRAP;
Dan Gohman799a8c82009-07-20 21:19:07 +0000468 } else if (const SDivOperator *Div = dyn_cast<SDivOperator>(V)) {
469 if (Div->isExact())
470 Flags |= 1 << bitc::SDIV_EXACT;
471 }
472
473 return Flags;
474}
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000475
Devang Patel765e2162009-08-04 05:01:35 +0000476static void WriteMDNode(const MDNode *N,
Devang Patel573d0152009-07-29 18:15:02 +0000477 const ValueEnumerator &VE,
Devang Patel765e2162009-08-04 05:01:35 +0000478 BitstreamWriter &Stream,
479 SmallVector<uint64_t, 64> &Record) {
480 for (unsigned i = 0, e = N->getNumElements(); i != e; ++i) {
481 if (N->getElement(i)) {
482 Record.push_back(VE.getTypeID(N->getElement(i)->getType()));
483 Record.push_back(VE.getValueID(N->getElement(i)));
484 } else {
Owen Anderson35b47072009-08-13 21:58:54 +0000485 Record.push_back(VE.getTypeID(Type::getVoidTy(N->getContext())));
Devang Patel765e2162009-08-04 05:01:35 +0000486 Record.push_back(0);
487 }
488 }
489 Stream.EmitRecord(bitc::METADATA_NODE, Record, 0);
490 Record.clear();
491}
Devang Patel54199ef2009-07-23 01:07:34 +0000492
Devang Patel765e2162009-08-04 05:01:35 +0000493static void WriteModuleMetadata(const ValueEnumerator &VE,
494 BitstreamWriter &Stream) {
Devang Patelea27c232009-08-04 06:00:18 +0000495 const ValueEnumerator::ValueList &Vals = VE.getMDValues();
Devang Patel765e2162009-08-04 05:01:35 +0000496 bool StartedMetadataBlock = false;
497 unsigned MDSAbbrev = 0;
498 SmallVector<uint64_t, 64> Record;
499 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000500
Devang Patel765e2162009-08-04 05:01:35 +0000501 if (const MDNode *N = dyn_cast<MDNode>(Vals[i].first)) {
502 if (!StartedMetadataBlock) {
Devang Patel38401dd2009-08-04 02:26:56 +0000503 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
Devang Patel765e2162009-08-04 05:01:35 +0000504 StartedMetadataBlock = true;
505 }
506 WriteMDNode(N, VE, Stream, Record);
507 } else if (const MDString *MDS = dyn_cast<MDString>(Vals[i].first)) {
508 if (!StartedMetadataBlock) {
509 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000510
Devang Patel5fa5d4f2009-07-22 21:10:50 +0000511 // Abbrev for METADATA_STRING.
512 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
513 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRING));
Devang Patel0c0a6ca2009-07-22 17:43:22 +0000514 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Devang Patel5fa5d4f2009-07-22 21:10:50 +0000515 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
516 MDSAbbrev = Stream.EmitAbbrev(Abbv);
Devang Patel765e2162009-08-04 05:01:35 +0000517 StartedMetadataBlock = true;
Devang Patel573d0152009-07-29 18:15:02 +0000518 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000519
Devang Patel573d0152009-07-29 18:15:02 +0000520 // Code: [strchar x N]
Chris Lattnerdd0729d2009-10-19 05:51:03 +0000521 Record.append(MDS->begin(), MDS->end());
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000522
Devang Patel573d0152009-07-29 18:15:02 +0000523 // Emit the finished record.
Devang Patel54199ef2009-07-23 01:07:34 +0000524 Stream.EmitRecord(bitc::METADATA_STRING, Record, MDSAbbrev);
525 Record.clear();
Devang Patel765e2162009-08-04 05:01:35 +0000526 } else if (const NamedMDNode *NMD = dyn_cast<NamedMDNode>(Vals[i].first)) {
527 if (!StartedMetadataBlock) {
528 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
529 StartedMetadataBlock = true;
Devang Patel3e1ef932009-07-29 22:34:41 +0000530 }
Devang Patel765e2162009-08-04 05:01:35 +0000531
Devang Patel3e1ef932009-07-29 22:34:41 +0000532 // Write name.
Devang Patelde865ff2009-07-30 23:06:35 +0000533 std::string Str = NMD->getNameStr();
534 const char *StrBegin = Str.c_str();
535 for (unsigned i = 0, e = Str.length(); i != e; ++i)
Devang Patel3e1ef932009-07-29 22:34:41 +0000536 Record.push_back(StrBegin[i]);
Devang Patelde865ff2009-07-30 23:06:35 +0000537 Stream.EmitRecord(bitc::METADATA_NAME, Record, 0/*TODO*/);
Devang Patel3e1ef932009-07-29 22:34:41 +0000538 Record.clear();
Devang Patel765e2162009-08-04 05:01:35 +0000539
Devang Patel3e1ef932009-07-29 22:34:41 +0000540 // Write named metadata elements.
541 for (unsigned i = 0, e = NMD->getNumElements(); i != e; ++i) {
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000542 if (NMD->getElement(i))
Devang Patel3e1ef932009-07-29 22:34:41 +0000543 Record.push_back(VE.getValueID(NMD->getElement(i)));
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000544 else
Devang Patel3e1ef932009-07-29 22:34:41 +0000545 Record.push_back(0);
546 }
547 Stream.EmitRecord(bitc::METADATA_NAMED_NODE, Record, 0);
548 Record.clear();
Devang Patel765e2162009-08-04 05:01:35 +0000549 }
550 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000551
Devang Patel765e2162009-08-04 05:01:35 +0000552 if (StartedMetadataBlock)
Devang Pateladc37612009-09-18 19:26:43 +0000553 Stream.ExitBlock();
554}
555
556static void WriteMetadataAttachment(const Function &F,
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000557 const ValueEnumerator &VE,
558 BitstreamWriter &Stream) {
Devang Pateladc37612009-09-18 19:26:43 +0000559 bool StartedMetadataBlock = false;
560 SmallVector<uint64_t, 64> Record;
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000561
Devang Pateladc37612009-09-18 19:26:43 +0000562 // Write metadata attachments
563 // METADATA_ATTACHMENT - [m x [value, [n x [id, mdnode]]]
Devang Patel6de78e22009-09-28 21:41:20 +0000564 MetadataContext &TheMetadata = F.getContext().getMetadata();
Chris Lattner1b6d97f2009-12-28 08:14:54 +0000565 typedef SmallVector<std::pair<unsigned, MDNode*>, 2> MDMapTy;
Devang Patel0f6f8942009-10-22 18:55:16 +0000566 MDMapTy MDs;
Devang Pateladc37612009-09-18 19:26:43 +0000567 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
568 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
569 I != E; ++I) {
Devang Patel0f6f8942009-10-22 18:55:16 +0000570 MDs.clear();
571 TheMetadata.getMDs(I, MDs);
Devang Pateladc37612009-09-18 19:26:43 +0000572 bool RecordedInstruction = false;
Devang Patel0f6f8942009-10-22 18:55:16 +0000573 for (MDMapTy::const_iterator PI = MDs.begin(), PE = MDs.end();
574 PI != PE; ++PI) {
Devang Patel0aa30042009-10-22 18:25:28 +0000575 if (RecordedInstruction == false) {
576 Record.push_back(VE.getInstructionID(I));
577 RecordedInstruction = true;
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000578 }
Devang Patel0aa30042009-10-22 18:25:28 +0000579 Record.push_back(PI->first);
580 Record.push_back(VE.getValueID(PI->second));
Devang Pateladc37612009-09-18 19:26:43 +0000581 }
Devang Patel872bc632009-10-13 18:51:28 +0000582 if (!Record.empty()) {
583 if (!StartedMetadataBlock) {
584 Stream.EnterSubblock(bitc::METADATA_ATTACHMENT_ID, 3);
585 StartedMetadataBlock = true;
586 }
587 Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0);
588 Record.clear();
Devang Pateladc37612009-09-18 19:26:43 +0000589 }
Devang Pateladc37612009-09-18 19:26:43 +0000590 }
591
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000592 if (StartedMetadataBlock)
Devang Pateladc37612009-09-18 19:26:43 +0000593 Stream.ExitBlock();
594}
595
Chris Lattnere5bb39b2009-12-28 20:10:43 +0000596static void WriteModuleMetadataStore(const Module *M, BitstreamWriter &Stream) {
Devang Pateladc37612009-09-18 19:26:43 +0000597 SmallVector<uint64_t, 64> Record;
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000598
Devang Pateladc37612009-09-18 19:26:43 +0000599 // Write metadata kinds
600 // METADATA_KIND - [n x [id, name]]
Devang Patel6de78e22009-09-28 21:41:20 +0000601 MetadataContext &TheMetadata = M->getContext().getMetadata();
Chris Lattnere5bb39b2009-12-28 20:10:43 +0000602 SmallVector<StringRef, 4> Names;
603 TheMetadata.getMDKindNames(Names);
604
605 assert(Names[0] == "" && "MDKind #0 is invalid");
606 if (Names.size() == 1) return;
607
608 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
609
610 for (unsigned MDKindID = 1, e = Names.size(); MDKindID != e; ++MDKindID) {
611 Record.push_back(MDKindID);
612 StringRef KName = Names[MDKindID];
613 Record.append(KName.begin(), KName.end());
614
Devang Pateladc37612009-09-18 19:26:43 +0000615 Stream.EmitRecord(bitc::METADATA_KIND, Record, 0);
616 Record.clear();
617 }
618
Chris Lattnere5bb39b2009-12-28 20:10:43 +0000619 Stream.ExitBlock();
Devang Patel765e2162009-08-04 05:01:35 +0000620}
621
622static void WriteConstants(unsigned FirstVal, unsigned LastVal,
623 const ValueEnumerator &VE,
624 BitstreamWriter &Stream, bool isGlobal) {
625 if (FirstVal == LastVal) return;
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000626
Devang Patel765e2162009-08-04 05:01:35 +0000627 Stream.EnterSubblock(bitc::CONSTANTS_BLOCK_ID, 4);
628
629 unsigned AggregateAbbrev = 0;
630 unsigned String8Abbrev = 0;
631 unsigned CString7Abbrev = 0;
632 unsigned CString6Abbrev = 0;
633 // If this is a constant pool for the module, emit module-specific abbrevs.
634 if (isGlobal) {
635 // Abbrev for CST_CODE_AGGREGATE.
636 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
637 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_AGGREGATE));
638 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
639 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, Log2_32_Ceil(LastVal+1)));
640 AggregateAbbrev = Stream.EmitAbbrev(Abbv);
641
642 // Abbrev for CST_CODE_STRING.
643 Abbv = new BitCodeAbbrev();
644 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_STRING));
645 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
646 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
647 String8Abbrev = Stream.EmitAbbrev(Abbv);
648 // Abbrev for CST_CODE_CSTRING.
649 Abbv = new BitCodeAbbrev();
650 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
651 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
652 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
653 CString7Abbrev = Stream.EmitAbbrev(Abbv);
654 // Abbrev for CST_CODE_CSTRING.
655 Abbv = new BitCodeAbbrev();
656 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
657 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
658 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
659 CString6Abbrev = Stream.EmitAbbrev(Abbv);
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000660 }
661
Devang Patel765e2162009-08-04 05:01:35 +0000662 SmallVector<uint64_t, 64> Record;
663
664 const ValueEnumerator::ValueList &Vals = VE.getValues();
665 const Type *LastTy = 0;
666 for (unsigned i = FirstVal; i != LastVal; ++i) {
667 const Value *V = Vals[i].first;
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000668 // If we need to switch types, do so now.
669 if (V->getType() != LastTy) {
670 LastTy = V->getType();
671 Record.push_back(VE.getTypeID(LastTy));
672 Stream.EmitRecord(bitc::CST_CODE_SETTYPE, Record,
673 CONSTANTS_SETTYPE_ABBREV);
674 Record.clear();
675 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000676
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000677 if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
Dale Johannesen2477bfe2009-10-13 20:46:56 +0000678 Record.push_back(unsigned(IA->hasSideEffects()) |
Dale Johannesen5ee3e4b2009-10-21 23:28:00 +0000679 unsigned(IA->isAlignStack()) << 1);
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000680
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000681 // Add the asm string.
682 const std::string &AsmStr = IA->getAsmString();
683 Record.push_back(AsmStr.size());
684 for (unsigned i = 0, e = AsmStr.size(); i != e; ++i)
685 Record.push_back(AsmStr[i]);
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000686
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000687 // Add the constraint string.
688 const std::string &ConstraintStr = IA->getConstraintString();
689 Record.push_back(ConstraintStr.size());
690 for (unsigned i = 0, e = ConstraintStr.size(); i != e; ++i)
691 Record.push_back(ConstraintStr[i]);
692 Stream.EmitRecord(bitc::CST_CODE_INLINEASM, Record);
693 Record.clear();
694 continue;
695 }
696 const Constant *C = cast<Constant>(V);
697 unsigned Code = -1U;
698 unsigned AbbrevToUse = 0;
699 if (C->isNullValue()) {
700 Code = bitc::CST_CODE_NULL;
701 } else if (isa<UndefValue>(C)) {
702 Code = bitc::CST_CODE_UNDEF;
703 } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) {
704 if (IV->getBitWidth() <= 64) {
705 int64_t V = IV->getSExtValue();
706 if (V >= 0)
707 Record.push_back(V << 1);
708 else
709 Record.push_back((-V << 1) | 1);
710 Code = bitc::CST_CODE_INTEGER;
711 AbbrevToUse = CONSTANTS_INTEGER_ABBREV;
712 } else { // Wide integers, > 64 bits in size.
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000713 // We have an arbitrary precision integer value to write whose
714 // bit width is > 64. However, in canonical unsigned integer
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000715 // format it is likely that the high bits are going to be zero.
716 // So, we only write the number of active words.
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000717 unsigned NWords = IV->getValue().getActiveWords();
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000718 const uint64_t *RawWords = IV->getValue().getRawData();
719 for (unsigned i = 0; i != NWords; ++i) {
720 int64_t V = RawWords[i];
721 if (V >= 0)
722 Record.push_back(V << 1);
723 else
724 Record.push_back((-V << 1) | 1);
725 }
726 Code = bitc::CST_CODE_WIDE_INTEGER;
727 }
728 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
729 Code = bitc::CST_CODE_FLOAT;
Dale Johannesene617f912007-08-09 22:51:36 +0000730 const Type *Ty = CFP->getType();
Chris Lattner82cdc062009-10-05 05:54:46 +0000731 if (Ty->isFloatTy() || Ty->isDoubleTy()) {
Dale Johannesen49cc7ce2008-10-09 18:53:47 +0000732 Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
Chris Lattner82cdc062009-10-05 05:54:46 +0000733 } else if (Ty->isX86_FP80Ty()) {
Dale Johannesen693aa822007-09-26 23:20:33 +0000734 // api needed to prevent premature destruction
Dale Johannesen0a92eac2009-03-23 21:16:53 +0000735 // bits are not in the same order as a normal i80 APInt, compensate.
Dale Johannesen49cc7ce2008-10-09 18:53:47 +0000736 APInt api = CFP->getValueAPF().bitcastToAPInt();
Dale Johannesen693aa822007-09-26 23:20:33 +0000737 const uint64_t *p = api.getRawData();
Dale Johannesen0a92eac2009-03-23 21:16:53 +0000738 Record.push_back((p[1] << 48) | (p[0] >> 16));
739 Record.push_back(p[0] & 0xffffLL);
Chris Lattner82cdc062009-10-05 05:54:46 +0000740 } else if (Ty->isFP128Ty() || Ty->isPPC_FP128Ty()) {
Dale Johannesen49cc7ce2008-10-09 18:53:47 +0000741 APInt api = CFP->getValueAPF().bitcastToAPInt();
Dale Johannesen693aa822007-09-26 23:20:33 +0000742 const uint64_t *p = api.getRawData();
Dale Johannesen1616e902007-09-11 18:32:33 +0000743 Record.push_back(p[0]);
744 Record.push_back(p[1]);
Dale Johannesene617f912007-08-09 22:51:36 +0000745 } else {
746 assert (0 && "Unknown FP type!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000747 }
748 } else if (isa<ConstantArray>(C) && cast<ConstantArray>(C)->isString()) {
Chris Lattner67abb532009-10-28 05:14:34 +0000749 const ConstantArray *CA = cast<ConstantArray>(C);
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000750 // Emit constant strings specially.
Chris Lattner67abb532009-10-28 05:14:34 +0000751 unsigned NumOps = CA->getNumOperands();
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000752 // If this is a null-terminated string, use the denser CSTRING encoding.
Chris Lattner67abb532009-10-28 05:14:34 +0000753 if (CA->getOperand(NumOps-1)->isNullValue()) {
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000754 Code = bitc::CST_CODE_CSTRING;
755 --NumOps; // Don't encode the null, which isn't allowed by char6.
756 } else {
757 Code = bitc::CST_CODE_STRING;
758 AbbrevToUse = String8Abbrev;
759 }
760 bool isCStr7 = Code == bitc::CST_CODE_CSTRING;
761 bool isCStrChar6 = Code == bitc::CST_CODE_CSTRING;
762 for (unsigned i = 0; i != NumOps; ++i) {
Chris Lattner67abb532009-10-28 05:14:34 +0000763 unsigned char V = cast<ConstantInt>(CA->getOperand(i))->getZExtValue();
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000764 Record.push_back(V);
765 isCStr7 &= (V & 128) == 0;
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000766 if (isCStrChar6)
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000767 isCStrChar6 = BitCodeAbbrevOp::isChar6(V);
768 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000769
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000770 if (isCStrChar6)
771 AbbrevToUse = CString6Abbrev;
772 else if (isCStr7)
773 AbbrevToUse = CString7Abbrev;
774 } else if (isa<ConstantArray>(C) || isa<ConstantStruct>(V) ||
775 isa<ConstantVector>(V)) {
776 Code = bitc::CST_CODE_AGGREGATE;
777 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i)
778 Record.push_back(VE.getValueID(C->getOperand(i)));
779 AbbrevToUse = AggregateAbbrev;
780 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
781 switch (CE->getOpcode()) {
782 default:
783 if (Instruction::isCast(CE->getOpcode())) {
784 Code = bitc::CST_CODE_CE_CAST;
785 Record.push_back(GetEncodedCastOpcode(CE->getOpcode()));
786 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
787 Record.push_back(VE.getValueID(C->getOperand(0)));
788 AbbrevToUse = CONSTANTS_CE_CAST_Abbrev;
789 } else {
790 assert(CE->getNumOperands() == 2 && "Unknown constant expr!");
791 Code = bitc::CST_CODE_CE_BINOP;
792 Record.push_back(GetEncodedBinaryOpcode(CE->getOpcode()));
793 Record.push_back(VE.getValueID(C->getOperand(0)));
794 Record.push_back(VE.getValueID(C->getOperand(1)));
Dan Gohman799a8c82009-07-20 21:19:07 +0000795 uint64_t Flags = GetOptimizationFlags(CE);
796 if (Flags != 0)
797 Record.push_back(Flags);
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000798 }
799 break;
800 case Instruction::GetElementPtr:
801 Code = bitc::CST_CODE_CE_GEP;
Dan Gohman106b2ae2009-07-27 21:53:46 +0000802 if (cast<GEPOperator>(C)->isInBounds())
803 Code = bitc::CST_CODE_CE_INBOUNDS_GEP;
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000804 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) {
805 Record.push_back(VE.getTypeID(C->getOperand(i)->getType()));
806 Record.push_back(VE.getValueID(C->getOperand(i)));
807 }
808 break;
809 case Instruction::Select:
810 Code = bitc::CST_CODE_CE_SELECT;
811 Record.push_back(VE.getValueID(C->getOperand(0)));
812 Record.push_back(VE.getValueID(C->getOperand(1)));
813 Record.push_back(VE.getValueID(C->getOperand(2)));
814 break;
815 case Instruction::ExtractElement:
816 Code = bitc::CST_CODE_CE_EXTRACTELT;
817 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
818 Record.push_back(VE.getValueID(C->getOperand(0)));
819 Record.push_back(VE.getValueID(C->getOperand(1)));
820 break;
821 case Instruction::InsertElement:
822 Code = bitc::CST_CODE_CE_INSERTELT;
823 Record.push_back(VE.getValueID(C->getOperand(0)));
824 Record.push_back(VE.getValueID(C->getOperand(1)));
825 Record.push_back(VE.getValueID(C->getOperand(2)));
826 break;
827 case Instruction::ShuffleVector:
Nate Begemand6d715b2009-02-12 21:28:33 +0000828 // If the return type and argument types are the same, this is a
829 // standard shufflevector instruction. If the types are different,
830 // then the shuffle is widening or truncating the input vectors, and
831 // the argument type must also be encoded.
832 if (C->getType() == C->getOperand(0)->getType()) {
833 Code = bitc::CST_CODE_CE_SHUFFLEVEC;
834 } else {
835 Code = bitc::CST_CODE_CE_SHUFVEC_EX;
836 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
837 }
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000838 Record.push_back(VE.getValueID(C->getOperand(0)));
839 Record.push_back(VE.getValueID(C->getOperand(1)));
840 Record.push_back(VE.getValueID(C->getOperand(2)));
841 break;
842 case Instruction::ICmp:
843 case Instruction::FCmp:
Nick Lewycky8f5253b2009-07-08 03:04:38 +0000844 Code = bitc::CST_CODE_CE_CMP;
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000845 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
846 Record.push_back(VE.getValueID(C->getOperand(0)));
847 Record.push_back(VE.getValueID(C->getOperand(1)));
848 Record.push_back(CE->getPredicate());
849 break;
850 }
Chris Lattnerd5693a22009-10-28 05:24:40 +0000851 } else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C)) {
Chris Lattner620cead2009-11-01 01:27:45 +0000852 assert(BA->getFunction() == BA->getBasicBlock()->getParent() &&
Chris Lattnerd5693a22009-10-28 05:24:40 +0000853 "Malformed blockaddress");
854 Code = bitc::CST_CODE_BLOCKADDRESS;
855 Record.push_back(VE.getTypeID(BA->getFunction()->getType()));
856 Record.push_back(VE.getValueID(BA->getFunction()));
857 Record.push_back(VE.getGlobalBasicBlockID(BA->getBasicBlock()));
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000858 } else {
Edwin Törökbd448e32009-07-14 16:55:14 +0000859 llvm_unreachable("Unknown constant!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000860 }
861 Stream.EmitRecord(Code, Record, AbbrevToUse);
862 Record.clear();
863 }
864
865 Stream.ExitBlock();
866}
867
868static void WriteModuleConstants(const ValueEnumerator &VE,
869 BitstreamWriter &Stream) {
870 const ValueEnumerator::ValueList &Vals = VE.getValues();
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000871
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000872 // Find the first constant to emit, which is the first non-globalvalue value.
873 // We know globalvalues have been emitted by WriteModuleInfo.
874 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
875 if (!isa<GlobalValue>(Vals[i].first)) {
Devang Patel765e2162009-08-04 05:01:35 +0000876 WriteConstants(i, Vals.size(), VE, Stream, true);
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000877 return;
878 }
879 }
880}
881
882/// PushValueAndType - The file has to encode both the value and type id for
883/// many values, because we need to know what type to create for forward
884/// references. However, most operands are not forward references, so this type
885/// field is not needed.
886///
887/// This function adds V's value ID to Vals. If the value ID is higher than the
888/// instruction ID, then it is a forward reference, and it also includes the
889/// type ID.
Gabor Greif6afcb032009-01-16 18:40:27 +0000890static bool PushValueAndType(const Value *V, unsigned InstID,
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000891 SmallVector<unsigned, 64> &Vals,
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000892 ValueEnumerator &VE) {
893 unsigned ValID = VE.getValueID(V);
894 Vals.push_back(ValID);
895 if (ValID >= InstID) {
896 Vals.push_back(VE.getTypeID(V->getType()));
897 return true;
898 }
899 return false;
900}
901
902/// WriteInstruction - Emit an instruction to the specified stream.
903static void WriteInstruction(const Instruction &I, unsigned InstID,
904 ValueEnumerator &VE, BitstreamWriter &Stream,
905 SmallVector<unsigned, 64> &Vals) {
906 unsigned Code = 0;
907 unsigned AbbrevToUse = 0;
Devang Pateladc37612009-09-18 19:26:43 +0000908 VE.setInstructionID(&I);
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000909 switch (I.getOpcode()) {
910 default:
911 if (Instruction::isCast(I.getOpcode())) {
912 Code = bitc::FUNC_CODE_INST_CAST;
913 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
914 AbbrevToUse = FUNCTION_INST_CAST_ABBREV;
915 Vals.push_back(VE.getTypeID(I.getType()));
916 Vals.push_back(GetEncodedCastOpcode(I.getOpcode()));
917 } else {
918 assert(isa<BinaryOperator>(I) && "Unknown instruction!");
919 Code = bitc::FUNC_CODE_INST_BINOP;
920 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
921 AbbrevToUse = FUNCTION_INST_BINOP_ABBREV;
922 Vals.push_back(VE.getValueID(I.getOperand(1)));
923 Vals.push_back(GetEncodedBinaryOpcode(I.getOpcode()));
Dan Gohman799a8c82009-07-20 21:19:07 +0000924 uint64_t Flags = GetOptimizationFlags(&I);
925 if (Flags != 0) {
926 if (AbbrevToUse == FUNCTION_INST_BINOP_ABBREV)
927 AbbrevToUse = FUNCTION_INST_BINOP_FLAGS_ABBREV;
928 Vals.push_back(Flags);
929 }
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000930 }
931 break;
932
933 case Instruction::GetElementPtr:
934 Code = bitc::FUNC_CODE_INST_GEP;
Dan Gohman106b2ae2009-07-27 21:53:46 +0000935 if (cast<GEPOperator>(&I)->isInBounds())
936 Code = bitc::FUNC_CODE_INST_INBOUNDS_GEP;
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000937 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
938 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
939 break;
Dan Gohmanaa91c1d2008-05-31 19:11:15 +0000940 case Instruction::ExtractValue: {
Dan Gohmane6b1ee62008-05-23 01:55:30 +0000941 Code = bitc::FUNC_CODE_INST_EXTRACTVAL;
Dan Gohmanaa91c1d2008-05-31 19:11:15 +0000942 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
943 const ExtractValueInst *EVI = cast<ExtractValueInst>(&I);
944 for (const unsigned *i = EVI->idx_begin(), *e = EVI->idx_end(); i != e; ++i)
945 Vals.push_back(*i);
Dan Gohmane6b1ee62008-05-23 01:55:30 +0000946 break;
Dan Gohmanaa91c1d2008-05-31 19:11:15 +0000947 }
948 case Instruction::InsertValue: {
Dan Gohmane6b1ee62008-05-23 01:55:30 +0000949 Code = bitc::FUNC_CODE_INST_INSERTVAL;
Dan Gohmanaa91c1d2008-05-31 19:11:15 +0000950 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
951 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
952 const InsertValueInst *IVI = cast<InsertValueInst>(&I);
953 for (const unsigned *i = IVI->idx_begin(), *e = IVI->idx_end(); i != e; ++i)
954 Vals.push_back(*i);
Dan Gohmane6b1ee62008-05-23 01:55:30 +0000955 break;
Dan Gohmanaa91c1d2008-05-31 19:11:15 +0000956 }
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000957 case Instruction::Select:
Dan Gohman6fa5bce2008-09-16 01:01:33 +0000958 Code = bitc::FUNC_CODE_INST_VSELECT;
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000959 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
960 Vals.push_back(VE.getValueID(I.getOperand(2)));
Dan Gohman6fa5bce2008-09-16 01:01:33 +0000961 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000962 break;
963 case Instruction::ExtractElement:
964 Code = bitc::FUNC_CODE_INST_EXTRACTELT;
965 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
966 Vals.push_back(VE.getValueID(I.getOperand(1)));
967 break;
968 case Instruction::InsertElement:
969 Code = bitc::FUNC_CODE_INST_INSERTELT;
970 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
971 Vals.push_back(VE.getValueID(I.getOperand(1)));
972 Vals.push_back(VE.getValueID(I.getOperand(2)));
973 break;
974 case Instruction::ShuffleVector:
975 Code = bitc::FUNC_CODE_INST_SHUFFLEVEC;
976 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
977 Vals.push_back(VE.getValueID(I.getOperand(1)));
978 Vals.push_back(VE.getValueID(I.getOperand(2)));
979 break;
980 case Instruction::ICmp:
981 case Instruction::FCmp:
Nick Lewycky8f5253b2009-07-08 03:04:38 +0000982 // compare returning Int1Ty or vector of Int1Ty
983 Code = bitc::FUNC_CODE_INST_CMP2;
Dan Gohmanf17a25c2007-07-18 16:29:46 +0000984 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
985 Vals.push_back(VE.getValueID(I.getOperand(1)));
986 Vals.push_back(cast<CmpInst>(I).getPredicate());
987 break;
988
Daniel Dunbar3be44e62009-09-20 02:20:51 +0000989 case Instruction::Ret:
Devang Patelb7fbc8b2008-02-26 01:29:32 +0000990 {
991 Code = bitc::FUNC_CODE_INST_RET;
992 unsigned NumOperands = I.getNumOperands();
Devang Patelb7fbc8b2008-02-26 01:29:32 +0000993 if (NumOperands == 0)
994 AbbrevToUse = FUNCTION_INST_RET_VOID_ABBREV;
995 else if (NumOperands == 1) {
996 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
997 AbbrevToUse = FUNCTION_INST_RET_VAL_ABBREV;
998 } else {
999 for (unsigned i = 0, e = NumOperands; i != e; ++i)
1000 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
1001 }
1002 }
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001003 break;
1004 case Instruction::Br:
Gabor Greif7d9f7e52009-01-30 18:27:21 +00001005 {
1006 Code = bitc::FUNC_CODE_INST_BR;
Chris Lattnere0787282009-10-27 19:13:16 +00001007 BranchInst &II = cast<BranchInst>(I);
Gabor Greif7d9f7e52009-01-30 18:27:21 +00001008 Vals.push_back(VE.getValueID(II.getSuccessor(0)));
1009 if (II.isConditional()) {
1010 Vals.push_back(VE.getValueID(II.getSuccessor(1)));
1011 Vals.push_back(VE.getValueID(II.getCondition()));
1012 }
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001013 }
1014 break;
1015 case Instruction::Switch:
1016 Code = bitc::FUNC_CODE_INST_SWITCH;
1017 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
1018 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
1019 Vals.push_back(VE.getValueID(I.getOperand(i)));
1020 break;
Chris Lattner4c3800f2009-10-28 00:19:10 +00001021 case Instruction::IndirectBr:
1022 Code = bitc::FUNC_CODE_INST_INDIRECTBR;
Chris Lattnere0787282009-10-27 19:13:16 +00001023 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
1024 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
1025 Vals.push_back(VE.getValueID(I.getOperand(i)));
1026 break;
1027
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001028 case Instruction::Invoke: {
Gabor Greif6afcb032009-01-16 18:40:27 +00001029 const InvokeInst *II = cast<InvokeInst>(&I);
1030 const Value *Callee(II->getCalledValue());
1031 const PointerType *PTy = cast<PointerType>(Callee->getType());
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001032 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
1033 Code = bitc::FUNC_CODE_INST_INVOKE;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001034
Devang Pateld222f862008-09-25 21:00:45 +00001035 Vals.push_back(VE.getAttributeID(II->getAttributes()));
Duncan Sandsf5588dc2007-11-27 13:23:08 +00001036 Vals.push_back(II->getCallingConv());
Gabor Greif2494e312009-01-07 22:39:29 +00001037 Vals.push_back(VE.getValueID(II->getNormalDest()));
1038 Vals.push_back(VE.getValueID(II->getUnwindDest()));
Gabor Greif6afcb032009-01-16 18:40:27 +00001039 PushValueAndType(Callee, InstID, Vals, VE);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001040
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001041 // Emit value #'s for the fixed parameters.
1042 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
Gabor Greif5a6b6b42009-09-03 02:02:59 +00001043 Vals.push_back(VE.getValueID(I.getOperand(i+3))); // fixed param.
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001044
1045 // Emit type/value pairs for varargs params.
1046 if (FTy->isVarArg()) {
Gabor Greif5a6b6b42009-09-03 02:02:59 +00001047 for (unsigned i = 3+FTy->getNumParams(), e = I.getNumOperands();
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001048 i != e; ++i)
1049 PushValueAndType(I.getOperand(i), InstID, Vals, VE); // vararg
1050 }
1051 break;
1052 }
1053 case Instruction::Unwind:
1054 Code = bitc::FUNC_CODE_INST_UNWIND;
1055 break;
1056 case Instruction::Unreachable:
1057 Code = bitc::FUNC_CODE_INST_UNREACHABLE;
1058 AbbrevToUse = FUNCTION_INST_UNREACHABLE_ABBREV;
1059 break;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001060
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001061 case Instruction::PHI:
1062 Code = bitc::FUNC_CODE_INST_PHI;
1063 Vals.push_back(VE.getTypeID(I.getType()));
1064 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
1065 Vals.push_back(VE.getValueID(I.getOperand(i)));
1066 break;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001067
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001068 case Instruction::Alloca:
1069 Code = bitc::FUNC_CODE_INST_ALLOCA;
1070 Vals.push_back(VE.getTypeID(I.getType()));
1071 Vals.push_back(VE.getValueID(I.getOperand(0))); // size.
1072 Vals.push_back(Log2_32(cast<AllocaInst>(I).getAlignment())+1);
1073 break;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001074
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001075 case Instruction::Load:
1076 Code = bitc::FUNC_CODE_INST_LOAD;
1077 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) // ptr
1078 AbbrevToUse = FUNCTION_INST_LOAD_ABBREV;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001079
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001080 Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1);
1081 Vals.push_back(cast<LoadInst>(I).isVolatile());
1082 break;
1083 case Instruction::Store:
Christopher Lamb44d62f62007-12-11 08:59:05 +00001084 Code = bitc::FUNC_CODE_INST_STORE2;
1085 PushValueAndType(I.getOperand(1), InstID, Vals, VE); // ptrty + ptr
1086 Vals.push_back(VE.getValueID(I.getOperand(0))); // val.
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001087 Vals.push_back(Log2_32(cast<StoreInst>(I).getAlignment())+1);
1088 Vals.push_back(cast<StoreInst>(I).isVolatile());
1089 break;
1090 case Instruction::Call: {
1091 const PointerType *PTy = cast<PointerType>(I.getOperand(0)->getType());
1092 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
1093
1094 Code = bitc::FUNC_CODE_INST_CALL;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001095
Duncan Sandsf5588dc2007-11-27 13:23:08 +00001096 const CallInst *CI = cast<CallInst>(&I);
Devang Pateld222f862008-09-25 21:00:45 +00001097 Vals.push_back(VE.getAttributeID(CI->getAttributes()));
Duncan Sandsf5588dc2007-11-27 13:23:08 +00001098 Vals.push_back((CI->getCallingConv() << 1) | unsigned(CI->isTailCall()));
1099 PushValueAndType(CI->getOperand(0), InstID, Vals, VE); // Callee
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001100
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001101 // Emit value #'s for the fixed parameters.
1102 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1103 Vals.push_back(VE.getValueID(I.getOperand(i+1))); // fixed param.
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001104
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001105 // Emit type/value pairs for varargs params.
1106 if (FTy->isVarArg()) {
1107 unsigned NumVarargs = I.getNumOperands()-1-FTy->getNumParams();
1108 for (unsigned i = I.getNumOperands()-NumVarargs, e = I.getNumOperands();
1109 i != e; ++i)
1110 PushValueAndType(I.getOperand(i), InstID, Vals, VE); // varargs
1111 }
1112 break;
1113 }
1114 case Instruction::VAArg:
1115 Code = bitc::FUNC_CODE_INST_VAARG;
1116 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); // valistty
1117 Vals.push_back(VE.getValueID(I.getOperand(0))); // valist.
1118 Vals.push_back(VE.getTypeID(I.getType())); // restype.
1119 break;
1120 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001121
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001122 Stream.EmitRecord(Code, Vals, AbbrevToUse);
1123 Vals.clear();
1124}
1125
1126// Emit names for globals/functions etc.
1127static void WriteValueSymbolTable(const ValueSymbolTable &VST,
1128 const ValueEnumerator &VE,
1129 BitstreamWriter &Stream) {
1130 if (VST.empty()) return;
1131 Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4);
1132
1133 // FIXME: Set up the abbrev, we know how many values there are!
1134 // FIXME: We know if the type names can use 7-bit ascii.
1135 SmallVector<unsigned, 64> NameVals;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001136
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001137 for (ValueSymbolTable::const_iterator SI = VST.begin(), SE = VST.end();
1138 SI != SE; ++SI) {
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001139
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001140 const ValueName &Name = *SI;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001141
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001142 // Figure out the encoding to use for the name.
1143 bool is7Bit = true;
1144 bool isChar6 = true;
1145 for (const char *C = Name.getKeyData(), *E = C+Name.getKeyLength();
1146 C != E; ++C) {
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001147 if (isChar6)
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001148 isChar6 = BitCodeAbbrevOp::isChar6(*C);
1149 if ((unsigned char)*C & 128) {
1150 is7Bit = false;
1151 break; // don't bother scanning the rest.
1152 }
1153 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001154
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001155 unsigned AbbrevToUse = VST_ENTRY_8_ABBREV;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001156
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001157 // VST_ENTRY: [valueid, namechar x N]
1158 // VST_BBENTRY: [bbid, namechar x N]
1159 unsigned Code;
Chris Lattnerd89380f2009-08-04 23:07:12 +00001160 if (isa<BasicBlock>(SI->getValue())) {
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001161 Code = bitc::VST_CODE_BBENTRY;
1162 if (isChar6)
1163 AbbrevToUse = VST_BBENTRY_6_ABBREV;
1164 } else {
1165 Code = bitc::VST_CODE_ENTRY;
1166 if (isChar6)
1167 AbbrevToUse = VST_ENTRY_6_ABBREV;
1168 else if (is7Bit)
1169 AbbrevToUse = VST_ENTRY_7_ABBREV;
1170 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001171
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001172 NameVals.push_back(VE.getValueID(SI->getValue()));
1173 for (const char *P = Name.getKeyData(),
1174 *E = Name.getKeyData()+Name.getKeyLength(); P != E; ++P)
1175 NameVals.push_back((unsigned char)*P);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001176
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001177 // Emit the finished record.
1178 Stream.EmitRecord(Code, NameVals, AbbrevToUse);
1179 NameVals.clear();
1180 }
1181 Stream.ExitBlock();
1182}
1183
1184/// WriteFunction - Emit a function body to the module stream.
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001185static void WriteFunction(const Function &F, ValueEnumerator &VE,
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001186 BitstreamWriter &Stream) {
1187 Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4);
1188 VE.incorporateFunction(F);
1189
1190 SmallVector<unsigned, 64> Vals;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001191
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001192 // Emit the number of basic blocks, so the reader can create them ahead of
1193 // time.
1194 Vals.push_back(VE.getBasicBlocks().size());
1195 Stream.EmitRecord(bitc::FUNC_CODE_DECLAREBLOCKS, Vals);
1196 Vals.clear();
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001197
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001198 // If there are function-local constants, emit them now.
1199 unsigned CstStart, CstEnd;
1200 VE.getFunctionConstantRange(CstStart, CstEnd);
Devang Patel765e2162009-08-04 05:01:35 +00001201 WriteConstants(CstStart, CstEnd, VE, Stream, false);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001202
1203 // Keep a running idea of what the instruction ID is.
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001204 unsigned InstID = CstEnd;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001205
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001206 // Finally, emit all the instructions, in order.
Nick Lewyckyd8aa33a2008-04-25 16:53:59 +00001207 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001208 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
1209 I != E; ++I) {
1210 WriteInstruction(*I, InstID, VE, Stream, Vals);
Owen Anderson35b47072009-08-13 21:58:54 +00001211 if (I->getType() != Type::getVoidTy(F.getContext()))
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001212 ++InstID;
1213 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001214
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001215 // Emit names for all the instructions etc.
1216 WriteValueSymbolTable(F.getValueSymbolTable(), VE, Stream);
Devang Pateladc37612009-09-18 19:26:43 +00001217
1218 WriteMetadataAttachment(F, VE, Stream);
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001219 VE.purgeFunction();
1220 Stream.ExitBlock();
1221}
1222
1223/// WriteTypeSymbolTable - Emit a block for the specified type symtab.
1224static void WriteTypeSymbolTable(const TypeSymbolTable &TST,
1225 const ValueEnumerator &VE,
1226 BitstreamWriter &Stream) {
1227 if (TST.empty()) return;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001228
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001229 Stream.EnterSubblock(bitc::TYPE_SYMTAB_BLOCK_ID, 3);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001230
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001231 // 7-bit fixed width VST_CODE_ENTRY strings.
1232 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1233 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
1234 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
1235 Log2_32_Ceil(VE.getTypes().size()+1)));
1236 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1237 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
1238 unsigned V7Abbrev = Stream.EmitAbbrev(Abbv);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001239
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001240 SmallVector<unsigned, 64> NameVals;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001241
1242 for (TypeSymbolTable::const_iterator TI = TST.begin(), TE = TST.end();
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001243 TI != TE; ++TI) {
1244 // TST_ENTRY: [typeid, namechar x N]
1245 NameVals.push_back(VE.getTypeID(TI->second));
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001246
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001247 const std::string &Str = TI->first;
1248 bool is7Bit = true;
1249 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
1250 NameVals.push_back((unsigned char)Str[i]);
1251 if (Str[i] & 128)
1252 is7Bit = false;
1253 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001254
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001255 // Emit the finished record.
1256 Stream.EmitRecord(bitc::VST_CODE_ENTRY, NameVals, is7Bit ? V7Abbrev : 0);
1257 NameVals.clear();
1258 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001259
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001260 Stream.ExitBlock();
1261}
1262
1263// Emit blockinfo, which defines the standard abbreviations etc.
1264static void WriteBlockInfo(const ValueEnumerator &VE, BitstreamWriter &Stream) {
1265 // We only want to emit block info records for blocks that have multiple
1266 // instances: CONSTANTS_BLOCK, FUNCTION_BLOCK and VALUE_SYMTAB_BLOCK. Other
1267 // blocks can defined their abbrevs inline.
1268 Stream.EnterBlockInfoBlock(2);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001269
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001270 { // 8-bit fixed-width VST_ENTRY/VST_BBENTRY strings.
1271 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1272 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3));
1273 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1274 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1275 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001276 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001277 Abbv) != VST_ENTRY_8_ABBREV)
Edwin Törökbd448e32009-07-14 16:55:14 +00001278 llvm_unreachable("Unexpected abbrev ordering!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001279 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001280
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001281 { // 7-bit fixed width VST_ENTRY strings.
1282 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1283 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
1284 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1285 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1286 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
1287 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1288 Abbv) != VST_ENTRY_7_ABBREV)
Edwin Törökbd448e32009-07-14 16:55:14 +00001289 llvm_unreachable("Unexpected abbrev ordering!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001290 }
1291 { // 6-bit char6 VST_ENTRY strings.
1292 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1293 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
1294 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1295 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1296 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
1297 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1298 Abbv) != VST_ENTRY_6_ABBREV)
Edwin Törökbd448e32009-07-14 16:55:14 +00001299 llvm_unreachable("Unexpected abbrev ordering!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001300 }
1301 { // 6-bit char6 VST_BBENTRY strings.
1302 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1303 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_BBENTRY));
1304 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1305 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1306 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
1307 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1308 Abbv) != VST_BBENTRY_6_ABBREV)
Edwin Törökbd448e32009-07-14 16:55:14 +00001309 llvm_unreachable("Unexpected abbrev ordering!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001310 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001311
1312
1313
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001314 { // SETTYPE abbrev for CONSTANTS_BLOCK.
1315 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1316 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE));
1317 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
1318 Log2_32_Ceil(VE.getTypes().size()+1)));
1319 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1320 Abbv) != CONSTANTS_SETTYPE_ABBREV)
Edwin Törökbd448e32009-07-14 16:55:14 +00001321 llvm_unreachable("Unexpected abbrev ordering!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001322 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001323
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001324 { // INTEGER abbrev for CONSTANTS_BLOCK.
1325 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1326 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_INTEGER));
1327 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1328 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1329 Abbv) != CONSTANTS_INTEGER_ABBREV)
Edwin Törökbd448e32009-07-14 16:55:14 +00001330 llvm_unreachable("Unexpected abbrev ordering!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001331 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001332
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001333 { // CE_CAST abbrev for CONSTANTS_BLOCK.
1334 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1335 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CE_CAST));
1336 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // cast opc
1337 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // typeid
1338 Log2_32_Ceil(VE.getTypes().size()+1)));
1339 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id
1340
1341 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1342 Abbv) != CONSTANTS_CE_CAST_Abbrev)
Edwin Törökbd448e32009-07-14 16:55:14 +00001343 llvm_unreachable("Unexpected abbrev ordering!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001344 }
1345 { // NULL abbrev for CONSTANTS_BLOCK.
1346 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1347 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_NULL));
1348 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1349 Abbv) != CONSTANTS_NULL_Abbrev)
Edwin Törökbd448e32009-07-14 16:55:14 +00001350 llvm_unreachable("Unexpected abbrev ordering!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001351 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001352
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001353 // FIXME: This should only use space for first class types!
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001354
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001355 { // INST_LOAD abbrev for FUNCTION_BLOCK.
1356 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1357 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_LOAD));
1358 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Ptr
1359 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // Align
1360 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // volatile
1361 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1362 Abbv) != FUNCTION_INST_LOAD_ABBREV)
Edwin Törökbd448e32009-07-14 16:55:14 +00001363 llvm_unreachable("Unexpected abbrev ordering!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001364 }
1365 { // INST_BINOP abbrev for FUNCTION_BLOCK.
1366 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1367 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
1368 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
1369 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
1370 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
1371 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1372 Abbv) != FUNCTION_INST_BINOP_ABBREV)
Edwin Törökbd448e32009-07-14 16:55:14 +00001373 llvm_unreachable("Unexpected abbrev ordering!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001374 }
Dan Gohman799a8c82009-07-20 21:19:07 +00001375 { // INST_BINOP_FLAGS abbrev for FUNCTION_BLOCK.
1376 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1377 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
1378 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
1379 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
1380 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
1381 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); // flags
1382 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1383 Abbv) != FUNCTION_INST_BINOP_FLAGS_ABBREV)
1384 llvm_unreachable("Unexpected abbrev ordering!");
1385 }
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001386 { // INST_CAST abbrev for FUNCTION_BLOCK.
1387 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1388 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_CAST));
1389 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpVal
1390 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
1391 Log2_32_Ceil(VE.getTypes().size()+1)));
1392 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
1393 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1394 Abbv) != FUNCTION_INST_CAST_ABBREV)
Edwin Törökbd448e32009-07-14 16:55:14 +00001395 llvm_unreachable("Unexpected abbrev ordering!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001396 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001397
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001398 { // INST_RET abbrev for FUNCTION_BLOCK.
1399 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1400 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
1401 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1402 Abbv) != FUNCTION_INST_RET_VOID_ABBREV)
Edwin Törökbd448e32009-07-14 16:55:14 +00001403 llvm_unreachable("Unexpected abbrev ordering!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001404 }
1405 { // INST_RET abbrev for FUNCTION_BLOCK.
1406 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1407 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
1408 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ValID
1409 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1410 Abbv) != FUNCTION_INST_RET_VAL_ABBREV)
Edwin Törökbd448e32009-07-14 16:55:14 +00001411 llvm_unreachable("Unexpected abbrev ordering!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001412 }
1413 { // INST_UNREACHABLE abbrev for FUNCTION_BLOCK.
1414 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1415 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_UNREACHABLE));
1416 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1417 Abbv) != FUNCTION_INST_UNREACHABLE_ABBREV)
Edwin Törökbd448e32009-07-14 16:55:14 +00001418 llvm_unreachable("Unexpected abbrev ordering!");
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001419 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001420
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001421 Stream.ExitBlock();
1422}
1423
1424
1425/// WriteModule - Emit the specified module to the bitstream.
1426static void WriteModule(const Module *M, BitstreamWriter &Stream) {
1427 Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001428
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001429 // Emit the version number if it is non-zero.
1430 if (CurVersion) {
1431 SmallVector<unsigned, 1> Vals;
1432 Vals.push_back(CurVersion);
1433 Stream.EmitRecord(bitc::MODULE_CODE_VERSION, Vals);
1434 }
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001435
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001436 // Analyze the module, enumerating globals, functions, etc.
1437 ValueEnumerator VE(M);
1438
1439 // Emit blockinfo, which defines the standard abbreviations etc.
1440 WriteBlockInfo(VE, Stream);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001441
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001442 // Emit information about parameter attributes.
Devang Pateld222f862008-09-25 21:00:45 +00001443 WriteAttributeTable(VE, Stream);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001444
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001445 // Emit information describing all of the types in the module.
1446 WriteTypeTable(VE, Stream);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001447
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001448 // Emit top-level description of module, including target triple, inline asm,
1449 // descriptors for global variables, and function prototype info.
1450 WriteModuleInfo(M, VE, Stream);
Devang Patel0c0a6ca2009-07-22 17:43:22 +00001451
Devang Patel54199ef2009-07-23 01:07:34 +00001452 // Emit constants.
1453 WriteModuleConstants(VE, Stream);
1454
Devang Patel765e2162009-08-04 05:01:35 +00001455 // Emit metadata.
1456 WriteModuleMetadata(VE, Stream);
1457
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001458 // Emit function bodies.
1459 for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
1460 if (!I->isDeclaration())
1461 WriteFunction(*I, VE, Stream);
Devang Pateladc37612009-09-18 19:26:43 +00001462
1463 // Emit metadata.
Chris Lattnere5bb39b2009-12-28 20:10:43 +00001464 WriteModuleMetadataStore(M, Stream);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001465
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001466 // Emit the type symbol table information.
1467 WriteTypeSymbolTable(M->getTypeSymbolTable(), VE, Stream);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001468
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001469 // Emit names for globals/functions etc.
1470 WriteValueSymbolTable(M->getValueSymbolTable(), VE, Stream);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001471
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001472 Stream.ExitBlock();
1473}
1474
Chris Lattner65b13ff2008-07-09 05:14:23 +00001475/// EmitDarwinBCHeader - If generating a bc file on darwin, we have to emit a
1476/// header and trailer to make it compatible with the system archiver. To do
1477/// this we emit the following header, and then emit a trailer that pads the
1478/// file out to be a multiple of 16 bytes.
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001479///
Chris Lattner65b13ff2008-07-09 05:14:23 +00001480/// struct bc_header {
1481/// uint32_t Magic; // 0x0B17C0DE
1482/// uint32_t Version; // Version, currently always 0.
1483/// uint32_t BitcodeOffset; // Offset to traditional bitcode file.
1484/// uint32_t BitcodeSize; // Size of traditional bitcode file.
1485/// uint32_t CPUType; // CPU specifier.
1486/// ... potentially more later ...
1487/// };
1488enum {
1489 DarwinBCSizeFieldOffset = 3*4, // Offset to bitcode_size.
1490 DarwinBCHeaderSize = 5*4
1491};
1492
1493static void EmitDarwinBCHeader(BitstreamWriter &Stream,
1494 const std::string &TT) {
1495 unsigned CPUType = ~0U;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001496
Chris Lattner65b13ff2008-07-09 05:14:23 +00001497 // Match x86_64-*, i[3-9]86-*, powerpc-*, powerpc64-*. The CPUType is a
1498 // magic number from /usr/include/mach/machine.h. It is ok to reproduce the
1499 // specific constants here because they are implicitly part of the Darwin ABI.
1500 enum {
1501 DARWIN_CPU_ARCH_ABI64 = 0x01000000,
1502 DARWIN_CPU_TYPE_X86 = 7,
1503 DARWIN_CPU_TYPE_POWERPC = 18
1504 };
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001505
Chris Lattner65b13ff2008-07-09 05:14:23 +00001506 if (TT.find("x86_64-") == 0)
1507 CPUType = DARWIN_CPU_TYPE_X86 | DARWIN_CPU_ARCH_ABI64;
1508 else if (TT.size() >= 5 && TT[0] == 'i' && TT[2] == '8' && TT[3] == '6' &&
1509 TT[4] == '-' && TT[1] - '3' < 6)
1510 CPUType = DARWIN_CPU_TYPE_X86;
1511 else if (TT.find("powerpc-") == 0)
1512 CPUType = DARWIN_CPU_TYPE_POWERPC;
1513 else if (TT.find("powerpc64-") == 0)
1514 CPUType = DARWIN_CPU_TYPE_POWERPC | DARWIN_CPU_ARCH_ABI64;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001515
Chris Lattner65b13ff2008-07-09 05:14:23 +00001516 // Traditional Bitcode starts after header.
1517 unsigned BCOffset = DarwinBCHeaderSize;
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001518
Chris Lattner65b13ff2008-07-09 05:14:23 +00001519 Stream.Emit(0x0B17C0DE, 32);
1520 Stream.Emit(0 , 32); // Version.
1521 Stream.Emit(BCOffset , 32);
1522 Stream.Emit(0 , 32); // Filled in later.
1523 Stream.Emit(CPUType , 32);
1524}
1525
1526/// EmitDarwinBCTrailer - Emit the darwin epilog after the bitcode file and
1527/// finalize the header.
1528static void EmitDarwinBCTrailer(BitstreamWriter &Stream, unsigned BufferSize) {
1529 // Update the size field in the header.
1530 Stream.BackpatchWord(DarwinBCSizeFieldOffset, BufferSize-DarwinBCHeaderSize);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001531
Chris Lattner65b13ff2008-07-09 05:14:23 +00001532 // If the file is not a multiple of 16 bytes, insert dummy padding.
1533 while (BufferSize & 15) {
1534 Stream.Emit(0, 8);
1535 ++BufferSize;
1536 }
1537}
1538
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001539
1540/// WriteBitcodeToFile - Write the specified module to the specified output
1541/// stream.
Daniel Dunbarf741f2a2008-10-22 17:39:14 +00001542void llvm::WriteBitcodeToFile(const Module *M, raw_ostream &Out) {
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001543 std::vector<unsigned char> Buffer;
1544 BitstreamWriter Stream(Buffer);
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001545
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001546 Buffer.reserve(256*1024);
Chris Lattnerfc649752008-12-19 18:37:59 +00001547
1548 WriteBitcodeToStream( M, Stream );
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001549
Chris Lattnerfc649752008-12-19 18:37:59 +00001550 // If writing to stdout, set binary mode.
1551 if (&llvm::outs() == &Out)
1552 sys::Program::ChangeStdoutToBinary();
1553
1554 // Write the generated bitstream to "Out".
1555 Out.write((char*)&Buffer.front(), Buffer.size());
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001556
Chris Lattnerfc649752008-12-19 18:37:59 +00001557 // Make sure it hits disk now.
1558 Out.flush();
1559}
1560
1561/// WriteBitcodeToStream - Write the specified module to the specified output
1562/// stream.
1563void llvm::WriteBitcodeToStream(const Module *M, BitstreamWriter &Stream) {
Chris Lattner65b13ff2008-07-09 05:14:23 +00001564 // If this is darwin, emit a file header and trailer if needed.
1565 bool isDarwin = M->getTargetTriple().find("-darwin") != std::string::npos;
1566 if (isDarwin)
1567 EmitDarwinBCHeader(Stream, M->getTargetTriple());
Daniel Dunbar3be44e62009-09-20 02:20:51 +00001568
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001569 // Emit the file header.
1570 Stream.Emit((unsigned)'B', 8);
1571 Stream.Emit((unsigned)'C', 8);
1572 Stream.Emit(0x0, 4);
1573 Stream.Emit(0xC, 4);
1574 Stream.Emit(0xE, 4);
1575 Stream.Emit(0xD, 4);
1576
1577 // Emit the module.
1578 WriteModule(M, Stream);
Chris Lattner65b13ff2008-07-09 05:14:23 +00001579
1580 if (isDarwin)
Chris Lattnerfc649752008-12-19 18:37:59 +00001581 EmitDarwinBCTrailer(Stream, Stream.getBuffer().size());
Dan Gohmanf17a25c2007-07-18 16:29:46 +00001582}