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Chris Lattner87351e22007-04-29 05:31:57 +00001//===--- Bitcode/Writer/BitcodeWriter.cpp - Bitcode Writer ----------------===//
Chris Lattnerc1d10d62007-04-22 06:24:45 +00002//
3// The LLVM Compiler Infrastructure
4//
Chris Lattnerf3ebc3f2007-12-29 20:36:04 +00005// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
Chris Lattnerc1d10d62007-04-22 06:24:45 +00007//
8//===----------------------------------------------------------------------===//
9//
10// Bitcode writer implementation.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/Bitcode/ReaderWriter.h"
15#include "llvm/Bitcode/BitstreamWriter.h"
Chris Lattner362b4a12007-04-23 01:01:37 +000016#include "llvm/Bitcode/LLVMBitCodes.h"
Chris Lattnerc1d10d62007-04-22 06:24:45 +000017#include "ValueEnumerator.h"
Chris Lattner52523562007-04-24 00:16:04 +000018#include "llvm/Constants.h"
Chris Lattnerc1d10d62007-04-22 06:24:45 +000019#include "llvm/DerivedTypes.h"
Chris Lattneraf8fffc2007-05-06 01:58:20 +000020#include "llvm/InlineAsm.h"
Chris Lattnere6e364c2007-04-26 05:53:54 +000021#include "llvm/Instructions.h"
Chris Lattner26a7ae42009-10-27 17:08:31 +000022#include "llvm/LLVMContext.h"
Devang Patela4f43fb2009-07-28 21:49:47 +000023#include "llvm/Metadata.h"
Chris Lattnerc1d10d62007-04-22 06:24:45 +000024#include "llvm/Module.h"
Dan Gohman0ebd6962009-07-20 21:19:07 +000025#include "llvm/Operator.h"
Chris Lattnerc1d10d62007-04-22 06:24:45 +000026#include "llvm/TypeSymbolTable.h"
Chris Lattner215e9cd2007-04-23 20:35:01 +000027#include "llvm/ValueSymbolTable.h"
Torok Edwin56d06592009-07-11 20:10:48 +000028#include "llvm/Support/ErrorHandling.h"
Chris Lattnerc1d10d62007-04-22 06:24:45 +000029#include "llvm/Support/MathExtras.h"
Daniel Dunbar890d0de2008-10-22 17:39:14 +000030#include "llvm/Support/raw_ostream.h"
Anton Korobeynikov5b3e3962008-06-06 07:24:01 +000031#include "llvm/System/Program.h"
Chris Lattnerc1d10d62007-04-22 06:24:45 +000032using namespace llvm;
33
Chris Lattner4d925982007-05-04 20:52:02 +000034/// 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 Dunbar7d6781b2009-09-20 02:20:51 +000038
Chris Lattner4d925982007-05-04 20:52:02 +000039 // VALUE_SYMTAB_BLOCK abbrev id's.
40 VST_ENTRY_8_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
Chris Lattnerfd1ad102007-05-04 20:58:35 +000041 VST_ENTRY_7_ABBREV,
Chris Lattnere760d6f2007-05-05 01:26:50 +000042 VST_ENTRY_6_ABBREV,
Chris Lattnerda5e5d22007-05-05 07:36:14 +000043 VST_BBENTRY_6_ABBREV,
Daniel Dunbar7d6781b2009-09-20 02:20:51 +000044
Chris Lattnerda5e5d22007-05-05 07:36:14 +000045 // CONSTANTS_BLOCK abbrev id's.
46 CONSTANTS_SETTYPE_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
47 CONSTANTS_INTEGER_ABBREV,
48 CONSTANTS_CE_CAST_Abbrev,
Chris Lattnerb80751d2007-05-05 07:44:49 +000049 CONSTANTS_NULL_Abbrev,
Daniel Dunbar7d6781b2009-09-20 02:20:51 +000050
Chris Lattnerb80751d2007-05-05 07:44:49 +000051 // FUNCTION_BLOCK abbrev id's.
Chris Lattnercc6d4c92007-05-06 01:28:01 +000052 FUNCTION_INST_LOAD_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
Chris Lattnerc67e6d92007-05-06 02:38:57 +000053 FUNCTION_INST_BINOP_ABBREV,
Dan Gohman0ebd6962009-07-20 21:19:07 +000054 FUNCTION_INST_BINOP_FLAGS_ABBREV,
Chris Lattnerc67e6d92007-05-06 02:38:57 +000055 FUNCTION_INST_CAST_ABBREV,
Chris Lattnercc6d4c92007-05-06 01:28:01 +000056 FUNCTION_INST_RET_VOID_ABBREV,
57 FUNCTION_INST_RET_VAL_ABBREV,
58 FUNCTION_INST_UNREACHABLE_ABBREV
Chris Lattner4d925982007-05-04 20:52:02 +000059};
60
Chris Lattnerc1d10d62007-04-22 06:24:45 +000061
Chris Lattner1e16bcf72007-04-24 07:07:11 +000062static unsigned GetEncodedCastOpcode(unsigned Opcode) {
63 switch (Opcode) {
Torok Edwinfbcc6632009-07-14 16:55:14 +000064 default: llvm_unreachable("Unknown cast instruction!");
Chris Lattner1e16bcf72007-04-24 07:07:11 +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) {
Torok Edwinfbcc6632009-07-14 16:55:14 +000082 default: llvm_unreachable("Unknown binary instruction!");
Dan Gohmana5b96452009-06-04 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;
Chris Lattner1e16bcf72007-04-24 07:07:11 +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 Dunbar7d6781b2009-09-20 02:20:51 +0000106static void WriteStringRecord(unsigned Code, const std::string &Str,
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000107 unsigned AbbrevToUse, BitstreamWriter &Stream) {
108 SmallVector<unsigned, 64> Vals;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000109
Chris Lattnere14cb882007-05-04 19:11:41 +0000110 // Code: [strchar x N]
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000111 for (unsigned i = 0, e = Str.size(); i != e; ++i)
112 Vals.push_back(Str[i]);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000113
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000114 // Emit the finished record.
115 Stream.EmitRecord(Code, Vals, AbbrevToUse);
116}
117
Chris Lattnere2f98ef2007-05-04 00:44:52 +0000118// Emit information about parameter attributes.
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000119static void WriteAttributeTable(const ValueEnumerator &VE,
Chris Lattnere2f98ef2007-05-04 00:44:52 +0000120 BitstreamWriter &Stream) {
Devang Patel4c758ea2008-09-25 21:00:45 +0000121 const std::vector<AttrListPtr> &Attrs = VE.getAttributes();
Chris Lattnere2f98ef2007-05-04 00:44:52 +0000122 if (Attrs.empty()) return;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000123
Chris Lattnere72bf9f2007-05-04 02:59:04 +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 Patel4c758ea2008-09-25 21:00:45 +0000128 const AttrListPtr &A = Attrs[i];
Chris Lattner8a923e72008-03-12 17:45:29 +0000129 for (unsigned i = 0, e = A.getNumSlots(); i != e; ++i) {
Devang Patel4c758ea2008-09-25 21:00:45 +0000130 const AttributeWithIndex &PAWI = A.getSlot(i);
Chris Lattner8a923e72008-03-12 17:45:29 +0000131 Record.push_back(PAWI.Index);
Nick Lewycky8d69f482008-12-19 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);
Chris Lattnere72bf9f2007-05-04 02:59:04 +0000143 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000144
Chris Lattnere72bf9f2007-05-04 02:59:04 +0000145 Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record);
146 Record.clear();
147 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000148
Chris Lattnere72bf9f2007-05-04 02:59:04 +0000149 Stream.ExitBlock();
Chris Lattnere2f98ef2007-05-04 00:44:52 +0000150}
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000151
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 Dunbar7d6781b2009-09-20 02:20:51 +0000155
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000156 Stream.EnterSubblock(bitc::TYPE_BLOCK_ID, 4 /*count from # abbrevs */);
157 SmallVector<uint64_t, 64> TypeVals;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000158
Chris Lattnerccee7062007-05-05 06:30:12 +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 Lamb25f50762007-12-12 08:44:39 +0000164 Abbv->Add(BitCodeAbbrevOp(0)); // Addrspace = 0
Chris Lattnerccee7062007-05-05 06:30:12 +0000165 unsigned PtrAbbrev = Stream.EmitAbbrev(Abbv);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000166
Chris Lattnerccee7062007-05-05 06:30:12 +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 Lattner1dfc48d2007-11-27 17:48:06 +0000171 Abbv->Add(BitCodeAbbrevOp(0)); // FIXME: DEAD value, remove in LLVM 3.0
Chris Lattnerccee7062007-05-05 06:30:12 +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 Dunbar7d6781b2009-09-20 02:20:51 +0000176
Chris Lattnerccee7062007-05-05 06:30:12 +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 Dunbar7d6781b2009-09-20 02:20:51 +0000185
Chris Lattnerccee7062007-05-05 06:30:12 +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 Dunbar7d6781b2009-09-20 02:20:51 +0000193
Chris Lattnerc1d10d62007-04-22 06:24:45 +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 Dunbar7d6781b2009-09-20 02:20:51 +0000198
Chris Lattnerc1d10d62007-04-22 06:24:45 +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 Dunbar7d6781b2009-09-20 02:20:51 +0000204
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000205 switch (T->getTypeID()) {
Torok Edwinfbcc6632009-07-14 16:55:14 +0000206 default: llvm_unreachable("Unknown type!");
Chris Lattnerc1d10d62007-04-22 06:24:45 +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 Johannesenff4c3be2007-08-03 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;
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000213 case Type::LabelTyID: Code = bitc::TYPE_CODE_LABEL; break;
214 case Type::OpaqueTyID: Code = bitc::TYPE_CODE_OPAQUE; break;
Nick Lewyckyadbc2842009-05-30 05:06:04 +0000215 case Type::MetadataTyID: Code = bitc::TYPE_CODE_METADATA; break;
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000216 case Type::IntegerTyID:
217 // INTEGER: [width]
218 Code = bitc::TYPE_CODE_INTEGER;
219 TypeVals.push_back(cast<IntegerType>(T)->getBitWidth());
220 break;
Duncan Sandsf41217d2007-12-11 12:20:47 +0000221 case Type::PointerTyID: {
Christopher Lamb54dd24c2007-12-11 08:59:05 +0000222 const PointerType *PTy = cast<PointerType>(T);
Christopher Lamb25f50762007-12-12 08:44:39 +0000223 // POINTER: [pointee type, address space]
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000224 Code = bitc::TYPE_CODE_POINTER;
Christopher Lamb54dd24c2007-12-11 08:59:05 +0000225 TypeVals.push_back(VE.getTypeID(PTy->getElementType()));
Christopher Lamb25f50762007-12-12 08:44:39 +0000226 unsigned AddressSpace = PTy->getAddressSpace();
227 TypeVals.push_back(AddressSpace);
228 if (AddressSpace == 0) AbbrevToUse = PtrAbbrev;
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000229 break;
Duncan Sandsf41217d2007-12-11 12:20:47 +0000230 }
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000231 case Type::FunctionTyID: {
232 const FunctionType *FT = cast<FunctionType>(T);
Chris Lattner1dfc48d2007-11-27 17:48:06 +0000233 // FUNCTION: [isvararg, attrid, retty, paramty x N]
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000234 Code = bitc::TYPE_CODE_FUNCTION;
235 TypeVals.push_back(FT->isVarArg());
Chris Lattner1dfc48d2007-11-27 17:48:06 +0000236 TypeVals.push_back(0); // FIXME: DEAD: remove in llvm 3.0
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000237 TypeVals.push_back(VE.getTypeID(FT->getReturnType()));
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000238 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i)
239 TypeVals.push_back(VE.getTypeID(FT->getParamType(i)));
Chris Lattnerccee7062007-05-05 06:30:12 +0000240 AbbrevToUse = FunctionAbbrev;
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000241 break;
242 }
243 case Type::StructTyID: {
244 const StructType *ST = cast<StructType>(T);
Chris Lattnerccee7062007-05-05 06:30:12 +0000245 // STRUCT: [ispacked, eltty x N]
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000246 Code = bitc::TYPE_CODE_STRUCT;
247 TypeVals.push_back(ST->isPacked());
Chris Lattnere14cb882007-05-04 19:11:41 +0000248 // Output all of the element types.
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000249 for (StructType::element_iterator I = ST->element_begin(),
250 E = ST->element_end(); I != E; ++I)
251 TypeVals.push_back(VE.getTypeID(*I));
Chris Lattnerccee7062007-05-05 06:30:12 +0000252 AbbrevToUse = StructAbbrev;
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000253 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()));
Chris Lattnerccee7062007-05-05 06:30:12 +0000261 AbbrevToUse = ArrayAbbrev;
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000262 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 Dunbar7d6781b2009-09-20 02:20:51 +0000278
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000279 Stream.ExitBlock();
280}
281
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000282static unsigned getEncodedLinkage(const GlobalValue *GV) {
283 switch (GV->getLinkage()) {
Torok Edwinfbcc6632009-07-14 16:55:14 +0000284 default: llvm_unreachable("Invalid linkage!");
Chris Lattnera2615312007-05-11 23:51:59 +0000285 case GlobalValue::GhostLinkage: // Map ghost linkage onto external.
Bill Wendlinga3c6f6b2009-07-20 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;
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000300 }
301}
302
303static unsigned getEncodedVisibility(const GlobalValue *GV) {
304 switch (GV->getVisibility()) {
Torok Edwinfbcc6632009-07-14 16:55:14 +0000305 default: llvm_unreachable("Invalid visibility!");
Anton Korobeynikov31fc4f92007-04-29 20:56:48 +0000306 case GlobalValue::DefaultVisibility: return 0;
307 case GlobalValue::HiddenVisibility: return 1;
308 case GlobalValue::ProtectedVisibility: return 2;
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000309 }
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 Henriksend930f912008-08-17 18:44:35 +0000331 // Emit information about sections and GC, computing how many there are. Also
332 // compute the maximum alignment value.
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000333 std::map<std::string, unsigned> SectionMap;
Gordon Henriksend930f912008-08-17 18:44:35 +0000334 std::map<std::string, unsigned> GCMap;
Chris Lattner4b00d922007-04-23 16:04:05 +0000335 unsigned MaxAlignment = 0;
Chris Lattnerb5491372007-04-23 18:58:34 +0000336 unsigned MaxGlobalType = 0;
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000337 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end();
338 GV != E; ++GV) {
Chris Lattner4b00d922007-04-23 16:04:05 +0000339 MaxAlignment = std::max(MaxAlignment, GV->getAlignment());
Chris Lattnerb5491372007-04-23 18:58:34 +0000340 MaxGlobalType = std::max(MaxGlobalType, VE.getTypeID(GV->getType()));
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000341
Chris Lattnerc1d10d62007-04-22 06:24:45 +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) {
Chris Lattner4b00d922007-04-23 16:04:05 +0000351 MaxAlignment = std::max(MaxAlignment, F->getAlignment());
Gordon Henriksen71183b62007-12-10 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 Henriksend930f912008-08-17 18:44:35 +0000361 if (F->hasGC()) {
362 // Same for GC names.
363 unsigned &Entry = GCMap[F->getGC()];
Gordon Henriksen71183b62007-12-10 03:18:06 +0000364 if (!Entry) {
Gordon Henriksend930f912008-08-17 18:44:35 +0000365 WriteStringRecord(bitc::MODULE_CODE_GCNAME, F->getGC(),
Gordon Henriksen71183b62007-12-10 03:18:06 +0000366 0/*TODO*/, Stream);
Gordon Henriksend930f912008-08-17 18:44:35 +0000367 Entry = GCMap.size();
Gordon Henriksen71183b62007-12-10 03:18:06 +0000368 }
369 }
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000370 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000371
Chris Lattner4b00d922007-04-23 16:04:05 +0000372 // Emit abbrev for globals, now that we know # sections and max alignment.
373 unsigned SimpleGVarAbbrev = 0;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000374 if (!M->global_empty()) {
Chris Lattner4b00d922007-04-23 16:04:05 +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));
Chris Lattner2eae59f2007-05-04 20:34:50 +0000378 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
Chris Lattnerb5491372007-04-23 18:58:34 +0000379 Log2_32_Ceil(MaxGlobalType+1)));
Chris Lattner2eae59f2007-05-04 20:34:50 +0000380 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Constant.
Chris Lattner4b00d922007-04-23 16:04:05 +0000381 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Initializer.
Dale Johannesen6ef726a2008-05-15 20:49:28 +0000382 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // Linkage.
Chris Lattner2eae59f2007-05-04 20:34:50 +0000383 if (MaxAlignment == 0) // Alignment.
Chris Lattner4b00d922007-04-23 16:04:05 +0000384 Abbv->Add(BitCodeAbbrevOp(0));
385 else {
386 unsigned MaxEncAlignment = Log2_32(MaxAlignment)+1;
Chris Lattner2eae59f2007-05-04 20:34:50 +0000387 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
Chris Lattnerb5491372007-04-23 18:58:34 +0000388 Log2_32_Ceil(MaxEncAlignment+1)));
Chris Lattner4b00d922007-04-23 16:04:05 +0000389 }
390 if (SectionMap.empty()) // Section.
391 Abbv->Add(BitCodeAbbrevOp(0));
392 else
Chris Lattner2eae59f2007-05-04 20:34:50 +0000393 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
Chris Lattner1e50c292007-04-24 03:29:47 +0000394 Log2_32_Ceil(SectionMap.size()+1)));
Chris Lattner4b00d922007-04-23 16:04:05 +0000395 // Don't bother emitting vis + thread local.
396 SimpleGVarAbbrev = Stream.EmitAbbrev(Abbv);
397 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000398
Chris Lattnerc1d10d62007-04-22 06:24:45 +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) {
Chris Lattner4b00d922007-04-23 16:04:05 +0000403 unsigned AbbrevToUse = 0;
404
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000405 // GLOBALVAR: [type, isconst, initid,
Chris Lattnerc1d10d62007-04-22 06:24:45 +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 Dunbar7d6781b2009-09-20 02:20:51 +0000414 if (GV->isThreadLocal() ||
Chris Lattner4b00d922007-04-23 16:04:05 +0000415 GV->getVisibility() != GlobalValue::DefaultVisibility) {
416 Vals.push_back(getEncodedVisibility(GV));
417 Vals.push_back(GV->isThreadLocal());
418 } else {
419 AbbrevToUse = SimpleGVarAbbrev;
420 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000421
Chris Lattnerc1d10d62007-04-22 06:24:45 +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 Sandsad0ea2d2007-11-27 13:23:08 +0000428 // FUNCTION: [type, callingconv, isproto, paramattr,
Gordon Henriksend930f912008-08-17 18:44:35 +0000429 // linkage, alignment, section, visibility, gc]
Chris Lattnerc1d10d62007-04-22 06:24:45 +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 Patel4c758ea2008-09-25 21:00:45 +0000434 Vals.push_back(VE.getAttributeID(F->getAttributes()));
Chris Lattnerc1d10d62007-04-22 06:24:45 +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 Henriksend930f912008-08-17 18:44:35 +0000438 Vals.push_back(F->hasGC() ? GCMap[F->getGC()] : 0);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000439
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000440 unsigned AbbrevToUse = 0;
441 Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse);
442 Vals.clear();
443 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000444
445
Chris Lattner44c17072007-04-26 02:46:40 +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 Korobeynikovdb691cb2008-03-11 21:40:17 +0000452 Vals.push_back(getEncodedVisibility(AI));
Chris Lattner44c17072007-04-26 02:46:40 +0000453 unsigned AbbrevToUse = 0;
454 Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals, AbbrevToUse);
455 Vals.clear();
456 }
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000457}
458
Dan Gohman0ebd6962009-07-20 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 Gohman16f54152009-08-20 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 Gohman0ebd6962009-07-20 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}
Chris Lattnerc1d10d62007-04-22 06:24:45 +0000475
Devang Patel8cca7b42009-08-04 05:01:35 +0000476static void WriteMDNode(const MDNode *N,
Devang Patel727a5822009-07-29 18:15:02 +0000477 const ValueEnumerator &VE,
Devang Patel8cca7b42009-08-04 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 Anderson55f1c092009-08-13 21:58:54 +0000485 Record.push_back(VE.getTypeID(Type::getVoidTy(N->getContext())));
Devang Patel8cca7b42009-08-04 05:01:35 +0000486 Record.push_back(0);
487 }
488 }
489 Stream.EmitRecord(bitc::METADATA_NODE, Record, 0);
490 Record.clear();
491}
Devang Patele059ba6e2009-07-23 01:07:34 +0000492
Devang Patel8cca7b42009-08-04 05:01:35 +0000493static void WriteModuleMetadata(const ValueEnumerator &VE,
494 BitstreamWriter &Stream) {
Devang Patel05eb6172009-08-04 06:00:18 +0000495 const ValueEnumerator::ValueList &Vals = VE.getMDValues();
Devang Patel8cca7b42009-08-04 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 Dunbar7d6781b2009-09-20 02:20:51 +0000500
Devang Patel8cca7b42009-08-04 05:01:35 +0000501 if (const MDNode *N = dyn_cast<MDNode>(Vals[i].first)) {
502 if (!StartedMetadataBlock) {
Devang Patel8abe6bc2009-08-04 02:26:56 +0000503 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
Devang Patel8cca7b42009-08-04 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 Dunbar7d6781b2009-09-20 02:20:51 +0000510
Devang Patel096ecf12009-07-22 21:10:50 +0000511 // Abbrev for METADATA_STRING.
512 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
513 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRING));
Devang Patel7428d8a2009-07-22 17:43:22 +0000514 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Devang Patel096ecf12009-07-22 21:10:50 +0000515 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
516 MDSAbbrev = Stream.EmitAbbrev(Abbv);
Devang Patel8cca7b42009-08-04 05:01:35 +0000517 StartedMetadataBlock = true;
Devang Patel727a5822009-07-29 18:15:02 +0000518 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000519
Devang Patel727a5822009-07-29 18:15:02 +0000520 // Code: [strchar x N]
Chris Lattneraa1332e2009-10-19 05:51:03 +0000521 Record.append(MDS->begin(), MDS->end());
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000522
Devang Patel727a5822009-07-29 18:15:02 +0000523 // Emit the finished record.
Devang Patele059ba6e2009-07-23 01:07:34 +0000524 Stream.EmitRecord(bitc::METADATA_STRING, Record, MDSAbbrev);
525 Record.clear();
Devang Patel8cca7b42009-08-04 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 Patel27c87ff2009-07-29 22:34:41 +0000530 }
Devang Patel8cca7b42009-08-04 05:01:35 +0000531
Devang Patel27c87ff2009-07-29 22:34:41 +0000532 // Write name.
Devang Patel16e51242009-07-30 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 Patel27c87ff2009-07-29 22:34:41 +0000536 Record.push_back(StrBegin[i]);
Devang Patel16e51242009-07-30 23:06:35 +0000537 Stream.EmitRecord(bitc::METADATA_NAME, Record, 0/*TODO*/);
Devang Patel27c87ff2009-07-29 22:34:41 +0000538 Record.clear();
Devang Patel8cca7b42009-08-04 05:01:35 +0000539
Devang Patel27c87ff2009-07-29 22:34:41 +0000540 // Write named metadata elements.
541 for (unsigned i = 0, e = NMD->getNumElements(); i != e; ++i) {
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000542 if (NMD->getElement(i))
Devang Patel27c87ff2009-07-29 22:34:41 +0000543 Record.push_back(VE.getValueID(NMD->getElement(i)));
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000544 else
Devang Patel27c87ff2009-07-29 22:34:41 +0000545 Record.push_back(0);
546 }
547 Stream.EmitRecord(bitc::METADATA_NAMED_NODE, Record, 0);
548 Record.clear();
Devang Patel8cca7b42009-08-04 05:01:35 +0000549 }
550 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000551
Devang Patel8cca7b42009-08-04 05:01:35 +0000552 if (StartedMetadataBlock)
Devang Patelaf206b82009-09-18 19:26:43 +0000553 Stream.ExitBlock();
554}
555
556static void WriteMetadataAttachment(const Function &F,
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000557 const ValueEnumerator &VE,
558 BitstreamWriter &Stream) {
Devang Patelaf206b82009-09-18 19:26:43 +0000559 bool StartedMetadataBlock = false;
560 SmallVector<uint64_t, 64> Record;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000561
Devang Patelaf206b82009-09-18 19:26:43 +0000562 // Write metadata attachments
563 // METADATA_ATTACHMENT - [m x [value, [n x [id, mdnode]]]
Devang Patel2d85eef2009-09-28 21:41:20 +0000564 MetadataContext &TheMetadata = F.getContext().getMetadata();
Devang Patel6da5dbf2009-10-22 18:55:16 +0000565 typedef SmallVector<std::pair<unsigned, TrackingVH<MDNode> >, 2> MDMapTy;
566 MDMapTy MDs;
Devang Patelaf206b82009-09-18 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 Patel6da5dbf2009-10-22 18:55:16 +0000570 MDs.clear();
571 TheMetadata.getMDs(I, MDs);
Devang Patelaf206b82009-09-18 19:26:43 +0000572 bool RecordedInstruction = false;
Devang Patel6da5dbf2009-10-22 18:55:16 +0000573 for (MDMapTy::const_iterator PI = MDs.begin(), PE = MDs.end();
574 PI != PE; ++PI) {
Devang Patel084679e2009-10-22 18:25:28 +0000575 if (RecordedInstruction == false) {
576 Record.push_back(VE.getInstructionID(I));
577 RecordedInstruction = true;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000578 }
Devang Patel084679e2009-10-22 18:25:28 +0000579 Record.push_back(PI->first);
580 Record.push_back(VE.getValueID(PI->second));
Devang Patelaf206b82009-09-18 19:26:43 +0000581 }
Devang Patel78cb1022009-10-13 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 Patelaf206b82009-09-18 19:26:43 +0000589 }
Devang Patelaf206b82009-09-18 19:26:43 +0000590 }
591
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000592 if (StartedMetadataBlock)
Devang Patelaf206b82009-09-18 19:26:43 +0000593 Stream.ExitBlock();
594}
595
596static void WriteModuleMetadataStore(const Module *M,
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000597 const ValueEnumerator &VE,
598 BitstreamWriter &Stream) {
599
Devang Patelaf206b82009-09-18 19:26:43 +0000600 bool StartedMetadataBlock = false;
601 SmallVector<uint64_t, 64> Record;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000602
Devang Patelaf206b82009-09-18 19:26:43 +0000603 // Write metadata kinds
604 // METADATA_KIND - [n x [id, name]]
Devang Patel2d85eef2009-09-28 21:41:20 +0000605 MetadataContext &TheMetadata = M->getContext().getMetadata();
Devang Patel0fffb492009-10-22 01:01:24 +0000606 SmallVector<std::pair<unsigned, StringRef>, 4> Names;
607 TheMetadata.getHandlerNames(Names);
608 for (SmallVector<std::pair<unsigned, StringRef>, 4>::iterator
609 I = Names.begin(),
610 E = Names.end(); I != E; ++I) {
611 Record.push_back(I->first);
612 StringRef KName = I->second;
Devang Patelaf206b82009-09-18 19:26:43 +0000613 for (unsigned i = 0, e = KName.size(); i != e; ++i)
614 Record.push_back(KName[i]);
615 if (!StartedMetadataBlock) {
616 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
617 StartedMetadataBlock = true;
618 }
619 Stream.EmitRecord(bitc::METADATA_KIND, Record, 0);
620 Record.clear();
621 }
622
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000623 if (StartedMetadataBlock)
Devang Patelaf206b82009-09-18 19:26:43 +0000624 Stream.ExitBlock();
Devang Patel8cca7b42009-08-04 05:01:35 +0000625}
626
627static void WriteConstants(unsigned FirstVal, unsigned LastVal,
628 const ValueEnumerator &VE,
629 BitstreamWriter &Stream, bool isGlobal) {
630 if (FirstVal == LastVal) return;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000631
Devang Patel8cca7b42009-08-04 05:01:35 +0000632 Stream.EnterSubblock(bitc::CONSTANTS_BLOCK_ID, 4);
633
634 unsigned AggregateAbbrev = 0;
635 unsigned String8Abbrev = 0;
636 unsigned CString7Abbrev = 0;
637 unsigned CString6Abbrev = 0;
638 // If this is a constant pool for the module, emit module-specific abbrevs.
639 if (isGlobal) {
640 // Abbrev for CST_CODE_AGGREGATE.
641 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
642 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_AGGREGATE));
643 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
644 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, Log2_32_Ceil(LastVal+1)));
645 AggregateAbbrev = Stream.EmitAbbrev(Abbv);
646
647 // Abbrev for CST_CODE_STRING.
648 Abbv = new BitCodeAbbrev();
649 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_STRING));
650 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
651 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
652 String8Abbrev = Stream.EmitAbbrev(Abbv);
653 // Abbrev for CST_CODE_CSTRING.
654 Abbv = new BitCodeAbbrev();
655 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
656 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
657 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
658 CString7Abbrev = Stream.EmitAbbrev(Abbv);
659 // Abbrev for CST_CODE_CSTRING.
660 Abbv = new BitCodeAbbrev();
661 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
662 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
663 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
664 CString6Abbrev = Stream.EmitAbbrev(Abbv);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000665 }
666
Devang Patel8cca7b42009-08-04 05:01:35 +0000667 SmallVector<uint64_t, 64> Record;
668
669 const ValueEnumerator::ValueList &Vals = VE.getValues();
670 const Type *LastTy = 0;
671 for (unsigned i = FirstVal; i != LastVal; ++i) {
672 const Value *V = Vals[i].first;
Chris Lattner52523562007-04-24 00:16:04 +0000673 // If we need to switch types, do so now.
674 if (V->getType() != LastTy) {
675 LastTy = V->getType();
676 Record.push_back(VE.getTypeID(LastTy));
Chris Lattnerda5e5d22007-05-05 07:36:14 +0000677 Stream.EmitRecord(bitc::CST_CODE_SETTYPE, Record,
678 CONSTANTS_SETTYPE_ABBREV);
Chris Lattner52523562007-04-24 00:16:04 +0000679 Record.clear();
680 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000681
Chris Lattner52523562007-04-24 00:16:04 +0000682 if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
Dale Johannesenfd04c742009-10-13 20:46:56 +0000683 Record.push_back(unsigned(IA->hasSideEffects()) |
Dale Johannesen1cfb9582009-10-21 23:28:00 +0000684 unsigned(IA->isAlignStack()) << 1);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000685
Chris Lattneraf8fffc2007-05-06 01:58:20 +0000686 // Add the asm string.
687 const std::string &AsmStr = IA->getAsmString();
688 Record.push_back(AsmStr.size());
689 for (unsigned i = 0, e = AsmStr.size(); i != e; ++i)
690 Record.push_back(AsmStr[i]);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000691
Chris Lattneraf8fffc2007-05-06 01:58:20 +0000692 // Add the constraint string.
693 const std::string &ConstraintStr = IA->getConstraintString();
694 Record.push_back(ConstraintStr.size());
695 for (unsigned i = 0, e = ConstraintStr.size(); i != e; ++i)
696 Record.push_back(ConstraintStr[i]);
697 Stream.EmitRecord(bitc::CST_CODE_INLINEASM, Record);
698 Record.clear();
Chris Lattner52523562007-04-24 00:16:04 +0000699 continue;
700 }
701 const Constant *C = cast<Constant>(V);
702 unsigned Code = -1U;
703 unsigned AbbrevToUse = 0;
704 if (C->isNullValue()) {
705 Code = bitc::CST_CODE_NULL;
706 } else if (isa<UndefValue>(C)) {
707 Code = bitc::CST_CODE_UNDEF;
708 } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) {
709 if (IV->getBitWidth() <= 64) {
710 int64_t V = IV->getSExtValue();
711 if (V >= 0)
712 Record.push_back(V << 1);
713 else
714 Record.push_back((-V << 1) | 1);
715 Code = bitc::CST_CODE_INTEGER;
Chris Lattnerda5e5d22007-05-05 07:36:14 +0000716 AbbrevToUse = CONSTANTS_INTEGER_ABBREV;
Chris Lattner52523562007-04-24 00:16:04 +0000717 } else { // Wide integers, > 64 bits in size.
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000718 // We have an arbitrary precision integer value to write whose
719 // bit width is > 64. However, in canonical unsigned integer
Chris Lattner52523562007-04-24 00:16:04 +0000720 // format it is likely that the high bits are going to be zero.
721 // So, we only write the number of active words.
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000722 unsigned NWords = IV->getValue().getActiveWords();
Chris Lattner52523562007-04-24 00:16:04 +0000723 const uint64_t *RawWords = IV->getValue().getRawData();
Chris Lattner52523562007-04-24 00:16:04 +0000724 for (unsigned i = 0; i != NWords; ++i) {
725 int64_t V = RawWords[i];
726 if (V >= 0)
727 Record.push_back(V << 1);
728 else
729 Record.push_back((-V << 1) | 1);
730 }
731 Code = bitc::CST_CODE_WIDE_INTEGER;
732 }
733 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
734 Code = bitc::CST_CODE_FLOAT;
Dale Johannesenbdad8092007-08-09 22:51:36 +0000735 const Type *Ty = CFP->getType();
Chris Lattnerfdd87902009-10-05 05:54:46 +0000736 if (Ty->isFloatTy() || Ty->isDoubleTy()) {
Dale Johannesen54306fe2008-10-09 18:53:47 +0000737 Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
Chris Lattnerfdd87902009-10-05 05:54:46 +0000738 } else if (Ty->isX86_FP80Ty()) {
Dale Johannesen34aa41c2007-09-26 23:20:33 +0000739 // api needed to prevent premature destruction
Dale Johannesen93eefa02009-03-23 21:16:53 +0000740 // bits are not in the same order as a normal i80 APInt, compensate.
Dale Johannesen54306fe2008-10-09 18:53:47 +0000741 APInt api = CFP->getValueAPF().bitcastToAPInt();
Dale Johannesen34aa41c2007-09-26 23:20:33 +0000742 const uint64_t *p = api.getRawData();
Dale Johannesen93eefa02009-03-23 21:16:53 +0000743 Record.push_back((p[1] << 48) | (p[0] >> 16));
744 Record.push_back(p[0] & 0xffffLL);
Chris Lattnerfdd87902009-10-05 05:54:46 +0000745 } else if (Ty->isFP128Ty() || Ty->isPPC_FP128Ty()) {
Dale Johannesen54306fe2008-10-09 18:53:47 +0000746 APInt api = CFP->getValueAPF().bitcastToAPInt();
Dale Johannesen34aa41c2007-09-26 23:20:33 +0000747 const uint64_t *p = api.getRawData();
Dale Johannesen245dceb2007-09-11 18:32:33 +0000748 Record.push_back(p[0]);
749 Record.push_back(p[1]);
Dale Johannesenbdad8092007-08-09 22:51:36 +0000750 } else {
751 assert (0 && "Unknown FP type!");
Chris Lattner52523562007-04-24 00:16:04 +0000752 }
Chris Lattner036d1bd2007-05-06 00:35:24 +0000753 } else if (isa<ConstantArray>(C) && cast<ConstantArray>(C)->isString()) {
754 // Emit constant strings specially.
Chris Lattnerf25f7102007-05-06 00:53:07 +0000755 unsigned NumOps = C->getNumOperands();
756 // If this is a null-terminated string, use the denser CSTRING encoding.
757 if (C->getOperand(NumOps-1)->isNullValue()) {
758 Code = bitc::CST_CODE_CSTRING;
759 --NumOps; // Don't encode the null, which isn't allowed by char6.
760 } else {
761 Code = bitc::CST_CODE_STRING;
762 AbbrevToUse = String8Abbrev;
763 }
764 bool isCStr7 = Code == bitc::CST_CODE_CSTRING;
765 bool isCStrChar6 = Code == bitc::CST_CODE_CSTRING;
766 for (unsigned i = 0; i != NumOps; ++i) {
Chris Lattner4b6ce8f2007-05-06 00:42:18 +0000767 unsigned char V = cast<ConstantInt>(C->getOperand(i))->getZExtValue();
768 Record.push_back(V);
Chris Lattnerf25f7102007-05-06 00:53:07 +0000769 isCStr7 &= (V & 128) == 0;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000770 if (isCStrChar6)
Chris Lattnerf25f7102007-05-06 00:53:07 +0000771 isCStrChar6 = BitCodeAbbrevOp::isChar6(V);
Chris Lattner4b6ce8f2007-05-06 00:42:18 +0000772 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000773
Chris Lattnerf25f7102007-05-06 00:53:07 +0000774 if (isCStrChar6)
775 AbbrevToUse = CString6Abbrev;
776 else if (isCStr7)
777 AbbrevToUse = CString7Abbrev;
Chris Lattner52523562007-04-24 00:16:04 +0000778 } else if (isa<ConstantArray>(C) || isa<ConstantStruct>(V) ||
779 isa<ConstantVector>(V)) {
780 Code = bitc::CST_CODE_AGGREGATE;
Chris Lattner52523562007-04-24 00:16:04 +0000781 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i)
782 Record.push_back(VE.getValueID(C->getOperand(i)));
Chris Lattnerda5e5d22007-05-05 07:36:14 +0000783 AbbrevToUse = AggregateAbbrev;
Chris Lattner52523562007-04-24 00:16:04 +0000784 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
Chris Lattner1e16bcf72007-04-24 07:07:11 +0000785 switch (CE->getOpcode()) {
786 default:
787 if (Instruction::isCast(CE->getOpcode())) {
788 Code = bitc::CST_CODE_CE_CAST;
789 Record.push_back(GetEncodedCastOpcode(CE->getOpcode()));
790 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
791 Record.push_back(VE.getValueID(C->getOperand(0)));
Chris Lattnerda5e5d22007-05-05 07:36:14 +0000792 AbbrevToUse = CONSTANTS_CE_CAST_Abbrev;
Chris Lattner1e16bcf72007-04-24 07:07:11 +0000793 } else {
794 assert(CE->getNumOperands() == 2 && "Unknown constant expr!");
795 Code = bitc::CST_CODE_CE_BINOP;
796 Record.push_back(GetEncodedBinaryOpcode(CE->getOpcode()));
797 Record.push_back(VE.getValueID(C->getOperand(0)));
798 Record.push_back(VE.getValueID(C->getOperand(1)));
Dan Gohman0ebd6962009-07-20 21:19:07 +0000799 uint64_t Flags = GetOptimizationFlags(CE);
800 if (Flags != 0)
801 Record.push_back(Flags);
Chris Lattner1e16bcf72007-04-24 07:07:11 +0000802 }
803 break;
804 case Instruction::GetElementPtr:
805 Code = bitc::CST_CODE_CE_GEP;
Dan Gohman1639c392009-07-27 21:53:46 +0000806 if (cast<GEPOperator>(C)->isInBounds())
807 Code = bitc::CST_CODE_CE_INBOUNDS_GEP;
Chris Lattner1e16bcf72007-04-24 07:07:11 +0000808 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) {
809 Record.push_back(VE.getTypeID(C->getOperand(i)->getType()));
810 Record.push_back(VE.getValueID(C->getOperand(i)));
811 }
812 break;
813 case Instruction::Select:
814 Code = bitc::CST_CODE_CE_SELECT;
815 Record.push_back(VE.getValueID(C->getOperand(0)));
816 Record.push_back(VE.getValueID(C->getOperand(1)));
817 Record.push_back(VE.getValueID(C->getOperand(2)));
818 break;
819 case Instruction::ExtractElement:
820 Code = bitc::CST_CODE_CE_EXTRACTELT;
821 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
822 Record.push_back(VE.getValueID(C->getOperand(0)));
823 Record.push_back(VE.getValueID(C->getOperand(1)));
824 break;
825 case Instruction::InsertElement:
826 Code = bitc::CST_CODE_CE_INSERTELT;
827 Record.push_back(VE.getValueID(C->getOperand(0)));
828 Record.push_back(VE.getValueID(C->getOperand(1)));
829 Record.push_back(VE.getValueID(C->getOperand(2)));
830 break;
831 case Instruction::ShuffleVector:
Nate Begeman94aa38d2009-02-12 21:28:33 +0000832 // If the return type and argument types are the same, this is a
833 // standard shufflevector instruction. If the types are different,
834 // then the shuffle is widening or truncating the input vectors, and
835 // the argument type must also be encoded.
836 if (C->getType() == C->getOperand(0)->getType()) {
837 Code = bitc::CST_CODE_CE_SHUFFLEVEC;
838 } else {
839 Code = bitc::CST_CODE_CE_SHUFVEC_EX;
840 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
841 }
Chris Lattner1e16bcf72007-04-24 07:07:11 +0000842 Record.push_back(VE.getValueID(C->getOperand(0)));
843 Record.push_back(VE.getValueID(C->getOperand(1)));
844 Record.push_back(VE.getValueID(C->getOperand(2)));
845 break;
846 case Instruction::ICmp:
847 case Instruction::FCmp:
Nick Lewyckya21d3da2009-07-08 03:04:38 +0000848 Code = bitc::CST_CODE_CE_CMP;
Chris Lattner1e16bcf72007-04-24 07:07:11 +0000849 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
850 Record.push_back(VE.getValueID(C->getOperand(0)));
851 Record.push_back(VE.getValueID(C->getOperand(1)));
852 Record.push_back(CE->getPredicate());
853 break;
854 }
Chris Lattner52523562007-04-24 00:16:04 +0000855 } else {
Torok Edwinfbcc6632009-07-14 16:55:14 +0000856 llvm_unreachable("Unknown constant!");
Chris Lattner52523562007-04-24 00:16:04 +0000857 }
858 Stream.EmitRecord(Code, Record, AbbrevToUse);
859 Record.clear();
860 }
861
862 Stream.ExitBlock();
863}
864
865static void WriteModuleConstants(const ValueEnumerator &VE,
866 BitstreamWriter &Stream) {
867 const ValueEnumerator::ValueList &Vals = VE.getValues();
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000868
Chris Lattner52523562007-04-24 00:16:04 +0000869 // Find the first constant to emit, which is the first non-globalvalue value.
870 // We know globalvalues have been emitted by WriteModuleInfo.
871 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
872 if (!isa<GlobalValue>(Vals[i].first)) {
Devang Patel8cca7b42009-08-04 05:01:35 +0000873 WriteConstants(i, Vals.size(), VE, Stream, true);
Chris Lattner52523562007-04-24 00:16:04 +0000874 return;
875 }
876 }
877}
Chris Lattner215e9cd2007-04-23 20:35:01 +0000878
Chris Lattnerdf1233d2007-05-06 00:00:00 +0000879/// PushValueAndType - The file has to encode both the value and type id for
880/// many values, because we need to know what type to create for forward
881/// references. However, most operands are not forward references, so this type
882/// field is not needed.
883///
884/// This function adds V's value ID to Vals. If the value ID is higher than the
885/// instruction ID, then it is a forward reference, and it also includes the
886/// type ID.
Gabor Greif4b79e472009-01-16 18:40:27 +0000887static bool PushValueAndType(const Value *V, unsigned InstID,
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000888 SmallVector<unsigned, 64> &Vals,
Chris Lattnerdf1233d2007-05-06 00:00:00 +0000889 ValueEnumerator &VE) {
890 unsigned ValID = VE.getValueID(V);
891 Vals.push_back(ValID);
892 if (ValID >= InstID) {
893 Vals.push_back(VE.getTypeID(V->getType()));
894 return true;
895 }
896 return false;
897}
898
Chris Lattnere6e364c2007-04-26 05:53:54 +0000899/// WriteInstruction - Emit an instruction to the specified stream.
Chris Lattnerdf1233d2007-05-06 00:00:00 +0000900static void WriteInstruction(const Instruction &I, unsigned InstID,
901 ValueEnumerator &VE, BitstreamWriter &Stream,
Chris Lattnere6e364c2007-04-26 05:53:54 +0000902 SmallVector<unsigned, 64> &Vals) {
Chris Lattnere6e364c2007-04-26 05:53:54 +0000903 unsigned Code = 0;
904 unsigned AbbrevToUse = 0;
Devang Patelaf206b82009-09-18 19:26:43 +0000905 VE.setInstructionID(&I);
Chris Lattnere6e364c2007-04-26 05:53:54 +0000906 switch (I.getOpcode()) {
907 default:
908 if (Instruction::isCast(I.getOpcode())) {
Chris Lattner0a603252007-05-01 02:13:26 +0000909 Code = bitc::FUNC_CODE_INST_CAST;
Chris Lattnerc67e6d92007-05-06 02:38:57 +0000910 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
911 AbbrevToUse = FUNCTION_INST_CAST_ABBREV;
Chris Lattnere6e364c2007-04-26 05:53:54 +0000912 Vals.push_back(VE.getTypeID(I.getType()));
Chris Lattnere9759c22007-05-06 00:21:25 +0000913 Vals.push_back(GetEncodedCastOpcode(I.getOpcode()));
Chris Lattnere6e364c2007-04-26 05:53:54 +0000914 } else {
915 assert(isa<BinaryOperator>(I) && "Unknown instruction!");
Chris Lattner9f35f912007-05-02 04:26:36 +0000916 Code = bitc::FUNC_CODE_INST_BINOP;
Chris Lattnerc67e6d92007-05-06 02:38:57 +0000917 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
918 AbbrevToUse = FUNCTION_INST_BINOP_ABBREV;
Chris Lattnere6e364c2007-04-26 05:53:54 +0000919 Vals.push_back(VE.getValueID(I.getOperand(1)));
Chris Lattnere9759c22007-05-06 00:21:25 +0000920 Vals.push_back(GetEncodedBinaryOpcode(I.getOpcode()));
Dan Gohman0ebd6962009-07-20 21:19:07 +0000921 uint64_t Flags = GetOptimizationFlags(&I);
922 if (Flags != 0) {
923 if (AbbrevToUse == FUNCTION_INST_BINOP_ABBREV)
924 AbbrevToUse = FUNCTION_INST_BINOP_FLAGS_ABBREV;
925 Vals.push_back(Flags);
926 }
Chris Lattnere6e364c2007-04-26 05:53:54 +0000927 }
928 break;
Chris Lattner0a603252007-05-01 02:13:26 +0000929
930 case Instruction::GetElementPtr:
931 Code = bitc::FUNC_CODE_INST_GEP;
Dan Gohman1639c392009-07-27 21:53:46 +0000932 if (cast<GEPOperator>(&I)->isInBounds())
933 Code = bitc::FUNC_CODE_INST_INBOUNDS_GEP;
Chris Lattnerdf1233d2007-05-06 00:00:00 +0000934 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
935 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
Chris Lattner0a603252007-05-01 02:13:26 +0000936 break;
Dan Gohmanca0256a2008-05-31 19:11:15 +0000937 case Instruction::ExtractValue: {
Dan Gohman30499842008-05-23 01:55:30 +0000938 Code = bitc::FUNC_CODE_INST_EXTRACTVAL;
Dan Gohmanca0256a2008-05-31 19:11:15 +0000939 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
940 const ExtractValueInst *EVI = cast<ExtractValueInst>(&I);
941 for (const unsigned *i = EVI->idx_begin(), *e = EVI->idx_end(); i != e; ++i)
942 Vals.push_back(*i);
Dan Gohman30499842008-05-23 01:55:30 +0000943 break;
Dan Gohmanca0256a2008-05-31 19:11:15 +0000944 }
945 case Instruction::InsertValue: {
Dan Gohman30499842008-05-23 01:55:30 +0000946 Code = bitc::FUNC_CODE_INST_INSERTVAL;
Dan Gohmanca0256a2008-05-31 19:11:15 +0000947 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
948 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
949 const InsertValueInst *IVI = cast<InsertValueInst>(&I);
950 for (const unsigned *i = IVI->idx_begin(), *e = IVI->idx_end(); i != e; ++i)
951 Vals.push_back(*i);
Dan Gohman30499842008-05-23 01:55:30 +0000952 break;
Dan Gohmanca0256a2008-05-31 19:11:15 +0000953 }
Chris Lattner0a603252007-05-01 02:13:26 +0000954 case Instruction::Select:
Dan Gohmanc5d28922008-09-16 01:01:33 +0000955 Code = bitc::FUNC_CODE_INST_VSELECT;
Chris Lattnere9759c22007-05-06 00:21:25 +0000956 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
Chris Lattner0a603252007-05-01 02:13:26 +0000957 Vals.push_back(VE.getValueID(I.getOperand(2)));
Dan Gohmanc5d28922008-09-16 01:01:33 +0000958 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
Chris Lattner0a603252007-05-01 02:13:26 +0000959 break;
960 case Instruction::ExtractElement:
961 Code = bitc::FUNC_CODE_INST_EXTRACTELT;
Chris Lattnere9759c22007-05-06 00:21:25 +0000962 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
Chris Lattner0a603252007-05-01 02:13:26 +0000963 Vals.push_back(VE.getValueID(I.getOperand(1)));
964 break;
965 case Instruction::InsertElement:
966 Code = bitc::FUNC_CODE_INST_INSERTELT;
Chris Lattnere9759c22007-05-06 00:21:25 +0000967 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
Chris Lattner0a603252007-05-01 02:13:26 +0000968 Vals.push_back(VE.getValueID(I.getOperand(1)));
969 Vals.push_back(VE.getValueID(I.getOperand(2)));
970 break;
971 case Instruction::ShuffleVector:
972 Code = bitc::FUNC_CODE_INST_SHUFFLEVEC;
Chris Lattnere9759c22007-05-06 00:21:25 +0000973 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
Chris Lattner0a603252007-05-01 02:13:26 +0000974 Vals.push_back(VE.getValueID(I.getOperand(1)));
975 Vals.push_back(VE.getValueID(I.getOperand(2)));
976 break;
977 case Instruction::ICmp:
978 case Instruction::FCmp:
Nick Lewyckya21d3da2009-07-08 03:04:38 +0000979 // compare returning Int1Ty or vector of Int1Ty
980 Code = bitc::FUNC_CODE_INST_CMP2;
Chris Lattnerdf1233d2007-05-06 00:00:00 +0000981 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
Chris Lattner0a603252007-05-01 02:13:26 +0000982 Vals.push_back(VE.getValueID(I.getOperand(1)));
983 Vals.push_back(cast<CmpInst>(I).getPredicate());
984 break;
985
Daniel Dunbar7d6781b2009-09-20 02:20:51 +0000986 case Instruction::Ret:
Devang Patelbbfd8742008-02-26 01:29:32 +0000987 {
988 Code = bitc::FUNC_CODE_INST_RET;
989 unsigned NumOperands = I.getNumOperands();
Devang Patelbbfd8742008-02-26 01:29:32 +0000990 if (NumOperands == 0)
991 AbbrevToUse = FUNCTION_INST_RET_VOID_ABBREV;
992 else if (NumOperands == 1) {
993 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
994 AbbrevToUse = FUNCTION_INST_RET_VAL_ABBREV;
995 } else {
996 for (unsigned i = 0, e = NumOperands; i != e; ++i)
997 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
998 }
999 }
Chris Lattner0a603252007-05-01 02:13:26 +00001000 break;
1001 case Instruction::Br:
Gabor Greif1933b002009-01-30 18:27:21 +00001002 {
1003 Code = bitc::FUNC_CODE_INST_BR;
1004 BranchInst &II(cast<BranchInst>(I));
1005 Vals.push_back(VE.getValueID(II.getSuccessor(0)));
1006 if (II.isConditional()) {
1007 Vals.push_back(VE.getValueID(II.getSuccessor(1)));
1008 Vals.push_back(VE.getValueID(II.getCondition()));
1009 }
Chris Lattner0a603252007-05-01 02:13:26 +00001010 }
1011 break;
1012 case Instruction::Switch:
1013 Code = bitc::FUNC_CODE_INST_SWITCH;
1014 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
Chris Lattner0a603252007-05-01 02:13:26 +00001015 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
1016 Vals.push_back(VE.getValueID(I.getOperand(i)));
1017 break;
Chris Lattnerb811e952007-05-01 07:03:37 +00001018 case Instruction::Invoke: {
Gabor Greif4b79e472009-01-16 18:40:27 +00001019 const InvokeInst *II = cast<InvokeInst>(&I);
1020 const Value *Callee(II->getCalledValue());
1021 const PointerType *PTy = cast<PointerType>(Callee->getType());
Chris Lattner4c0a6d62007-05-08 05:38:01 +00001022 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
Chris Lattner0a603252007-05-01 02:13:26 +00001023 Code = bitc::FUNC_CODE_INST_INVOKE;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001024
Devang Patel4c758ea2008-09-25 21:00:45 +00001025 Vals.push_back(VE.getAttributeID(II->getAttributes()));
Duncan Sandsad0ea2d2007-11-27 13:23:08 +00001026 Vals.push_back(II->getCallingConv());
Gabor Greif6ecd6f42009-01-07 22:39:29 +00001027 Vals.push_back(VE.getValueID(II->getNormalDest()));
1028 Vals.push_back(VE.getValueID(II->getUnwindDest()));
Gabor Greif4b79e472009-01-16 18:40:27 +00001029 PushValueAndType(Callee, InstID, Vals, VE);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001030
Chris Lattner0a603252007-05-01 02:13:26 +00001031 // Emit value #'s for the fixed parameters.
Chris Lattner0a603252007-05-01 02:13:26 +00001032 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
Gabor Greif2d60e1e2009-09-03 02:02:59 +00001033 Vals.push_back(VE.getValueID(I.getOperand(i+3))); // fixed param.
Chris Lattner0a603252007-05-01 02:13:26 +00001034
1035 // Emit type/value pairs for varargs params.
1036 if (FTy->isVarArg()) {
Gabor Greif2d60e1e2009-09-03 02:02:59 +00001037 for (unsigned i = 3+FTy->getNumParams(), e = I.getNumOperands();
Chris Lattnerdf1233d2007-05-06 00:00:00 +00001038 i != e; ++i)
1039 PushValueAndType(I.getOperand(i), InstID, Vals, VE); // vararg
Chris Lattner0a603252007-05-01 02:13:26 +00001040 }
1041 break;
Chris Lattnerb811e952007-05-01 07:03:37 +00001042 }
Chris Lattnere6e364c2007-04-26 05:53:54 +00001043 case Instruction::Unwind:
1044 Code = bitc::FUNC_CODE_INST_UNWIND;
1045 break;
1046 case Instruction::Unreachable:
1047 Code = bitc::FUNC_CODE_INST_UNREACHABLE;
Chris Lattnercc6d4c92007-05-06 01:28:01 +00001048 AbbrevToUse = FUNCTION_INST_UNREACHABLE_ABBREV;
Chris Lattnere6e364c2007-04-26 05:53:54 +00001049 break;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001050
Chris Lattner0a603252007-05-01 02:13:26 +00001051 case Instruction::PHI:
1052 Code = bitc::FUNC_CODE_INST_PHI;
1053 Vals.push_back(VE.getTypeID(I.getType()));
Chris Lattner0a603252007-05-01 02:13:26 +00001054 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
1055 Vals.push_back(VE.getValueID(I.getOperand(i)));
1056 break;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001057
Chris Lattner0a603252007-05-01 02:13:26 +00001058 case Instruction::Alloca:
1059 Code = bitc::FUNC_CODE_INST_ALLOCA;
1060 Vals.push_back(VE.getTypeID(I.getType()));
1061 Vals.push_back(VE.getValueID(I.getOperand(0))); // size.
1062 Vals.push_back(Log2_32(cast<AllocaInst>(I).getAlignment())+1);
1063 break;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001064
Chris Lattner0a603252007-05-01 02:13:26 +00001065 case Instruction::Load:
1066 Code = bitc::FUNC_CODE_INST_LOAD;
Chris Lattnerdf1233d2007-05-06 00:00:00 +00001067 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) // ptr
1068 AbbrevToUse = FUNCTION_INST_LOAD_ABBREV;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001069
Chris Lattner0a603252007-05-01 02:13:26 +00001070 Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1);
1071 Vals.push_back(cast<LoadInst>(I).isVolatile());
1072 break;
1073 case Instruction::Store:
Christopher Lamb54dd24c2007-12-11 08:59:05 +00001074 Code = bitc::FUNC_CODE_INST_STORE2;
1075 PushValueAndType(I.getOperand(1), InstID, Vals, VE); // ptrty + ptr
1076 Vals.push_back(VE.getValueID(I.getOperand(0))); // val.
Chris Lattner0a603252007-05-01 02:13:26 +00001077 Vals.push_back(Log2_32(cast<StoreInst>(I).getAlignment())+1);
1078 Vals.push_back(cast<StoreInst>(I).isVolatile());
1079 break;
1080 case Instruction::Call: {
Chris Lattner4c0a6d62007-05-08 05:38:01 +00001081 const PointerType *PTy = cast<PointerType>(I.getOperand(0)->getType());
1082 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
1083
Chris Lattner0a603252007-05-01 02:13:26 +00001084 Code = bitc::FUNC_CODE_INST_CALL;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001085
Duncan Sandsad0ea2d2007-11-27 13:23:08 +00001086 const CallInst *CI = cast<CallInst>(&I);
Devang Patel4c758ea2008-09-25 21:00:45 +00001087 Vals.push_back(VE.getAttributeID(CI->getAttributes()));
Duncan Sandsad0ea2d2007-11-27 13:23:08 +00001088 Vals.push_back((CI->getCallingConv() << 1) | unsigned(CI->isTailCall()));
1089 PushValueAndType(CI->getOperand(0), InstID, Vals, VE); // Callee
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001090
Chris Lattner0a603252007-05-01 02:13:26 +00001091 // Emit value #'s for the fixed parameters.
Chris Lattner0a603252007-05-01 02:13:26 +00001092 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
1093 Vals.push_back(VE.getValueID(I.getOperand(i+1))); // fixed param.
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001094
Chris Lattnerb811e952007-05-01 07:03:37 +00001095 // Emit type/value pairs for varargs params.
1096 if (FTy->isVarArg()) {
1097 unsigned NumVarargs = I.getNumOperands()-1-FTy->getNumParams();
Chris Lattnerb811e952007-05-01 07:03:37 +00001098 for (unsigned i = I.getNumOperands()-NumVarargs, e = I.getNumOperands();
Chris Lattnerdf1233d2007-05-06 00:00:00 +00001099 i != e; ++i)
1100 PushValueAndType(I.getOperand(i), InstID, Vals, VE); // varargs
Chris Lattner0a603252007-05-01 02:13:26 +00001101 }
1102 break;
Chris Lattnerb811e952007-05-01 07:03:37 +00001103 }
Chris Lattner0a603252007-05-01 02:13:26 +00001104 case Instruction::VAArg:
1105 Code = bitc::FUNC_CODE_INST_VAARG;
1106 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); // valistty
1107 Vals.push_back(VE.getValueID(I.getOperand(0))); // valist.
1108 Vals.push_back(VE.getTypeID(I.getType())); // restype.
1109 break;
Chris Lattnere6e364c2007-04-26 05:53:54 +00001110 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001111
Chris Lattnere6e364c2007-04-26 05:53:54 +00001112 Stream.EmitRecord(Code, Vals, AbbrevToUse);
1113 Vals.clear();
1114}
1115
Chris Lattnerfb6f9402007-05-01 02:14:57 +00001116// Emit names for globals/functions etc.
1117static void WriteValueSymbolTable(const ValueSymbolTable &VST,
1118 const ValueEnumerator &VE,
1119 BitstreamWriter &Stream) {
1120 if (VST.empty()) return;
Chris Lattnere760d6f2007-05-05 01:26:50 +00001121 Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4);
Chris Lattner2eae59f2007-05-04 20:34:50 +00001122
Chris Lattnerfb6f9402007-05-01 02:14:57 +00001123 // FIXME: Set up the abbrev, we know how many values there are!
1124 // FIXME: We know if the type names can use 7-bit ascii.
1125 SmallVector<unsigned, 64> NameVals;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001126
Chris Lattnerfb6f9402007-05-01 02:14:57 +00001127 for (ValueSymbolTable::const_iterator SI = VST.begin(), SE = VST.end();
1128 SI != SE; ++SI) {
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001129
Chris Lattner4d925982007-05-04 20:52:02 +00001130 const ValueName &Name = *SI;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001131
Chris Lattner4d925982007-05-04 20:52:02 +00001132 // Figure out the encoding to use for the name.
1133 bool is7Bit = true;
Chris Lattnere760d6f2007-05-05 01:26:50 +00001134 bool isChar6 = true;
1135 for (const char *C = Name.getKeyData(), *E = C+Name.getKeyLength();
1136 C != E; ++C) {
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001137 if (isChar6)
Chris Lattnere760d6f2007-05-05 01:26:50 +00001138 isChar6 = BitCodeAbbrevOp::isChar6(*C);
1139 if ((unsigned char)*C & 128) {
Chris Lattner4d925982007-05-04 20:52:02 +00001140 is7Bit = false;
Chris Lattnere760d6f2007-05-05 01:26:50 +00001141 break; // don't bother scanning the rest.
Chris Lattner4d925982007-05-04 20:52:02 +00001142 }
Chris Lattnere760d6f2007-05-05 01:26:50 +00001143 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001144
Chris Lattnera0987962007-05-04 21:31:13 +00001145 unsigned AbbrevToUse = VST_ENTRY_8_ABBREV;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001146
Chris Lattnera0987962007-05-04 21:31:13 +00001147 // VST_ENTRY: [valueid, namechar x N]
1148 // VST_BBENTRY: [bbid, namechar x N]
Chris Lattner6be58c62007-05-03 22:18:21 +00001149 unsigned Code;
Chris Lattner694285c2009-08-04 23:07:12 +00001150 if (isa<BasicBlock>(SI->getValue())) {
Chris Lattner6be58c62007-05-03 22:18:21 +00001151 Code = bitc::VST_CODE_BBENTRY;
Chris Lattnere760d6f2007-05-05 01:26:50 +00001152 if (isChar6)
1153 AbbrevToUse = VST_BBENTRY_6_ABBREV;
Chris Lattner6be58c62007-05-03 22:18:21 +00001154 } else {
1155 Code = bitc::VST_CODE_ENTRY;
Chris Lattnere760d6f2007-05-05 01:26:50 +00001156 if (isChar6)
1157 AbbrevToUse = VST_ENTRY_6_ABBREV;
1158 else if (is7Bit)
1159 AbbrevToUse = VST_ENTRY_7_ABBREV;
Chris Lattner6be58c62007-05-03 22:18:21 +00001160 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001161
Chris Lattner6be58c62007-05-03 22:18:21 +00001162 NameVals.push_back(VE.getValueID(SI->getValue()));
Chris Lattner4d925982007-05-04 20:52:02 +00001163 for (const char *P = Name.getKeyData(),
1164 *E = Name.getKeyData()+Name.getKeyLength(); P != E; ++P)
Chris Lattnerfb6f9402007-05-01 02:14:57 +00001165 NameVals.push_back((unsigned char)*P);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001166
Chris Lattnerfb6f9402007-05-01 02:14:57 +00001167 // Emit the finished record.
Chris Lattner6be58c62007-05-03 22:18:21 +00001168 Stream.EmitRecord(Code, NameVals, AbbrevToUse);
Chris Lattnerfb6f9402007-05-01 02:14:57 +00001169 NameVals.clear();
1170 }
1171 Stream.ExitBlock();
1172}
1173
Chris Lattner5f640b92007-04-26 03:50:57 +00001174/// WriteFunction - Emit a function body to the module stream.
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001175static void WriteFunction(const Function &F, ValueEnumerator &VE,
Chris Lattner831d4202007-04-26 03:27:58 +00001176 BitstreamWriter &Stream) {
Chris Lattnerc67e6d92007-05-06 02:38:57 +00001177 Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4);
Chris Lattner5f640b92007-04-26 03:50:57 +00001178 VE.incorporateFunction(F);
Chris Lattnere6e364c2007-04-26 05:53:54 +00001179
1180 SmallVector<unsigned, 64> Vals;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001181
Chris Lattnere6e364c2007-04-26 05:53:54 +00001182 // Emit the number of basic blocks, so the reader can create them ahead of
1183 // time.
1184 Vals.push_back(VE.getBasicBlocks().size());
1185 Stream.EmitRecord(bitc::FUNC_CODE_DECLAREBLOCKS, Vals);
1186 Vals.clear();
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001187
Chris Lattnere6e364c2007-04-26 05:53:54 +00001188 // If there are function-local constants, emit them now.
1189 unsigned CstStart, CstEnd;
1190 VE.getFunctionConstantRange(CstStart, CstEnd);
Devang Patel8cca7b42009-08-04 05:01:35 +00001191 WriteConstants(CstStart, CstEnd, VE, Stream, false);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001192
1193 // Keep a running idea of what the instruction ID is.
Chris Lattnerdf1233d2007-05-06 00:00:00 +00001194 unsigned InstID = CstEnd;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001195
Chris Lattnere6e364c2007-04-26 05:53:54 +00001196 // Finally, emit all the instructions, in order.
Nick Lewycky4d43d3c2008-04-25 16:53:59 +00001197 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
Chris Lattnerdf1233d2007-05-06 00:00:00 +00001198 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
1199 I != E; ++I) {
1200 WriteInstruction(*I, InstID, VE, Stream, Vals);
Owen Anderson55f1c092009-08-13 21:58:54 +00001201 if (I->getType() != Type::getVoidTy(F.getContext()))
Chris Lattnerdf1233d2007-05-06 00:00:00 +00001202 ++InstID;
1203 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001204
Chris Lattnerfb6f9402007-05-01 02:14:57 +00001205 // Emit names for all the instructions etc.
1206 WriteValueSymbolTable(F.getValueSymbolTable(), VE, Stream);
Devang Patelaf206b82009-09-18 19:26:43 +00001207
1208 WriteMetadataAttachment(F, VE, Stream);
Chris Lattner5f640b92007-04-26 03:50:57 +00001209 VE.purgeFunction();
Chris Lattnere6e364c2007-04-26 05:53:54 +00001210 Stream.ExitBlock();
Chris Lattner831d4202007-04-26 03:27:58 +00001211}
1212
1213/// WriteTypeSymbolTable - Emit a block for the specified type symtab.
1214static void WriteTypeSymbolTable(const TypeSymbolTable &TST,
1215 const ValueEnumerator &VE,
1216 BitstreamWriter &Stream) {
1217 if (TST.empty()) return;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001218
Chris Lattner831d4202007-04-26 03:27:58 +00001219 Stream.EnterSubblock(bitc::TYPE_SYMTAB_BLOCK_ID, 3);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001220
Chris Lattnerde05f6b2007-05-05 00:47:19 +00001221 // 7-bit fixed width VST_CODE_ENTRY strings.
1222 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1223 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
1224 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
1225 Log2_32_Ceil(VE.getTypes().size()+1)));
1226 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1227 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
1228 unsigned V7Abbrev = Stream.EmitAbbrev(Abbv);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001229
Chris Lattner831d4202007-04-26 03:27:58 +00001230 SmallVector<unsigned, 64> NameVals;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001231
1232 for (TypeSymbolTable::const_iterator TI = TST.begin(), TE = TST.end();
Chris Lattner831d4202007-04-26 03:27:58 +00001233 TI != TE; ++TI) {
Chris Lattnerde05f6b2007-05-05 00:47:19 +00001234 // TST_ENTRY: [typeid, namechar x N]
Chris Lattner831d4202007-04-26 03:27:58 +00001235 NameVals.push_back(VE.getTypeID(TI->second));
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001236
Chris Lattner831d4202007-04-26 03:27:58 +00001237 const std::string &Str = TI->first;
Chris Lattnerde05f6b2007-05-05 00:47:19 +00001238 bool is7Bit = true;
1239 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
1240 NameVals.push_back((unsigned char)Str[i]);
1241 if (Str[i] & 128)
1242 is7Bit = false;
1243 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001244
Chris Lattner831d4202007-04-26 03:27:58 +00001245 // Emit the finished record.
Chris Lattnerde05f6b2007-05-05 00:47:19 +00001246 Stream.EmitRecord(bitc::VST_CODE_ENTRY, NameVals, is7Bit ? V7Abbrev : 0);
Chris Lattner831d4202007-04-26 03:27:58 +00001247 NameVals.clear();
1248 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001249
Chris Lattner831d4202007-04-26 03:27:58 +00001250 Stream.ExitBlock();
1251}
1252
Chris Lattner702658c2007-05-04 18:26:27 +00001253// Emit blockinfo, which defines the standard abbreviations etc.
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001254static void WriteBlockInfo(const ValueEnumerator &VE, BitstreamWriter &Stream) {
Chris Lattner702658c2007-05-04 18:26:27 +00001255 // We only want to emit block info records for blocks that have multiple
1256 // instances: CONSTANTS_BLOCK, FUNCTION_BLOCK and VALUE_SYMTAB_BLOCK. Other
1257 // blocks can defined their abbrevs inline.
Chris Lattner982ec1e2007-05-05 00:17:00 +00001258 Stream.EnterBlockInfoBlock(2);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001259
Chris Lattner982ec1e2007-05-05 00:17:00 +00001260 { // 8-bit fixed-width VST_ENTRY/VST_BBENTRY strings.
1261 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1262 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3));
1263 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1264 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1265 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001266 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
Chris Lattner982ec1e2007-05-05 00:17:00 +00001267 Abbv) != VST_ENTRY_8_ABBREV)
Torok Edwinfbcc6632009-07-14 16:55:14 +00001268 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattner982ec1e2007-05-05 00:17:00 +00001269 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001270
Chris Lattner982ec1e2007-05-05 00:17:00 +00001271 { // 7-bit fixed width VST_ENTRY strings.
1272 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1273 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
1274 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1275 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1276 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
1277 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1278 Abbv) != VST_ENTRY_7_ABBREV)
Torok Edwinfbcc6632009-07-14 16:55:14 +00001279 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattner982ec1e2007-05-05 00:17:00 +00001280 }
Chris Lattnere760d6f2007-05-05 01:26:50 +00001281 { // 6-bit char6 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::Char6));
1287 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1288 Abbv) != VST_ENTRY_6_ABBREV)
Torok Edwinfbcc6632009-07-14 16:55:14 +00001289 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnere760d6f2007-05-05 01:26:50 +00001290 }
1291 { // 6-bit char6 VST_BBENTRY strings.
Chris Lattner982ec1e2007-05-05 00:17:00 +00001292 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1293 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_BBENTRY));
1294 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1295 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Chris Lattnere760d6f2007-05-05 01:26:50 +00001296 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
Chris Lattner982ec1e2007-05-05 00:17:00 +00001297 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
Chris Lattnere760d6f2007-05-05 01:26:50 +00001298 Abbv) != VST_BBENTRY_6_ABBREV)
Torok Edwinfbcc6632009-07-14 16:55:14 +00001299 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattner982ec1e2007-05-05 00:17:00 +00001300 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001301
1302
1303
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001304 { // SETTYPE abbrev for CONSTANTS_BLOCK.
1305 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1306 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE));
1307 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
1308 Log2_32_Ceil(VE.getTypes().size()+1)));
1309 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1310 Abbv) != CONSTANTS_SETTYPE_ABBREV)
Torok Edwinfbcc6632009-07-14 16:55:14 +00001311 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001312 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001313
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001314 { // INTEGER abbrev for CONSTANTS_BLOCK.
1315 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1316 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_INTEGER));
1317 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1318 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1319 Abbv) != CONSTANTS_INTEGER_ABBREV)
Torok Edwinfbcc6632009-07-14 16:55:14 +00001320 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001321 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001322
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001323 { // CE_CAST abbrev for CONSTANTS_BLOCK.
1324 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1325 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CE_CAST));
1326 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // cast opc
1327 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // typeid
1328 Log2_32_Ceil(VE.getTypes().size()+1)));
1329 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id
1330
1331 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1332 Abbv) != CONSTANTS_CE_CAST_Abbrev)
Torok Edwinfbcc6632009-07-14 16:55:14 +00001333 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001334 }
1335 { // NULL abbrev for CONSTANTS_BLOCK.
1336 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1337 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_NULL));
1338 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1339 Abbv) != CONSTANTS_NULL_Abbrev)
Torok Edwinfbcc6632009-07-14 16:55:14 +00001340 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001341 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001342
Chris Lattnerb80751d2007-05-05 07:44:49 +00001343 // FIXME: This should only use space for first class types!
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001344
Chris Lattnerb80751d2007-05-05 07:44:49 +00001345 { // INST_LOAD abbrev for FUNCTION_BLOCK.
1346 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1347 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_LOAD));
Chris Lattnerb80751d2007-05-05 07:44:49 +00001348 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Ptr
1349 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // Align
1350 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // volatile
1351 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1352 Abbv) != FUNCTION_INST_LOAD_ABBREV)
Torok Edwinfbcc6632009-07-14 16:55:14 +00001353 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnerb80751d2007-05-05 07:44:49 +00001354 }
Chris Lattnerc67e6d92007-05-06 02:38:57 +00001355 { // INST_BINOP abbrev for FUNCTION_BLOCK.
1356 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1357 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
1358 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
1359 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
1360 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
1361 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1362 Abbv) != FUNCTION_INST_BINOP_ABBREV)
Torok Edwinfbcc6632009-07-14 16:55:14 +00001363 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnerc67e6d92007-05-06 02:38:57 +00001364 }
Dan Gohman0ebd6962009-07-20 21:19:07 +00001365 { // INST_BINOP_FLAGS 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 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); // flags
1372 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1373 Abbv) != FUNCTION_INST_BINOP_FLAGS_ABBREV)
1374 llvm_unreachable("Unexpected abbrev ordering!");
1375 }
Chris Lattnerc67e6d92007-05-06 02:38:57 +00001376 { // INST_CAST abbrev for FUNCTION_BLOCK.
1377 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1378 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_CAST));
1379 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpVal
1380 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
1381 Log2_32_Ceil(VE.getTypes().size()+1)));
1382 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
1383 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1384 Abbv) != FUNCTION_INST_CAST_ABBREV)
Torok Edwinfbcc6632009-07-14 16:55:14 +00001385 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnerc67e6d92007-05-06 02:38:57 +00001386 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001387
Chris Lattnercc6d4c92007-05-06 01:28:01 +00001388 { // INST_RET abbrev for FUNCTION_BLOCK.
1389 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1390 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
1391 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1392 Abbv) != FUNCTION_INST_RET_VOID_ABBREV)
Torok Edwinfbcc6632009-07-14 16:55:14 +00001393 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnercc6d4c92007-05-06 01:28:01 +00001394 }
1395 { // INST_RET abbrev for FUNCTION_BLOCK.
1396 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1397 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
1398 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ValID
1399 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1400 Abbv) != FUNCTION_INST_RET_VAL_ABBREV)
Torok Edwinfbcc6632009-07-14 16:55:14 +00001401 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnercc6d4c92007-05-06 01:28:01 +00001402 }
1403 { // INST_UNREACHABLE abbrev for FUNCTION_BLOCK.
1404 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1405 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_UNREACHABLE));
1406 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1407 Abbv) != FUNCTION_INST_UNREACHABLE_ABBREV)
Torok Edwinfbcc6632009-07-14 16:55:14 +00001408 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnercc6d4c92007-05-06 01:28:01 +00001409 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001410
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001411 Stream.ExitBlock();
1412}
1413
1414
1415/// WriteModule - Emit the specified module to the bitstream.
1416static void WriteModule(const Module *M, BitstreamWriter &Stream) {
1417 Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001418
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001419 // Emit the version number if it is non-zero.
1420 if (CurVersion) {
1421 SmallVector<unsigned, 1> Vals;
1422 Vals.push_back(CurVersion);
1423 Stream.EmitRecord(bitc::MODULE_CODE_VERSION, Vals);
1424 }
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001425
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001426 // Analyze the module, enumerating globals, functions, etc.
1427 ValueEnumerator VE(M);
1428
1429 // Emit blockinfo, which defines the standard abbreviations etc.
1430 WriteBlockInfo(VE, Stream);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001431
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001432 // Emit information about parameter attributes.
Devang Patel4c758ea2008-09-25 21:00:45 +00001433 WriteAttributeTable(VE, Stream);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001434
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001435 // Emit information describing all of the types in the module.
1436 WriteTypeTable(VE, Stream);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001437
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001438 // Emit top-level description of module, including target triple, inline asm,
1439 // descriptors for global variables, and function prototype info.
1440 WriteModuleInfo(M, VE, Stream);
Devang Patel7428d8a2009-07-22 17:43:22 +00001441
Devang Patele059ba6e2009-07-23 01:07:34 +00001442 // Emit constants.
1443 WriteModuleConstants(VE, Stream);
1444
Devang Patel8cca7b42009-08-04 05:01:35 +00001445 // Emit metadata.
1446 WriteModuleMetadata(VE, Stream);
1447
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001448 // Emit function bodies.
1449 for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
1450 if (!I->isDeclaration())
1451 WriteFunction(*I, VE, Stream);
Devang Patelaf206b82009-09-18 19:26:43 +00001452
1453 // Emit metadata.
1454 WriteModuleMetadataStore(M, VE, Stream);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001455
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001456 // Emit the type symbol table information.
1457 WriteTypeSymbolTable(M->getTypeSymbolTable(), VE, Stream);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001458
Chris Lattnerda5e5d22007-05-05 07:36:14 +00001459 // Emit names for globals/functions etc.
1460 WriteValueSymbolTable(M->getValueSymbolTable(), VE, Stream);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001461
Chris Lattner702658c2007-05-04 18:26:27 +00001462 Stream.ExitBlock();
1463}
1464
Chris Lattnera660f4b2008-07-09 05:14:23 +00001465/// EmitDarwinBCHeader - If generating a bc file on darwin, we have to emit a
1466/// header and trailer to make it compatible with the system archiver. To do
1467/// this we emit the following header, and then emit a trailer that pads the
1468/// file out to be a multiple of 16 bytes.
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001469///
Chris Lattnera660f4b2008-07-09 05:14:23 +00001470/// struct bc_header {
1471/// uint32_t Magic; // 0x0B17C0DE
1472/// uint32_t Version; // Version, currently always 0.
1473/// uint32_t BitcodeOffset; // Offset to traditional bitcode file.
1474/// uint32_t BitcodeSize; // Size of traditional bitcode file.
1475/// uint32_t CPUType; // CPU specifier.
1476/// ... potentially more later ...
1477/// };
1478enum {
1479 DarwinBCSizeFieldOffset = 3*4, // Offset to bitcode_size.
1480 DarwinBCHeaderSize = 5*4
1481};
1482
1483static void EmitDarwinBCHeader(BitstreamWriter &Stream,
1484 const std::string &TT) {
1485 unsigned CPUType = ~0U;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001486
Chris Lattnera660f4b2008-07-09 05:14:23 +00001487 // Match x86_64-*, i[3-9]86-*, powerpc-*, powerpc64-*. The CPUType is a
1488 // magic number from /usr/include/mach/machine.h. It is ok to reproduce the
1489 // specific constants here because they are implicitly part of the Darwin ABI.
1490 enum {
1491 DARWIN_CPU_ARCH_ABI64 = 0x01000000,
1492 DARWIN_CPU_TYPE_X86 = 7,
1493 DARWIN_CPU_TYPE_POWERPC = 18
1494 };
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001495
Chris Lattnera660f4b2008-07-09 05:14:23 +00001496 if (TT.find("x86_64-") == 0)
1497 CPUType = DARWIN_CPU_TYPE_X86 | DARWIN_CPU_ARCH_ABI64;
1498 else if (TT.size() >= 5 && TT[0] == 'i' && TT[2] == '8' && TT[3] == '6' &&
1499 TT[4] == '-' && TT[1] - '3' < 6)
1500 CPUType = DARWIN_CPU_TYPE_X86;
1501 else if (TT.find("powerpc-") == 0)
1502 CPUType = DARWIN_CPU_TYPE_POWERPC;
1503 else if (TT.find("powerpc64-") == 0)
1504 CPUType = DARWIN_CPU_TYPE_POWERPC | DARWIN_CPU_ARCH_ABI64;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001505
Chris Lattnera660f4b2008-07-09 05:14:23 +00001506 // Traditional Bitcode starts after header.
1507 unsigned BCOffset = DarwinBCHeaderSize;
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001508
Chris Lattnera660f4b2008-07-09 05:14:23 +00001509 Stream.Emit(0x0B17C0DE, 32);
1510 Stream.Emit(0 , 32); // Version.
1511 Stream.Emit(BCOffset , 32);
1512 Stream.Emit(0 , 32); // Filled in later.
1513 Stream.Emit(CPUType , 32);
1514}
1515
1516/// EmitDarwinBCTrailer - Emit the darwin epilog after the bitcode file and
1517/// finalize the header.
1518static void EmitDarwinBCTrailer(BitstreamWriter &Stream, unsigned BufferSize) {
1519 // Update the size field in the header.
1520 Stream.BackpatchWord(DarwinBCSizeFieldOffset, BufferSize-DarwinBCHeaderSize);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001521
Chris Lattnera660f4b2008-07-09 05:14:23 +00001522 // If the file is not a multiple of 16 bytes, insert dummy padding.
1523 while (BufferSize & 15) {
1524 Stream.Emit(0, 8);
1525 ++BufferSize;
1526 }
1527}
1528
Chris Lattner702658c2007-05-04 18:26:27 +00001529
Chris Lattnerc1d10d62007-04-22 06:24:45 +00001530/// WriteBitcodeToFile - Write the specified module to the specified output
1531/// stream.
Daniel Dunbar890d0de2008-10-22 17:39:14 +00001532void llvm::WriteBitcodeToFile(const Module *M, raw_ostream &Out) {
Chris Lattnerc1d10d62007-04-22 06:24:45 +00001533 std::vector<unsigned char> Buffer;
1534 BitstreamWriter Stream(Buffer);
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001535
Chris Lattnerc1d10d62007-04-22 06:24:45 +00001536 Buffer.reserve(256*1024);
Chris Lattneraf4c0bf2008-12-19 18:37:59 +00001537
1538 WriteBitcodeToStream( M, Stream );
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001539
Chris Lattneraf4c0bf2008-12-19 18:37:59 +00001540 // If writing to stdout, set binary mode.
1541 if (&llvm::outs() == &Out)
1542 sys::Program::ChangeStdoutToBinary();
1543
1544 // Write the generated bitstream to "Out".
1545 Out.write((char*)&Buffer.front(), Buffer.size());
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001546
Chris Lattneraf4c0bf2008-12-19 18:37:59 +00001547 // Make sure it hits disk now.
1548 Out.flush();
1549}
1550
1551/// WriteBitcodeToStream - Write the specified module to the specified output
1552/// stream.
1553void llvm::WriteBitcodeToStream(const Module *M, BitstreamWriter &Stream) {
Chris Lattnera660f4b2008-07-09 05:14:23 +00001554 // If this is darwin, emit a file header and trailer if needed.
1555 bool isDarwin = M->getTargetTriple().find("-darwin") != std::string::npos;
1556 if (isDarwin)
1557 EmitDarwinBCHeader(Stream, M->getTargetTriple());
Daniel Dunbar7d6781b2009-09-20 02:20:51 +00001558
Chris Lattnerc1d10d62007-04-22 06:24:45 +00001559 // Emit the file header.
1560 Stream.Emit((unsigned)'B', 8);
1561 Stream.Emit((unsigned)'C', 8);
1562 Stream.Emit(0x0, 4);
1563 Stream.Emit(0xC, 4);
1564 Stream.Emit(0xE, 4);
1565 Stream.Emit(0xD, 4);
1566
Chris Lattnerc1d10d62007-04-22 06:24:45 +00001567 // Emit the module.
1568 WriteModule(M, Stream);
Chris Lattnera660f4b2008-07-09 05:14:23 +00001569
1570 if (isDarwin)
Chris Lattneraf4c0bf2008-12-19 18:37:59 +00001571 EmitDarwinBCTrailer(Stream, Stream.getBuffer().size());
Chris Lattnerc1d10d62007-04-22 06:24:45 +00001572}