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Chris Lattner1a9df8e2007-04-29 05:31:57 +00001//===--- Bitcode/Writer/BitcodeWriter.cpp - Bitcode Writer ----------------===//
Chris Lattnerfd57cec2007-04-22 06:24:45 +00002//
3// The LLVM Compiler Infrastructure
4//
Chris Lattner4ee451d2007-12-29 20:36:04 +00005// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
Chris Lattnerfd57cec2007-04-22 06:24:45 +00007//
8//===----------------------------------------------------------------------===//
9//
10// Bitcode writer implementation.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/Bitcode/ReaderWriter.h"
Chandler Carruthd04a8d42012-12-03 16:50:05 +000015#include "ValueEnumerator.h"
16#include "llvm/ADT/Triple.h"
Chris Lattnerfd57cec2007-04-22 06:24:45 +000017#include "llvm/Bitcode/BitstreamWriter.h"
Chris Lattner47f96bf2007-04-23 01:01:37 +000018#include "llvm/Bitcode/LLVMBitCodes.h"
Chandler Carruth0b8c9a82013-01-02 11:36:10 +000019#include "llvm/IR/Constants.h"
20#include "llvm/IR/DerivedTypes.h"
21#include "llvm/IR/InlineAsm.h"
22#include "llvm/IR/Instructions.h"
23#include "llvm/IR/Module.h"
24#include "llvm/IR/Operator.h"
25#include "llvm/IR/ValueSymbolTable.h"
Chad Rosiercbbb0962011-12-07 21:44:12 +000026#include "llvm/Support/CommandLine.h"
Torok Edwinc25e7582009-07-11 20:10:48 +000027#include "llvm/Support/ErrorHandling.h"
Chris Lattnerfd57cec2007-04-22 06:24:45 +000028#include "llvm/Support/MathExtras.h"
Michael J. Spencer1f6efa32010-11-29 18:16:10 +000029#include "llvm/Support/Program.h"
Chandler Carruthd04a8d42012-12-03 16:50:05 +000030#include "llvm/Support/raw_ostream.h"
Nick Lewycky476b2422010-12-19 20:43:38 +000031#include <cctype>
Chris Lattner1afcace2011-07-09 17:41:24 +000032#include <map>
Chris Lattnerfd57cec2007-04-22 06:24:45 +000033using namespace llvm;
34
Chad Rosiercbbb0962011-12-07 21:44:12 +000035static cl::opt<bool>
36EnablePreserveUseListOrdering("enable-bc-uselist-preserve",
37 cl::desc("Turn on experimental support for "
38 "use-list order preservation."),
39 cl::init(false), cl::Hidden);
40
Chris Lattner59698302007-05-04 20:52:02 +000041/// These are manifest constants used by the bitcode writer. They do not need to
42/// be kept in sync with the reader, but need to be consistent within this file.
43enum {
Chris Lattner59698302007-05-04 20:52:02 +000044 // VALUE_SYMTAB_BLOCK abbrev id's.
45 VST_ENTRY_8_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
Chris Lattner2453f712007-05-04 20:58:35 +000046 VST_ENTRY_7_ABBREV,
Chris Lattnerff294a42007-05-05 01:26:50 +000047 VST_ENTRY_6_ABBREV,
Chris Lattnera0f1ecc2007-05-05 07:36:14 +000048 VST_BBENTRY_6_ABBREV,
Daniel Dunbara279bc32009-09-20 02:20:51 +000049
Chris Lattnera0f1ecc2007-05-05 07:36:14 +000050 // CONSTANTS_BLOCK abbrev id's.
51 CONSTANTS_SETTYPE_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
52 CONSTANTS_INTEGER_ABBREV,
53 CONSTANTS_CE_CAST_Abbrev,
Chris Lattner440168b2007-05-05 07:44:49 +000054 CONSTANTS_NULL_Abbrev,
Daniel Dunbara279bc32009-09-20 02:20:51 +000055
Chris Lattner440168b2007-05-05 07:44:49 +000056 // FUNCTION_BLOCK abbrev id's.
Chris Lattner94687ac2007-05-06 01:28:01 +000057 FUNCTION_INST_LOAD_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
Chris Lattnerf9f2e832007-05-06 02:38:57 +000058 FUNCTION_INST_BINOP_ABBREV,
Dan Gohman1224c382009-07-20 21:19:07 +000059 FUNCTION_INST_BINOP_FLAGS_ABBREV,
Chris Lattnerf9f2e832007-05-06 02:38:57 +000060 FUNCTION_INST_CAST_ABBREV,
Chris Lattner94687ac2007-05-06 01:28:01 +000061 FUNCTION_INST_RET_VOID_ABBREV,
62 FUNCTION_INST_RET_VAL_ABBREV,
Bob Wilsondb3a9e62013-09-09 19:14:35 +000063 FUNCTION_INST_UNREACHABLE_ABBREV
Chris Lattner59698302007-05-04 20:52:02 +000064};
65
Chris Lattnerf581c3b2007-04-24 07:07:11 +000066static unsigned GetEncodedCastOpcode(unsigned Opcode) {
67 switch (Opcode) {
Torok Edwinc23197a2009-07-14 16:55:14 +000068 default: llvm_unreachable("Unknown cast instruction!");
Chris Lattnerf581c3b2007-04-24 07:07:11 +000069 case Instruction::Trunc : return bitc::CAST_TRUNC;
70 case Instruction::ZExt : return bitc::CAST_ZEXT;
71 case Instruction::SExt : return bitc::CAST_SEXT;
72 case Instruction::FPToUI : return bitc::CAST_FPTOUI;
73 case Instruction::FPToSI : return bitc::CAST_FPTOSI;
74 case Instruction::UIToFP : return bitc::CAST_UITOFP;
75 case Instruction::SIToFP : return bitc::CAST_SITOFP;
76 case Instruction::FPTrunc : return bitc::CAST_FPTRUNC;
77 case Instruction::FPExt : return bitc::CAST_FPEXT;
78 case Instruction::PtrToInt: return bitc::CAST_PTRTOINT;
79 case Instruction::IntToPtr: return bitc::CAST_INTTOPTR;
80 case Instruction::BitCast : return bitc::CAST_BITCAST;
Matt Arsenault59d3ae62013-11-15 01:34:59 +000081 case Instruction::AddrSpaceCast : return bitc::CAST_ADDRSPACECAST;
Chris Lattnerf581c3b2007-04-24 07:07:11 +000082 }
83}
84
85static unsigned GetEncodedBinaryOpcode(unsigned Opcode) {
86 switch (Opcode) {
Torok Edwinc23197a2009-07-14 16:55:14 +000087 default: llvm_unreachable("Unknown binary instruction!");
Dan Gohmanae3a0be2009-06-04 22:49:04 +000088 case Instruction::Add:
89 case Instruction::FAdd: return bitc::BINOP_ADD;
90 case Instruction::Sub:
91 case Instruction::FSub: return bitc::BINOP_SUB;
92 case Instruction::Mul:
93 case Instruction::FMul: return bitc::BINOP_MUL;
Chris Lattnerf581c3b2007-04-24 07:07:11 +000094 case Instruction::UDiv: return bitc::BINOP_UDIV;
95 case Instruction::FDiv:
96 case Instruction::SDiv: return bitc::BINOP_SDIV;
97 case Instruction::URem: return bitc::BINOP_UREM;
98 case Instruction::FRem:
99 case Instruction::SRem: return bitc::BINOP_SREM;
100 case Instruction::Shl: return bitc::BINOP_SHL;
101 case Instruction::LShr: return bitc::BINOP_LSHR;
102 case Instruction::AShr: return bitc::BINOP_ASHR;
103 case Instruction::And: return bitc::BINOP_AND;
104 case Instruction::Or: return bitc::BINOP_OR;
105 case Instruction::Xor: return bitc::BINOP_XOR;
106 }
107}
108
Eli Friedmanff030482011-07-28 21:48:00 +0000109static unsigned GetEncodedRMWOperation(AtomicRMWInst::BinOp Op) {
110 switch (Op) {
111 default: llvm_unreachable("Unknown RMW operation!");
112 case AtomicRMWInst::Xchg: return bitc::RMW_XCHG;
113 case AtomicRMWInst::Add: return bitc::RMW_ADD;
114 case AtomicRMWInst::Sub: return bitc::RMW_SUB;
115 case AtomicRMWInst::And: return bitc::RMW_AND;
116 case AtomicRMWInst::Nand: return bitc::RMW_NAND;
117 case AtomicRMWInst::Or: return bitc::RMW_OR;
118 case AtomicRMWInst::Xor: return bitc::RMW_XOR;
119 case AtomicRMWInst::Max: return bitc::RMW_MAX;
120 case AtomicRMWInst::Min: return bitc::RMW_MIN;
121 case AtomicRMWInst::UMax: return bitc::RMW_UMAX;
122 case AtomicRMWInst::UMin: return bitc::RMW_UMIN;
123 }
124}
125
Eli Friedman47f35132011-07-25 23:16:38 +0000126static unsigned GetEncodedOrdering(AtomicOrdering Ordering) {
127 switch (Ordering) {
Eli Friedman47f35132011-07-25 23:16:38 +0000128 case NotAtomic: return bitc::ORDERING_NOTATOMIC;
129 case Unordered: return bitc::ORDERING_UNORDERED;
130 case Monotonic: return bitc::ORDERING_MONOTONIC;
131 case Acquire: return bitc::ORDERING_ACQUIRE;
132 case Release: return bitc::ORDERING_RELEASE;
133 case AcquireRelease: return bitc::ORDERING_ACQREL;
134 case SequentiallyConsistent: return bitc::ORDERING_SEQCST;
135 }
Chandler Carruth732f05c2012-01-10 18:08:01 +0000136 llvm_unreachable("Invalid ordering");
Eli Friedman47f35132011-07-25 23:16:38 +0000137}
138
139static unsigned GetEncodedSynchScope(SynchronizationScope SynchScope) {
140 switch (SynchScope) {
Eli Friedman47f35132011-07-25 23:16:38 +0000141 case SingleThread: return bitc::SYNCHSCOPE_SINGLETHREAD;
142 case CrossThread: return bitc::SYNCHSCOPE_CROSSTHREAD;
143 }
Chandler Carruth732f05c2012-01-10 18:08:01 +0000144 llvm_unreachable("Invalid synch scope");
Eli Friedman47f35132011-07-25 23:16:38 +0000145}
146
Chris Lattner1afcace2011-07-09 17:41:24 +0000147static void WriteStringRecord(unsigned Code, StringRef Str,
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000148 unsigned AbbrevToUse, BitstreamWriter &Stream) {
149 SmallVector<unsigned, 64> Vals;
Daniel Dunbara279bc32009-09-20 02:20:51 +0000150
Chris Lattner15e6d172007-05-04 19:11:41 +0000151 // Code: [strchar x N]
Chris Lattner1afcace2011-07-09 17:41:24 +0000152 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
153 if (AbbrevToUse && !BitCodeAbbrevOp::isChar6(Str[i]))
154 AbbrevToUse = 0;
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000155 Vals.push_back(Str[i]);
Chris Lattner1afcace2011-07-09 17:41:24 +0000156 }
Daniel Dunbara279bc32009-09-20 02:20:51 +0000157
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000158 // Emit the finished record.
159 Stream.EmitRecord(Code, Vals, AbbrevToUse);
160}
161
Tobias Grossere7bc5bb2013-07-26 04:16:55 +0000162static uint64_t getAttrKindEncoding(Attribute::AttrKind Kind) {
163 switch (Kind) {
164 case Attribute::Alignment:
165 return bitc::ATTR_KIND_ALIGNMENT;
166 case Attribute::AlwaysInline:
167 return bitc::ATTR_KIND_ALWAYS_INLINE;
168 case Attribute::Builtin:
169 return bitc::ATTR_KIND_BUILTIN;
170 case Attribute::ByVal:
171 return bitc::ATTR_KIND_BY_VAL;
172 case Attribute::Cold:
173 return bitc::ATTR_KIND_COLD;
174 case Attribute::InlineHint:
175 return bitc::ATTR_KIND_INLINE_HINT;
176 case Attribute::InReg:
177 return bitc::ATTR_KIND_IN_REG;
178 case Attribute::MinSize:
179 return bitc::ATTR_KIND_MIN_SIZE;
180 case Attribute::Naked:
181 return bitc::ATTR_KIND_NAKED;
182 case Attribute::Nest:
183 return bitc::ATTR_KIND_NEST;
184 case Attribute::NoAlias:
185 return bitc::ATTR_KIND_NO_ALIAS;
186 case Attribute::NoBuiltin:
187 return bitc::ATTR_KIND_NO_BUILTIN;
188 case Attribute::NoCapture:
189 return bitc::ATTR_KIND_NO_CAPTURE;
190 case Attribute::NoDuplicate:
191 return bitc::ATTR_KIND_NO_DUPLICATE;
192 case Attribute::NoImplicitFloat:
193 return bitc::ATTR_KIND_NO_IMPLICIT_FLOAT;
194 case Attribute::NoInline:
195 return bitc::ATTR_KIND_NO_INLINE;
196 case Attribute::NonLazyBind:
197 return bitc::ATTR_KIND_NON_LAZY_BIND;
198 case Attribute::NoRedZone:
199 return bitc::ATTR_KIND_NO_RED_ZONE;
200 case Attribute::NoReturn:
201 return bitc::ATTR_KIND_NO_RETURN;
202 case Attribute::NoUnwind:
203 return bitc::ATTR_KIND_NO_UNWIND;
204 case Attribute::OptimizeForSize:
205 return bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE;
Andrea Di Biagio5768bb82013-08-23 11:53:55 +0000206 case Attribute::OptimizeNone:
207 return bitc::ATTR_KIND_OPTIMIZE_NONE;
Tobias Grossere7bc5bb2013-07-26 04:16:55 +0000208 case Attribute::ReadNone:
209 return bitc::ATTR_KIND_READ_NONE;
210 case Attribute::ReadOnly:
211 return bitc::ATTR_KIND_READ_ONLY;
212 case Attribute::Returned:
213 return bitc::ATTR_KIND_RETURNED;
214 case Attribute::ReturnsTwice:
215 return bitc::ATTR_KIND_RETURNS_TWICE;
216 case Attribute::SExt:
217 return bitc::ATTR_KIND_S_EXT;
218 case Attribute::StackAlignment:
219 return bitc::ATTR_KIND_STACK_ALIGNMENT;
220 case Attribute::StackProtect:
221 return bitc::ATTR_KIND_STACK_PROTECT;
222 case Attribute::StackProtectReq:
223 return bitc::ATTR_KIND_STACK_PROTECT_REQ;
224 case Attribute::StackProtectStrong:
225 return bitc::ATTR_KIND_STACK_PROTECT_STRONG;
226 case Attribute::StructRet:
227 return bitc::ATTR_KIND_STRUCT_RET;
228 case Attribute::SanitizeAddress:
229 return bitc::ATTR_KIND_SANITIZE_ADDRESS;
230 case Attribute::SanitizeThread:
231 return bitc::ATTR_KIND_SANITIZE_THREAD;
232 case Attribute::SanitizeMemory:
233 return bitc::ATTR_KIND_SANITIZE_MEMORY;
234 case Attribute::UWTable:
235 return bitc::ATTR_KIND_UW_TABLE;
236 case Attribute::ZExt:
237 return bitc::ATTR_KIND_Z_EXT;
238 case Attribute::EndAttrKinds:
239 llvm_unreachable("Can not encode end-attribute kinds marker.");
240 case Attribute::None:
241 llvm_unreachable("Can not encode none-attribute.");
242 }
243
244 llvm_unreachable("Trying to encode unknown attribute");
245}
246
Bill Wendling0f715c22013-02-10 23:09:32 +0000247static void WriteAttributeGroupTable(const ValueEnumerator &VE,
248 BitstreamWriter &Stream) {
Bill Wendlinge9229a62013-02-11 22:33:26 +0000249 const std::vector<AttributeSet> &AttrGrps = VE.getAttributeGroups();
250 if (AttrGrps.empty()) return;
Bill Wendling0f715c22013-02-10 23:09:32 +0000251
252 Stream.EnterSubblock(bitc::PARAMATTR_GROUP_BLOCK_ID, 3);
253
254 SmallVector<uint64_t, 64> Record;
Bill Wendlinge9229a62013-02-11 22:33:26 +0000255 for (unsigned i = 0, e = AttrGrps.size(); i != e; ++i) {
256 AttributeSet AS = AttrGrps[i];
Bill Wendling0f715c22013-02-10 23:09:32 +0000257 for (unsigned i = 0, e = AS.getNumSlots(); i != e; ++i) {
258 AttributeSet A = AS.getSlotAttributes(i);
259
Bill Wendlinge9229a62013-02-11 22:33:26 +0000260 Record.push_back(VE.getAttributeGroupID(A));
Bill Wendling0f715c22013-02-10 23:09:32 +0000261 Record.push_back(AS.getSlotIndex(i));
262
263 for (AttributeSet::iterator I = AS.begin(0), E = AS.end(0);
264 I != E; ++I) {
265 Attribute Attr = *I;
266 if (Attr.isEnumAttribute()) {
267 Record.push_back(0);
Tobias Grossere7bc5bb2013-07-26 04:16:55 +0000268 Record.push_back(getAttrKindEncoding(Attr.getKindAsEnum()));
Bill Wendling0f715c22013-02-10 23:09:32 +0000269 } else if (Attr.isAlignAttribute()) {
270 Record.push_back(1);
Tobias Grossere7bc5bb2013-07-26 04:16:55 +0000271 Record.push_back(getAttrKindEncoding(Attr.getKindAsEnum()));
Bill Wendling0f715c22013-02-10 23:09:32 +0000272 Record.push_back(Attr.getValueAsInt());
273 } else {
274 StringRef Kind = Attr.getKindAsString();
275 StringRef Val = Attr.getValueAsString();
276
277 Record.push_back(Val.empty() ? 3 : 4);
278 Record.append(Kind.begin(), Kind.end());
279 Record.push_back(0);
280 if (!Val.empty()) {
281 Record.append(Val.begin(), Val.end());
282 Record.push_back(0);
283 }
284 }
285 }
286
287 Stream.EmitRecord(bitc::PARAMATTR_GRP_CODE_ENTRY, Record);
288 Record.clear();
289 }
290 }
291
292 Stream.ExitBlock();
293}
294
Daniel Dunbara279bc32009-09-20 02:20:51 +0000295static void WriteAttributeTable(const ValueEnumerator &VE,
Chris Lattner62bbeea2007-05-04 00:44:52 +0000296 BitstreamWriter &Stream) {
Bill Wendling99faa3b2012-12-07 23:16:57 +0000297 const std::vector<AttributeSet> &Attrs = VE.getAttributes();
Chris Lattner62bbeea2007-05-04 00:44:52 +0000298 if (Attrs.empty()) return;
Daniel Dunbara279bc32009-09-20 02:20:51 +0000299
Chris Lattnerf0a65312007-05-04 02:59:04 +0000300 Stream.EnterSubblock(bitc::PARAMATTR_BLOCK_ID, 3);
301
302 SmallVector<uint64_t, 64> Record;
303 for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
Bill Wendling99faa3b2012-12-07 23:16:57 +0000304 const AttributeSet &A = Attrs[i];
Bill Wendling48fbcfe2013-02-12 08:13:50 +0000305 for (unsigned i = 0, e = A.getNumSlots(); i != e; ++i)
306 Record.push_back(VE.getAttributeGroupID(A.getSlotAttributes(i)));
Daniel Dunbara279bc32009-09-20 02:20:51 +0000307
Bill Wendling48fbcfe2013-02-12 08:13:50 +0000308 Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record);
Chris Lattnerf0a65312007-05-04 02:59:04 +0000309 Record.clear();
310 }
Daniel Dunbara279bc32009-09-20 02:20:51 +0000311
Chris Lattnerf0a65312007-05-04 02:59:04 +0000312 Stream.ExitBlock();
Chris Lattner62bbeea2007-05-04 00:44:52 +0000313}
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000314
315/// WriteTypeTable - Write out the type table for a module.
316static void WriteTypeTable(const ValueEnumerator &VE, BitstreamWriter &Stream) {
317 const ValueEnumerator::TypeList &TypeList = VE.getTypes();
Daniel Dunbara279bc32009-09-20 02:20:51 +0000318
Chris Lattner1afcace2011-07-09 17:41:24 +0000319 Stream.EnterSubblock(bitc::TYPE_BLOCK_ID_NEW, 4 /*count from # abbrevs */);
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000320 SmallVector<uint64_t, 64> TypeVals;
Daniel Dunbara279bc32009-09-20 02:20:51 +0000321
Chad Rosier667f8262011-12-08 00:38:45 +0000322 uint64_t NumBits = Log2_32_Ceil(VE.getTypes().size()+1);
323
Chris Lattnerd092e0e2007-05-05 06:30:12 +0000324 // Abbrev for TYPE_CODE_POINTER.
325 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
326 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_POINTER));
Chad Rosier667f8262011-12-08 00:38:45 +0000327 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
Christopher Lambd49e18d2007-12-12 08:44:39 +0000328 Abbv->Add(BitCodeAbbrevOp(0)); // Addrspace = 0
Chris Lattnerd092e0e2007-05-05 06:30:12 +0000329 unsigned PtrAbbrev = Stream.EmitAbbrev(Abbv);
Daniel Dunbara279bc32009-09-20 02:20:51 +0000330
Chris Lattnerd092e0e2007-05-05 06:30:12 +0000331 // Abbrev for TYPE_CODE_FUNCTION.
332 Abbv = new BitCodeAbbrev();
333 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_FUNCTION));
334 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isvararg
Chris Lattnerd092e0e2007-05-05 06:30:12 +0000335 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Chad Rosier667f8262011-12-08 00:38:45 +0000336 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
337
Chris Lattnerd092e0e2007-05-05 06:30:12 +0000338 unsigned FunctionAbbrev = Stream.EmitAbbrev(Abbv);
Daniel Dunbara279bc32009-09-20 02:20:51 +0000339
Chris Lattner1afcace2011-07-09 17:41:24 +0000340 // Abbrev for TYPE_CODE_STRUCT_ANON.
Chris Lattnerd092e0e2007-05-05 06:30:12 +0000341 Abbv = new BitCodeAbbrev();
Chris Lattner1afcace2011-07-09 17:41:24 +0000342 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_ANON));
Chris Lattnerd092e0e2007-05-05 06:30:12 +0000343 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked
344 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Chad Rosier667f8262011-12-08 00:38:45 +0000345 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
346
Chris Lattner1afcace2011-07-09 17:41:24 +0000347 unsigned StructAnonAbbrev = Stream.EmitAbbrev(Abbv);
Daniel Dunbara279bc32009-09-20 02:20:51 +0000348
Chris Lattner1afcace2011-07-09 17:41:24 +0000349 // Abbrev for TYPE_CODE_STRUCT_NAME.
350 Abbv = new BitCodeAbbrev();
351 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAME));
352 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
353 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
354 unsigned StructNameAbbrev = Stream.EmitAbbrev(Abbv);
355
356 // Abbrev for TYPE_CODE_STRUCT_NAMED.
357 Abbv = new BitCodeAbbrev();
358 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAMED));
359 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ispacked
360 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Chad Rosier667f8262011-12-08 00:38:45 +0000361 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
362
Chris Lattner1afcace2011-07-09 17:41:24 +0000363 unsigned StructNamedAbbrev = Stream.EmitAbbrev(Abbv);
Michael Ilseman407a6162012-11-15 22:34:00 +0000364
Chris Lattnerd092e0e2007-05-05 06:30:12 +0000365 // Abbrev for TYPE_CODE_ARRAY.
366 Abbv = new BitCodeAbbrev();
367 Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_ARRAY));
368 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // size
Chad Rosier667f8262011-12-08 00:38:45 +0000369 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
370
Chris Lattnerd092e0e2007-05-05 06:30:12 +0000371 unsigned ArrayAbbrev = Stream.EmitAbbrev(Abbv);
Daniel Dunbara279bc32009-09-20 02:20:51 +0000372
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000373 // Emit an entry count so the reader can reserve space.
374 TypeVals.push_back(TypeList.size());
375 Stream.EmitRecord(bitc::TYPE_CODE_NUMENTRY, TypeVals);
376 TypeVals.clear();
Daniel Dunbara279bc32009-09-20 02:20:51 +0000377
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000378 // Loop over all of the types, emitting each in turn.
379 for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
Chris Lattnerdb125cf2011-07-18 04:54:35 +0000380 Type *T = TypeList[i];
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000381 int AbbrevToUse = 0;
382 unsigned Code = 0;
Daniel Dunbara279bc32009-09-20 02:20:51 +0000383
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000384 switch (T->getTypeID()) {
Torok Edwinc23197a2009-07-14 16:55:14 +0000385 default: llvm_unreachable("Unknown type!");
Joe Abbey170a15e2012-11-25 15:23:39 +0000386 case Type::VoidTyID: Code = bitc::TYPE_CODE_VOID; break;
387 case Type::HalfTyID: Code = bitc::TYPE_CODE_HALF; break;
388 case Type::FloatTyID: Code = bitc::TYPE_CODE_FLOAT; break;
389 case Type::DoubleTyID: Code = bitc::TYPE_CODE_DOUBLE; break;
390 case Type::X86_FP80TyID: Code = bitc::TYPE_CODE_X86_FP80; break;
391 case Type::FP128TyID: Code = bitc::TYPE_CODE_FP128; break;
Dale Johannesen320fc8a2007-08-03 01:03:46 +0000392 case Type::PPC_FP128TyID: Code = bitc::TYPE_CODE_PPC_FP128; break;
Joe Abbey170a15e2012-11-25 15:23:39 +0000393 case Type::LabelTyID: Code = bitc::TYPE_CODE_LABEL; break;
394 case Type::MetadataTyID: Code = bitc::TYPE_CODE_METADATA; break;
395 case Type::X86_MMXTyID: Code = bitc::TYPE_CODE_X86_MMX; break;
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000396 case Type::IntegerTyID:
397 // INTEGER: [width]
398 Code = bitc::TYPE_CODE_INTEGER;
399 TypeVals.push_back(cast<IntegerType>(T)->getBitWidth());
400 break;
Duncan Sands216b74c2007-12-11 12:20:47 +0000401 case Type::PointerTyID: {
Chris Lattnerdb125cf2011-07-18 04:54:35 +0000402 PointerType *PTy = cast<PointerType>(T);
Christopher Lambd49e18d2007-12-12 08:44:39 +0000403 // POINTER: [pointee type, address space]
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000404 Code = bitc::TYPE_CODE_POINTER;
Christopher Lambfe63fb92007-12-11 08:59:05 +0000405 TypeVals.push_back(VE.getTypeID(PTy->getElementType()));
Christopher Lambd49e18d2007-12-12 08:44:39 +0000406 unsigned AddressSpace = PTy->getAddressSpace();
407 TypeVals.push_back(AddressSpace);
408 if (AddressSpace == 0) AbbrevToUse = PtrAbbrev;
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000409 break;
Duncan Sands216b74c2007-12-11 12:20:47 +0000410 }
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000411 case Type::FunctionTyID: {
Chris Lattnerdb125cf2011-07-18 04:54:35 +0000412 FunctionType *FT = cast<FunctionType>(T);
Chad Rosiercde54642011-11-03 00:14:01 +0000413 // FUNCTION: [isvararg, retty, paramty x N]
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000414 Code = bitc::TYPE_CODE_FUNCTION;
415 TypeVals.push_back(FT->isVarArg());
416 TypeVals.push_back(VE.getTypeID(FT->getReturnType()));
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000417 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i)
418 TypeVals.push_back(VE.getTypeID(FT->getParamType(i)));
Chris Lattnerd092e0e2007-05-05 06:30:12 +0000419 AbbrevToUse = FunctionAbbrev;
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000420 break;
421 }
422 case Type::StructTyID: {
Chris Lattnerdb125cf2011-07-18 04:54:35 +0000423 StructType *ST = cast<StructType>(T);
Chris Lattnerd092e0e2007-05-05 06:30:12 +0000424 // STRUCT: [ispacked, eltty x N]
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000425 TypeVals.push_back(ST->isPacked());
Chris Lattner15e6d172007-05-04 19:11:41 +0000426 // Output all of the element types.
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000427 for (StructType::element_iterator I = ST->element_begin(),
428 E = ST->element_end(); I != E; ++I)
429 TypeVals.push_back(VE.getTypeID(*I));
Michael Ilseman407a6162012-11-15 22:34:00 +0000430
Chris Lattner3ebb6492011-08-12 18:06:37 +0000431 if (ST->isLiteral()) {
Chris Lattner1afcace2011-07-09 17:41:24 +0000432 Code = bitc::TYPE_CODE_STRUCT_ANON;
433 AbbrevToUse = StructAnonAbbrev;
434 } else {
435 if (ST->isOpaque()) {
436 Code = bitc::TYPE_CODE_OPAQUE;
437 } else {
438 Code = bitc::TYPE_CODE_STRUCT_NAMED;
439 AbbrevToUse = StructNamedAbbrev;
440 }
441
442 // Emit the name if it is present.
443 if (!ST->getName().empty())
444 WriteStringRecord(bitc::TYPE_CODE_STRUCT_NAME, ST->getName(),
445 StructNameAbbrev, Stream);
446 }
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000447 break;
448 }
449 case Type::ArrayTyID: {
Chris Lattnerdb125cf2011-07-18 04:54:35 +0000450 ArrayType *AT = cast<ArrayType>(T);
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000451 // ARRAY: [numelts, eltty]
452 Code = bitc::TYPE_CODE_ARRAY;
453 TypeVals.push_back(AT->getNumElements());
454 TypeVals.push_back(VE.getTypeID(AT->getElementType()));
Chris Lattnerd092e0e2007-05-05 06:30:12 +0000455 AbbrevToUse = ArrayAbbrev;
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000456 break;
457 }
458 case Type::VectorTyID: {
Chris Lattnerdb125cf2011-07-18 04:54:35 +0000459 VectorType *VT = cast<VectorType>(T);
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000460 // VECTOR [numelts, eltty]
461 Code = bitc::TYPE_CODE_VECTOR;
462 TypeVals.push_back(VT->getNumElements());
463 TypeVals.push_back(VE.getTypeID(VT->getElementType()));
464 break;
465 }
466 }
467
468 // Emit the finished record.
469 Stream.EmitRecord(Code, TypeVals, AbbrevToUse);
470 TypeVals.clear();
471 }
Daniel Dunbara279bc32009-09-20 02:20:51 +0000472
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000473 Stream.ExitBlock();
474}
475
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000476static unsigned getEncodedLinkage(const GlobalValue *GV) {
477 switch (GV->getLinkage()) {
Bill Wendling55ae5152010-08-20 22:05:50 +0000478 case GlobalValue::ExternalLinkage: return 0;
479 case GlobalValue::WeakAnyLinkage: return 1;
480 case GlobalValue::AppendingLinkage: return 2;
481 case GlobalValue::InternalLinkage: return 3;
482 case GlobalValue::LinkOnceAnyLinkage: return 4;
483 case GlobalValue::DLLImportLinkage: return 5;
484 case GlobalValue::DLLExportLinkage: return 6;
485 case GlobalValue::ExternalWeakLinkage: return 7;
486 case GlobalValue::CommonLinkage: return 8;
487 case GlobalValue::PrivateLinkage: return 9;
488 case GlobalValue::WeakODRLinkage: return 10;
489 case GlobalValue::LinkOnceODRLinkage: return 11;
490 case GlobalValue::AvailableExternallyLinkage: return 12;
491 case GlobalValue::LinkerPrivateLinkage: return 13;
492 case GlobalValue::LinkerPrivateWeakLinkage: return 14;
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000493 }
Chandler Carruth732f05c2012-01-10 18:08:01 +0000494 llvm_unreachable("Invalid linkage");
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000495}
496
497static unsigned getEncodedVisibility(const GlobalValue *GV) {
498 switch (GV->getVisibility()) {
Anton Korobeynikov9cd3ccf2007-04-29 20:56:48 +0000499 case GlobalValue::DefaultVisibility: return 0;
500 case GlobalValue::HiddenVisibility: return 1;
501 case GlobalValue::ProtectedVisibility: return 2;
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000502 }
Chandler Carruth732f05c2012-01-10 18:08:01 +0000503 llvm_unreachable("Invalid visibility");
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000504}
505
Hans Wennborgce718ff2012-06-23 11:37:03 +0000506static unsigned getEncodedThreadLocalMode(const GlobalVariable *GV) {
507 switch (GV->getThreadLocalMode()) {
508 case GlobalVariable::NotThreadLocal: return 0;
509 case GlobalVariable::GeneralDynamicTLSModel: return 1;
510 case GlobalVariable::LocalDynamicTLSModel: return 2;
511 case GlobalVariable::InitialExecTLSModel: return 3;
512 case GlobalVariable::LocalExecTLSModel: return 4;
513 }
514 llvm_unreachable("Invalid TLS model");
515}
516
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000517// Emit top-level description of module, including target triple, inline asm,
518// descriptors for global variables, and function prototype info.
519static void WriteModuleInfo(const Module *M, const ValueEnumerator &VE,
520 BitstreamWriter &Stream) {
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000521 // Emit various pieces of data attached to a module.
522 if (!M->getTargetTriple().empty())
523 WriteStringRecord(bitc::MODULE_CODE_TRIPLE, M->getTargetTriple(),
524 0/*TODO*/, Stream);
525 if (!M->getDataLayout().empty())
526 WriteStringRecord(bitc::MODULE_CODE_DATALAYOUT, M->getDataLayout(),
527 0/*TODO*/, Stream);
528 if (!M->getModuleInlineAsm().empty())
529 WriteStringRecord(bitc::MODULE_CODE_ASM, M->getModuleInlineAsm(),
530 0/*TODO*/, Stream);
531
Gordon Henriksen5eca0752008-08-17 18:44:35 +0000532 // Emit information about sections and GC, computing how many there are. Also
533 // compute the maximum alignment value.
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000534 std::map<std::string, unsigned> SectionMap;
Gordon Henriksen5eca0752008-08-17 18:44:35 +0000535 std::map<std::string, unsigned> GCMap;
Chris Lattner36d5e7d2007-04-23 16:04:05 +0000536 unsigned MaxAlignment = 0;
Chris Lattnerd127c1b2007-04-23 18:58:34 +0000537 unsigned MaxGlobalType = 0;
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000538 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end();
539 GV != E; ++GV) {
Chris Lattner36d5e7d2007-04-23 16:04:05 +0000540 MaxAlignment = std::max(MaxAlignment, GV->getAlignment());
Chris Lattnerd127c1b2007-04-23 18:58:34 +0000541 MaxGlobalType = std::max(MaxGlobalType, VE.getTypeID(GV->getType()));
Chad Rosier08712212011-08-12 16:45:18 +0000542 if (GV->hasSection()) {
543 // Give section names unique ID's.
544 unsigned &Entry = SectionMap[GV->getSection()];
545 if (!Entry) {
546 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, GV->getSection(),
547 0/*TODO*/, Stream);
548 Entry = SectionMap.size();
549 }
550 }
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000551 }
552 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) {
Chris Lattner36d5e7d2007-04-23 16:04:05 +0000553 MaxAlignment = std::max(MaxAlignment, F->getAlignment());
Gordon Henriksen80a75bf2007-12-10 03:18:06 +0000554 if (F->hasSection()) {
555 // Give section names unique ID's.
556 unsigned &Entry = SectionMap[F->getSection()];
557 if (!Entry) {
558 WriteStringRecord(bitc::MODULE_CODE_SECTIONNAME, F->getSection(),
559 0/*TODO*/, Stream);
560 Entry = SectionMap.size();
561 }
562 }
Gordon Henriksen5eca0752008-08-17 18:44:35 +0000563 if (F->hasGC()) {
564 // Same for GC names.
565 unsigned &Entry = GCMap[F->getGC()];
Gordon Henriksen80a75bf2007-12-10 03:18:06 +0000566 if (!Entry) {
Gordon Henriksen5eca0752008-08-17 18:44:35 +0000567 WriteStringRecord(bitc::MODULE_CODE_GCNAME, F->getGC(),
Gordon Henriksen80a75bf2007-12-10 03:18:06 +0000568 0/*TODO*/, Stream);
Gordon Henriksen5eca0752008-08-17 18:44:35 +0000569 Entry = GCMap.size();
Gordon Henriksen80a75bf2007-12-10 03:18:06 +0000570 }
571 }
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000572 }
Daniel Dunbara279bc32009-09-20 02:20:51 +0000573
Chris Lattner36d5e7d2007-04-23 16:04:05 +0000574 // Emit abbrev for globals, now that we know # sections and max alignment.
575 unsigned SimpleGVarAbbrev = 0;
Daniel Dunbara279bc32009-09-20 02:20:51 +0000576 if (!M->global_empty()) {
Chris Lattner36d5e7d2007-04-23 16:04:05 +0000577 // Add an abbrev for common globals with no visibility or thread localness.
578 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
579 Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_GLOBALVAR));
Chris Lattner2e7899d2007-05-04 20:34:50 +0000580 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
Chris Lattnerd127c1b2007-04-23 18:58:34 +0000581 Log2_32_Ceil(MaxGlobalType+1)));
Chris Lattner2e7899d2007-05-04 20:34:50 +0000582 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Constant.
Chris Lattner36d5e7d2007-04-23 16:04:05 +0000583 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Initializer.
Dale Johannesen66676462008-05-15 20:49:28 +0000584 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // Linkage.
Chris Lattner2e7899d2007-05-04 20:34:50 +0000585 if (MaxAlignment == 0) // Alignment.
Chris Lattner36d5e7d2007-04-23 16:04:05 +0000586 Abbv->Add(BitCodeAbbrevOp(0));
587 else {
588 unsigned MaxEncAlignment = Log2_32(MaxAlignment)+1;
Chris Lattner2e7899d2007-05-04 20:34:50 +0000589 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
Chris Lattnerd127c1b2007-04-23 18:58:34 +0000590 Log2_32_Ceil(MaxEncAlignment+1)));
Chris Lattner36d5e7d2007-04-23 16:04:05 +0000591 }
592 if (SectionMap.empty()) // Section.
593 Abbv->Add(BitCodeAbbrevOp(0));
594 else
Chris Lattner2e7899d2007-05-04 20:34:50 +0000595 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
Chris Lattner631a8ed2007-04-24 03:29:47 +0000596 Log2_32_Ceil(SectionMap.size()+1)));
Chris Lattner36d5e7d2007-04-23 16:04:05 +0000597 // Don't bother emitting vis + thread local.
598 SimpleGVarAbbrev = Stream.EmitAbbrev(Abbv);
599 }
Daniel Dunbara279bc32009-09-20 02:20:51 +0000600
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000601 // Emit the global variable information.
602 SmallVector<unsigned, 64> Vals;
603 for (Module::const_global_iterator GV = M->global_begin(),E = M->global_end();
604 GV != E; ++GV) {
Chris Lattner36d5e7d2007-04-23 16:04:05 +0000605 unsigned AbbrevToUse = 0;
606
Daniel Dunbara279bc32009-09-20 02:20:51 +0000607 // GLOBALVAR: [type, isconst, initid,
Rafael Espindolabea46262011-01-08 16:42:36 +0000608 // linkage, alignment, section, visibility, threadlocal,
Michael Gottesman611ee2a2013-10-14 22:36:51 +0000609 // unnamed_addr, externally_initialized]
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000610 Vals.push_back(VE.getTypeID(GV->getType()));
611 Vals.push_back(GV->isConstant());
612 Vals.push_back(GV->isDeclaration() ? 0 :
613 (VE.getValueID(GV->getInitializer()) + 1));
614 Vals.push_back(getEncodedLinkage(GV));
615 Vals.push_back(Log2_32(GV->getAlignment())+1);
616 Vals.push_back(GV->hasSection() ? SectionMap[GV->getSection()] : 0);
Daniel Dunbara279bc32009-09-20 02:20:51 +0000617 if (GV->isThreadLocal() ||
Rafael Espindolabea46262011-01-08 16:42:36 +0000618 GV->getVisibility() != GlobalValue::DefaultVisibility ||
Shuxin Yang69bd41d2013-10-27 03:08:44 +0000619 GV->hasUnnamedAddr() || GV->isExternallyInitialized()) {
Chris Lattner36d5e7d2007-04-23 16:04:05 +0000620 Vals.push_back(getEncodedVisibility(GV));
Hans Wennborgce718ff2012-06-23 11:37:03 +0000621 Vals.push_back(getEncodedThreadLocalMode(GV));
Rafael Espindolabea46262011-01-08 16:42:36 +0000622 Vals.push_back(GV->hasUnnamedAddr());
Michael Gottesmana2de37c2013-02-05 05:57:38 +0000623 Vals.push_back(GV->isExternallyInitialized());
Chris Lattner36d5e7d2007-04-23 16:04:05 +0000624 } else {
625 AbbrevToUse = SimpleGVarAbbrev;
626 }
Daniel Dunbara279bc32009-09-20 02:20:51 +0000627
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000628 Stream.EmitRecord(bitc::MODULE_CODE_GLOBALVAR, Vals, AbbrevToUse);
629 Vals.clear();
630 }
631
632 // Emit the function proto information.
633 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F) {
Chad Rosier0c89f7f2011-12-07 23:57:55 +0000634 // FUNCTION: [type, callingconv, isproto, linkage, paramattrs, alignment,
Peter Collingbourne1e3037f2013-09-16 01:08:15 +0000635 // section, visibility, gc, unnamed_addr, prefix]
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000636 Vals.push_back(VE.getTypeID(F->getType()));
637 Vals.push_back(F->getCallingConv());
638 Vals.push_back(F->isDeclaration());
639 Vals.push_back(getEncodedLinkage(F));
Devang Patel05988662008-09-25 21:00:45 +0000640 Vals.push_back(VE.getAttributeID(F->getAttributes()));
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000641 Vals.push_back(Log2_32(F->getAlignment())+1);
642 Vals.push_back(F->hasSection() ? SectionMap[F->getSection()] : 0);
643 Vals.push_back(getEncodedVisibility(F));
Gordon Henriksen5eca0752008-08-17 18:44:35 +0000644 Vals.push_back(F->hasGC() ? GCMap[F->getGC()] : 0);
Rafael Espindolabea46262011-01-08 16:42:36 +0000645 Vals.push_back(F->hasUnnamedAddr());
Peter Collingbourne1e3037f2013-09-16 01:08:15 +0000646 Vals.push_back(F->hasPrefixData() ? (VE.getValueID(F->getPrefixData()) + 1)
647 : 0);
Daniel Dunbara279bc32009-09-20 02:20:51 +0000648
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000649 unsigned AbbrevToUse = 0;
650 Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse);
651 Vals.clear();
652 }
Daniel Dunbara279bc32009-09-20 02:20:51 +0000653
Chris Lattner07d98b42007-04-26 02:46:40 +0000654 // Emit the alias information.
655 for (Module::const_alias_iterator AI = M->alias_begin(), E = M->alias_end();
656 AI != E; ++AI) {
Chad Rosier14d622d2011-12-08 00:11:31 +0000657 // ALIAS: [alias type, aliasee val#, linkage, visibility]
Chris Lattner07d98b42007-04-26 02:46:40 +0000658 Vals.push_back(VE.getTypeID(AI->getType()));
659 Vals.push_back(VE.getValueID(AI->getAliasee()));
660 Vals.push_back(getEncodedLinkage(AI));
Anton Korobeynikovf8342b92008-03-11 21:40:17 +0000661 Vals.push_back(getEncodedVisibility(AI));
Chris Lattner07d98b42007-04-26 02:46:40 +0000662 unsigned AbbrevToUse = 0;
663 Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals, AbbrevToUse);
664 Vals.clear();
665 }
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000666}
667
Dan Gohman1224c382009-07-20 21:19:07 +0000668static uint64_t GetOptimizationFlags(const Value *V) {
669 uint64_t Flags = 0;
670
671 if (const OverflowingBinaryOperator *OBO =
672 dyn_cast<OverflowingBinaryOperator>(V)) {
Dan Gohman5078f842009-08-20 17:11:38 +0000673 if (OBO->hasNoSignedWrap())
674 Flags |= 1 << bitc::OBO_NO_SIGNED_WRAP;
675 if (OBO->hasNoUnsignedWrap())
676 Flags |= 1 << bitc::OBO_NO_UNSIGNED_WRAP;
Chris Lattner35bda892011-02-06 21:44:57 +0000677 } else if (const PossiblyExactOperator *PEO =
678 dyn_cast<PossiblyExactOperator>(V)) {
679 if (PEO->isExact())
680 Flags |= 1 << bitc::PEO_EXACT;
Michael Ilseman495d10a2012-11-27 00:43:38 +0000681 } else if (const FPMathOperator *FPMO =
682 dyn_cast<const FPMathOperator>(V)) {
683 if (FPMO->hasUnsafeAlgebra())
Michael Ilseman1638b832012-12-09 21:12:04 +0000684 Flags |= FastMathFlags::UnsafeAlgebra;
Michael Ilseman495d10a2012-11-27 00:43:38 +0000685 if (FPMO->hasNoNaNs())
Michael Ilseman1638b832012-12-09 21:12:04 +0000686 Flags |= FastMathFlags::NoNaNs;
Michael Ilseman495d10a2012-11-27 00:43:38 +0000687 if (FPMO->hasNoInfs())
Michael Ilseman1638b832012-12-09 21:12:04 +0000688 Flags |= FastMathFlags::NoInfs;
Michael Ilseman495d10a2012-11-27 00:43:38 +0000689 if (FPMO->hasNoSignedZeros())
Michael Ilseman1638b832012-12-09 21:12:04 +0000690 Flags |= FastMathFlags::NoSignedZeros;
Michael Ilseman495d10a2012-11-27 00:43:38 +0000691 if (FPMO->hasAllowReciprocal())
Michael Ilseman1638b832012-12-09 21:12:04 +0000692 Flags |= FastMathFlags::AllowReciprocal;
Dan Gohman1224c382009-07-20 21:19:07 +0000693 }
694
695 return Flags;
696}
Chris Lattnerfd57cec2007-04-22 06:24:45 +0000697
Devang Patel912538b2009-08-04 05:01:35 +0000698static void WriteMDNode(const MDNode *N,
Devang Patel985fea22009-07-29 18:15:02 +0000699 const ValueEnumerator &VE,
Devang Patel912538b2009-08-04 05:01:35 +0000700 BitstreamWriter &Stream,
Craig Topper9e639e82013-07-11 16:22:38 +0000701 SmallVectorImpl<uint64_t> &Record) {
Chris Lattner5d0cacd2009-12-31 01:22:29 +0000702 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
703 if (N->getOperand(i)) {
704 Record.push_back(VE.getTypeID(N->getOperand(i)->getType()));
705 Record.push_back(VE.getValueID(N->getOperand(i)));
Devang Patel912538b2009-08-04 05:01:35 +0000706 } else {
Owen Anderson1d0be152009-08-13 21:58:54 +0000707 Record.push_back(VE.getTypeID(Type::getVoidTy(N->getContext())));
Devang Patel912538b2009-08-04 05:01:35 +0000708 Record.push_back(0);
709 }
710 }
Chris Lattner799a58a552011-06-17 17:56:00 +0000711 unsigned MDCode = N->isFunctionLocal() ? bitc::METADATA_FN_NODE :
712 bitc::METADATA_NODE;
Victor Hernandez24e64df2010-01-10 07:14:18 +0000713 Stream.EmitRecord(MDCode, Record, 0);
Devang Patel912538b2009-08-04 05:01:35 +0000714 Record.clear();
715}
Devang Patel104cf9e2009-07-23 01:07:34 +0000716
Dan Gohman17aa92c2010-07-21 23:38:33 +0000717static void WriteModuleMetadata(const Module *M,
718 const ValueEnumerator &VE,
Devang Patel912538b2009-08-04 05:01:35 +0000719 BitstreamWriter &Stream) {
Devang Pateld5ac4042009-08-04 06:00:18 +0000720 const ValueEnumerator::ValueList &Vals = VE.getMDValues();
Devang Patel912538b2009-08-04 05:01:35 +0000721 bool StartedMetadataBlock = false;
722 unsigned MDSAbbrev = 0;
723 SmallVector<uint64_t, 64> Record;
724 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
Daniel Dunbara279bc32009-09-20 02:20:51 +0000725
Devang Patel912538b2009-08-04 05:01:35 +0000726 if (const MDNode *N = dyn_cast<MDNode>(Vals[i].first)) {
Victor Hernandez2c482f42010-01-29 21:19:19 +0000727 if (!N->isFunctionLocal() || !N->getFunction()) {
Victor Hernandez0c316412010-01-13 19:37:33 +0000728 if (!StartedMetadataBlock) {
729 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
730 StartedMetadataBlock = true;
731 }
732 WriteMDNode(N, VE, Stream, Record);
Devang Patel912538b2009-08-04 05:01:35 +0000733 }
Devang Patel912538b2009-08-04 05:01:35 +0000734 } else if (const MDString *MDS = dyn_cast<MDString>(Vals[i].first)) {
735 if (!StartedMetadataBlock) {
736 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
Daniel Dunbara279bc32009-09-20 02:20:51 +0000737
Devang Patel70c9d172009-07-22 21:10:50 +0000738 // Abbrev for METADATA_STRING.
739 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
740 Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRING));
Devang Patele54abc92009-07-22 17:43:22 +0000741 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Devang Patel70c9d172009-07-22 21:10:50 +0000742 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
743 MDSAbbrev = Stream.EmitAbbrev(Abbv);
Devang Patel912538b2009-08-04 05:01:35 +0000744 StartedMetadataBlock = true;
Devang Patel985fea22009-07-29 18:15:02 +0000745 }
Daniel Dunbara279bc32009-09-20 02:20:51 +0000746
Devang Patel985fea22009-07-29 18:15:02 +0000747 // Code: [strchar x N]
Chris Lattner12f031d2009-10-19 05:51:03 +0000748 Record.append(MDS->begin(), MDS->end());
Daniel Dunbara279bc32009-09-20 02:20:51 +0000749
Devang Patel985fea22009-07-29 18:15:02 +0000750 // Emit the finished record.
Devang Patel104cf9e2009-07-23 01:07:34 +0000751 Stream.EmitRecord(bitc::METADATA_STRING, Record, MDSAbbrev);
752 Record.clear();
Devang Patel912538b2009-08-04 05:01:35 +0000753 }
754 }
Daniel Dunbara279bc32009-09-20 02:20:51 +0000755
Dan Gohman17aa92c2010-07-21 23:38:33 +0000756 // Write named metadata.
757 for (Module::const_named_metadata_iterator I = M->named_metadata_begin(),
758 E = M->named_metadata_end(); I != E; ++I) {
759 const NamedMDNode *NMD = I;
760 if (!StartedMetadataBlock) {
761 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
762 StartedMetadataBlock = true;
763 }
764
765 // Write name.
766 StringRef Str = NMD->getName();
767 for (unsigned i = 0, e = Str.size(); i != e; ++i)
768 Record.push_back(Str[i]);
769 Stream.EmitRecord(bitc::METADATA_NAME, Record, 0/*TODO*/);
770 Record.clear();
771
772 // Write named metadata operands.
773 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i)
774 Record.push_back(VE.getValueID(NMD->getOperand(i)));
Chris Lattner799a58a552011-06-17 17:56:00 +0000775 Stream.EmitRecord(bitc::METADATA_NAMED_NODE, Record, 0);
Dan Gohman17aa92c2010-07-21 23:38:33 +0000776 Record.clear();
777 }
778
Devang Patel912538b2009-08-04 05:01:35 +0000779 if (StartedMetadataBlock)
Devang Patele8e02132009-09-18 19:26:43 +0000780 Stream.ExitBlock();
781}
782
Victor Hernandez3cd7c3d2010-01-14 19:38:44 +0000783static void WriteFunctionLocalMetadata(const Function &F,
784 const ValueEnumerator &VE,
Victor Hernandez0c316412010-01-13 19:37:33 +0000785 BitstreamWriter &Stream) {
786 bool StartedMetadataBlock = false;
787 SmallVector<uint64_t, 64> Record;
Craig Topper9e639e82013-07-11 16:22:38 +0000788 const SmallVectorImpl<const MDNode *> &Vals = VE.getFunctionLocalMDValues();
Victor Hernandez3cd7c3d2010-01-14 19:38:44 +0000789 for (unsigned i = 0, e = Vals.size(); i != e; ++i)
Devang Patel62098692010-06-02 23:05:04 +0000790 if (const MDNode *N = Vals[i])
Victor Hernandez2c482f42010-01-29 21:19:19 +0000791 if (N->isFunctionLocal() && N->getFunction() == &F) {
Victor Hernandez0c316412010-01-13 19:37:33 +0000792 if (!StartedMetadataBlock) {
793 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
794 StartedMetadataBlock = true;
795 }
796 WriteMDNode(N, VE, Stream, Record);
Victor Hernandez0c316412010-01-13 19:37:33 +0000797 }
Michael Ilseman407a6162012-11-15 22:34:00 +0000798
Victor Hernandez0c316412010-01-13 19:37:33 +0000799 if (StartedMetadataBlock)
800 Stream.ExitBlock();
801}
802
Devang Patele8e02132009-09-18 19:26:43 +0000803static void WriteMetadataAttachment(const Function &F,
Daniel Dunbara279bc32009-09-20 02:20:51 +0000804 const ValueEnumerator &VE,
805 BitstreamWriter &Stream) {
Chris Lattnera6245242010-04-03 02:17:50 +0000806 Stream.EnterSubblock(bitc::METADATA_ATTACHMENT_ID, 3);
807
Devang Patele8e02132009-09-18 19:26:43 +0000808 SmallVector<uint64_t, 64> Record;
Daniel Dunbara279bc32009-09-20 02:20:51 +0000809
Devang Patele8e02132009-09-18 19:26:43 +0000810 // Write metadata attachments
Chris Lattner799a58a552011-06-17 17:56:00 +0000811 // METADATA_ATTACHMENT - [m x [value, [n x [id, mdnode]]]
Chris Lattner3990b122009-12-28 23:41:32 +0000812 SmallVector<std::pair<unsigned, MDNode*>, 4> MDs;
Michael Ilseman407a6162012-11-15 22:34:00 +0000813
Devang Patele8e02132009-09-18 19:26:43 +0000814 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
815 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
816 I != E; ++I) {
Devang Patelf61b2372009-10-22 18:55:16 +0000817 MDs.clear();
Chris Lattnera6245242010-04-03 02:17:50 +0000818 I->getAllMetadataOtherThanDebugLoc(MDs);
Michael Ilseman407a6162012-11-15 22:34:00 +0000819
Chris Lattner3990b122009-12-28 23:41:32 +0000820 // If no metadata, ignore instruction.
821 if (MDs.empty()) continue;
822
823 Record.push_back(VE.getInstructionID(I));
Michael Ilseman407a6162012-11-15 22:34:00 +0000824
Chris Lattner3990b122009-12-28 23:41:32 +0000825 for (unsigned i = 0, e = MDs.size(); i != e; ++i) {
826 Record.push_back(MDs[i].first);
827 Record.push_back(VE.getValueID(MDs[i].second));
Devang Patele8e02132009-09-18 19:26:43 +0000828 }
Chris Lattner799a58a552011-06-17 17:56:00 +0000829 Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0);
Chris Lattner3990b122009-12-28 23:41:32 +0000830 Record.clear();
Devang Patele8e02132009-09-18 19:26:43 +0000831 }
832
Chris Lattnera6245242010-04-03 02:17:50 +0000833 Stream.ExitBlock();
Devang Patele8e02132009-09-18 19:26:43 +0000834}
835
Chris Lattner7d05c462009-12-28 20:10:43 +0000836static void WriteModuleMetadataStore(const Module *M, BitstreamWriter &Stream) {
Devang Patele8e02132009-09-18 19:26:43 +0000837 SmallVector<uint64_t, 64> Record;
Daniel Dunbara279bc32009-09-20 02:20:51 +0000838
Devang Patele8e02132009-09-18 19:26:43 +0000839 // Write metadata kinds
840 // METADATA_KIND - [n x [id, name]]
Michael Ilsemancb66b5d2012-12-03 22:57:47 +0000841 SmallVector<StringRef, 8> Names;
Chris Lattner08113472009-12-29 09:01:33 +0000842 M->getMDKindNames(Names);
Michael Ilseman407a6162012-11-15 22:34:00 +0000843
Dan Gohman19538d12010-07-20 21:42:28 +0000844 if (Names.empty()) return;
Chris Lattner7d05c462009-12-28 20:10:43 +0000845
846 Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
Michael Ilseman407a6162012-11-15 22:34:00 +0000847
Dan Gohman19538d12010-07-20 21:42:28 +0000848 for (unsigned MDKindID = 0, e = Names.size(); MDKindID != e; ++MDKindID) {
Chris Lattner7d05c462009-12-28 20:10:43 +0000849 Record.push_back(MDKindID);
850 StringRef KName = Names[MDKindID];
851 Record.append(KName.begin(), KName.end());
Michael Ilseman407a6162012-11-15 22:34:00 +0000852
Devang Patele8e02132009-09-18 19:26:43 +0000853 Stream.EmitRecord(bitc::METADATA_KIND, Record, 0);
854 Record.clear();
855 }
856
Chris Lattner7d05c462009-12-28 20:10:43 +0000857 Stream.ExitBlock();
Devang Patel912538b2009-08-04 05:01:35 +0000858}
859
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +0000860static void emitSignedInt64(SmallVectorImpl<uint64_t> &Vals, uint64_t V) {
861 if ((int64_t)V >= 0)
862 Vals.push_back(V << 1);
863 else
864 Vals.push_back((-V << 1) | 1);
865}
866
Devang Patel912538b2009-08-04 05:01:35 +0000867static void WriteConstants(unsigned FirstVal, unsigned LastVal,
868 const ValueEnumerator &VE,
869 BitstreamWriter &Stream, bool isGlobal) {
870 if (FirstVal == LastVal) return;
Daniel Dunbara279bc32009-09-20 02:20:51 +0000871
Devang Patel912538b2009-08-04 05:01:35 +0000872 Stream.EnterSubblock(bitc::CONSTANTS_BLOCK_ID, 4);
873
874 unsigned AggregateAbbrev = 0;
875 unsigned String8Abbrev = 0;
876 unsigned CString7Abbrev = 0;
877 unsigned CString6Abbrev = 0;
878 // If this is a constant pool for the module, emit module-specific abbrevs.
879 if (isGlobal) {
880 // Abbrev for CST_CODE_AGGREGATE.
881 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
882 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_AGGREGATE));
883 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
884 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, Log2_32_Ceil(LastVal+1)));
885 AggregateAbbrev = Stream.EmitAbbrev(Abbv);
886
887 // Abbrev for CST_CODE_STRING.
888 Abbv = new BitCodeAbbrev();
889 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_STRING));
890 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
891 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
892 String8Abbrev = Stream.EmitAbbrev(Abbv);
893 // Abbrev for CST_CODE_CSTRING.
894 Abbv = new BitCodeAbbrev();
895 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
896 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
897 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
898 CString7Abbrev = Stream.EmitAbbrev(Abbv);
899 // Abbrev for CST_CODE_CSTRING.
900 Abbv = new BitCodeAbbrev();
901 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
902 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
903 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
904 CString6Abbrev = Stream.EmitAbbrev(Abbv);
Daniel Dunbara279bc32009-09-20 02:20:51 +0000905 }
906
Devang Patel912538b2009-08-04 05:01:35 +0000907 SmallVector<uint64_t, 64> Record;
908
909 const ValueEnumerator::ValueList &Vals = VE.getValues();
Chris Lattnerdb125cf2011-07-18 04:54:35 +0000910 Type *LastTy = 0;
Devang Patel912538b2009-08-04 05:01:35 +0000911 for (unsigned i = FirstVal; i != LastVal; ++i) {
912 const Value *V = Vals[i].first;
Chris Lattner2edd22b2007-04-24 00:16:04 +0000913 // If we need to switch types, do so now.
914 if (V->getType() != LastTy) {
915 LastTy = V->getType();
916 Record.push_back(VE.getTypeID(LastTy));
Chris Lattnera0f1ecc2007-05-05 07:36:14 +0000917 Stream.EmitRecord(bitc::CST_CODE_SETTYPE, Record,
918 CONSTANTS_SETTYPE_ABBREV);
Chris Lattner2edd22b2007-04-24 00:16:04 +0000919 Record.clear();
920 }
Daniel Dunbara279bc32009-09-20 02:20:51 +0000921
Chris Lattner2edd22b2007-04-24 00:16:04 +0000922 if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
Dale Johannesen43602982009-10-13 20:46:56 +0000923 Record.push_back(unsigned(IA->hasSideEffects()) |
Chad Rosierf16ae582012-09-05 00:56:20 +0000924 unsigned(IA->isAlignStack()) << 1 |
925 unsigned(IA->getDialect()&1) << 2);
Daniel Dunbara279bc32009-09-20 02:20:51 +0000926
Chris Lattner2bce93a2007-05-06 01:58:20 +0000927 // Add the asm string.
928 const std::string &AsmStr = IA->getAsmString();
929 Record.push_back(AsmStr.size());
930 for (unsigned i = 0, e = AsmStr.size(); i != e; ++i)
931 Record.push_back(AsmStr[i]);
Daniel Dunbara279bc32009-09-20 02:20:51 +0000932
Chris Lattner2bce93a2007-05-06 01:58:20 +0000933 // Add the constraint string.
934 const std::string &ConstraintStr = IA->getConstraintString();
935 Record.push_back(ConstraintStr.size());
936 for (unsigned i = 0, e = ConstraintStr.size(); i != e; ++i)
937 Record.push_back(ConstraintStr[i]);
938 Stream.EmitRecord(bitc::CST_CODE_INLINEASM, Record);
939 Record.clear();
Chris Lattner2edd22b2007-04-24 00:16:04 +0000940 continue;
941 }
942 const Constant *C = cast<Constant>(V);
943 unsigned Code = -1U;
944 unsigned AbbrevToUse = 0;
945 if (C->isNullValue()) {
946 Code = bitc::CST_CODE_NULL;
947 } else if (isa<UndefValue>(C)) {
948 Code = bitc::CST_CODE_UNDEF;
949 } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) {
Bob Wilsondb3a9e62013-09-09 19:14:35 +0000950 if (IV->getBitWidth() <= 64) {
951 uint64_t V = IV->getSExtValue();
952 emitSignedInt64(Record, V);
953 Code = bitc::CST_CODE_INTEGER;
954 AbbrevToUse = CONSTANTS_INTEGER_ABBREV;
955 } else { // Wide integers, > 64 bits in size.
956 // We have an arbitrary precision integer value to write whose
957 // bit width is > 64. However, in canonical unsigned integer
958 // format it is likely that the high bits are going to be zero.
959 // So, we only write the number of active words.
960 unsigned NWords = IV->getValue().getActiveWords();
961 const uint64_t *RawWords = IV->getValue().getRawData();
962 for (unsigned i = 0; i != NWords; ++i) {
963 emitSignedInt64(Record, RawWords[i]);
964 }
965 Code = bitc::CST_CODE_WIDE_INTEGER;
966 }
Chris Lattner2edd22b2007-04-24 00:16:04 +0000967 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
968 Code = bitc::CST_CODE_FLOAT;
Chris Lattnerdb125cf2011-07-18 04:54:35 +0000969 Type *Ty = CFP->getType();
Dan Gohmance163392011-12-17 00:04:22 +0000970 if (Ty->isHalfTy() || Ty->isFloatTy() || Ty->isDoubleTy()) {
Dale Johannesen7111b022008-10-09 18:53:47 +0000971 Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
Chris Lattnercf0fe8d2009-10-05 05:54:46 +0000972 } else if (Ty->isX86_FP80Ty()) {
Dale Johannesen693717f2007-09-26 23:20:33 +0000973 // api needed to prevent premature destruction
Dale Johannesen1b25cb22009-03-23 21:16:53 +0000974 // bits are not in the same order as a normal i80 APInt, compensate.
Dale Johannesen7111b022008-10-09 18:53:47 +0000975 APInt api = CFP->getValueAPF().bitcastToAPInt();
Dale Johannesen693717f2007-09-26 23:20:33 +0000976 const uint64_t *p = api.getRawData();
Dale Johannesen1b25cb22009-03-23 21:16:53 +0000977 Record.push_back((p[1] << 48) | (p[0] >> 16));
978 Record.push_back(p[0] & 0xffffLL);
Chris Lattnercf0fe8d2009-10-05 05:54:46 +0000979 } else if (Ty->isFP128Ty() || Ty->isPPC_FP128Ty()) {
Dale Johannesen7111b022008-10-09 18:53:47 +0000980 APInt api = CFP->getValueAPF().bitcastToAPInt();
Dale Johannesen693717f2007-09-26 23:20:33 +0000981 const uint64_t *p = api.getRawData();
Dale Johannesen3f6eb742007-09-11 18:32:33 +0000982 Record.push_back(p[0]);
983 Record.push_back(p[1]);
Dale Johannesenebbc95d2007-08-09 22:51:36 +0000984 } else {
985 assert (0 && "Unknown FP type!");
Chris Lattner2edd22b2007-04-24 00:16:04 +0000986 }
Chris Lattnerd408f062012-01-30 00:51:16 +0000987 } else if (isa<ConstantDataSequential>(C) &&
988 cast<ConstantDataSequential>(C)->isString()) {
989 const ConstantDataSequential *Str = cast<ConstantDataSequential>(C);
990 // Emit constant strings specially.
991 unsigned NumElts = Str->getNumElements();
992 // If this is a null-terminated string, use the denser CSTRING encoding.
993 if (Str->isCString()) {
994 Code = bitc::CST_CODE_CSTRING;
995 --NumElts; // Don't encode the null, which isn't allowed by char6.
996 } else {
997 Code = bitc::CST_CODE_STRING;
998 AbbrevToUse = String8Abbrev;
999 }
1000 bool isCStr7 = Code == bitc::CST_CODE_CSTRING;
1001 bool isCStrChar6 = Code == bitc::CST_CODE_CSTRING;
1002 for (unsigned i = 0; i != NumElts; ++i) {
1003 unsigned char V = Str->getElementAsInteger(i);
1004 Record.push_back(V);
1005 isCStr7 &= (V & 128) == 0;
1006 if (isCStrChar6)
1007 isCStrChar6 = BitCodeAbbrevOp::isChar6(V);
1008 }
Michael Ilseman407a6162012-11-15 22:34:00 +00001009
Chris Lattnerd408f062012-01-30 00:51:16 +00001010 if (isCStrChar6)
1011 AbbrevToUse = CString6Abbrev;
1012 else if (isCStr7)
1013 AbbrevToUse = CString7Abbrev;
Michael Ilseman407a6162012-11-15 22:34:00 +00001014 } else if (const ConstantDataSequential *CDS =
Chris Lattnerd408f062012-01-30 00:51:16 +00001015 dyn_cast<ConstantDataSequential>(C)) {
Chris Lattner41b99202012-01-30 07:36:01 +00001016 Code = bitc::CST_CODE_DATA;
Chris Lattnerd408f062012-01-30 00:51:16 +00001017 Type *EltTy = CDS->getType()->getElementType();
1018 if (isa<IntegerType>(EltTy)) {
1019 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i)
1020 Record.push_back(CDS->getElementAsInteger(i));
1021 } else if (EltTy->isFloatTy()) {
1022 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
1023 union { float F; uint32_t I; };
1024 F = CDS->getElementAsFloat(i);
1025 Record.push_back(I);
1026 }
1027 } else {
1028 assert(EltTy->isDoubleTy() && "Unknown ConstantData element type");
1029 for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
1030 union { double F; uint64_t I; };
1031 F = CDS->getElementAsDouble(i);
1032 Record.push_back(I);
1033 }
1034 }
1035 } else if (isa<ConstantArray>(C) || isa<ConstantStruct>(C) ||
1036 isa<ConstantVector>(C)) {
Chris Lattner2edd22b2007-04-24 00:16:04 +00001037 Code = bitc::CST_CODE_AGGREGATE;
Chris Lattner2edd22b2007-04-24 00:16:04 +00001038 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i)
1039 Record.push_back(VE.getValueID(C->getOperand(i)));
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001040 AbbrevToUse = AggregateAbbrev;
Chris Lattner2edd22b2007-04-24 00:16:04 +00001041 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
Chris Lattnerf581c3b2007-04-24 07:07:11 +00001042 switch (CE->getOpcode()) {
1043 default:
1044 if (Instruction::isCast(CE->getOpcode())) {
1045 Code = bitc::CST_CODE_CE_CAST;
1046 Record.push_back(GetEncodedCastOpcode(CE->getOpcode()));
1047 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1048 Record.push_back(VE.getValueID(C->getOperand(0)));
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001049 AbbrevToUse = CONSTANTS_CE_CAST_Abbrev;
Chris Lattnerf581c3b2007-04-24 07:07:11 +00001050 } else {
1051 assert(CE->getNumOperands() == 2 && "Unknown constant expr!");
1052 Code = bitc::CST_CODE_CE_BINOP;
1053 Record.push_back(GetEncodedBinaryOpcode(CE->getOpcode()));
1054 Record.push_back(VE.getValueID(C->getOperand(0)));
1055 Record.push_back(VE.getValueID(C->getOperand(1)));
Dan Gohman1224c382009-07-20 21:19:07 +00001056 uint64_t Flags = GetOptimizationFlags(CE);
1057 if (Flags != 0)
1058 Record.push_back(Flags);
Chris Lattnerf581c3b2007-04-24 07:07:11 +00001059 }
1060 break;
1061 case Instruction::GetElementPtr:
1062 Code = bitc::CST_CODE_CE_GEP;
Dan Gohmandd8004d2009-07-27 21:53:46 +00001063 if (cast<GEPOperator>(C)->isInBounds())
1064 Code = bitc::CST_CODE_CE_INBOUNDS_GEP;
Chris Lattnerf581c3b2007-04-24 07:07:11 +00001065 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) {
1066 Record.push_back(VE.getTypeID(C->getOperand(i)->getType()));
1067 Record.push_back(VE.getValueID(C->getOperand(i)));
1068 }
1069 break;
1070 case Instruction::Select:
1071 Code = bitc::CST_CODE_CE_SELECT;
1072 Record.push_back(VE.getValueID(C->getOperand(0)));
1073 Record.push_back(VE.getValueID(C->getOperand(1)));
1074 Record.push_back(VE.getValueID(C->getOperand(2)));
1075 break;
1076 case Instruction::ExtractElement:
1077 Code = bitc::CST_CODE_CE_EXTRACTELT;
1078 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1079 Record.push_back(VE.getValueID(C->getOperand(0)));
1080 Record.push_back(VE.getValueID(C->getOperand(1)));
1081 break;
1082 case Instruction::InsertElement:
1083 Code = bitc::CST_CODE_CE_INSERTELT;
1084 Record.push_back(VE.getValueID(C->getOperand(0)));
1085 Record.push_back(VE.getValueID(C->getOperand(1)));
1086 Record.push_back(VE.getValueID(C->getOperand(2)));
1087 break;
1088 case Instruction::ShuffleVector:
Nate Begeman0f123cf2009-02-12 21:28:33 +00001089 // If the return type and argument types are the same, this is a
1090 // standard shufflevector instruction. If the types are different,
1091 // then the shuffle is widening or truncating the input vectors, and
1092 // the argument type must also be encoded.
1093 if (C->getType() == C->getOperand(0)->getType()) {
1094 Code = bitc::CST_CODE_CE_SHUFFLEVEC;
1095 } else {
1096 Code = bitc::CST_CODE_CE_SHUFVEC_EX;
1097 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1098 }
Chris Lattnerf581c3b2007-04-24 07:07:11 +00001099 Record.push_back(VE.getValueID(C->getOperand(0)));
1100 Record.push_back(VE.getValueID(C->getOperand(1)));
1101 Record.push_back(VE.getValueID(C->getOperand(2)));
1102 break;
1103 case Instruction::ICmp:
1104 case Instruction::FCmp:
Nick Lewycky7f6aa2b2009-07-08 03:04:38 +00001105 Code = bitc::CST_CODE_CE_CMP;
Chris Lattnerf581c3b2007-04-24 07:07:11 +00001106 Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
1107 Record.push_back(VE.getValueID(C->getOperand(0)));
1108 Record.push_back(VE.getValueID(C->getOperand(1)));
1109 Record.push_back(CE->getPredicate());
1110 break;
1111 }
Chris Lattner837e04a2009-10-28 05:24:40 +00001112 } else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C)) {
Chris Lattner837e04a2009-10-28 05:24:40 +00001113 Code = bitc::CST_CODE_BLOCKADDRESS;
1114 Record.push_back(VE.getTypeID(BA->getFunction()->getType()));
1115 Record.push_back(VE.getValueID(BA->getFunction()));
1116 Record.push_back(VE.getGlobalBasicBlockID(BA->getBasicBlock()));
Chris Lattner2edd22b2007-04-24 00:16:04 +00001117 } else {
Dan Gohman29d27162010-07-21 21:18:37 +00001118#ifndef NDEBUG
1119 C->dump();
1120#endif
Torok Edwinc23197a2009-07-14 16:55:14 +00001121 llvm_unreachable("Unknown constant!");
Chris Lattner2edd22b2007-04-24 00:16:04 +00001122 }
1123 Stream.EmitRecord(Code, Record, AbbrevToUse);
1124 Record.clear();
1125 }
1126
1127 Stream.ExitBlock();
1128}
1129
1130static void WriteModuleConstants(const ValueEnumerator &VE,
1131 BitstreamWriter &Stream) {
1132 const ValueEnumerator::ValueList &Vals = VE.getValues();
Daniel Dunbara279bc32009-09-20 02:20:51 +00001133
Chris Lattner2edd22b2007-04-24 00:16:04 +00001134 // Find the first constant to emit, which is the first non-globalvalue value.
1135 // We know globalvalues have been emitted by WriteModuleInfo.
1136 for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
1137 if (!isa<GlobalValue>(Vals[i].first)) {
Devang Patel912538b2009-08-04 05:01:35 +00001138 WriteConstants(i, Vals.size(), VE, Stream, true);
Chris Lattner2edd22b2007-04-24 00:16:04 +00001139 return;
1140 }
1141 }
1142}
Chris Lattnerb992be12007-04-23 20:35:01 +00001143
Chris Lattner7337ab92007-05-06 00:00:00 +00001144/// PushValueAndType - The file has to encode both the value and type id for
1145/// many values, because we need to know what type to create for forward
1146/// references. However, most operands are not forward references, so this type
1147/// field is not needed.
1148///
1149/// This function adds V's value ID to Vals. If the value ID is higher than the
1150/// instruction ID, then it is a forward reference, and it also includes the
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001151/// type ID. The value ID that is written is encoded relative to the InstID.
Gabor Greif75a46eb2009-01-16 18:40:27 +00001152static bool PushValueAndType(const Value *V, unsigned InstID,
Craig Topper9e639e82013-07-11 16:22:38 +00001153 SmallVectorImpl<unsigned> &Vals,
Chris Lattner7337ab92007-05-06 00:00:00 +00001154 ValueEnumerator &VE) {
1155 unsigned ValID = VE.getValueID(V);
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001156 // Make encoding relative to the InstID.
1157 Vals.push_back(InstID - ValID);
Chris Lattner7337ab92007-05-06 00:00:00 +00001158 if (ValID >= InstID) {
1159 Vals.push_back(VE.getTypeID(V->getType()));
1160 return true;
1161 }
1162 return false;
1163}
1164
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001165/// pushValue - Like PushValueAndType, but where the type of the value is
1166/// omitted (perhaps it was already encoded in an earlier operand).
1167static void pushValue(const Value *V, unsigned InstID,
Craig Topper9e639e82013-07-11 16:22:38 +00001168 SmallVectorImpl<unsigned> &Vals,
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001169 ValueEnumerator &VE) {
1170 unsigned ValID = VE.getValueID(V);
1171 Vals.push_back(InstID - ValID);
1172}
1173
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001174static void pushValueSigned(const Value *V, unsigned InstID,
Craig Topper9e639e82013-07-11 16:22:38 +00001175 SmallVectorImpl<uint64_t> &Vals,
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001176 ValueEnumerator &VE) {
1177 unsigned ValID = VE.getValueID(V);
1178 int64_t diff = ((int32_t)InstID - (int32_t)ValID);
1179 emitSignedInt64(Vals, diff);
1180}
1181
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001182/// WriteInstruction - Emit an instruction to the specified stream.
Chris Lattner7337ab92007-05-06 00:00:00 +00001183static void WriteInstruction(const Instruction &I, unsigned InstID,
1184 ValueEnumerator &VE, BitstreamWriter &Stream,
Craig Topper9e639e82013-07-11 16:22:38 +00001185 SmallVectorImpl<unsigned> &Vals) {
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001186 unsigned Code = 0;
1187 unsigned AbbrevToUse = 0;
Devang Patele8e02132009-09-18 19:26:43 +00001188 VE.setInstructionID(&I);
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001189 switch (I.getOpcode()) {
1190 default:
1191 if (Instruction::isCast(I.getOpcode())) {
Chris Lattnerd309c752007-05-01 02:13:26 +00001192 Code = bitc::FUNC_CODE_INST_CAST;
Chris Lattnerf9f2e832007-05-06 02:38:57 +00001193 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1194 AbbrevToUse = FUNCTION_INST_CAST_ABBREV;
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001195 Vals.push_back(VE.getTypeID(I.getType()));
Chris Lattnerabfbf852007-05-06 00:21:25 +00001196 Vals.push_back(GetEncodedCastOpcode(I.getOpcode()));
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001197 } else {
1198 assert(isa<BinaryOperator>(I) && "Unknown instruction!");
Chris Lattnerf6398752007-05-02 04:26:36 +00001199 Code = bitc::FUNC_CODE_INST_BINOP;
Chris Lattnerf9f2e832007-05-06 02:38:57 +00001200 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1201 AbbrevToUse = FUNCTION_INST_BINOP_ABBREV;
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001202 pushValue(I.getOperand(1), InstID, Vals, VE);
Chris Lattnerabfbf852007-05-06 00:21:25 +00001203 Vals.push_back(GetEncodedBinaryOpcode(I.getOpcode()));
Dan Gohman1224c382009-07-20 21:19:07 +00001204 uint64_t Flags = GetOptimizationFlags(&I);
1205 if (Flags != 0) {
1206 if (AbbrevToUse == FUNCTION_INST_BINOP_ABBREV)
1207 AbbrevToUse = FUNCTION_INST_BINOP_FLAGS_ABBREV;
1208 Vals.push_back(Flags);
1209 }
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001210 }
1211 break;
Chris Lattnerd309c752007-05-01 02:13:26 +00001212
1213 case Instruction::GetElementPtr:
1214 Code = bitc::FUNC_CODE_INST_GEP;
Dan Gohmandd8004d2009-07-27 21:53:46 +00001215 if (cast<GEPOperator>(&I)->isInBounds())
1216 Code = bitc::FUNC_CODE_INST_INBOUNDS_GEP;
Chris Lattner7337ab92007-05-06 00:00:00 +00001217 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
1218 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
Chris Lattnerd309c752007-05-01 02:13:26 +00001219 break;
Dan Gohman0aab28b2008-05-31 19:11:15 +00001220 case Instruction::ExtractValue: {
Dan Gohmane4977cf2008-05-23 01:55:30 +00001221 Code = bitc::FUNC_CODE_INST_EXTRACTVAL;
Dan Gohman0aab28b2008-05-31 19:11:15 +00001222 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1223 const ExtractValueInst *EVI = cast<ExtractValueInst>(&I);
1224 for (const unsigned *i = EVI->idx_begin(), *e = EVI->idx_end(); i != e; ++i)
1225 Vals.push_back(*i);
Dan Gohmane4977cf2008-05-23 01:55:30 +00001226 break;
Dan Gohman0aab28b2008-05-31 19:11:15 +00001227 }
1228 case Instruction::InsertValue: {
Dan Gohmane4977cf2008-05-23 01:55:30 +00001229 Code = bitc::FUNC_CODE_INST_INSERTVAL;
Dan Gohman0aab28b2008-05-31 19:11:15 +00001230 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1231 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
1232 const InsertValueInst *IVI = cast<InsertValueInst>(&I);
1233 for (const unsigned *i = IVI->idx_begin(), *e = IVI->idx_end(); i != e; ++i)
1234 Vals.push_back(*i);
Dan Gohmane4977cf2008-05-23 01:55:30 +00001235 break;
Dan Gohman0aab28b2008-05-31 19:11:15 +00001236 }
Chris Lattnerd309c752007-05-01 02:13:26 +00001237 case Instruction::Select:
Dan Gohmanfb2bbbe2008-09-16 01:01:33 +00001238 Code = bitc::FUNC_CODE_INST_VSELECT;
Chris Lattnerabfbf852007-05-06 00:21:25 +00001239 PushValueAndType(I.getOperand(1), InstID, Vals, VE);
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001240 pushValue(I.getOperand(2), InstID, Vals, VE);
Dan Gohmanfb2bbbe2008-09-16 01:01:33 +00001241 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
Chris Lattnerd309c752007-05-01 02:13:26 +00001242 break;
1243 case Instruction::ExtractElement:
1244 Code = bitc::FUNC_CODE_INST_EXTRACTELT;
Chris Lattnerabfbf852007-05-06 00:21:25 +00001245 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001246 pushValue(I.getOperand(1), InstID, Vals, VE);
Chris Lattnerd309c752007-05-01 02:13:26 +00001247 break;
1248 case Instruction::InsertElement:
1249 Code = bitc::FUNC_CODE_INST_INSERTELT;
Chris Lattnerabfbf852007-05-06 00:21:25 +00001250 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001251 pushValue(I.getOperand(1), InstID, Vals, VE);
1252 pushValue(I.getOperand(2), InstID, Vals, VE);
Chris Lattnerd309c752007-05-01 02:13:26 +00001253 break;
1254 case Instruction::ShuffleVector:
1255 Code = bitc::FUNC_CODE_INST_SHUFFLEVEC;
Chris Lattnerabfbf852007-05-06 00:21:25 +00001256 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001257 pushValue(I.getOperand(1), InstID, Vals, VE);
1258 pushValue(I.getOperand(2), InstID, Vals, VE);
Chris Lattnerd309c752007-05-01 02:13:26 +00001259 break;
1260 case Instruction::ICmp:
1261 case Instruction::FCmp:
Nick Lewycky7f6aa2b2009-07-08 03:04:38 +00001262 // compare returning Int1Ty or vector of Int1Ty
1263 Code = bitc::FUNC_CODE_INST_CMP2;
Chris Lattner7337ab92007-05-06 00:00:00 +00001264 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001265 pushValue(I.getOperand(1), InstID, Vals, VE);
Chris Lattnerd309c752007-05-01 02:13:26 +00001266 Vals.push_back(cast<CmpInst>(I).getPredicate());
1267 break;
1268
Daniel Dunbara279bc32009-09-20 02:20:51 +00001269 case Instruction::Ret:
Devang Pateld9d99ff2008-02-26 01:29:32 +00001270 {
1271 Code = bitc::FUNC_CODE_INST_RET;
1272 unsigned NumOperands = I.getNumOperands();
Devang Pateld9d99ff2008-02-26 01:29:32 +00001273 if (NumOperands == 0)
1274 AbbrevToUse = FUNCTION_INST_RET_VOID_ABBREV;
1275 else if (NumOperands == 1) {
1276 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
1277 AbbrevToUse = FUNCTION_INST_RET_VAL_ABBREV;
1278 } else {
1279 for (unsigned i = 0, e = NumOperands; i != e; ++i)
1280 PushValueAndType(I.getOperand(i), InstID, Vals, VE);
1281 }
1282 }
Chris Lattnerd309c752007-05-01 02:13:26 +00001283 break;
1284 case Instruction::Br:
Gabor Greifae6ab1e2009-01-30 18:27:21 +00001285 {
1286 Code = bitc::FUNC_CODE_INST_BR;
David Blaikief12b3792013-02-11 01:16:51 +00001287 const BranchInst &II = cast<BranchInst>(I);
Gabor Greifae6ab1e2009-01-30 18:27:21 +00001288 Vals.push_back(VE.getValueID(II.getSuccessor(0)));
1289 if (II.isConditional()) {
1290 Vals.push_back(VE.getValueID(II.getSuccessor(1)));
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001291 pushValue(II.getCondition(), InstID, Vals, VE);
Gabor Greifae6ab1e2009-01-30 18:27:21 +00001292 }
Chris Lattnerd309c752007-05-01 02:13:26 +00001293 }
1294 break;
1295 case Instruction::Switch:
Stepan Dyatkovskiy24473122012-02-01 07:49:51 +00001296 {
1297 Code = bitc::FUNC_CODE_INST_SWITCH;
David Blaikief12b3792013-02-11 01:16:51 +00001298 const SwitchInst &SI = cast<SwitchInst>(I);
Bob Wilsondb3a9e62013-09-09 19:14:35 +00001299 Vals.push_back(VE.getTypeID(SI.getCondition()->getType()));
1300 pushValue(SI.getCondition(), InstID, Vals, VE);
1301 Vals.push_back(VE.getValueID(SI.getDefaultDest()));
David Blaikief12b3792013-02-11 01:16:51 +00001302 for (SwitchInst::ConstCaseIt i = SI.case_begin(), e = SI.case_end();
Stepan Dyatkovskiyc10fa6c2012-03-08 07:06:20 +00001303 i != e; ++i) {
Bob Wilsondb3a9e62013-09-09 19:14:35 +00001304 Vals.push_back(VE.getValueID(i.getCaseValue()));
1305 Vals.push_back(VE.getValueID(i.getCaseSuccessor()));
Stepan Dyatkovskiy24473122012-02-01 07:49:51 +00001306 }
1307 }
Chris Lattnerd309c752007-05-01 02:13:26 +00001308 break;
Chris Lattnerab21db72009-10-28 00:19:10 +00001309 case Instruction::IndirectBr:
1310 Code = bitc::FUNC_CODE_INST_INDIRECTBR;
Chris Lattnerf9be95f2009-10-27 19:13:16 +00001311 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001312 // Encode the address operand as relative, but not the basic blocks.
1313 pushValue(I.getOperand(0), InstID, Vals, VE);
1314 for (unsigned i = 1, e = I.getNumOperands(); i != e; ++i)
Chris Lattnerf9be95f2009-10-27 19:13:16 +00001315 Vals.push_back(VE.getValueID(I.getOperand(i)));
1316 break;
Michael Ilseman407a6162012-11-15 22:34:00 +00001317
Chris Lattner60ce9b52007-05-01 07:03:37 +00001318 case Instruction::Invoke: {
Gabor Greif75a46eb2009-01-16 18:40:27 +00001319 const InvokeInst *II = cast<InvokeInst>(&I);
1320 const Value *Callee(II->getCalledValue());
Chris Lattnerdb125cf2011-07-18 04:54:35 +00001321 PointerType *PTy = cast<PointerType>(Callee->getType());
1322 FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
Chris Lattnerd309c752007-05-01 02:13:26 +00001323 Code = bitc::FUNC_CODE_INST_INVOKE;
Daniel Dunbara279bc32009-09-20 02:20:51 +00001324
Devang Patel05988662008-09-25 21:00:45 +00001325 Vals.push_back(VE.getAttributeID(II->getAttributes()));
Duncan Sandsdc024672007-11-27 13:23:08 +00001326 Vals.push_back(II->getCallingConv());
Gabor Greif8fe53b72009-01-07 22:39:29 +00001327 Vals.push_back(VE.getValueID(II->getNormalDest()));
1328 Vals.push_back(VE.getValueID(II->getUnwindDest()));
Gabor Greif75a46eb2009-01-16 18:40:27 +00001329 PushValueAndType(Callee, InstID, Vals, VE);
Daniel Dunbara279bc32009-09-20 02:20:51 +00001330
Chris Lattnerd309c752007-05-01 02:13:26 +00001331 // Emit value #'s for the fixed parameters.
Chris Lattnerd309c752007-05-01 02:13:26 +00001332 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001333 pushValue(I.getOperand(i), InstID, Vals, VE); // fixed param.
Chris Lattnerd309c752007-05-01 02:13:26 +00001334
1335 // Emit type/value pairs for varargs params.
1336 if (FTy->isVarArg()) {
Gabor Greifc9f75002010-03-24 13:21:49 +00001337 for (unsigned i = FTy->getNumParams(), e = I.getNumOperands()-3;
Chris Lattner7337ab92007-05-06 00:00:00 +00001338 i != e; ++i)
1339 PushValueAndType(I.getOperand(i), InstID, Vals, VE); // vararg
Chris Lattnerd309c752007-05-01 02:13:26 +00001340 }
1341 break;
Chris Lattner60ce9b52007-05-01 07:03:37 +00001342 }
Bill Wendlingdccc03b2011-07-31 06:30:59 +00001343 case Instruction::Resume:
1344 Code = bitc::FUNC_CODE_INST_RESUME;
1345 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1346 break;
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001347 case Instruction::Unreachable:
1348 Code = bitc::FUNC_CODE_INST_UNREACHABLE;
Chris Lattner94687ac2007-05-06 01:28:01 +00001349 AbbrevToUse = FUNCTION_INST_UNREACHABLE_ABBREV;
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001350 break;
Daniel Dunbara279bc32009-09-20 02:20:51 +00001351
Jay Foadc1371202011-06-20 14:18:48 +00001352 case Instruction::PHI: {
1353 const PHINode &PN = cast<PHINode>(I);
Chris Lattnerd309c752007-05-01 02:13:26 +00001354 Code = bitc::FUNC_CODE_INST_PHI;
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001355 // With the newer instruction encoding, forward references could give
1356 // negative valued IDs. This is most common for PHIs, so we use
1357 // signed VBRs.
1358 SmallVector<uint64_t, 128> Vals64;
1359 Vals64.push_back(VE.getTypeID(PN.getType()));
Jay Foadc1371202011-06-20 14:18:48 +00001360 for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) {
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001361 pushValueSigned(PN.getIncomingValue(i), InstID, Vals64, VE);
1362 Vals64.push_back(VE.getValueID(PN.getIncomingBlock(i)));
Jay Foadc1371202011-06-20 14:18:48 +00001363 }
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001364 // Emit a Vals64 vector and exit.
1365 Stream.EmitRecord(Code, Vals64, AbbrevToUse);
1366 Vals64.clear();
1367 return;
Jay Foadc1371202011-06-20 14:18:48 +00001368 }
Daniel Dunbara279bc32009-09-20 02:20:51 +00001369
Bill Wendlinge6e88262011-08-12 20:24:12 +00001370 case Instruction::LandingPad: {
1371 const LandingPadInst &LP = cast<LandingPadInst>(I);
1372 Code = bitc::FUNC_CODE_INST_LANDINGPAD;
1373 Vals.push_back(VE.getTypeID(LP.getType()));
1374 PushValueAndType(LP.getPersonalityFn(), InstID, Vals, VE);
1375 Vals.push_back(LP.isCleanup());
1376 Vals.push_back(LP.getNumClauses());
1377 for (unsigned I = 0, E = LP.getNumClauses(); I != E; ++I) {
1378 if (LP.isCatch(I))
1379 Vals.push_back(LandingPadInst::Catch);
1380 else
1381 Vals.push_back(LandingPadInst::Filter);
1382 PushValueAndType(LP.getClause(I), InstID, Vals, VE);
1383 }
1384 break;
1385 }
1386
Chris Lattnerd309c752007-05-01 02:13:26 +00001387 case Instruction::Alloca:
1388 Code = bitc::FUNC_CODE_INST_ALLOCA;
1389 Vals.push_back(VE.getTypeID(I.getType()));
Dan Gohmana37dd3e2010-05-28 01:38:28 +00001390 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
Chris Lattnerd309c752007-05-01 02:13:26 +00001391 Vals.push_back(VE.getValueID(I.getOperand(0))); // size.
1392 Vals.push_back(Log2_32(cast<AllocaInst>(I).getAlignment())+1);
1393 break;
Daniel Dunbara279bc32009-09-20 02:20:51 +00001394
Chris Lattnerd309c752007-05-01 02:13:26 +00001395 case Instruction::Load:
Eli Friedman21006d42011-08-09 23:02:53 +00001396 if (cast<LoadInst>(I).isAtomic()) {
1397 Code = bitc::FUNC_CODE_INST_LOADATOMIC;
1398 PushValueAndType(I.getOperand(0), InstID, Vals, VE);
1399 } else {
1400 Code = bitc::FUNC_CODE_INST_LOAD;
1401 if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE)) // ptr
1402 AbbrevToUse = FUNCTION_INST_LOAD_ABBREV;
1403 }
Chris Lattnerd309c752007-05-01 02:13:26 +00001404 Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1);
1405 Vals.push_back(cast<LoadInst>(I).isVolatile());
Eli Friedman21006d42011-08-09 23:02:53 +00001406 if (cast<LoadInst>(I).isAtomic()) {
1407 Vals.push_back(GetEncodedOrdering(cast<LoadInst>(I).getOrdering()));
1408 Vals.push_back(GetEncodedSynchScope(cast<LoadInst>(I).getSynchScope()));
1409 }
Chris Lattnerd309c752007-05-01 02:13:26 +00001410 break;
1411 case Instruction::Store:
Eli Friedman21006d42011-08-09 23:02:53 +00001412 if (cast<StoreInst>(I).isAtomic())
1413 Code = bitc::FUNC_CODE_INST_STOREATOMIC;
1414 else
1415 Code = bitc::FUNC_CODE_INST_STORE;
Christopher Lambfe63fb92007-12-11 08:59:05 +00001416 PushValueAndType(I.getOperand(1), InstID, Vals, VE); // ptrty + ptr
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001417 pushValue(I.getOperand(0), InstID, Vals, VE); // val.
Chris Lattnerd309c752007-05-01 02:13:26 +00001418 Vals.push_back(Log2_32(cast<StoreInst>(I).getAlignment())+1);
1419 Vals.push_back(cast<StoreInst>(I).isVolatile());
Eli Friedman21006d42011-08-09 23:02:53 +00001420 if (cast<StoreInst>(I).isAtomic()) {
1421 Vals.push_back(GetEncodedOrdering(cast<StoreInst>(I).getOrdering()));
1422 Vals.push_back(GetEncodedSynchScope(cast<StoreInst>(I).getSynchScope()));
1423 }
Chris Lattnerd309c752007-05-01 02:13:26 +00001424 break;
Eli Friedmanff030482011-07-28 21:48:00 +00001425 case Instruction::AtomicCmpXchg:
1426 Code = bitc::FUNC_CODE_INST_CMPXCHG;
1427 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // ptrty + ptr
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001428 pushValue(I.getOperand(1), InstID, Vals, VE); // cmp.
1429 pushValue(I.getOperand(2), InstID, Vals, VE); // newval.
Eli Friedmanff030482011-07-28 21:48:00 +00001430 Vals.push_back(cast<AtomicCmpXchgInst>(I).isVolatile());
1431 Vals.push_back(GetEncodedOrdering(
1432 cast<AtomicCmpXchgInst>(I).getOrdering()));
1433 Vals.push_back(GetEncodedSynchScope(
1434 cast<AtomicCmpXchgInst>(I).getSynchScope()));
1435 break;
1436 case Instruction::AtomicRMW:
1437 Code = bitc::FUNC_CODE_INST_ATOMICRMW;
1438 PushValueAndType(I.getOperand(0), InstID, Vals, VE); // ptrty + ptr
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001439 pushValue(I.getOperand(1), InstID, Vals, VE); // val.
Eli Friedmanff030482011-07-28 21:48:00 +00001440 Vals.push_back(GetEncodedRMWOperation(
1441 cast<AtomicRMWInst>(I).getOperation()));
1442 Vals.push_back(cast<AtomicRMWInst>(I).isVolatile());
1443 Vals.push_back(GetEncodedOrdering(cast<AtomicRMWInst>(I).getOrdering()));
1444 Vals.push_back(GetEncodedSynchScope(
1445 cast<AtomicRMWInst>(I).getSynchScope()));
1446 break;
Eli Friedman47f35132011-07-25 23:16:38 +00001447 case Instruction::Fence:
1448 Code = bitc::FUNC_CODE_INST_FENCE;
1449 Vals.push_back(GetEncodedOrdering(cast<FenceInst>(I).getOrdering()));
1450 Vals.push_back(GetEncodedSynchScope(cast<FenceInst>(I).getSynchScope()));
1451 break;
Chris Lattnerd309c752007-05-01 02:13:26 +00001452 case Instruction::Call: {
Gabor Greiffc91e7d2010-06-26 09:35:09 +00001453 const CallInst &CI = cast<CallInst>(I);
Chris Lattnerdb125cf2011-07-18 04:54:35 +00001454 PointerType *PTy = cast<PointerType>(CI.getCalledValue()->getType());
1455 FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
Chris Lattnera9bb7132007-05-08 05:38:01 +00001456
Chris Lattner4f6bab92011-06-17 18:17:37 +00001457 Code = bitc::FUNC_CODE_INST_CALL;
Daniel Dunbara279bc32009-09-20 02:20:51 +00001458
Gabor Greiffc91e7d2010-06-26 09:35:09 +00001459 Vals.push_back(VE.getAttributeID(CI.getAttributes()));
1460 Vals.push_back((CI.getCallingConv() << 1) | unsigned(CI.isTailCall()));
1461 PushValueAndType(CI.getCalledValue(), InstID, Vals, VE); // Callee
Daniel Dunbara279bc32009-09-20 02:20:51 +00001462
Chris Lattnerd309c752007-05-01 02:13:26 +00001463 // Emit value #'s for the fixed parameters.
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001464 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) {
1465 // Check for labels (can happen with asm labels).
1466 if (FTy->getParamType(i)->isLabelTy())
1467 Vals.push_back(VE.getValueID(CI.getArgOperand(i)));
1468 else
1469 pushValue(CI.getArgOperand(i), InstID, Vals, VE); // fixed param.
1470 }
Daniel Dunbara279bc32009-09-20 02:20:51 +00001471
Chris Lattner60ce9b52007-05-01 07:03:37 +00001472 // Emit type/value pairs for varargs params.
1473 if (FTy->isVarArg()) {
Gabor Greiffc91e7d2010-06-26 09:35:09 +00001474 for (unsigned i = FTy->getNumParams(), e = CI.getNumArgOperands();
Chris Lattner7337ab92007-05-06 00:00:00 +00001475 i != e; ++i)
Gabor Greiffc91e7d2010-06-26 09:35:09 +00001476 PushValueAndType(CI.getArgOperand(i), InstID, Vals, VE); // varargs
Chris Lattnerd309c752007-05-01 02:13:26 +00001477 }
1478 break;
Chris Lattner60ce9b52007-05-01 07:03:37 +00001479 }
Chris Lattnerd309c752007-05-01 02:13:26 +00001480 case Instruction::VAArg:
1481 Code = bitc::FUNC_CODE_INST_VAARG;
1482 Vals.push_back(VE.getTypeID(I.getOperand(0)->getType())); // valistty
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001483 pushValue(I.getOperand(0), InstID, Vals, VE); // valist.
Chris Lattnerd309c752007-05-01 02:13:26 +00001484 Vals.push_back(VE.getTypeID(I.getType())); // restype.
1485 break;
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001486 }
Daniel Dunbara279bc32009-09-20 02:20:51 +00001487
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001488 Stream.EmitRecord(Code, Vals, AbbrevToUse);
1489 Vals.clear();
1490}
1491
Chris Lattnerbe1f9932007-05-01 02:14:57 +00001492// Emit names for globals/functions etc.
1493static void WriteValueSymbolTable(const ValueSymbolTable &VST,
1494 const ValueEnumerator &VE,
1495 BitstreamWriter &Stream) {
1496 if (VST.empty()) return;
Chris Lattnerff294a42007-05-05 01:26:50 +00001497 Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4);
Chris Lattner2e7899d2007-05-04 20:34:50 +00001498
Chris Lattnerbe1f9932007-05-01 02:14:57 +00001499 // FIXME: Set up the abbrev, we know how many values there are!
1500 // FIXME: We know if the type names can use 7-bit ascii.
1501 SmallVector<unsigned, 64> NameVals;
Daniel Dunbara279bc32009-09-20 02:20:51 +00001502
Chris Lattnerbe1f9932007-05-01 02:14:57 +00001503 for (ValueSymbolTable::const_iterator SI = VST.begin(), SE = VST.end();
1504 SI != SE; ++SI) {
Daniel Dunbara279bc32009-09-20 02:20:51 +00001505
Chris Lattner59698302007-05-04 20:52:02 +00001506 const ValueName &Name = *SI;
Daniel Dunbara279bc32009-09-20 02:20:51 +00001507
Chris Lattner59698302007-05-04 20:52:02 +00001508 // Figure out the encoding to use for the name.
1509 bool is7Bit = true;
Chris Lattnerff294a42007-05-05 01:26:50 +00001510 bool isChar6 = true;
1511 for (const char *C = Name.getKeyData(), *E = C+Name.getKeyLength();
1512 C != E; ++C) {
Daniel Dunbara279bc32009-09-20 02:20:51 +00001513 if (isChar6)
Chris Lattnerff294a42007-05-05 01:26:50 +00001514 isChar6 = BitCodeAbbrevOp::isChar6(*C);
1515 if ((unsigned char)*C & 128) {
Chris Lattner59698302007-05-04 20:52:02 +00001516 is7Bit = false;
Chris Lattnerff294a42007-05-05 01:26:50 +00001517 break; // don't bother scanning the rest.
Chris Lattner59698302007-05-04 20:52:02 +00001518 }
Chris Lattnerff294a42007-05-05 01:26:50 +00001519 }
Daniel Dunbara279bc32009-09-20 02:20:51 +00001520
Chris Lattnerfd1ae952007-05-04 21:31:13 +00001521 unsigned AbbrevToUse = VST_ENTRY_8_ABBREV;
Daniel Dunbara279bc32009-09-20 02:20:51 +00001522
Bill Wendling5d7a5a42011-04-10 23:18:04 +00001523 // VST_ENTRY: [valueid, namechar x N]
1524 // VST_BBENTRY: [bbid, namechar x N]
Chris Lattnere825ed52007-05-03 22:18:21 +00001525 unsigned Code;
Bill Wendling5d7a5a42011-04-10 23:18:04 +00001526 if (isa<BasicBlock>(SI->getValue())) {
1527 Code = bitc::VST_CODE_BBENTRY;
1528 if (isChar6)
1529 AbbrevToUse = VST_BBENTRY_6_ABBREV;
Chris Lattnere825ed52007-05-03 22:18:21 +00001530 } else {
1531 Code = bitc::VST_CODE_ENTRY;
Chris Lattnerff294a42007-05-05 01:26:50 +00001532 if (isChar6)
1533 AbbrevToUse = VST_ENTRY_6_ABBREV;
1534 else if (is7Bit)
1535 AbbrevToUse = VST_ENTRY_7_ABBREV;
Chris Lattnere825ed52007-05-03 22:18:21 +00001536 }
Daniel Dunbara279bc32009-09-20 02:20:51 +00001537
Chris Lattnere825ed52007-05-03 22:18:21 +00001538 NameVals.push_back(VE.getValueID(SI->getValue()));
Chris Lattner59698302007-05-04 20:52:02 +00001539 for (const char *P = Name.getKeyData(),
1540 *E = Name.getKeyData()+Name.getKeyLength(); P != E; ++P)
Chris Lattnerbe1f9932007-05-01 02:14:57 +00001541 NameVals.push_back((unsigned char)*P);
Daniel Dunbara279bc32009-09-20 02:20:51 +00001542
Chris Lattnerbe1f9932007-05-01 02:14:57 +00001543 // Emit the finished record.
Chris Lattnere825ed52007-05-03 22:18:21 +00001544 Stream.EmitRecord(Code, NameVals, AbbrevToUse);
Chris Lattnerbe1f9932007-05-01 02:14:57 +00001545 NameVals.clear();
1546 }
1547 Stream.ExitBlock();
1548}
1549
Chris Lattner8d35c792007-04-26 03:50:57 +00001550/// WriteFunction - Emit a function body to the module stream.
Daniel Dunbara279bc32009-09-20 02:20:51 +00001551static void WriteFunction(const Function &F, ValueEnumerator &VE,
Chris Lattner198f34a2007-04-26 03:27:58 +00001552 BitstreamWriter &Stream) {
Chris Lattnerf9f2e832007-05-06 02:38:57 +00001553 Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4);
Chad Rosier6a0c04d2011-06-03 17:02:19 +00001554 VE.incorporateFunction(F);
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001555
1556 SmallVector<unsigned, 64> Vals;
Daniel Dunbara279bc32009-09-20 02:20:51 +00001557
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001558 // Emit the number of basic blocks, so the reader can create them ahead of
1559 // time.
1560 Vals.push_back(VE.getBasicBlocks().size());
1561 Stream.EmitRecord(bitc::FUNC_CODE_DECLAREBLOCKS, Vals);
1562 Vals.clear();
Daniel Dunbara279bc32009-09-20 02:20:51 +00001563
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001564 // If there are function-local constants, emit them now.
1565 unsigned CstStart, CstEnd;
1566 VE.getFunctionConstantRange(CstStart, CstEnd);
Devang Patel912538b2009-08-04 05:01:35 +00001567 WriteConstants(CstStart, CstEnd, VE, Stream, false);
Daniel Dunbara279bc32009-09-20 02:20:51 +00001568
Victor Hernandez8ea5d4c2010-01-14 01:50:08 +00001569 // If there is function-local metadata, emit it now.
Victor Hernandez3cd7c3d2010-01-14 19:38:44 +00001570 WriteFunctionLocalMetadata(F, VE, Stream);
Victor Hernandez8ea5d4c2010-01-14 01:50:08 +00001571
Daniel Dunbara279bc32009-09-20 02:20:51 +00001572 // Keep a running idea of what the instruction ID is.
Chris Lattner7337ab92007-05-06 00:00:00 +00001573 unsigned InstID = CstEnd;
Daniel Dunbara279bc32009-09-20 02:20:51 +00001574
Chris Lattnera6245242010-04-03 02:17:50 +00001575 bool NeedsMetadataAttachment = false;
Michael Ilseman407a6162012-11-15 22:34:00 +00001576
Chris Lattnera6245242010-04-03 02:17:50 +00001577 DebugLoc LastDL;
Michael Ilseman407a6162012-11-15 22:34:00 +00001578
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001579 // Finally, emit all the instructions, in order.
Nick Lewycky280a6e62008-04-25 16:53:59 +00001580 for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
Chris Lattner7337ab92007-05-06 00:00:00 +00001581 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
1582 I != E; ++I) {
1583 WriteInstruction(*I, InstID, VE, Stream, Vals);
Michael Ilseman407a6162012-11-15 22:34:00 +00001584
Chris Lattner3990b122009-12-28 23:41:32 +00001585 if (!I->getType()->isVoidTy())
Chris Lattner7337ab92007-05-06 00:00:00 +00001586 ++InstID;
Michael Ilseman407a6162012-11-15 22:34:00 +00001587
Chris Lattnera6245242010-04-03 02:17:50 +00001588 // If the instruction has metadata, write a metadata attachment later.
1589 NeedsMetadataAttachment |= I->hasMetadataOtherThanDebugLoc();
Michael Ilseman407a6162012-11-15 22:34:00 +00001590
Chris Lattnera6245242010-04-03 02:17:50 +00001591 // If the instruction has a debug location, emit it.
1592 DebugLoc DL = I->getDebugLoc();
1593 if (DL.isUnknown()) {
1594 // nothing todo.
1595 } else if (DL == LastDL) {
1596 // Just repeat the same debug loc as last time.
1597 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC_AGAIN, Vals);
1598 } else {
1599 MDNode *Scope, *IA;
1600 DL.getScopeAndInlinedAt(Scope, IA, I->getContext());
Michael Ilseman407a6162012-11-15 22:34:00 +00001601
Chris Lattnera6245242010-04-03 02:17:50 +00001602 Vals.push_back(DL.getLine());
1603 Vals.push_back(DL.getCol());
1604 Vals.push_back(Scope ? VE.getValueID(Scope)+1 : 0);
1605 Vals.push_back(IA ? VE.getValueID(IA)+1 : 0);
Chris Lattner4f6bab92011-06-17 18:17:37 +00001606 Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC, Vals);
Chris Lattnera6245242010-04-03 02:17:50 +00001607 Vals.clear();
Michael Ilseman407a6162012-11-15 22:34:00 +00001608
Chris Lattnera6245242010-04-03 02:17:50 +00001609 LastDL = DL;
1610 }
Chris Lattner7337ab92007-05-06 00:00:00 +00001611 }
Daniel Dunbara279bc32009-09-20 02:20:51 +00001612
Chris Lattnerbe1f9932007-05-01 02:14:57 +00001613 // Emit names for all the instructions etc.
1614 WriteValueSymbolTable(F.getValueSymbolTable(), VE, Stream);
Devang Patele8e02132009-09-18 19:26:43 +00001615
Chris Lattnera6245242010-04-03 02:17:50 +00001616 if (NeedsMetadataAttachment)
1617 WriteMetadataAttachment(F, VE, Stream);
Chad Rosier6a0c04d2011-06-03 17:02:19 +00001618 VE.purgeFunction();
Chris Lattnerb9d0c2a2007-04-26 05:53:54 +00001619 Stream.ExitBlock();
Chris Lattner198f34a2007-04-26 03:27:58 +00001620}
1621
Chris Lattner07faafc2007-05-04 18:26:27 +00001622// Emit blockinfo, which defines the standard abbreviations etc.
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001623static void WriteBlockInfo(const ValueEnumerator &VE, BitstreamWriter &Stream) {
Chris Lattner07faafc2007-05-04 18:26:27 +00001624 // We only want to emit block info records for blocks that have multiple
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001625 // instances: CONSTANTS_BLOCK, FUNCTION_BLOCK and VALUE_SYMTAB_BLOCK.
Jan Wen Voung7b8d9492012-10-11 21:45:16 +00001626 // Other blocks can define their abbrevs inline.
Chris Lattnere17b6582007-05-05 00:17:00 +00001627 Stream.EnterBlockInfoBlock(2);
Daniel Dunbara279bc32009-09-20 02:20:51 +00001628
Chris Lattnere17b6582007-05-05 00:17:00 +00001629 { // 8-bit fixed-width VST_ENTRY/VST_BBENTRY strings.
1630 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1631 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3));
1632 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1633 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1634 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
Daniel Dunbara279bc32009-09-20 02:20:51 +00001635 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
Chris Lattnere17b6582007-05-05 00:17:00 +00001636 Abbv) != VST_ENTRY_8_ABBREV)
Torok Edwinc23197a2009-07-14 16:55:14 +00001637 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnere17b6582007-05-05 00:17:00 +00001638 }
Daniel Dunbara279bc32009-09-20 02:20:51 +00001639
Chris Lattnere17b6582007-05-05 00:17:00 +00001640 { // 7-bit fixed width VST_ENTRY strings.
1641 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1642 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
1643 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1644 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1645 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
1646 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1647 Abbv) != VST_ENTRY_7_ABBREV)
Torok Edwinc23197a2009-07-14 16:55:14 +00001648 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnere17b6582007-05-05 00:17:00 +00001649 }
Chris Lattnerff294a42007-05-05 01:26:50 +00001650 { // 6-bit char6 VST_ENTRY strings.
1651 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1652 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
1653 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1654 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
1655 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
1656 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
1657 Abbv) != VST_ENTRY_6_ABBREV)
Torok Edwinc23197a2009-07-14 16:55:14 +00001658 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnerff294a42007-05-05 01:26:50 +00001659 }
1660 { // 6-bit char6 VST_BBENTRY strings.
Chris Lattnere17b6582007-05-05 00:17:00 +00001661 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1662 Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_BBENTRY));
1663 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1664 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Chris Lattnerff294a42007-05-05 01:26:50 +00001665 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
Chris Lattnere17b6582007-05-05 00:17:00 +00001666 if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID,
Chris Lattnerff294a42007-05-05 01:26:50 +00001667 Abbv) != VST_BBENTRY_6_ABBREV)
Torok Edwinc23197a2009-07-14 16:55:14 +00001668 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnere17b6582007-05-05 00:17:00 +00001669 }
Bill Wendling5d7a5a42011-04-10 23:18:04 +00001670
1671
Daniel Dunbara279bc32009-09-20 02:20:51 +00001672
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001673 { // SETTYPE abbrev for CONSTANTS_BLOCK.
1674 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1675 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE));
1676 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
1677 Log2_32_Ceil(VE.getTypes().size()+1)));
1678 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1679 Abbv) != CONSTANTS_SETTYPE_ABBREV)
Torok Edwinc23197a2009-07-14 16:55:14 +00001680 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001681 }
Daniel Dunbara279bc32009-09-20 02:20:51 +00001682
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001683 { // INTEGER abbrev for CONSTANTS_BLOCK.
1684 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1685 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_INTEGER));
1686 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
1687 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1688 Abbv) != CONSTANTS_INTEGER_ABBREV)
Torok Edwinc23197a2009-07-14 16:55:14 +00001689 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001690 }
Daniel Dunbara279bc32009-09-20 02:20:51 +00001691
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001692 { // CE_CAST abbrev for CONSTANTS_BLOCK.
1693 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1694 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CE_CAST));
1695 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // cast opc
1696 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // typeid
1697 Log2_32_Ceil(VE.getTypes().size()+1)));
1698 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id
1699
1700 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1701 Abbv) != CONSTANTS_CE_CAST_Abbrev)
Torok Edwinc23197a2009-07-14 16:55:14 +00001702 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001703 }
1704 { // NULL abbrev for CONSTANTS_BLOCK.
1705 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1706 Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_NULL));
1707 if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID,
1708 Abbv) != CONSTANTS_NULL_Abbrev)
Torok Edwinc23197a2009-07-14 16:55:14 +00001709 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001710 }
Daniel Dunbara279bc32009-09-20 02:20:51 +00001711
Chris Lattner440168b2007-05-05 07:44:49 +00001712 // FIXME: This should only use space for first class types!
Daniel Dunbara279bc32009-09-20 02:20:51 +00001713
Chris Lattner440168b2007-05-05 07:44:49 +00001714 { // INST_LOAD abbrev for FUNCTION_BLOCK.
1715 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1716 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_LOAD));
Chris Lattner440168b2007-05-05 07:44:49 +00001717 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Ptr
1718 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // Align
1719 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // volatile
1720 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1721 Abbv) != FUNCTION_INST_LOAD_ABBREV)
Torok Edwinc23197a2009-07-14 16:55:14 +00001722 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattner440168b2007-05-05 07:44:49 +00001723 }
Chris Lattnerf9f2e832007-05-06 02:38:57 +00001724 { // INST_BINOP abbrev for FUNCTION_BLOCK.
1725 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1726 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
1727 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
1728 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
1729 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
1730 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1731 Abbv) != FUNCTION_INST_BINOP_ABBREV)
Torok Edwinc23197a2009-07-14 16:55:14 +00001732 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnerf9f2e832007-05-06 02:38:57 +00001733 }
Dan Gohman1224c382009-07-20 21:19:07 +00001734 { // INST_BINOP_FLAGS abbrev for FUNCTION_BLOCK.
1735 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1736 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
1737 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
1738 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
1739 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
1740 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7)); // flags
1741 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1742 Abbv) != FUNCTION_INST_BINOP_FLAGS_ABBREV)
1743 llvm_unreachable("Unexpected abbrev ordering!");
1744 }
Chris Lattnerf9f2e832007-05-06 02:38:57 +00001745 { // INST_CAST abbrev for FUNCTION_BLOCK.
1746 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1747 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_CAST));
1748 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpVal
1749 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
1750 Log2_32_Ceil(VE.getTypes().size()+1)));
1751 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
1752 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1753 Abbv) != FUNCTION_INST_CAST_ABBREV)
Torok Edwinc23197a2009-07-14 16:55:14 +00001754 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattnerf9f2e832007-05-06 02:38:57 +00001755 }
Daniel Dunbara279bc32009-09-20 02:20:51 +00001756
Chris Lattner94687ac2007-05-06 01:28:01 +00001757 { // INST_RET abbrev for FUNCTION_BLOCK.
1758 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1759 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
1760 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1761 Abbv) != FUNCTION_INST_RET_VOID_ABBREV)
Torok Edwinc23197a2009-07-14 16:55:14 +00001762 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattner94687ac2007-05-06 01:28:01 +00001763 }
1764 { // INST_RET abbrev for FUNCTION_BLOCK.
1765 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1766 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
1767 Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ValID
1768 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1769 Abbv) != FUNCTION_INST_RET_VAL_ABBREV)
Torok Edwinc23197a2009-07-14 16:55:14 +00001770 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattner94687ac2007-05-06 01:28:01 +00001771 }
1772 { // INST_UNREACHABLE abbrev for FUNCTION_BLOCK.
1773 BitCodeAbbrev *Abbv = new BitCodeAbbrev();
1774 Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_UNREACHABLE));
1775 if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
1776 Abbv) != FUNCTION_INST_UNREACHABLE_ABBREV)
Torok Edwinc23197a2009-07-14 16:55:14 +00001777 llvm_unreachable("Unexpected abbrev ordering!");
Chris Lattner94687ac2007-05-06 01:28:01 +00001778 }
Daniel Dunbara279bc32009-09-20 02:20:51 +00001779
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001780 Stream.ExitBlock();
1781}
1782
Michael Ilseman407a6162012-11-15 22:34:00 +00001783// Sort the Users based on the order in which the reader parses the bitcode
Chad Rosier32c59812011-12-07 22:49:05 +00001784// file.
1785static bool bitcodereader_order(const User *lhs, const User *rhs) {
1786 // TODO: Implement.
1787 return true;
1788}
1789
1790static void WriteUseList(const Value *V, const ValueEnumerator &VE,
1791 BitstreamWriter &Stream) {
1792
1793 // One or zero uses can't get out of order.
1794 if (V->use_empty() || V->hasNUses(1))
1795 return;
1796
1797 // Make a copy of the in-memory use-list for sorting.
1798 unsigned UseListSize = std::distance(V->use_begin(), V->use_end());
1799 SmallVector<const User*, 8> UseList;
1800 UseList.reserve(UseListSize);
1801 for (Value::const_use_iterator I = V->use_begin(), E = V->use_end();
1802 I != E; ++I) {
1803 const User *U = *I;
1804 UseList.push_back(U);
1805 }
1806
1807 // Sort the copy based on the order read by the BitcodeReader.
1808 std::sort(UseList.begin(), UseList.end(), bitcodereader_order);
1809
1810 // TODO: Generate a diff between the BitcodeWriter in-memory use-list and the
1811 // sorted list (i.e., the expected BitcodeReader in-memory use-list).
1812
1813 // TODO: Emit the USELIST_CODE_ENTRYs.
1814}
1815
1816static void WriteFunctionUseList(const Function *F, ValueEnumerator &VE,
1817 BitstreamWriter &Stream) {
1818 VE.incorporateFunction(*F);
1819
1820 for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
1821 AI != AE; ++AI)
1822 WriteUseList(AI, VE, Stream);
1823 for (Function::const_iterator BB = F->begin(), FE = F->end(); BB != FE;
1824 ++BB) {
1825 WriteUseList(BB, VE, Stream);
1826 for (BasicBlock::const_iterator II = BB->begin(), IE = BB->end(); II != IE;
1827 ++II) {
1828 WriteUseList(II, VE, Stream);
1829 for (User::const_op_iterator OI = II->op_begin(), E = II->op_end();
1830 OI != E; ++OI) {
1831 if ((isa<Constant>(*OI) && !isa<GlobalValue>(*OI)) ||
1832 isa<InlineAsm>(*OI))
1833 WriteUseList(*OI, VE, Stream);
1834 }
1835 }
1836 }
1837 VE.purgeFunction();
1838}
1839
Chad Rosiercbbb0962011-12-07 21:44:12 +00001840// Emit use-lists.
1841static void WriteModuleUseLists(const Module *M, ValueEnumerator &VE,
1842 BitstreamWriter &Stream) {
1843 Stream.EnterSubblock(bitc::USELIST_BLOCK_ID, 3);
1844
Chad Rosier32c59812011-12-07 22:49:05 +00001845 // XXX: this modifies the module, but in a way that should never change the
1846 // behavior of any pass or codegen in LLVM. The problem is that GVs may
1847 // contain entries in the use_list that do not exist in the Module and are
1848 // not stored in the .bc file.
1849 for (Module::const_global_iterator I = M->global_begin(), E = M->global_end();
1850 I != E; ++I)
1851 I->removeDeadConstantUsers();
Michael Ilseman407a6162012-11-15 22:34:00 +00001852
Chad Rosier32c59812011-12-07 22:49:05 +00001853 // Write the global variables.
Michael Ilseman407a6162012-11-15 22:34:00 +00001854 for (Module::const_global_iterator GI = M->global_begin(),
Chad Rosier32c59812011-12-07 22:49:05 +00001855 GE = M->global_end(); GI != GE; ++GI) {
1856 WriteUseList(GI, VE, Stream);
Chad Rosiercbbb0962011-12-07 21:44:12 +00001857
Chad Rosier32c59812011-12-07 22:49:05 +00001858 // Write the global variable initializers.
1859 if (GI->hasInitializer())
1860 WriteUseList(GI->getInitializer(), VE, Stream);
1861 }
1862
1863 // Write the functions.
1864 for (Module::const_iterator FI = M->begin(), FE = M->end(); FI != FE; ++FI) {
1865 WriteUseList(FI, VE, Stream);
1866 if (!FI->isDeclaration())
1867 WriteFunctionUseList(FI, VE, Stream);
Peter Collingbourne1e3037f2013-09-16 01:08:15 +00001868 if (FI->hasPrefixData())
1869 WriteUseList(FI->getPrefixData(), VE, Stream);
Chad Rosier32c59812011-12-07 22:49:05 +00001870 }
1871
1872 // Write the aliases.
1873 for (Module::const_alias_iterator AI = M->alias_begin(), AE = M->alias_end();
1874 AI != AE; ++AI) {
1875 WriteUseList(AI, VE, Stream);
1876 WriteUseList(AI->getAliasee(), VE, Stream);
1877 }
Chad Rosiercbbb0962011-12-07 21:44:12 +00001878
1879 Stream.ExitBlock();
1880}
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001881
1882/// WriteModule - Emit the specified module to the bitstream.
1883static void WriteModule(const Module *M, BitstreamWriter &Stream) {
1884 Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3);
Daniel Dunbara279bc32009-09-20 02:20:51 +00001885
Jan Wen Voungd9a3bad2012-10-11 20:20:40 +00001886 SmallVector<unsigned, 1> Vals;
1887 unsigned CurVersion = 1;
1888 Vals.push_back(CurVersion);
1889 Stream.EmitRecord(bitc::MODULE_CODE_VERSION, Vals);
Daniel Dunbara279bc32009-09-20 02:20:51 +00001890
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001891 // Analyze the module, enumerating globals, functions, etc.
1892 ValueEnumerator VE(M);
1893
1894 // Emit blockinfo, which defines the standard abbreviations etc.
1895 WriteBlockInfo(VE, Stream);
Daniel Dunbara279bc32009-09-20 02:20:51 +00001896
Bill Wendling0f715c22013-02-10 23:09:32 +00001897 // Emit information about attribute groups.
1898 WriteAttributeGroupTable(VE, Stream);
1899
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001900 // Emit information about parameter attributes.
Devang Patel05988662008-09-25 21:00:45 +00001901 WriteAttributeTable(VE, Stream);
Daniel Dunbara279bc32009-09-20 02:20:51 +00001902
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001903 // Emit information describing all of the types in the module.
1904 WriteTypeTable(VE, Stream);
Daniel Dunbara279bc32009-09-20 02:20:51 +00001905
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001906 // Emit top-level description of module, including target triple, inline asm,
1907 // descriptors for global variables, and function prototype info.
1908 WriteModuleInfo(M, VE, Stream);
Devang Patele54abc92009-07-22 17:43:22 +00001909
Devang Patel104cf9e2009-07-23 01:07:34 +00001910 // Emit constants.
1911 WriteModuleConstants(VE, Stream);
1912
Devang Patel912538b2009-08-04 05:01:35 +00001913 // Emit metadata.
Dan Gohman17aa92c2010-07-21 23:38:33 +00001914 WriteModuleMetadata(M, VE, Stream);
Devang Patel912538b2009-08-04 05:01:35 +00001915
Devang Patele8e02132009-09-18 19:26:43 +00001916 // Emit metadata.
Chris Lattner7d05c462009-12-28 20:10:43 +00001917 WriteModuleMetadataStore(M, Stream);
Daniel Dunbara279bc32009-09-20 02:20:51 +00001918
Chris Lattnera0f1ecc2007-05-05 07:36:14 +00001919 // Emit names for globals/functions etc.
1920 WriteValueSymbolTable(M->getValueSymbolTable(), VE, Stream);
Daniel Dunbara279bc32009-09-20 02:20:51 +00001921
Chad Rosiercbbb0962011-12-07 21:44:12 +00001922 // Emit use-lists.
1923 if (EnablePreserveUseListOrdering)
1924 WriteModuleUseLists(M, VE, Stream);
1925
Derek Schuff2ea93872012-02-06 22:30:29 +00001926 // Emit function bodies.
1927 for (Module::const_iterator F = M->begin(), E = M->end(); F != E; ++F)
1928 if (!F->isDeclaration())
1929 WriteFunction(*F, VE, Stream);
1930
Chris Lattner07faafc2007-05-04 18:26:27 +00001931 Stream.ExitBlock();
1932}
1933
Chris Lattner6fa6a322008-07-09 05:14:23 +00001934/// EmitDarwinBCHeader - If generating a bc file on darwin, we have to emit a
1935/// header and trailer to make it compatible with the system archiver. To do
1936/// this we emit the following header, and then emit a trailer that pads the
1937/// file out to be a multiple of 16 bytes.
Daniel Dunbara279bc32009-09-20 02:20:51 +00001938///
Chris Lattner6fa6a322008-07-09 05:14:23 +00001939/// struct bc_header {
1940/// uint32_t Magic; // 0x0B17C0DE
1941/// uint32_t Version; // Version, currently always 0.
1942/// uint32_t BitcodeOffset; // Offset to traditional bitcode file.
1943/// uint32_t BitcodeSize; // Size of traditional bitcode file.
1944/// uint32_t CPUType; // CPU specifier.
1945/// ... potentially more later ...
1946/// };
1947enum {
1948 DarwinBCSizeFieldOffset = 3*4, // Offset to bitcode_size.
1949 DarwinBCHeaderSize = 5*4
1950};
1951
Daniel Dunbaracbceea2012-02-29 20:31:09 +00001952static void WriteInt32ToBuffer(uint32_t Value, SmallVectorImpl<char> &Buffer,
Daniel Dunbar02a248a2012-02-29 20:31:01 +00001953 uint32_t &Position) {
1954 Buffer[Position + 0] = (unsigned char) (Value >> 0);
1955 Buffer[Position + 1] = (unsigned char) (Value >> 8);
1956 Buffer[Position + 2] = (unsigned char) (Value >> 16);
1957 Buffer[Position + 3] = (unsigned char) (Value >> 24);
1958 Position += 4;
1959}
1960
Daniel Dunbaracbceea2012-02-29 20:31:09 +00001961static void EmitDarwinBCHeaderAndTrailer(SmallVectorImpl<char> &Buffer,
Daniel Dunbar02a248a2012-02-29 20:31:01 +00001962 const Triple &TT) {
Chris Lattner6fa6a322008-07-09 05:14:23 +00001963 unsigned CPUType = ~0U;
Daniel Dunbara279bc32009-09-20 02:20:51 +00001964
Evan Cheng0f8868b2010-02-12 20:13:44 +00001965 // Match x86_64-*, i[3-9]86-*, powerpc-*, powerpc64-*, arm-*, thumb-*,
Evan Cheng3922a9b2010-02-12 20:39:35 +00001966 // armv[0-9]-*, thumbv[0-9]-*, armv5te-*, or armv6t2-*. The CPUType is a magic
1967 // number from /usr/include/mach/machine.h. It is ok to reproduce the
1968 // specific constants here because they are implicitly part of the Darwin ABI.
Chris Lattner6fa6a322008-07-09 05:14:23 +00001969 enum {
1970 DARWIN_CPU_ARCH_ABI64 = 0x01000000,
1971 DARWIN_CPU_TYPE_X86 = 7,
Evan Cheng0f8868b2010-02-12 20:13:44 +00001972 DARWIN_CPU_TYPE_ARM = 12,
Chris Lattner6fa6a322008-07-09 05:14:23 +00001973 DARWIN_CPU_TYPE_POWERPC = 18
1974 };
Daniel Dunbara279bc32009-09-20 02:20:51 +00001975
Evan Chenge889c692011-06-14 01:51:33 +00001976 Triple::ArchType Arch = TT.getArch();
1977 if (Arch == Triple::x86_64)
Chris Lattner6fa6a322008-07-09 05:14:23 +00001978 CPUType = DARWIN_CPU_TYPE_X86 | DARWIN_CPU_ARCH_ABI64;
Evan Chenge889c692011-06-14 01:51:33 +00001979 else if (Arch == Triple::x86)
Chris Lattner6fa6a322008-07-09 05:14:23 +00001980 CPUType = DARWIN_CPU_TYPE_X86;
Evan Chenge889c692011-06-14 01:51:33 +00001981 else if (Arch == Triple::ppc)
Chris Lattner6fa6a322008-07-09 05:14:23 +00001982 CPUType = DARWIN_CPU_TYPE_POWERPC;
Evan Chenge889c692011-06-14 01:51:33 +00001983 else if (Arch == Triple::ppc64)
Chris Lattner6fa6a322008-07-09 05:14:23 +00001984 CPUType = DARWIN_CPU_TYPE_POWERPC | DARWIN_CPU_ARCH_ABI64;
Evan Chenge889c692011-06-14 01:51:33 +00001985 else if (Arch == Triple::arm || Arch == Triple::thumb)
Evan Cheng0f8868b2010-02-12 20:13:44 +00001986 CPUType = DARWIN_CPU_TYPE_ARM;
Daniel Dunbara279bc32009-09-20 02:20:51 +00001987
Chris Lattner6fa6a322008-07-09 05:14:23 +00001988 // Traditional Bitcode starts after header.
Daniel Dunbar02a248a2012-02-29 20:31:01 +00001989 assert(Buffer.size() >= DarwinBCHeaderSize &&
1990 "Expected header size to be reserved");
Chris Lattner6fa6a322008-07-09 05:14:23 +00001991 unsigned BCOffset = DarwinBCHeaderSize;
Daniel Dunbar02a248a2012-02-29 20:31:01 +00001992 unsigned BCSize = Buffer.size()-DarwinBCHeaderSize;
Daniel Dunbara279bc32009-09-20 02:20:51 +00001993
Daniel Dunbar02a248a2012-02-29 20:31:01 +00001994 // Write the magic and version.
1995 unsigned Position = 0;
1996 WriteInt32ToBuffer(0x0B17C0DE , Buffer, Position);
1997 WriteInt32ToBuffer(0 , Buffer, Position); // Version.
1998 WriteInt32ToBuffer(BCOffset , Buffer, Position);
1999 WriteInt32ToBuffer(BCSize , Buffer, Position);
2000 WriteInt32ToBuffer(CPUType , Buffer, Position);
Daniel Dunbara279bc32009-09-20 02:20:51 +00002001
Chris Lattner6fa6a322008-07-09 05:14:23 +00002002 // If the file is not a multiple of 16 bytes, insert dummy padding.
Daniel Dunbar02a248a2012-02-29 20:31:01 +00002003 while (Buffer.size() & 15)
2004 Buffer.push_back(0);
Chris Lattner6fa6a322008-07-09 05:14:23 +00002005}
2006
Chris Lattnerfd57cec2007-04-22 06:24:45 +00002007/// WriteBitcodeToFile - Write the specified module to the specified output
2008/// stream.
Daniel Dunbard1ce3b42008-10-22 17:39:14 +00002009void llvm::WriteBitcodeToFile(const Module *M, raw_ostream &Out) {
Michael Ilsemandbd7b952012-12-03 21:29:36 +00002010 SmallVector<char, 0> Buffer;
Chris Lattnerfd57cec2007-04-22 06:24:45 +00002011 Buffer.reserve(256*1024);
Chris Lattner38e77212008-12-19 18:37:59 +00002012
Daniel Dunbar02a248a2012-02-29 20:31:01 +00002013 // If this is darwin or another generic macho target, reserve space for the
2014 // header.
2015 Triple TT(M->getTargetTriple());
2016 if (TT.isOSDarwin())
2017 Buffer.insert(Buffer.begin(), DarwinBCHeaderSize, 0);
2018
2019 // Emit the module into the buffer.
2020 {
2021 BitstreamWriter Stream(Buffer);
2022
2023 // Emit the file header.
2024 Stream.Emit((unsigned)'B', 8);
2025 Stream.Emit((unsigned)'C', 8);
2026 Stream.Emit(0x0, 4);
2027 Stream.Emit(0xC, 4);
2028 Stream.Emit(0xE, 4);
2029 Stream.Emit(0xD, 4);
2030
2031 // Emit the module.
2032 WriteModule(M, Stream);
2033 }
2034
2035 if (TT.isOSDarwin())
2036 EmitDarwinBCHeaderAndTrailer(Buffer, TT);
Daniel Dunbara279bc32009-09-20 02:20:51 +00002037
Chris Lattner38e77212008-12-19 18:37:59 +00002038 // Write the generated bitstream to "Out".
2039 Out.write((char*)&Buffer.front(), Buffer.size());
Chris Lattner38e77212008-12-19 18:37:59 +00002040}