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Daniel Dunbarbd012ff2008-07-29 23:18:29 +00001//===-- CodeGenFunction.h - Per-Function state for LLVM CodeGen -*- C++ -*-===//
Reid Spencer5f016e22007-07-11 17:01:13 +00002//
3// The LLVM Compiler Infrastructure
4//
Chris Lattner0bc735f2007-12-29 19:59:25 +00005// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
Reid Spencer5f016e22007-07-11 17:01:13 +00007//
8//===----------------------------------------------------------------------===//
9//
Mike Stump0dd9e882009-02-08 23:14:22 +000010// This is the internal per-function state used for llvm translation.
Reid Spencer5f016e22007-07-11 17:01:13 +000011//
12//===----------------------------------------------------------------------===//
13
Chris Lattneref52a2f2008-02-29 17:10:38 +000014#ifndef CLANG_CODEGEN_CODEGENFUNCTION_H
15#define CLANG_CODEGEN_CODEGENFUNCTION_H
Reid Spencer5f016e22007-07-11 17:01:13 +000016
Chris Lattner391d77a2008-03-30 23:03:07 +000017#include "clang/AST/Type.h"
Argyrios Kyrtzidise3a09e62008-09-10 02:36:38 +000018#include "clang/AST/ExprCXX.h"
Ted Kremenek55499762008-06-17 02:43:46 +000019#include "clang/AST/ExprObjC.h"
Ken Dyck199c3d62010-01-11 17:06:35 +000020#include "clang/AST/CharUnits.h"
Chris Lattner481769b2009-03-31 22:17:44 +000021#include "clang/Basic/TargetInfo.h"
22#include "llvm/ADT/DenseMap.h"
23#include "llvm/ADT/SmallVector.h"
24#include "llvm/Support/ValueHandle.h"
Owen Anderson69243822009-07-13 04:10:07 +000025#include "CodeGenModule.h"
Mike Stump96bd13a2009-03-04 15:32:52 +000026#include "CGBlocks.h"
Daniel Dunbar45d196b2008-11-01 01:53:16 +000027#include "CGBuilder.h"
Daniel Dunbar0dbe2272008-09-08 21:33:45 +000028#include "CGCall.h"
Anders Carlssonb14095a2009-04-17 00:06:03 +000029#include "CGCXX.h"
Daniel Dunbar8f2926b2008-08-23 03:46:30 +000030#include "CGValue.h"
31
Reid Spencer5f016e22007-07-11 17:01:13 +000032namespace llvm {
Daniel Dunbarc4a1dea2008-08-11 05:35:13 +000033 class BasicBlock;
Benjamin Kramerf21efe92009-08-11 17:46:57 +000034 class LLVMContext;
David Chisnalldd5c98f2010-05-01 11:15:56 +000035 class MDNode;
Reid Spencer5f016e22007-07-11 17:01:13 +000036 class Module;
Daniel Dunbar898d5082008-09-30 01:06:03 +000037 class SwitchInst;
Daniel Dunbar259e9cc2009-10-19 01:21:05 +000038 class Twine;
Daniel Dunbared3849b2008-11-19 09:36:46 +000039 class Value;
Reid Spencer5f016e22007-07-11 17:01:13 +000040}
41
42namespace clang {
43 class ASTContext;
Anders Carlsson7267c162009-05-29 21:03:38 +000044 class CXXDestructorDecl;
Anders Carlsson6815e942009-09-27 18:58:34 +000045 class CXXTryStmt;
Reid Spencer5f016e22007-07-11 17:01:13 +000046 class Decl;
Daniel Dunbarc4a1dea2008-08-11 05:35:13 +000047 class EnumConstantDecl;
Reid Spencer5f016e22007-07-11 17:01:13 +000048 class FunctionDecl;
Douglas Gregor72564e72009-02-26 23:50:07 +000049 class FunctionProtoType;
Daniel Dunbarc4a1dea2008-08-11 05:35:13 +000050 class LabelStmt;
Fariborz Jahanian679a5022009-01-10 21:06:09 +000051 class ObjCContainerDecl;
Daniel Dunbar29e0bcc2008-09-24 04:00:38 +000052 class ObjCInterfaceDecl;
53 class ObjCIvarDecl;
Chris Lattner391d77a2008-03-30 23:03:07 +000054 class ObjCMethodDecl;
Fariborz Jahanianfef30b52008-12-09 20:23:04 +000055 class ObjCImplementationDecl;
Daniel Dunbaraf05bb92008-08-26 08:29:31 +000056 class ObjCPropertyImplDecl;
Reid Spencer5f016e22007-07-11 17:01:13 +000057 class TargetInfo;
John McCall492c4f92010-03-03 04:15:11 +000058 class TargetCodeGenInfo;
Daniel Dunbarc4a1dea2008-08-11 05:35:13 +000059 class VarDecl;
Chris Lattner16f00492009-04-26 01:32:48 +000060 class ObjCForCollectionStmt;
61 class ObjCAtTryStmt;
62 class ObjCAtThrowStmt;
63 class ObjCAtSynchronizedStmt;
Devang Patelb84a06e2007-10-23 02:10:49 +000064
Reid Spencer5f016e22007-07-11 17:01:13 +000065namespace CodeGen {
Devang Patelb84a06e2007-10-23 02:10:49 +000066 class CodeGenTypes;
Anders Carlssone896d982009-02-13 08:11:52 +000067 class CGDebugInfo;
Daniel Dunbarbb36d332009-02-02 21:43:58 +000068 class CGFunctionInfo;
Mike Stump0dd9e882009-02-08 23:14:22 +000069 class CGRecordLayout;
John McCallee504292010-05-21 04:11:14 +000070 class CGBlockInfo;
Mike Stump0dd9e882009-02-08 23:14:22 +000071
Reid Spencer5f016e22007-07-11 17:01:13 +000072/// CodeGenFunction - This class organizes the per-function state that is used
73/// while generating LLVM code.
Mike Stump2a998142009-03-04 18:17:45 +000074class CodeGenFunction : public BlockFunction {
Anders Carlsson8a219ce2009-02-24 04:21:31 +000075 CodeGenFunction(const CodeGenFunction&); // DO NOT IMPLEMENT
76 void operator=(const CodeGenFunction&); // DO NOT IMPLEMENT
Chris Lattnerbfc0c1a2007-08-26 23:13:56 +000077public:
Reid Spencer5f016e22007-07-11 17:01:13 +000078 CodeGenModule &CGM; // Per-module state.
Daniel Dunbar444be732009-11-13 05:51:54 +000079 const TargetInfo &Target;
Mike Stump0dd9e882009-02-08 23:14:22 +000080
Chris Lattner58dee102007-08-21 16:57:55 +000081 typedef std::pair<llvm::Value *, llvm::Value *> ComplexPairTy;
Daniel Dunbar45d196b2008-11-01 01:53:16 +000082 CGBuilderTy Builder;
Mike Stump0dd9e882009-02-08 23:14:22 +000083
Chris Lattnerb5437d22009-04-23 05:30:27 +000084 /// CurFuncDecl - Holds the Decl for the current function or ObjC method.
85 /// This excludes BlockDecls.
Chris Lattner41110242008-06-17 18:05:57 +000086 const Decl *CurFuncDecl;
Chris Lattnerb5437d22009-04-23 05:30:27 +000087 /// CurCodeDecl - This is the inner-most code context, which includes blocks.
88 const Decl *CurCodeDecl;
Daniel Dunbar88b53962009-02-02 22:03:45 +000089 const CGFunctionInfo *CurFnInfo;
Chris Lattner391d77a2008-03-30 23:03:07 +000090 QualType FnRetTy;
Reid Spencer5f016e22007-07-11 17:01:13 +000091 llvm::Function *CurFn;
92
Mike Stump6a1e0eb2009-12-04 23:26:17 +000093 /// CurGD - The GlobalDecl for the current function being compiled.
94 GlobalDecl CurGD;
Mike Stump6a1e0eb2009-12-04 23:26:17 +000095
Daniel Dunbar5ca20842008-09-09 21:00:17 +000096 /// ReturnBlock - Unified return block.
97 llvm::BasicBlock *ReturnBlock;
Mike Stump0dd9e882009-02-08 23:14:22 +000098 /// ReturnValue - The temporary alloca to hold the return value. This is null
99 /// iff the function has no return value.
Eli Friedmanb17daf92009-12-04 02:43:40 +0000100 llvm::Value *ReturnValue;
Mike Stump0dd9e882009-02-08 23:14:22 +0000101
Reid Spencer5f016e22007-07-11 17:01:13 +0000102 /// AllocaInsertPoint - This is an instruction in the entry block before which
103 /// we prefer to insert allocas.
Chris Lattner481769b2009-03-31 22:17:44 +0000104 llvm::AssertingVH<llvm::Instruction> AllocaInsertPt;
Daniel Dunbar0ffb1252008-08-04 16:51:22 +0000105
Reid Spencer5f016e22007-07-11 17:01:13 +0000106 const llvm::Type *LLVMIntTy;
Hartmut Kaiser7b660002007-10-17 15:00:17 +0000107 uint32_t LLVMPointerWidth;
Daniel Dunbar18ccc772008-09-28 01:03:14 +0000108
Mike Stumpd88ea562009-12-09 03:35:49 +0000109 bool Exceptions;
Mike Stump9c276ae2009-12-12 01:27:46 +0000110 bool CatchUndefined;
Douglas Gregor3d91bbc2010-05-17 15:52:46 +0000111
112 /// \brief A mapping from NRVO variables to the flags used to indicate
113 /// when the NRVO has been applied to this variable.
114 llvm::DenseMap<const VarDecl *, llvm::Value *> NRVOFlags;
115
Daniel Dunbar18ccc772008-09-28 01:03:14 +0000116public:
Anders Carlssonfa1f7562009-02-10 06:07:49 +0000117 /// ObjCEHValueStack - Stack of Objective-C exception values, used for
118 /// rethrows.
Anders Carlsson273558f2009-02-07 21:37:21 +0000119 llvm::SmallVector<llvm::Value*, 8> ObjCEHValueStack;
Mike Stump0dd9e882009-02-08 23:14:22 +0000120
Anders Carlsson6fc55912009-02-08 03:22:36 +0000121 /// PushCleanupBlock - Push a new cleanup entry on the stack and set the
122 /// passed in block as the cleanup block.
Fariborz Jahanian77996212009-11-04 17:57:40 +0000123 void PushCleanupBlock(llvm::BasicBlock *CleanupEntryBlock,
Mike Stumpd88ea562009-12-09 03:35:49 +0000124 llvm::BasicBlock *CleanupExitBlock,
125 llvm::BasicBlock *PreviousInvokeDest,
Mike Stump99533832009-12-02 07:41:41 +0000126 bool EHOnly = false);
Mike Stumpd88ea562009-12-09 03:35:49 +0000127 void PushCleanupBlock(llvm::BasicBlock *CleanupEntryBlock) {
128 PushCleanupBlock(CleanupEntryBlock, 0, getInvokeDest(), false);
129 }
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000130
Mike Stump0dd9e882009-02-08 23:14:22 +0000131 /// CleanupBlockInfo - A struct representing a popped cleanup block.
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000132 struct CleanupBlockInfo {
Fariborz Jahanian77996212009-11-04 17:57:40 +0000133 /// CleanupEntryBlock - the cleanup entry block
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000134 llvm::BasicBlock *CleanupBlock;
Mike Stump0dd9e882009-02-08 23:14:22 +0000135
136 /// SwitchBlock - the block (if any) containing the switch instruction used
137 /// for jumping to the final destination.
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000138 llvm::BasicBlock *SwitchBlock;
Mike Stump0dd9e882009-02-08 23:14:22 +0000139
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000140 /// EndBlock - the default destination for the switch instruction.
141 llvm::BasicBlock *EndBlock;
Mike Stump0dd9e882009-02-08 23:14:22 +0000142
Mike Stump99533832009-12-02 07:41:41 +0000143 /// EHOnly - True iff this cleanup should only be performed on the
144 /// exceptional edge.
145 bool EHOnly;
146
Mike Stump0dd9e882009-02-08 23:14:22 +0000147 CleanupBlockInfo(llvm::BasicBlock *cb, llvm::BasicBlock *sb,
Mike Stump99533832009-12-02 07:41:41 +0000148 llvm::BasicBlock *eb, bool ehonly = false)
149 : CleanupBlock(cb), SwitchBlock(sb), EndBlock(eb), EHOnly(ehonly) {}
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000150 };
151
Mike Stumpd88ea562009-12-09 03:35:49 +0000152 /// EHCleanupBlock - RAII object that will create a cleanup block for the
153 /// exceptional edge and set the insert point to that block. When destroyed,
154 /// it creates the cleanup edge and sets the insert point to the previous
155 /// block.
156 class EHCleanupBlock {
157 CodeGenFunction& CGF;
John McCall3d3ec1c2010-04-21 10:05:39 +0000158 llvm::BasicBlock *PreviousInsertionBlock;
Mike Stumpd88ea562009-12-09 03:35:49 +0000159 llvm::BasicBlock *CleanupHandler;
Mike Stumpd88ea562009-12-09 03:35:49 +0000160 llvm::BasicBlock *PreviousInvokeDest;
161 public:
162 EHCleanupBlock(CodeGenFunction &cgf)
John McCall3d3ec1c2010-04-21 10:05:39 +0000163 : CGF(cgf),
164 PreviousInsertionBlock(CGF.Builder.GetInsertBlock()),
165 CleanupHandler(CGF.createBasicBlock("ehcleanup", CGF.CurFn)),
Mike Stumpd88ea562009-12-09 03:35:49 +0000166 PreviousInvokeDest(CGF.getInvokeDest()) {
Mike Stump20d3a532009-12-09 23:49:53 +0000167 llvm::BasicBlock *TerminateHandler = CGF.getTerminateHandler();
John McCall3d3ec1c2010-04-21 10:05:39 +0000168 CGF.Builder.SetInsertPoint(CleanupHandler);
Mike Stump20d3a532009-12-09 23:49:53 +0000169 CGF.setInvokeDest(TerminateHandler);
Mike Stumpd88ea562009-12-09 03:35:49 +0000170 }
171 ~EHCleanupBlock();
172 };
173
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000174 /// PopCleanupBlock - Will pop the cleanup entry on the stack, process all
Mike Stump0dd9e882009-02-08 23:14:22 +0000175 /// branch fixups and return a block info struct with the switch block and end
Mike Stumpd88ea562009-12-09 03:35:49 +0000176 /// block. This will also reset the invoke handler to the previous value
177 /// from when the cleanup block was created.
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000178 CleanupBlockInfo PopCleanupBlock();
Mike Stump0dd9e882009-02-08 23:14:22 +0000179
Mike Stumpf71d2322009-11-30 20:08:49 +0000180 /// DelayedCleanupBlock - RAII object that will create a cleanup block and set
181 /// the insert point to that block. When destructed, it sets the insert point
182 /// to the previous block and pushes a new cleanup entry on the stack.
Douglas Gregord5782d52009-11-24 16:21:10 +0000183 class DelayedCleanupBlock {
Anders Carlsson0d5c6852009-02-07 23:30:41 +0000184 CodeGenFunction& CGF;
185 llvm::BasicBlock *CurBB;
Fariborz Jahanian77996212009-11-04 17:57:40 +0000186 llvm::BasicBlock *CleanupEntryBB;
187 llvm::BasicBlock *CleanupExitBB;
Mike Stumpd88ea562009-12-09 03:35:49 +0000188 llvm::BasicBlock *CurInvokeDest;
Mike Stump99533832009-12-02 07:41:41 +0000189 bool EHOnly;
Fariborz Jahanian77996212009-11-04 17:57:40 +0000190
Anders Carlsson0d5c6852009-02-07 23:30:41 +0000191 public:
Mike Stump99533832009-12-02 07:41:41 +0000192 DelayedCleanupBlock(CodeGenFunction &cgf, bool ehonly = false)
Fariborz Jahanian77996212009-11-04 17:57:40 +0000193 : CGF(cgf), CurBB(CGF.Builder.GetInsertBlock()),
John McCall548ce5e2010-04-21 11:18:06 +0000194 CleanupEntryBB(CGF.createBasicBlock("cleanup")),
195 CleanupExitBB(0),
Mike Stumpd88ea562009-12-09 03:35:49 +0000196 CurInvokeDest(CGF.getInvokeDest()),
197 EHOnly(ehonly) {
Fariborz Jahanian77996212009-11-04 17:57:40 +0000198 CGF.Builder.SetInsertPoint(CleanupEntryBB);
Anders Carlsson0d5c6852009-02-07 23:30:41 +0000199 }
Mike Stump0dd9e882009-02-08 23:14:22 +0000200
Fariborz Jahanian77996212009-11-04 17:57:40 +0000201 llvm::BasicBlock *getCleanupExitBlock() {
202 if (!CleanupExitBB)
203 CleanupExitBB = CGF.createBasicBlock("cleanup.exit");
204 return CleanupExitBB;
205 }
206
Douglas Gregord5782d52009-11-24 16:21:10 +0000207 ~DelayedCleanupBlock() {
Mike Stumpd88ea562009-12-09 03:35:49 +0000208 CGF.PushCleanupBlock(CleanupEntryBB, CleanupExitBB, CurInvokeDest,
209 EHOnly);
Daniel Dunbard286f052009-07-19 06:58:07 +0000210 // FIXME: This is silly, move this into the builder.
211 if (CurBB)
212 CGF.Builder.SetInsertPoint(CurBB);
213 else
214 CGF.Builder.ClearInsertionPoint();
Anders Carlsson0d5c6852009-02-07 23:30:41 +0000215 }
216 };
217
Douglas Gregor01234bb2009-11-24 16:43:22 +0000218 /// \brief Enters a new scope for capturing cleanups, all of which will be
219 /// executed once the scope is exited.
220 class CleanupScope {
221 CodeGenFunction& CGF;
222 size_t CleanupStackDepth;
223 bool OldDidCallStackSave;
Douglas Gregor5656e142009-11-24 21:15:44 +0000224 bool PerformCleanup;
Douglas Gregor01234bb2009-11-24 16:43:22 +0000225
226 CleanupScope(const CleanupScope &); // DO NOT IMPLEMENT
227 CleanupScope &operator=(const CleanupScope &); // DO NOT IMPLEMENT
228
229 public:
230 /// \brief Enter a new cleanup scope.
Douglas Gregor5656e142009-11-24 21:15:44 +0000231 explicit CleanupScope(CodeGenFunction &CGF)
232 : CGF(CGF), PerformCleanup(true)
233 {
Douglas Gregor01234bb2009-11-24 16:43:22 +0000234 CleanupStackDepth = CGF.CleanupEntries.size();
235 OldDidCallStackSave = CGF.DidCallStackSave;
236 }
237
238 /// \brief Exit this cleanup scope, emitting any accumulated
239 /// cleanups.
240 ~CleanupScope() {
Douglas Gregor5656e142009-11-24 21:15:44 +0000241 if (PerformCleanup) {
242 CGF.DidCallStackSave = OldDidCallStackSave;
243 CGF.EmitCleanupBlocks(CleanupStackDepth);
244 }
245 }
246
247 /// \brief Determine whether this scope requires any cleanups.
248 bool requiresCleanups() const {
249 return CGF.CleanupEntries.size() > CleanupStackDepth;
250 }
251
252 /// \brief Force the emission of cleanups now, instead of waiting
253 /// until this object is destroyed.
254 void ForceCleanup() {
255 assert(PerformCleanup && "Already forced cleanup");
Douglas Gregor01234bb2009-11-24 16:43:22 +0000256 CGF.DidCallStackSave = OldDidCallStackSave;
257 CGF.EmitCleanupBlocks(CleanupStackDepth);
Douglas Gregor5656e142009-11-24 21:15:44 +0000258 PerformCleanup = false;
Douglas Gregor01234bb2009-11-24 16:43:22 +0000259 }
260 };
261
Anders Carlsson44ec82b2010-03-30 03:14:41 +0000262 /// CXXTemporariesCleanupScope - Enters a new scope for catching live
263 /// temporaries, all of which will be popped once the scope is exited.
264 class CXXTemporariesCleanupScope {
265 CodeGenFunction &CGF;
266 size_t NumLiveTemporaries;
267
268 // DO NOT IMPLEMENT
269 CXXTemporariesCleanupScope(const CXXTemporariesCleanupScope &);
270 CXXTemporariesCleanupScope &operator=(const CXXTemporariesCleanupScope &);
271
272 public:
273 explicit CXXTemporariesCleanupScope(CodeGenFunction &CGF)
274 : CGF(CGF), NumLiveTemporaries(CGF.LiveTemporaries.size()) { }
275
276 ~CXXTemporariesCleanupScope() {
277 while (CGF.LiveTemporaries.size() > NumLiveTemporaries)
278 CGF.PopCXXTemporary();
279 }
280 };
281
282
Anders Carlssonc71c8452009-02-07 23:50:39 +0000283 /// EmitCleanupBlocks - Takes the old cleanup stack size and emits the cleanup
284 /// blocks that have been added.
285 void EmitCleanupBlocks(size_t OldCleanupStackSize);
286
Anders Carlsson87eaf172009-02-08 00:50:42 +0000287 /// EmitBranchThroughCleanup - Emit a branch from the current insert block
288 /// through the cleanup handling code (if any) and then on to \arg Dest.
289 ///
Mike Stump0dd9e882009-02-08 23:14:22 +0000290 /// FIXME: Maybe this should really be in EmitBranch? Don't we always want
Anders Carlsson87eaf172009-02-08 00:50:42 +0000291 /// this behavior for branches?
292 void EmitBranchThroughCleanup(llvm::BasicBlock *Dest);
Mike Stump0dd9e882009-02-08 23:14:22 +0000293
Anders Carlsson72119a82010-02-04 17:18:07 +0000294 /// BeginConditionalBranch - Should be called before a conditional part of an
Anders Carlssona36bf8f2009-11-20 17:27:56 +0000295 /// expression is emitted. For example, before the RHS of the expression below
296 /// is emitted:
Mike Stump1eb44332009-09-09 15:08:12 +0000297 ///
Anders Carlsson1d847502009-06-04 02:22:12 +0000298 /// b && f(T());
299 ///
Anders Carlssona36bf8f2009-11-20 17:27:56 +0000300 /// This is used to make sure that any temporaries created in the conditional
Anders Carlsson1d847502009-06-04 02:22:12 +0000301 /// branch are only destroyed if the branch is taken.
Anders Carlsson72119a82010-02-04 17:18:07 +0000302 void BeginConditionalBranch() {
Anders Carlssona36bf8f2009-11-20 17:27:56 +0000303 ++ConditionalBranchLevel;
304 }
Mike Stump1eb44332009-09-09 15:08:12 +0000305
Anders Carlsson72119a82010-02-04 17:18:07 +0000306 /// EndConditionalBranch - Should be called after a conditional part of an
Anders Carlssona36bf8f2009-11-20 17:27:56 +0000307 /// expression has been emitted.
Anders Carlsson72119a82010-02-04 17:18:07 +0000308 void EndConditionalBranch() {
Anders Carlsson08e9e452010-01-24 00:20:05 +0000309 assert(ConditionalBranchLevel != 0 &&
310 "Conditional branch mismatch!");
311
Anders Carlssona36bf8f2009-11-20 17:27:56 +0000312 --ConditionalBranchLevel;
313 }
Mike Stump1eb44332009-09-09 15:08:12 +0000314
Chris Lattner7f02f722007-08-24 05:35:26 +0000315private:
Chris Lattnerd9becd12009-10-28 23:59:40 +0000316 CGDebugInfo *DebugInfo;
Mike Stump09429b92009-02-17 17:00:02 +0000317
Mike Stumpf71d2322009-11-30 20:08:49 +0000318 /// IndirectBranch - The first time an indirect goto is seen we create a block
319 /// with an indirect branch. Every time we see the address of a label taken,
320 /// we add the label to the indirect goto. Every subsequent indirect goto is
321 /// codegen'd as a jump to the IndirectBranch's basic block.
Chris Lattnerd9becd12009-10-28 23:59:40 +0000322 llvm::IndirectBrInst *IndirectBranch;
Daniel Dunbar0ffb1252008-08-04 16:51:22 +0000323
Mike Stump0dd9e882009-02-08 23:14:22 +0000324 /// LocalDeclMap - This keeps track of the LLVM allocas or globals for local C
325 /// decls.
Reid Spencer5f016e22007-07-11 17:01:13 +0000326 llvm::DenseMap<const Decl*, llvm::Value*> LocalDeclMap;
327
328 /// LabelMap - This keeps track of the LLVM basic block for each C label.
329 llvm::DenseMap<const LabelStmt*, llvm::BasicBlock*> LabelMap;
Mike Stump0dd9e882009-02-08 23:14:22 +0000330
Mike Stump0dd9e882009-02-08 23:14:22 +0000331 // BreakContinueStack - This keeps track of where break and continue
Anders Carlssone4b6d342009-02-10 05:52:02 +0000332 // statements should jump to.
Chris Lattnerda138702007-07-16 21:28:45 +0000333 struct BreakContinue {
Anders Carlssone4b6d342009-02-10 05:52:02 +0000334 BreakContinue(llvm::BasicBlock *bb, llvm::BasicBlock *cb)
335 : BreakBlock(bb), ContinueBlock(cb) {}
Mike Stump0dd9e882009-02-08 23:14:22 +0000336
Chris Lattnerda138702007-07-16 21:28:45 +0000337 llvm::BasicBlock *BreakBlock;
338 llvm::BasicBlock *ContinueBlock;
Mike Stump0dd9e882009-02-08 23:14:22 +0000339 };
Chris Lattnerda138702007-07-16 21:28:45 +0000340 llvm::SmallVector<BreakContinue, 8> BreakContinueStack;
Daniel Dunbar18ccc772008-09-28 01:03:14 +0000341
Mike Stump0dd9e882009-02-08 23:14:22 +0000342 /// SwitchInsn - This is nearest current switch instruction. It is null if if
343 /// current context is not in a switch.
Devang Patel51b09f22007-10-04 23:45:31 +0000344 llvm::SwitchInst *SwitchInsn;
345
Mike Stump0dd9e882009-02-08 23:14:22 +0000346 /// CaseRangeBlock - This block holds if condition check for last case
Devang Patel80fd5f92007-10-09 17:08:50 +0000347 /// statement range in current switch instruction.
Devang Patelc049e4f2007-10-08 20:57:48 +0000348 llvm::BasicBlock *CaseRangeBlock;
349
Daniel Dunbar9834ffb2009-02-23 17:26:39 +0000350 /// InvokeDest - This is the nearest exception target for calls
351 /// which can unwind, when exceptions are being used.
352 llvm::BasicBlock *InvokeDest;
353
Mike Stump0dd9e882009-02-08 23:14:22 +0000354 // VLASizeMap - This keeps track of the associated size for each VLA type.
Eli Friedmanbbed6b92009-08-15 02:50:32 +0000355 // We track this by the size expression rather than the type itself because
356 // in certain situations, like a const qualifier applied to an VLA typedef,
357 // multiple VLA types can share the same size expression.
Mike Stump0dd9e882009-02-08 23:14:22 +0000358 // FIXME: Maybe this could be a stack of maps that is pushed/popped as we
359 // enter/leave scopes.
Eli Friedmanbbed6b92009-08-15 02:50:32 +0000360 llvm::DenseMap<const Expr*, llvm::Value*> VLASizeMap;
Mike Stump0dd9e882009-02-08 23:14:22 +0000361
Anders Carlsson4cc1a472009-02-09 20:20:56 +0000362 /// DidCallStackSave - Whether llvm.stacksave has been called. Used to avoid
363 /// calling llvm.stacksave for multiple VLAs in the same scope.
364 bool DidCallStackSave;
Mike Stump09429b92009-02-17 17:00:02 +0000365
Anders Carlsson6ccc4762009-02-07 22:53:43 +0000366 struct CleanupEntry {
Fariborz Jahanian77996212009-11-04 17:57:40 +0000367 /// CleanupEntryBlock - The block of code that does the actual cleanup.
368 llvm::BasicBlock *CleanupEntryBlock;
Mike Stump0dd9e882009-02-08 23:14:22 +0000369
Fariborz Jahanian77996212009-11-04 17:57:40 +0000370 /// CleanupExitBlock - The cleanup exit block.
371 llvm::BasicBlock *CleanupExitBlock;
372
Anders Carlsson6ccc4762009-02-07 22:53:43 +0000373 /// Blocks - Basic blocks that were emitted in the current cleanup scope.
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000374 std::vector<llvm::BasicBlock *> Blocks;
Anders Carlsson6ccc4762009-02-07 22:53:43 +0000375
376 /// BranchFixups - Branch instructions to basic blocks that haven't been
377 /// inserted into the current function yet.
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000378 std::vector<llvm::BranchInst *> BranchFixups;
Anders Carlsson6ccc4762009-02-07 22:53:43 +0000379
Mike Stumpd88ea562009-12-09 03:35:49 +0000380 /// PreviousInvokeDest - The invoke handler from the start of the cleanup
381 /// region.
382 llvm::BasicBlock *PreviousInvokeDest;
383
Mike Stump99533832009-12-02 07:41:41 +0000384 /// EHOnly - Perform this only on the exceptional edge, not the main edge.
385 bool EHOnly;
386
Fariborz Jahanian77996212009-11-04 17:57:40 +0000387 explicit CleanupEntry(llvm::BasicBlock *CleanupEntryBlock,
Mike Stumpd88ea562009-12-09 03:35:49 +0000388 llvm::BasicBlock *CleanupExitBlock,
389 llvm::BasicBlock *PreviousInvokeDest,
390 bool ehonly)
391 : CleanupEntryBlock(CleanupEntryBlock),
Mike Stump99533832009-12-02 07:41:41 +0000392 CleanupExitBlock(CleanupExitBlock),
Mike Stumpd88ea562009-12-09 03:35:49 +0000393 PreviousInvokeDest(PreviousInvokeDest),
Mike Stump99533832009-12-02 07:41:41 +0000394 EHOnly(ehonly) {}
Anders Carlsson6ccc4762009-02-07 22:53:43 +0000395 };
Mike Stump0dd9e882009-02-08 23:14:22 +0000396
Anders Carlsson6ccc4762009-02-07 22:53:43 +0000397 /// CleanupEntries - Stack of cleanup entries.
398 llvm::SmallVector<CleanupEntry, 8> CleanupEntries;
399
Anders Carlssonbd6fa3d2009-02-08 00:16:35 +0000400 typedef llvm::DenseMap<llvm::BasicBlock*, size_t> BlockScopeMap;
401
402 /// BlockScopes - Map of which "cleanup scope" scope basic blocks have.
403 BlockScopeMap BlockScopes;
Mike Stump0dd9e882009-02-08 23:14:22 +0000404
Anders Carlssonf6c56e22009-11-25 03:15:49 +0000405 /// CXXThisDecl - When generating code for a C++ member function,
406 /// this will hold the implicit 'this' declaration.
Anders Carlsson2b77ba82009-04-04 20:47:02 +0000407 ImplicitParamDecl *CXXThisDecl;
John McCall25049412010-02-16 22:04:33 +0000408 llvm::Value *CXXThisValue;
Mike Stump1eb44332009-09-09 15:08:12 +0000409
Anders Carlssonf6c56e22009-11-25 03:15:49 +0000410 /// CXXVTTDecl - When generating code for a base object constructor or
411 /// base object destructor with virtual bases, this will hold the implicit
412 /// VTT parameter.
413 ImplicitParamDecl *CXXVTTDecl;
John McCall25049412010-02-16 22:04:33 +0000414 llvm::Value *CXXVTTValue;
Anders Carlssonf6c56e22009-11-25 03:15:49 +0000415
Anders Carlssone8b55782009-06-03 18:54:26 +0000416 /// CXXLiveTemporaryInfo - Holds information about a live C++ temporary.
417 struct CXXLiveTemporaryInfo {
418 /// Temporary - The live temporary.
419 const CXXTemporary *Temporary;
Mike Stump1eb44332009-09-09 15:08:12 +0000420
Anders Carlssone8b55782009-06-03 18:54:26 +0000421 /// ThisPtr - The pointer to the temporary.
422 llvm::Value *ThisPtr;
Mike Stump1eb44332009-09-09 15:08:12 +0000423
Anders Carlssone8b55782009-06-03 18:54:26 +0000424 /// DtorBlock - The destructor block.
425 llvm::BasicBlock *DtorBlock;
Mike Stump1eb44332009-09-09 15:08:12 +0000426
Mike Stumpf71d2322009-11-30 20:08:49 +0000427 /// CondPtr - If this is a conditional temporary, this is the pointer to the
428 /// condition variable that states whether the destructor should be called
429 /// or not.
Anders Carlssone8b55782009-06-03 18:54:26 +0000430 llvm::Value *CondPtr;
Mike Stump1eb44332009-09-09 15:08:12 +0000431
Anders Carlssone8b55782009-06-03 18:54:26 +0000432 CXXLiveTemporaryInfo(const CXXTemporary *temporary,
Anders Carlssonf4b8fea2009-06-03 19:05:16 +0000433 llvm::Value *thisptr, llvm::BasicBlock *dtorblock,
434 llvm::Value *condptr)
Mike Stump1eb44332009-09-09 15:08:12 +0000435 : Temporary(temporary), ThisPtr(thisptr), DtorBlock(dtorblock),
Anders Carlssone8b55782009-06-03 18:54:26 +0000436 CondPtr(condptr) { }
437 };
Mike Stump1eb44332009-09-09 15:08:12 +0000438
Anders Carlssone8b55782009-06-03 18:54:26 +0000439 llvm::SmallVector<CXXLiveTemporaryInfo, 4> LiveTemporaries;
Anders Carlsson1d847502009-06-04 02:22:12 +0000440
Anders Carlssona36bf8f2009-11-20 17:27:56 +0000441 /// ConditionalBranchLevel - Contains the nesting level of the current
442 /// conditional branch. This is used so that we know if a temporary should be
443 /// destroyed conditionally.
444 unsigned ConditionalBranchLevel;
Mike Stump1eb44332009-09-09 15:08:12 +0000445
Anders Carlsson7dfa4072009-09-12 02:14:24 +0000446
447 /// ByrefValueInfoMap - For each __block variable, contains a pair of the LLVM
448 /// type as well as the field number that contains the actual data.
449 llvm::DenseMap<const ValueDecl *, std::pair<const llvm::Type *,
450 unsigned> > ByRefValueInfo;
451
452 /// getByrefValueFieldNumber - Given a declaration, returns the LLVM field
453 /// number that holds the value.
454 unsigned getByRefValueLLVMField(const ValueDecl *VD) const;
Mike Stump182f3832009-12-10 00:02:42 +0000455
456 llvm::BasicBlock *TerminateHandler;
Mike Stump15037ca2009-12-15 00:35:12 +0000457 llvm::BasicBlock *TrapBB;
Eli Friedman94067052009-12-10 02:21:21 +0000458
Reid Spencer5f016e22007-07-11 17:01:13 +0000459public:
460 CodeGenFunction(CodeGenModule &cgm);
Mike Stump0dd9e882009-02-08 23:14:22 +0000461
Reid Spencer5f016e22007-07-11 17:01:13 +0000462 ASTContext &getContext() const;
Anders Carlssone896d982009-02-13 08:11:52 +0000463 CGDebugInfo *getDebugInfo() { return DebugInfo; }
Reid Spencer5f016e22007-07-11 17:01:13 +0000464
Daniel Dunbar9834ffb2009-02-23 17:26:39 +0000465 llvm::BasicBlock *getInvokeDest() { return InvokeDest; }
466 void setInvokeDest(llvm::BasicBlock *B) { InvokeDest = B; }
467
Owen Andersona1cf15f2009-07-14 23:10:40 +0000468 llvm::LLVMContext &getLLVMContext() { return VMContext; }
Owen Anderson69243822009-07-13 04:10:07 +0000469
Daniel Dunbar9834ffb2009-02-23 17:26:39 +0000470 //===--------------------------------------------------------------------===//
471 // Objective-C
472 //===--------------------------------------------------------------------===//
473
Chris Lattner391d77a2008-03-30 23:03:07 +0000474 void GenerateObjCMethod(const ObjCMethodDecl *OMD);
Daniel Dunbaraf05bb92008-08-26 08:29:31 +0000475
Mike Stump0dd9e882009-02-08 23:14:22 +0000476 void StartObjCMethod(const ObjCMethodDecl *MD,
Fariborz Jahanian679a5022009-01-10 21:06:09 +0000477 const ObjCContainerDecl *CD);
Daniel Dunbaraf05bb92008-08-26 08:29:31 +0000478
Mike Stump0dd9e882009-02-08 23:14:22 +0000479 /// GenerateObjCGetter - Synthesize an Objective-C property getter function.
Fariborz Jahanianfef30b52008-12-09 20:23:04 +0000480 void GenerateObjCGetter(ObjCImplementationDecl *IMP,
481 const ObjCPropertyImplDecl *PID);
Fariborz Jahanian109dfc62010-04-28 21:28:56 +0000482 void GenerateObjCCtorDtorMethod(ObjCImplementationDecl *IMP,
483 ObjCMethodDecl *MD, bool ctor);
Daniel Dunbaraf05bb92008-08-26 08:29:31 +0000484
Mike Stump0dd9e882009-02-08 23:14:22 +0000485 /// GenerateObjCSetter - Synthesize an Objective-C property setter function
486 /// for the given property.
Fariborz Jahanianfef30b52008-12-09 20:23:04 +0000487 void GenerateObjCSetter(ObjCImplementationDecl *IMP,
488 const ObjCPropertyImplDecl *PID);
Fariborz Jahanian0b2bd472010-04-13 00:38:05 +0000489 bool IndirectObjCSetterArg(const CGFunctionInfo &FI);
Fariborz Jahanian15bd5882010-04-13 18:32:24 +0000490 bool IvarTypeWithAggrGCObjects(QualType Ty);
Daniel Dunbaraf05bb92008-08-26 08:29:31 +0000491
Mike Stump4e7a1f72009-02-21 20:00:35 +0000492 //===--------------------------------------------------------------------===//
493 // Block Bits
494 //===--------------------------------------------------------------------===//
495
Mike Stump8a2b4b12009-02-25 23:33:13 +0000496 llvm::Value *BuildBlockLiteralTmp(const BlockExpr *);
Blaine Garst2a7eb282010-02-23 21:51:17 +0000497 llvm::Constant *BuildDescriptorBlockDecl(const BlockExpr *,
498 bool BlockHasCopyDispose,
Ken Dyck199c3d62010-01-11 17:06:35 +0000499 CharUnits Size,
Mike Stump08920992009-03-07 02:35:30 +0000500 const llvm::StructType *,
501 std::vector<HelperInfo> *);
Mike Stump4e7a1f72009-02-21 20:00:35 +0000502
Chris Lattner161d36d2009-02-28 19:01:03 +0000503 llvm::Function *GenerateBlockFunction(const BlockExpr *BExpr,
John McCallee504292010-05-21 04:11:14 +0000504 CGBlockInfo &Info,
Mike Stump6cc88f72009-03-20 21:53:12 +0000505 const Decl *OuterFuncDecl,
John McCallee504292010-05-21 04:11:14 +0000506 llvm::DenseMap<const Decl*, llvm::Value*> ldm);
Mike Stump4e7a1f72009-02-21 20:00:35 +0000507
508 llvm::Value *LoadBlockStruct();
509
John McCallea1471e2010-05-20 01:18:31 +0000510 void AllocateBlockCXXThisPointer(const CXXThisExpr *E);
511 void AllocateBlockDecl(const BlockDeclRefExpr *E);
John McCallee504292010-05-21 04:11:14 +0000512 llvm::Value *GetAddrOfBlockDecl(const BlockDeclRefExpr *E) {
513 return GetAddrOfBlockDecl(E->getDecl(), E->isByRef());
514 }
515 llvm::Value *GetAddrOfBlockDecl(const ValueDecl *D, bool ByRef);
Anders Carlsson9ad55132009-09-09 02:51:03 +0000516 const llvm::Type *BuildByRefType(const ValueDecl *D);
Mike Stumpdab514f2009-03-04 03:23:46 +0000517
Anders Carlsson0ff8baf2009-09-11 00:07:24 +0000518 void GenerateCode(GlobalDecl GD, llvm::Function *Fn);
519 void StartFunction(GlobalDecl GD, QualType RetTy,
Daniel Dunbar7c086512008-09-09 23:14:03 +0000520 llvm::Function *Fn,
Daniel Dunbar2284ac92008-10-18 18:22:23 +0000521 const FunctionArgList &Args,
522 SourceLocation StartLoc);
Daniel Dunbara448fb22008-11-11 23:11:34 +0000523
John McCall9fc6a772010-02-19 09:25:03 +0000524 void EmitConstructorBody(FunctionArgList &Args);
525 void EmitDestructorBody(FunctionArgList &Args);
526 void EmitFunctionBody(FunctionArgList &Args);
John McCalla355e072010-02-18 03:17:58 +0000527
Mike Stump0dd9e882009-02-08 23:14:22 +0000528 /// EmitReturnBlock - Emit the unified return block, trying to avoid its
529 /// emission when possible.
Daniel Dunbar1c1d6072009-01-26 23:27:52 +0000530 void EmitReturnBlock();
531
Mike Stump0dd9e882009-02-08 23:14:22 +0000532 /// FinishFunction - Complete IR generation of the current function. It is
533 /// legal to call this function even if there is no current insertion point.
Daniel Dunbaraf05bb92008-08-26 08:29:31 +0000534 void FinishFunction(SourceLocation EndLoc=SourceLocation());
Daniel Dunbar17b708d2008-09-09 23:27:19 +0000535
Anders Carlsson519c3282010-03-24 00:39:18 +0000536 /// GenerateThunk - Generate a thunk for the given method.
537 void GenerateThunk(llvm::Function *Fn, GlobalDecl GD, const ThunkInfo &Thunk);
538
Douglas Gregorfb8cc252010-05-05 05:51:00 +0000539 void EmitCtorPrologue(const CXXConstructorDecl *CD, CXXCtorType Type,
540 FunctionArgList &Args);
Mike Stump1eb44332009-09-09 15:08:12 +0000541
Anders Carlssond103f9f2010-03-28 19:40:00 +0000542 /// InitializeVTablePointer - Initialize the vtable pointer of the given
543 /// subobject.
544 ///
Anders Carlssonb3b772e2010-04-20 05:22:15 +0000545 void InitializeVTablePointer(BaseSubobject Base,
546 const CXXRecordDecl *NearestVBase,
Anders Carlsson42358402010-05-03 00:07:07 +0000547 uint64_t OffsetFromNearestVBase,
Anders Carlssond103f9f2010-03-28 19:40:00 +0000548 llvm::Constant *VTable,
549 const CXXRecordDecl *VTableClass);
550
551 typedef llvm::SmallPtrSet<const CXXRecordDecl *, 4> VisitedVirtualBasesSetTy;
Anders Carlssonb3b772e2010-04-20 05:22:15 +0000552 void InitializeVTablePointers(BaseSubobject Base,
553 const CXXRecordDecl *NearestVBase,
Anders Carlsson42358402010-05-03 00:07:07 +0000554 uint64_t OffsetFromNearestVBase,
Anders Carlsson603d6d12010-03-28 21:07:49 +0000555 bool BaseIsNonVirtualPrimaryBase,
556 llvm::Constant *VTable,
557 const CXXRecordDecl *VTableClass,
558 VisitedVirtualBasesSetTy& VBases);
Eli Friedman77a259c2009-12-08 06:46:18 +0000559
Anders Carlsson603d6d12010-03-28 21:07:49 +0000560 void InitializeVTablePointers(const CXXRecordDecl *ClassDecl);
Anders Carlssond103f9f2010-03-28 19:40:00 +0000561
562
Fariborz Jahanian426cc382009-07-30 17:49:11 +0000563 /// EmitDtorEpilogue - Emit all code that comes at the end of class's
Mike Stumpf71d2322009-11-30 20:08:49 +0000564 /// destructor. This is to call destructors on members and base classes in
565 /// reverse order of their construction.
Anders Carlssonde1d26b2009-09-14 05:32:02 +0000566 void EmitDtorEpilogue(const CXXDestructorDecl *Dtor,
567 CXXDtorType Type);
Mike Stump1eb44332009-09-09 15:08:12 +0000568
Mike Stump0dd9e882009-02-08 23:14:22 +0000569 /// EmitFunctionProlog - Emit the target specific LLVM code to load the
570 /// arguments for the given function. This is also responsible for naming the
571 /// LLVM function arguments.
Daniel Dunbar88b53962009-02-02 22:03:45 +0000572 void EmitFunctionProlog(const CGFunctionInfo &FI,
573 llvm::Function *Fn,
Daniel Dunbar17b708d2008-09-09 23:27:19 +0000574 const FunctionArgList &Args);
575
Mike Stump0dd9e882009-02-08 23:14:22 +0000576 /// EmitFunctionEpilog - Emit the target specific LLVM code to return the
577 /// given temporary.
Daniel Dunbar88b53962009-02-02 22:03:45 +0000578 void EmitFunctionEpilog(const CGFunctionInfo &FI, llvm::Value *ReturnValue);
Daniel Dunbar17b708d2008-09-09 23:27:19 +0000579
Mike Stumpcce3d4f2009-12-07 23:38:24 +0000580 /// EmitStartEHSpec - Emit the start of the exception spec.
581 void EmitStartEHSpec(const Decl *D);
582
583 /// EmitEndEHSpec - Emit the end of the exception spec.
584 void EmitEndEHSpec(const Decl *D);
585
Mike Stump182f3832009-12-10 00:02:42 +0000586 /// getTerminateHandler - Return a handler that just calls terminate.
Mike Stump9b39c512009-12-09 22:59:31 +0000587 llvm::BasicBlock *getTerminateHandler();
588
Daniel Dunbar8b1a3432009-02-03 23:03:55 +0000589 const llvm::Type *ConvertTypeForMem(QualType T);
Reid Spencer5f016e22007-07-11 17:01:13 +0000590 const llvm::Type *ConvertType(QualType T);
John McCallbff225e2010-02-16 04:15:37 +0000591 const llvm::Type *ConvertType(const TypeDecl *T) {
592 return ConvertType(getContext().getTypeDeclType(T));
593 }
Chris Lattnerc8aa5f12008-04-04 04:07:35 +0000594
Mike Stump0dd9e882009-02-08 23:14:22 +0000595 /// LoadObjCSelf - Load the value of self. This function is only valid while
596 /// generating code for an Objective-C method.
Chris Lattnerc8aa5f12008-04-04 04:07:35 +0000597 llvm::Value *LoadObjCSelf();
Mike Stump0dd9e882009-02-08 23:14:22 +0000598
599 /// TypeOfSelfObject - Return type of object that this self represents.
Fariborz Jahanian45012a72009-02-03 00:09:52 +0000600 QualType TypeOfSelfObject();
Chris Lattner41110242008-06-17 18:05:57 +0000601
Reid Spencer5f016e22007-07-11 17:01:13 +0000602 /// hasAggregateLLVMType - Return true if the specified AST type will map into
603 /// an aggregate LLVM type or is void.
604 static bool hasAggregateLLVMType(QualType T);
Daniel Dunbar55e87422008-11-11 02:29:29 +0000605
606 /// createBasicBlock - Create an LLVM basic block.
Mike Stump0dd9e882009-02-08 23:14:22 +0000607 llvm::BasicBlock *createBasicBlock(const char *Name="",
Daniel Dunbar55e87422008-11-11 02:29:29 +0000608 llvm::Function *Parent=0,
609 llvm::BasicBlock *InsertBefore=0) {
Daniel Dunbar29ea6722008-11-12 00:01:12 +0000610#ifdef NDEBUG
Owen Anderson0032b272009-08-13 21:57:51 +0000611 return llvm::BasicBlock::Create(VMContext, "", Parent, InsertBefore);
Daniel Dunbar29ea6722008-11-12 00:01:12 +0000612#else
Owen Anderson0032b272009-08-13 21:57:51 +0000613 return llvm::BasicBlock::Create(VMContext, Name, Parent, InsertBefore);
Daniel Dunbar29ea6722008-11-12 00:01:12 +0000614#endif
Daniel Dunbar55e87422008-11-11 02:29:29 +0000615 }
Mike Stump0dd9e882009-02-08 23:14:22 +0000616
Reid Spencer5f016e22007-07-11 17:01:13 +0000617 /// getBasicBlockForLabel - Return the LLVM basicblock that the specified
618 /// label maps to.
619 llvm::BasicBlock *getBasicBlockForLabel(const LabelStmt *S);
Mike Stump0dd9e882009-02-08 23:14:22 +0000620
Mike Stumpf71d2322009-11-30 20:08:49 +0000621 /// SimplifyForwardingBlocks - If the given basic block is only a branch to
622 /// another basic block, simplify it. This assumes that no other code could
623 /// potentially reference the basic block.
Daniel Dunbaraa5bd872009-04-01 04:37:47 +0000624 void SimplifyForwardingBlocks(llvm::BasicBlock *BB);
625
Mike Stump0dd9e882009-02-08 23:14:22 +0000626 /// EmitBlock - Emit the given block \arg BB and set it as the insert point,
627 /// adding a fall-through branch from the current insert block if
628 /// necessary. It is legal to call this function even if there is no current
629 /// insertion point.
Daniel Dunbara0c21a82008-11-13 01:24:05 +0000630 ///
Mike Stump0dd9e882009-02-08 23:14:22 +0000631 /// IsFinished - If true, indicates that the caller has finished emitting
632 /// branches to the given block and does not expect to emit code into it. This
633 /// means the block can be ignored if it is unreachable.
Daniel Dunbara0c21a82008-11-13 01:24:05 +0000634 void EmitBlock(llvm::BasicBlock *BB, bool IsFinished=false);
Daniel Dunbar824e3bd2008-11-11 04:34:23 +0000635
Mike Stump0dd9e882009-02-08 23:14:22 +0000636 /// EmitBranch - Emit a branch to the specified basic block from the current
637 /// insert block, taking care to avoid creation of branches from dummy
638 /// blocks. It is legal to call this function even if there is no current
639 /// insertion point.
Daniel Dunbar5e08ad32008-11-11 22:06:59 +0000640 ///
Mike Stump0dd9e882009-02-08 23:14:22 +0000641 /// This function clears the current insertion point. The caller should follow
642 /// calls to this function with calls to Emit*Block prior to generation new
643 /// code.
Daniel Dunbard57a8712008-11-11 09:41:28 +0000644 void EmitBranch(llvm::BasicBlock *Block);
645
Mike Stump0dd9e882009-02-08 23:14:22 +0000646 /// HaveInsertPoint - True if an insertion point is defined. If not, this
647 /// indicates that the current code being emitted is unreachable.
648 bool HaveInsertPoint() const {
Daniel Dunbara448fb22008-11-11 23:11:34 +0000649 return Builder.GetInsertBlock() != 0;
650 }
651
Mike Stump0dd9e882009-02-08 23:14:22 +0000652 /// EnsureInsertPoint - Ensure that an insertion point is defined so that
653 /// emitted IR has a place to go. Note that by definition, if this function
654 /// creates a block then that block is unreachable; callers may do better to
655 /// detect when no insertion point is defined and simply skip IR generation.
Daniel Dunbara448fb22008-11-11 23:11:34 +0000656 void EnsureInsertPoint() {
657 if (!HaveInsertPoint())
658 EmitBlock(createBasicBlock());
659 }
Mike Stump0dd9e882009-02-08 23:14:22 +0000660
Daniel Dunbar488e9932008-08-16 00:56:44 +0000661 /// ErrorUnsupported - Print out an error that codegen doesn't support the
Chris Lattnerdc5e8262007-12-02 01:43:38 +0000662 /// specified stmt yet.
Daniel Dunbar90df4b62008-09-04 03:43:08 +0000663 void ErrorUnsupported(const Stmt *S, const char *Type,
664 bool OmitOnError=false);
Reid Spencer5f016e22007-07-11 17:01:13 +0000665
666 //===--------------------------------------------------------------------===//
667 // Helpers
668 //===--------------------------------------------------------------------===//
Mike Stump0dd9e882009-02-08 23:14:22 +0000669
John McCall0953e762009-09-24 19:53:00 +0000670 Qualifiers MakeQualifiers(QualType T) {
Mike Stumpdf317bf2009-11-03 23:25:48 +0000671 Qualifiers Quals = getContext().getCanonicalType(T).getQualifiers();
John McCall0953e762009-09-24 19:53:00 +0000672 Quals.setObjCGCAttr(getContext().getObjCGCAttrKind(T));
673 return Quals;
674 }
675
Reid Spencer5f016e22007-07-11 17:01:13 +0000676 /// CreateTempAlloca - This creates a alloca and inserts it into the entry
Daniel Dunbar195337d2010-02-09 02:48:28 +0000677 /// block. The caller is responsible for setting an appropriate alignment on
678 /// the alloca.
Reid Spencer5f016e22007-07-11 17:01:13 +0000679 llvm::AllocaInst *CreateTempAlloca(const llvm::Type *Ty,
Daniel Dunbar259e9cc2009-10-19 01:21:05 +0000680 const llvm::Twine &Name = "tmp");
Mike Stump0dd9e882009-02-08 23:14:22 +0000681
John McCallac418162010-04-22 01:10:34 +0000682 /// InitTempAlloca - Provide an initial value for the given alloca.
683 void InitTempAlloca(llvm::AllocaInst *Alloca, llvm::Value *Value);
684
Daniel Dunbar9bd4da22010-02-16 19:44:13 +0000685 /// CreateIRTemp - Create a temporary IR object of the given type, with
686 /// appropriate alignment. This routine should only be used when an temporary
687 /// value needs to be stored into an alloca (for example, to avoid explicit
688 /// PHI construction), but the type is the IR type, not the type appropriate
689 /// for storing in memory.
690 llvm::Value *CreateIRTemp(QualType T, const llvm::Twine &Name = "tmp");
691
Daniel Dunbar195337d2010-02-09 02:48:28 +0000692 /// CreateMemTemp - Create a temporary memory object of the given type, with
693 /// appropriate alignment.
694 llvm::Value *CreateMemTemp(QualType T, const llvm::Twine &Name = "tmp");
695
Reid Spencer5f016e22007-07-11 17:01:13 +0000696 /// EvaluateExprAsBool - Perform the usual unary conversions on the specified
697 /// expression and compare the result against zero, returning an Int1Ty value.
698 llvm::Value *EvaluateExprAsBool(const Expr *E);
699
Chris Lattner9b655512007-08-31 22:49:20 +0000700 /// EmitAnyExpr - Emit code to compute the specified expression which can have
701 /// any type. The result is returned as an RValue struct. If this is an
702 /// aggregate expression, the aggloc/agglocvolatile arguments indicate where
703 /// the result should be returned.
Mike Stump49d1cd52009-05-26 22:03:21 +0000704 ///
705 /// \param IgnoreResult - True if the resulting value isn't used.
Mike Stump0dd9e882009-02-08 23:14:22 +0000706 RValue EmitAnyExpr(const Expr *E, llvm::Value *AggLoc = 0,
Anders Carlsson14c5cbf2009-08-16 07:36:22 +0000707 bool IsAggLocVolatile = false, bool IgnoreResult = false,
708 bool IsInitializer = false);
Devang Pateld9363c32007-09-28 21:49:18 +0000709
Mike Stump0dd9e882009-02-08 23:14:22 +0000710 // EmitVAListRef - Emit a "reference" to a va_list; this is either the address
711 // or the value of the expression, depending on how va_list is defined.
Eli Friedman4fd0aa52009-01-20 17:46:04 +0000712 llvm::Value *EmitVAListRef(const Expr *E);
713
Mike Stump0dd9e882009-02-08 23:14:22 +0000714 /// EmitAnyExprToTemp - Similary to EmitAnyExpr(), however, the result will
715 /// always be accessible even if no aggregate location is provided.
Anders Carlsson14c5cbf2009-08-16 07:36:22 +0000716 RValue EmitAnyExprToTemp(const Expr *E, bool IsAggLocVolatile = false,
717 bool IsInitializer = false);
Daniel Dunbar46f45b92008-09-09 01:06:48 +0000718
John McCall3d3ec1c2010-04-21 10:05:39 +0000719 /// EmitsAnyExprToMem - Emits the code necessary to evaluate an
720 /// arbitrary expression into the given memory location.
721 void EmitAnyExprToMem(const Expr *E, llvm::Value *Location,
722 bool IsLocationVolatile = false,
723 bool IsInitializer = false);
724
Mike Stump27fe2e62009-05-23 22:29:41 +0000725 /// EmitAggregateCopy - Emit an aggrate copy.
726 ///
727 /// \param isVolatile - True iff either the source or the destination is
728 /// volatile.
Daniel Dunbar7482d122008-09-09 20:49:46 +0000729 void EmitAggregateCopy(llvm::Value *DestPtr, llvm::Value *SrcPtr,
Mike Stump27fe2e62009-05-23 22:29:41 +0000730 QualType EltTy, bool isVolatile=false);
Daniel Dunbar7482d122008-09-09 20:49:46 +0000731
Devang Patel51b09f22007-10-04 23:45:31 +0000732 /// StartBlock - Start new block named N. If insert block is a dummy block
733 /// then reuse it.
734 void StartBlock(const char *N);
735
Lauro Ramos Venancio81373352008-02-26 21:41:45 +0000736 /// GetAddrOfStaticLocalVar - Return the address of a static local variable.
Steve Naroff248a7532008-04-15 22:42:06 +0000737 llvm::Constant *GetAddrOfStaticLocalVar(const VarDecl *BVD);
Dan Gohman4f8d1232008-05-22 00:50:06 +0000738
Anders Carlssondde0a942008-09-11 09:15:33 +0000739 /// GetAddrOfLocalVar - Return the address of a local variable.
740 llvm::Value *GetAddrOfLocalVar(const VarDecl *VD);
Mike Stump0dd9e882009-02-08 23:14:22 +0000741
Dan Gohman4f8d1232008-05-22 00:50:06 +0000742 /// getAccessedFieldNo - Given an encoded value and a result number, return
743 /// the input field number being accessed.
744 static unsigned getAccessedFieldNo(unsigned Idx, const llvm::Constant *Elts);
745
Chris Lattnerd9becd12009-10-28 23:59:40 +0000746 llvm::BlockAddress *GetAddrOfLabel(const LabelStmt *L);
Chris Lattner3d00fdc2009-10-13 06:55:33 +0000747 llvm::BasicBlock *GetIndirectGotoBlock();
Daniel Dunbar0ffb1252008-08-04 16:51:22 +0000748
Anders Carlsson1884eb02010-05-22 17:35:42 +0000749 /// EmitNullInitialization - Generate code to set a value of the given type to
750 /// null, If the type contains data member pointers, they will be initialized
751 /// to -1 in accordance with the Itanium C++ ABI.
752 void EmitNullInitialization(llvm::Value *DestPtr, QualType Ty);
Anders Carlssonddf7cac2008-11-04 05:30:00 +0000753
754 // EmitVAArg - Generate code to get an argument from the passed in pointer
755 // and update it accordingly. The return value is a pointer to the argument.
756 // FIXME: We should be able to get rid of this method and use the va_arg
Mike Stump0dd9e882009-02-08 23:14:22 +0000757 // instruction in LLVM instead once it works well enough.
Anders Carlssonddf7cac2008-11-04 05:30:00 +0000758 llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty);
Anders Carlssonf666b772008-12-20 20:27:15 +0000759
Mike Stumpf71d2322009-11-30 20:08:49 +0000760 /// EmitVLASize - Generate code for any VLA size expressions that might occur
761 /// in a variably modified type. If Ty is a VLA, will return the value that
762 /// corresponds to the size in bytes of the VLA type. Will return 0 otherwise.
Daniel Dunbard286f052009-07-19 06:58:07 +0000763 ///
764 /// This function can be called with a null (unreachable) insert point.
Anders Carlsson60d35412008-12-20 20:46:34 +0000765 llvm::Value *EmitVLASize(QualType Ty);
Mike Stump0dd9e882009-02-08 23:14:22 +0000766
Anders Carlssondcc90d82008-12-12 07:19:02 +0000767 // GetVLASize - Returns an LLVM value that corresponds to the size in bytes
768 // of a variable length array type.
769 llvm::Value *GetVLASize(const VariableArrayType *);
770
Anders Carlsson5f4307b2009-04-14 16:58:56 +0000771 /// LoadCXXThis - Load the value of 'this'. This function is only valid while
772 /// generating code for an C++ member function.
John McCall25049412010-02-16 22:04:33 +0000773 llvm::Value *LoadCXXThis() {
774 assert(CXXThisValue && "no 'this' value for this function");
775 return CXXThisValue;
776 }
Mike Stump1eb44332009-09-09 15:08:12 +0000777
Anders Carlssonc997d422010-01-02 01:01:18 +0000778 /// LoadCXXVTT - Load the VTT parameter to base constructors/destructors have
779 /// virtual bases.
John McCall25049412010-02-16 22:04:33 +0000780 llvm::Value *LoadCXXVTT() {
781 assert(CXXVTTValue && "no VTT value for this function");
782 return CXXVTTValue;
783 }
John McCallbff225e2010-02-16 04:15:37 +0000784
785 /// GetAddressOfBaseOfCompleteClass - Convert the given pointer to a
Anders Carlsson8561a862010-04-24 23:01:49 +0000786 /// complete class to the given direct base.
787 llvm::Value *
788 GetAddressOfDirectBaseInCompleteClass(llvm::Value *Value,
789 const CXXRecordDecl *Derived,
790 const CXXRecordDecl *Base,
791 bool BaseIsVirtual);
Anders Carlssona88ad562010-04-24 21:51:08 +0000792
Mike Stumpf71d2322009-11-30 20:08:49 +0000793 /// GetAddressOfBaseClass - This function will add the necessary delta to the
794 /// load of 'this' and returns address of the base class.
Anders Carlsson34a2d382010-04-24 21:06:20 +0000795 llvm::Value *GetAddressOfBaseClass(llvm::Value *Value,
Anders Carlsson8561a862010-04-24 23:01:49 +0000796 const CXXRecordDecl *Derived,
Anders Carlsson34a2d382010-04-24 21:06:20 +0000797 const CXXBaseSpecifierArray &BasePath,
798 bool NullCheckValue);
799
Anders Carlssona3697c92009-11-23 17:57:54 +0000800 llvm::Value *GetAddressOfDerivedClass(llvm::Value *Value,
Anders Carlsson8561a862010-04-24 23:01:49 +0000801 const CXXRecordDecl *Derived,
Anders Carlssona04efdf2010-04-24 21:23:59 +0000802 const CXXBaseSpecifierArray &BasePath,
Anders Carlssona3697c92009-11-23 17:57:54 +0000803 bool NullCheckValue);
804
Anders Carlssonbb7e17b2010-01-31 01:36:53 +0000805 llvm::Value *GetVirtualBaseClassOffset(llvm::Value *This,
806 const CXXRecordDecl *ClassDecl,
807 const CXXRecordDecl *BaseClassDecl);
Anders Carlsson2f1986b2009-10-06 22:43:30 +0000808
John McCallc0bf4622010-02-23 00:48:20 +0000809 void EmitDelegateCXXConstructorCall(const CXXConstructorDecl *Ctor,
810 CXXCtorType CtorType,
811 const FunctionArgList &Args);
Anders Carlsson155ed4a2010-05-02 23:20:53 +0000812 void EmitCXXConstructorCall(const CXXConstructorDecl *D, CXXCtorType Type,
813 bool ForVirtualBase, llvm::Value *This,
Anders Carlssonb14095a2009-04-17 00:06:03 +0000814 CallExpr::const_arg_iterator ArgBeg,
815 CallExpr::const_arg_iterator ArgEnd);
Mike Stump1eb44332009-09-09 15:08:12 +0000816
Fariborz Jahanian288dcaf2009-08-19 20:55:16 +0000817 void EmitCXXAggrConstructorCall(const CXXConstructorDecl *D,
Anders Carlsson569c1f42009-09-23 02:45:36 +0000818 const ConstantArrayType *ArrayTy,
Anders Carlsson5d4d9462009-11-24 18:43:52 +0000819 llvm::Value *ArrayPtr,
820 CallExpr::const_arg_iterator ArgBeg,
821 CallExpr::const_arg_iterator ArgEnd);
822
Anders Carlsson569c1f42009-09-23 02:45:36 +0000823 void EmitCXXAggrConstructorCall(const CXXConstructorDecl *D,
824 llvm::Value *NumElements,
Anders Carlsson5d4d9462009-11-24 18:43:52 +0000825 llvm::Value *ArrayPtr,
826 CallExpr::const_arg_iterator ArgBeg,
827 CallExpr::const_arg_iterator ArgEnd);
Anders Carlssonb14095a2009-04-17 00:06:03 +0000828
Fariborz Jahanianf800f6c2009-08-20 20:54:15 +0000829 void EmitCXXAggrDestructorCall(const CXXDestructorDecl *D,
830 const ArrayType *Array,
831 llvm::Value *This);
Mike Stump1eb44332009-09-09 15:08:12 +0000832
Fariborz Jahanian72c21532009-11-13 19:27:47 +0000833 void EmitCXXAggrDestructorCall(const CXXDestructorDecl *D,
834 llvm::Value *NumElements,
835 llvm::Value *This);
836
Anders Carlsson02e370a2010-06-08 22:14:59 +0000837 llvm::Function *GenerateCXXAggrDestructorHelper(const CXXDestructorDecl *D,
838 const ArrayType *Array,
839 llvm::Value *This);
Fariborz Jahanian88f42802009-11-10 19:24:06 +0000840
Anders Carlsson7267c162009-05-29 21:03:38 +0000841 void EmitCXXDestructorCall(const CXXDestructorDecl *D, CXXDtorType Type,
Anders Carlsson8e6404c2010-05-02 23:29:11 +0000842 bool ForVirtualBase, llvm::Value *This);
Mike Stump1eb44332009-09-09 15:08:12 +0000843
Anders Carlsson543ac0c2009-05-31 00:34:10 +0000844 void PushCXXTemporary(const CXXTemporary *Temporary, llvm::Value *Ptr);
Anders Carlssonf4b8fea2009-06-03 19:05:16 +0000845 void PopCXXTemporary();
Mike Stump1eb44332009-09-09 15:08:12 +0000846
Anders Carlssona00703d2009-05-31 01:40:14 +0000847 llvm::Value *EmitCXXNewExpr(const CXXNewExpr *E);
Anders Carlsson60e282c2009-08-16 21:13:42 +0000848 void EmitCXXDeleteExpr(const CXXDeleteExpr *E);
Mike Stump1eb44332009-09-09 15:08:12 +0000849
Eli Friedman4bf81522009-11-18 00:57:03 +0000850 void EmitDeleteCall(const FunctionDecl *DeleteFD, llvm::Value *Ptr,
851 QualType DeleteTy);
852
Mike Stumpc2e84ae2009-11-15 08:09:41 +0000853 llvm::Value* EmitCXXTypeidExpr(const CXXTypeidExpr *E);
Mike Stumpc849c052009-11-16 06:50:58 +0000854 llvm::Value *EmitDynamicCast(llvm::Value *V, const CXXDynamicCastExpr *DCE);
Mike Stumpc2e84ae2009-11-15 08:09:41 +0000855
Mike Stumpb14e62d2009-12-16 02:57:00 +0000856 void EmitCheck(llvm::Value *, unsigned Size);
857
Chris Lattnerdd36d322010-01-09 21:40:03 +0000858 llvm::Value *EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV,
859 bool isInc, bool isPre);
860 ComplexPairTy EmitComplexPrePostIncDec(const UnaryOperator *E, LValue LV,
861 bool isInc, bool isPre);
Reid Spencer5f016e22007-07-11 17:01:13 +0000862 //===--------------------------------------------------------------------===//
Reid Spencer5f016e22007-07-11 17:01:13 +0000863 // Declaration Emission
864 //===--------------------------------------------------------------------===//
Mike Stump0dd9e882009-02-08 23:14:22 +0000865
Daniel Dunbard286f052009-07-19 06:58:07 +0000866 /// EmitDecl - Emit a declaration.
867 ///
868 /// This function can be called with a null (unreachable) insert point.
Reid Spencer5f016e22007-07-11 17:01:13 +0000869 void EmitDecl(const Decl &D);
Daniel Dunbard286f052009-07-19 06:58:07 +0000870
Mike Stump1eb44332009-09-09 15:08:12 +0000871 /// EmitBlockVarDecl - Emit a block variable declaration.
Daniel Dunbard286f052009-07-19 06:58:07 +0000872 ///
873 /// This function can be called with a null (unreachable) insert point.
Steve Naroff248a7532008-04-15 22:42:06 +0000874 void EmitBlockVarDecl(const VarDecl &D);
Daniel Dunbard286f052009-07-19 06:58:07 +0000875
876 /// EmitLocalBlockVarDecl - Emit a local block variable declaration.
877 ///
878 /// This function can be called with a null (unreachable) insert point.
Steve Naroff248a7532008-04-15 22:42:06 +0000879 void EmitLocalBlockVarDecl(const VarDecl &D);
Daniel Dunbard286f052009-07-19 06:58:07 +0000880
Anders Carlssonf6b89a12010-02-07 02:03:08 +0000881 void EmitStaticBlockVarDecl(const VarDecl &D,
882 llvm::GlobalValue::LinkageTypes Linkage);
Daniel Dunbarb7ec2462008-08-16 03:19:19 +0000883
884 /// EmitParmDecl - Emit a ParmVarDecl or an ImplicitParamDecl.
885 void EmitParmDecl(const VarDecl &D, llvm::Value *Arg);
Mike Stump0dd9e882009-02-08 23:14:22 +0000886
Reid Spencer5f016e22007-07-11 17:01:13 +0000887 //===--------------------------------------------------------------------===//
888 // Statement Emission
889 //===--------------------------------------------------------------------===//
890
Mike Stump0dd9e882009-02-08 23:14:22 +0000891 /// EmitStopPoint - Emit a debug stoppoint if we are emitting debug info.
Daniel Dunbar09124252008-11-12 08:21:33 +0000892 void EmitStopPoint(const Stmt *S);
893
Mike Stump0dd9e882009-02-08 23:14:22 +0000894 /// EmitStmt - Emit the code for the statement \arg S. It is legal to call
895 /// this function even if there is no current insertion point.
896 ///
897 /// This function may clear the current insertion point; callers should use
898 /// EnsureInsertPoint if they wish to subsequently generate code without first
899 /// calling EmitBlock, EmitBranch, or EmitStmt.
Reid Spencer5f016e22007-07-11 17:01:13 +0000900 void EmitStmt(const Stmt *S);
Daniel Dunbara448fb22008-11-11 23:11:34 +0000901
Daniel Dunbar09124252008-11-12 08:21:33 +0000902 /// EmitSimpleStmt - Try to emit a "simple" statement which does not
Mike Stump0dd9e882009-02-08 23:14:22 +0000903 /// necessarily require an insertion point or debug information; typically
904 /// because the statement amounts to a jump or a container of other
905 /// statements.
Daniel Dunbar09124252008-11-12 08:21:33 +0000906 ///
907 /// \return True if the statement was handled.
908 bool EmitSimpleStmt(const Stmt *S);
909
Chris Lattner9b655512007-08-31 22:49:20 +0000910 RValue EmitCompoundStmt(const CompoundStmt &S, bool GetLast = false,
911 llvm::Value *AggLoc = 0, bool isAggVol = false);
Daniel Dunbara448fb22008-11-11 23:11:34 +0000912
Mike Stump0dd9e882009-02-08 23:14:22 +0000913 /// EmitLabel - Emit the block for the given label. It is legal to call this
914 /// function even if there is no current insertion point.
Chris Lattner91d723d2008-07-26 20:23:23 +0000915 void EmitLabel(const LabelStmt &S); // helper for EmitLabelStmt.
Daniel Dunbara448fb22008-11-11 23:11:34 +0000916
Reid Spencer5f016e22007-07-11 17:01:13 +0000917 void EmitLabelStmt(const LabelStmt &S);
918 void EmitGotoStmt(const GotoStmt &S);
Daniel Dunbar0ffb1252008-08-04 16:51:22 +0000919 void EmitIndirectGotoStmt(const IndirectGotoStmt &S);
Reid Spencer5f016e22007-07-11 17:01:13 +0000920 void EmitIfStmt(const IfStmt &S);
921 void EmitWhileStmt(const WhileStmt &S);
922 void EmitDoStmt(const DoStmt &S);
923 void EmitForStmt(const ForStmt &S);
924 void EmitReturnStmt(const ReturnStmt &S);
925 void EmitDeclStmt(const DeclStmt &S);
Daniel Dunbar09124252008-11-12 08:21:33 +0000926 void EmitBreakStmt(const BreakStmt &S);
927 void EmitContinueStmt(const ContinueStmt &S);
Devang Patel51b09f22007-10-04 23:45:31 +0000928 void EmitSwitchStmt(const SwitchStmt &S);
929 void EmitDefaultStmt(const DefaultStmt &S);
930 void EmitCaseStmt(const CaseStmt &S);
Devang Patelc049e4f2007-10-08 20:57:48 +0000931 void EmitCaseStmtRange(const CaseStmt &S);
Anders Carlssonfb1aeb82008-02-05 16:35:33 +0000932 void EmitAsmStmt(const AsmStmt &S);
Mike Stump0dd9e882009-02-08 23:14:22 +0000933
Anders Carlsson3d8400d2008-08-30 19:51:14 +0000934 void EmitObjCForCollectionStmt(const ObjCForCollectionStmt &S);
Anders Carlsson64d5d6c2008-09-09 10:04:29 +0000935 void EmitObjCAtTryStmt(const ObjCAtTryStmt &S);
936 void EmitObjCAtThrowStmt(const ObjCAtThrowStmt &S);
Chris Lattner10cac6f2008-11-15 21:26:17 +0000937 void EmitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt &S);
Mike Stump0dd9e882009-02-08 23:14:22 +0000938
Douglas Gregor86a3a032010-05-16 01:24:12 +0000939 llvm::Constant *getUnwindResumeOrRethrowFn();
John McCall9fc6a772010-02-19 09:25:03 +0000940 struct CXXTryStmtInfo {
941 llvm::BasicBlock *SavedLandingPad;
942 llvm::BasicBlock *HandlerBlock;
943 llvm::BasicBlock *FinallyBlock;
944 };
945 CXXTryStmtInfo EnterCXXTryStmt(const CXXTryStmt &S);
946 void ExitCXXTryStmt(const CXXTryStmt &S, CXXTryStmtInfo Info);
947
Anders Carlsson6815e942009-09-27 18:58:34 +0000948 void EmitCXXTryStmt(const CXXTryStmt &S);
949
Reid Spencer5f016e22007-07-11 17:01:13 +0000950 //===--------------------------------------------------------------------===//
951 // LValue Expression Emission
952 //===--------------------------------------------------------------------===//
953
Daniel Dunbar13e81732009-02-05 07:09:07 +0000954 /// GetUndefRValue - Get an appropriate 'undef' rvalue for the given type.
955 RValue GetUndefRValue(QualType Ty);
956
Daniel Dunbarce1d38b2009-01-09 16:50:52 +0000957 /// EmitUnsupportedRValue - Emit a dummy r-value using the type of E
958 /// and issue an ErrorUnsupported style diagnostic (using the
959 /// provided Name).
960 RValue EmitUnsupportedRValue(const Expr *E,
961 const char *Name);
962
Mike Stump0dd9e882009-02-08 23:14:22 +0000963 /// EmitUnsupportedLValue - Emit a dummy l-value using the type of E and issue
964 /// an ErrorUnsupported style diagnostic (using the provided Name).
Daniel Dunbar6ba82a42008-08-25 20:45:57 +0000965 LValue EmitUnsupportedLValue(const Expr *E,
966 const char *Name);
967
Reid Spencer5f016e22007-07-11 17:01:13 +0000968 /// EmitLValue - Emit code to compute a designator that specifies the location
969 /// of the expression.
970 ///
971 /// This can return one of two things: a simple address or a bitfield
972 /// reference. In either case, the LLVM Value* in the LValue structure is
973 /// guaranteed to be an LLVM pointer type.
974 ///
975 /// If this returns a bitfield reference, nothing about the pointee type of
976 /// the LLVM value is known: For example, it may not be a pointer to an
977 /// integer.
978 ///
979 /// If this returns a normal address, and if the lvalue's C type is fixed
980 /// size, this method guarantees that the returned pointer type will point to
981 /// an LLVM type of the same size of the lvalue's type. If the lvalue has a
982 /// variable length type, this is not possible.
983 ///
984 LValue EmitLValue(const Expr *E);
Mike Stump0dd9e882009-02-08 23:14:22 +0000985
Mike Stumpb14e62d2009-12-16 02:57:00 +0000986 /// EmitCheckedLValue - Same as EmitLValue but additionally we generate
987 /// checking code to guard against undefined behavior. This is only
988 /// suitable when we know that the address will be used to access the
989 /// object.
990 LValue EmitCheckedLValue(const Expr *E);
991
Daniel Dunbar9d9cc872009-02-10 00:57:50 +0000992 /// EmitLoadOfScalar - Load a scalar value from an address, taking
993 /// care to appropriately convert from the memory representation to
994 /// the LLVM value representation.
Mike Stump09429b92009-02-17 17:00:02 +0000995 llvm::Value *EmitLoadOfScalar(llvm::Value *Addr, bool Volatile,
Daniel Dunbar9d9cc872009-02-10 00:57:50 +0000996 QualType Ty);
997
998 /// EmitStoreOfScalar - Store a scalar value to an address, taking
999 /// care to appropriately convert from the memory representation to
1000 /// the LLVM value representation.
Mike Stump09429b92009-02-17 17:00:02 +00001001 void EmitStoreOfScalar(llvm::Value *Value, llvm::Value *Addr,
Anders Carlssonb4aa4662009-05-19 18:50:41 +00001002 bool Volatile, QualType Ty);
Daniel Dunbar9d9cc872009-02-10 00:57:50 +00001003
Reid Spencer5f016e22007-07-11 17:01:13 +00001004 /// EmitLoadOfLValue - Given an expression that represents a value lvalue,
1005 /// this method emits the address of the lvalue, then loads the result as an
1006 /// rvalue, returning the rvalue.
Reid Spencer5f016e22007-07-11 17:01:13 +00001007 RValue EmitLoadOfLValue(LValue V, QualType LVType);
Nate Begeman213541a2008-04-18 23:10:10 +00001008 RValue EmitLoadOfExtVectorElementLValue(LValue V, QualType LVType);
Lauro Ramos Venancio3b8c22d2008-01-22 20:17:04 +00001009 RValue EmitLoadOfBitfieldLValue(LValue LV, QualType ExprType);
Daniel Dunbar85c59ed2008-08-29 08:11:39 +00001010 RValue EmitLoadOfPropertyRefLValue(LValue LV, QualType ExprType);
Fariborz Jahanian43f44702008-11-22 22:30:21 +00001011 RValue EmitLoadOfKVCRefLValue(LValue LV, QualType ExprType);
Reid Spencer5f016e22007-07-11 17:01:13 +00001012
Mike Stump0dd9e882009-02-08 23:14:22 +00001013
Reid Spencer5f016e22007-07-11 17:01:13 +00001014 /// EmitStoreThroughLValue - Store the specified rvalue into the specified
1015 /// lvalue, where both are guaranteed to the have the same type, and that type
1016 /// is 'Ty'.
1017 void EmitStoreThroughLValue(RValue Src, LValue Dst, QualType Ty);
Nate Begeman213541a2008-04-18 23:10:10 +00001018 void EmitStoreThroughExtVectorComponentLValue(RValue Src, LValue Dst,
1019 QualType Ty);
Daniel Dunbar85c59ed2008-08-29 08:11:39 +00001020 void EmitStoreThroughPropertyRefLValue(RValue Src, LValue Dst, QualType Ty);
Fariborz Jahanian43f44702008-11-22 22:30:21 +00001021 void EmitStoreThroughKVCRefLValue(RValue Src, LValue Dst, QualType Ty);
Daniel Dunbared3849b2008-11-19 09:36:46 +00001022
Mike Stump0dd9e882009-02-08 23:14:22 +00001023 /// EmitStoreThroughLValue - Store Src into Dst with same constraints as
1024 /// EmitStoreThroughLValue.
Daniel Dunbared3849b2008-11-19 09:36:46 +00001025 ///
Mike Stump0dd9e882009-02-08 23:14:22 +00001026 /// \param Result [out] - If non-null, this will be set to a Value* for the
1027 /// bit-field contents after the store, appropriate for use as the result of
1028 /// an assignment to the bit-field.
Daniel Dunbared3849b2008-11-19 09:36:46 +00001029 void EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst, QualType Ty,
1030 llvm::Value **Result=0);
Mike Stump0dd9e882009-02-08 23:14:22 +00001031
Christopher Lamb22c940e2007-12-29 05:02:41 +00001032 // Note: only availabe for agg return types
Daniel Dunbar80e62c22008-09-04 03:20:13 +00001033 LValue EmitBinaryOperatorLValue(const BinaryOperator *E);
Douglas Gregor6a03e342010-04-23 04:16:32 +00001034 LValue EmitCompoundAssignOperatorLValue(const CompoundAssignOperator *E);
Daniel Dunbar5b5c9ef2009-02-11 20:59:32 +00001035 // Note: only available for agg return types
Christopher Lamb22c940e2007-12-29 05:02:41 +00001036 LValue EmitCallExprLValue(const CallExpr *E);
Daniel Dunbar5b5c9ef2009-02-11 20:59:32 +00001037 // Note: only available for agg return types
1038 LValue EmitVAArgExprLValue(const VAArgExpr *E);
Reid Spencer5f016e22007-07-11 17:01:13 +00001039 LValue EmitDeclRefLValue(const DeclRefExpr *E);
1040 LValue EmitStringLiteralLValue(const StringLiteral *E);
Chris Lattnereaf2bb82009-02-24 22:18:39 +00001041 LValue EmitObjCEncodeExprLValue(const ObjCEncodeExpr *E);
Daniel Dunbar662b71e2008-10-17 21:58:32 +00001042 LValue EmitPredefinedFunctionName(unsigned Type);
Chris Lattnerd9f69102008-08-10 01:53:14 +00001043 LValue EmitPredefinedLValue(const PredefinedExpr *E);
Reid Spencer5f016e22007-07-11 17:01:13 +00001044 LValue EmitUnaryOpLValue(const UnaryOperator *E);
1045 LValue EmitArraySubscriptExpr(const ArraySubscriptExpr *E);
Nate Begeman213541a2008-04-18 23:10:10 +00001046 LValue EmitExtVectorElementExpr(const ExtVectorElementExpr *E);
Devang Patelb84a06e2007-10-23 02:10:49 +00001047 LValue EmitMemberExpr(const MemberExpr *E);
Fariborz Jahanian820bca42009-12-09 23:35:29 +00001048 LValue EmitObjCIsaExpr(const ObjCIsaExpr *E);
Eli Friedman06e863f2008-05-13 23:18:27 +00001049 LValue EmitCompoundLiteralLValue(const CompoundLiteralExpr *E);
Anders Carlsson6fcec8b2009-09-15 16:35:24 +00001050 LValue EmitConditionalOperatorLValue(const ConditionalOperator *E);
Chris Lattner75dfeda2009-03-18 18:28:57 +00001051 LValue EmitCastLValue(const CastExpr *E);
Fariborz Jahanian48620ba2009-10-20 23:29:04 +00001052 LValue EmitNullInitializationLValue(const CXXZeroInitValueExpr *E);
Anders Carlsson909fbf72009-11-07 22:00:15 +00001053
Daniel Dunbar2a031922009-04-22 05:08:15 +00001054 llvm::Value *EmitIvarOffset(const ObjCInterfaceDecl *Interface,
Daniel Dunbar29e0bcc2008-09-24 04:00:38 +00001055 const ObjCIvarDecl *Ivar);
John McCalla9976d32010-05-21 01:18:57 +00001056 LValue EmitLValueForAnonRecordField(llvm::Value* Base,
1057 const FieldDecl* Field,
1058 unsigned CVRQualifiers);
Anders Carlsson0ed303c2009-11-17 03:57:07 +00001059 LValue EmitLValueForField(llvm::Value* Base, const FieldDecl* Field,
Anders Carlssone6d2a532010-01-29 05:05:36 +00001060 unsigned CVRQualifiers);
Anders Carlsson06a29702010-01-29 05:24:29 +00001061
1062 /// EmitLValueForFieldInitialization - Like EmitLValueForField, except that
1063 /// if the Field is a reference, this will return the address of the reference
1064 /// and not the address of the value stored in the reference.
1065 LValue EmitLValueForFieldInitialization(llvm::Value* Base,
1066 const FieldDecl* Field,
1067 unsigned CVRQualifiers);
1068
Fariborz Jahanian45012a72009-02-03 00:09:52 +00001069 LValue EmitLValueForIvar(QualType ObjectTy,
1070 llvm::Value* Base, const ObjCIvarDecl *Ivar,
Daniel Dunbar29e0bcc2008-09-24 04:00:38 +00001071 unsigned CVRQualifiers);
1072
Anders Carlsson0ed303c2009-11-17 03:57:07 +00001073 LValue EmitLValueForBitfield(llvm::Value* Base, const FieldDecl* Field,
Fariborz Jahanian598d3f62009-02-03 19:03:09 +00001074 unsigned CVRQualifiers);
Fariborz Jahanianfd64bb62008-12-15 20:35:07 +00001075
Mike Stumpa99038c2009-02-28 09:07:16 +00001076 LValue EmitBlockDeclRefLValue(const BlockDeclRefExpr *E);
1077
Anders Carlssonb58d0172009-05-30 23:23:33 +00001078 LValue EmitCXXConstructLValue(const CXXConstructExpr *E);
Anders Carlssone61c9e82009-05-30 23:30:54 +00001079 LValue EmitCXXBindTemporaryLValue(const CXXBindTemporaryExpr *E);
Anders Carlssonb9ea0b52009-09-14 01:10:45 +00001080 LValue EmitCXXExprWithTemporariesLValue(const CXXExprWithTemporaries *E);
Mike Stumpc2e84ae2009-11-15 08:09:41 +00001081 LValue EmitCXXTypeidLValue(const CXXTypeidExpr *E);
Anders Carlssonb9ea0b52009-09-14 01:10:45 +00001082
Daniel Dunbar0a04d772008-08-23 10:51:21 +00001083 LValue EmitObjCMessageExprLValue(const ObjCMessageExpr *E);
Chris Lattner391d77a2008-03-30 23:03:07 +00001084 LValue EmitObjCIvarRefLValue(const ObjCIvarRefExpr *E);
Daniel Dunbar85c59ed2008-08-29 08:11:39 +00001085 LValue EmitObjCPropertyRefLValue(const ObjCPropertyRefExpr *E);
Fariborz Jahanian09105f52009-08-20 17:02:02 +00001086 LValue EmitObjCKVCRefLValue(const ObjCImplicitSetterGetterRefExpr *E);
Chris Lattner65459942009-04-25 19:35:26 +00001087 LValue EmitObjCSuperExprLValue(const ObjCSuperExpr *E);
1088 LValue EmitStmtExprLValue(const StmtExpr *E);
Fariborz Jahanian8bfd31f2009-10-22 22:57:31 +00001089 LValue EmitPointerToDataMemberBinaryExpr(const BinaryOperator *E);
1090
Reid Spencer5f016e22007-07-11 17:01:13 +00001091 //===--------------------------------------------------------------------===//
Chris Lattner883f6a72007-08-11 00:04:45 +00001092 // Scalar Expression Emission
Reid Spencer5f016e22007-07-11 17:01:13 +00001093 //===--------------------------------------------------------------------===//
1094
Mike Stump0dd9e882009-02-08 23:14:22 +00001095 /// EmitCall - Generate a call of the given function, expecting the given
1096 /// result type, and using the given argument list which specifies both the
1097 /// LLVM arguments and the types they were derived from.
Daniel Dunbarc0ef9f52009-02-20 18:06:48 +00001098 ///
Mike Stumpf71d2322009-11-30 20:08:49 +00001099 /// \param TargetDecl - If given, the decl of the function in a direct call;
1100 /// used to set attributes on the call (noreturn, etc.).
Daniel Dunbar88b53962009-02-02 22:03:45 +00001101 RValue EmitCall(const CGFunctionInfo &FnInfo,
1102 llvm::Value *Callee,
Anders Carlssonf3c47c92009-12-24 19:25:24 +00001103 ReturnValueSlot ReturnValue,
Daniel Dunbarc0ef9f52009-02-20 18:06:48 +00001104 const CallArgList &Args,
David Chisnalldd5c98f2010-05-01 11:15:56 +00001105 const Decl *TargetDecl = 0,
David Chisnall4b02afc2010-05-02 13:41:58 +00001106 llvm::Instruction **callOrInvoke = 0);
Mike Stump1eb44332009-09-09 15:08:12 +00001107
Anders Carlsson31777a22009-12-24 19:08:58 +00001108 RValue EmitCall(QualType FnType, llvm::Value *Callee,
Anders Carlssond2490a92009-12-24 20:40:36 +00001109 ReturnValueSlot ReturnValue,
Anders Carlsson98647712009-05-27 01:22:39 +00001110 CallExpr::const_arg_iterator ArgBeg,
1111 CallExpr::const_arg_iterator ArgEnd,
1112 const Decl *TargetDecl = 0);
Anders Carlssond2490a92009-12-24 20:40:36 +00001113 RValue EmitCallExpr(const CallExpr *E,
1114 ReturnValueSlot ReturnValue = ReturnValueSlot());
Mike Stump1eb44332009-09-09 15:08:12 +00001115
Anders Carlsson566abee2009-11-13 04:45:41 +00001116 llvm::Value *BuildVirtualCall(const CXXMethodDecl *MD, llvm::Value *This,
Mike Stumpf0070db2009-08-26 20:46:33 +00001117 const llvm::Type *Ty);
Anders Carlsson566abee2009-11-13 04:45:41 +00001118 llvm::Value *BuildVirtualCall(const CXXDestructorDecl *DD, CXXDtorType Type,
1119 llvm::Value *&This, const llvm::Type *Ty);
1120
Anders Carlssonb9de2c52009-05-11 23:37:08 +00001121 RValue EmitCXXMemberCall(const CXXMethodDecl *MD,
1122 llvm::Value *Callee,
Anders Carlssona1736c02009-12-24 21:13:40 +00001123 ReturnValueSlot ReturnValue,
Anders Carlssonb9de2c52009-05-11 23:37:08 +00001124 llvm::Value *This,
Anders Carlssonc997d422010-01-02 01:01:18 +00001125 llvm::Value *VTT,
Anders Carlssonb9de2c52009-05-11 23:37:08 +00001126 CallExpr::const_arg_iterator ArgBeg,
1127 CallExpr::const_arg_iterator ArgEnd);
Anders Carlssona1736c02009-12-24 21:13:40 +00001128 RValue EmitCXXMemberCallExpr(const CXXMemberCallExpr *E,
1129 ReturnValueSlot ReturnValue);
1130 RValue EmitCXXMemberPointerCallExpr(const CXXMemberCallExpr *E,
1131 ReturnValueSlot ReturnValue);
Ted Kremenek55499762008-06-17 02:43:46 +00001132
Anders Carlsson0f294632009-05-27 04:18:27 +00001133 RValue EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E,
Anders Carlssona1736c02009-12-24 21:13:40 +00001134 const CXXMethodDecl *MD,
1135 ReturnValueSlot ReturnValue);
Mike Stump1eb44332009-09-09 15:08:12 +00001136
Anders Carlsson375c31c2009-10-03 19:43:08 +00001137
Mike Stump1eb44332009-09-09 15:08:12 +00001138 RValue EmitBuiltinExpr(const FunctionDecl *FD,
Daniel Dunbaref2abfe2009-02-16 22:43:43 +00001139 unsigned BuiltinID, const CallExpr *E);
Reid Spencer5f016e22007-07-11 17:01:13 +00001140
Anders Carlssona1736c02009-12-24 21:13:40 +00001141 RValue EmitBlockCallExpr(const CallExpr *E, ReturnValueSlot ReturnValue);
Mike Stump09429b92009-02-17 17:00:02 +00001142
Mike Stump0dd9e882009-02-08 23:14:22 +00001143 /// EmitTargetBuiltinExpr - Emit the given builtin call. Returns 0 if the call
1144 /// is unhandled by the current target.
Daniel Dunbarf02e9dd2008-10-10 00:24:54 +00001145 llvm::Value *EmitTargetBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
1146
Chris Lattner2752c012010-03-03 19:03:45 +00001147 llvm::Value *EmitARMBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
Nate Begeman30d91712010-06-08 06:03:01 +00001148 llvm::Value *EmitNeonCall(llvm::Function *F,
1149 llvm::SmallVectorImpl<llvm::Value*> &O,
Nate Begemand075c012010-06-10 00:17:56 +00001150 const char *name, bool splat = false);
1151 llvm::Value *EmitNeonSplat(llvm::Value *V, llvm::Constant *Idx);
Nate Begeman464ccb62010-06-11 22:57:12 +00001152 llvm::Value *EmitNeonShiftVector(llvm::Value *V, const llvm::Type *Ty,
1153 bool negateForRightShift = false);
Nate Begeman30d91712010-06-08 06:03:01 +00001154
Anders Carlsson564f1de2007-12-09 23:17:02 +00001155 llvm::Value *EmitX86BuiltinExpr(unsigned BuiltinID, const CallExpr *E);
1156 llvm::Value *EmitPPCBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
Mike Stump0dd9e882009-02-08 23:14:22 +00001157
Daniel Dunbared7c6182008-08-20 00:28:19 +00001158 llvm::Value *EmitObjCProtocolExpr(const ObjCProtocolExpr *E);
Chris Lattner7f02f722007-08-24 05:35:26 +00001159 llvm::Value *EmitObjCStringLiteral(const ObjCStringLiteral *E);
Chris Lattner8fdf3282008-06-24 17:04:18 +00001160 llvm::Value *EmitObjCSelectorExpr(const ObjCSelectorExpr *E);
John McCallef072fd2010-05-22 01:48:05 +00001161 RValue EmitObjCMessageExpr(const ObjCMessageExpr *E,
1162 ReturnValueSlot Return = ReturnValueSlot());
1163 RValue EmitObjCPropertyGet(const Expr *E,
1164 ReturnValueSlot Return = ReturnValueSlot());
1165 RValue EmitObjCSuperPropertyGet(const Expr *Exp, const Selector &S,
1166 ReturnValueSlot Return = ReturnValueSlot());
Fariborz Jahanian43f44702008-11-22 22:30:21 +00001167 void EmitObjCPropertySet(const Expr *E, RValue Src);
Fariborz Jahanianf4695572009-03-20 19:18:21 +00001168 void EmitObjCSuperPropertySet(const Expr *E, const Selector &S, RValue Src);
Chris Lattner8fdf3282008-06-24 17:04:18 +00001169
1170
Anders Carlsson4029ca72009-05-20 00:24:07 +00001171 /// EmitReferenceBindingToExpr - Emits a reference binding to the passed in
1172 /// expression. Will emit a temporary variable if E is not an LValue.
Anders Carlssona64a8692010-02-03 16:38:03 +00001173 RValue EmitReferenceBindingToExpr(const Expr* E, bool IsInitializer = false);
Anders Carlsson3aba0932010-01-31 18:34:51 +00001174
Chris Lattner883f6a72007-08-11 00:04:45 +00001175 //===--------------------------------------------------------------------===//
Chris Lattnerbfc0c1a2007-08-26 23:13:56 +00001176 // Expression Emission
Chris Lattner883f6a72007-08-11 00:04:45 +00001177 //===--------------------------------------------------------------------===//
Chris Lattnerbfc0c1a2007-08-26 23:13:56 +00001178
1179 // Expressions are broken into three classes: scalar, complex, aggregate.
Mike Stump0dd9e882009-02-08 23:14:22 +00001180
1181 /// EmitScalarExpr - Emit the computation of the specified expression of LLVM
1182 /// scalar type, returning the result.
Anders Carlsson14c5cbf2009-08-16 07:36:22 +00001183 llvm::Value *EmitScalarExpr(const Expr *E , bool IgnoreResultAssign = false);
Mike Stump0dd9e882009-02-08 23:14:22 +00001184
Chris Lattner3707b252007-08-26 06:48:56 +00001185 /// EmitScalarConversion - Emit a conversion from the specified type to the
1186 /// specified destination type, both of which are LLVM scalar types.
1187 llvm::Value *EmitScalarConversion(llvm::Value *Src, QualType SrcTy,
1188 QualType DstTy);
Mike Stump0dd9e882009-02-08 23:14:22 +00001189
Chris Lattner4f1a7b32007-08-26 16:34:22 +00001190 /// EmitComplexToScalarConversion - Emit a conversion from the specified
Mike Stump0dd9e882009-02-08 23:14:22 +00001191 /// complex type to the specified destination type, where the destination type
1192 /// is an LLVM scalar type.
Chris Lattner4f1a7b32007-08-26 16:34:22 +00001193 llvm::Value *EmitComplexToScalarConversion(ComplexPairTy Src, QualType SrcTy,
1194 QualType DstTy);
Mike Stump0dd9e882009-02-08 23:14:22 +00001195
1196
Chris Lattner883f6a72007-08-11 00:04:45 +00001197 /// EmitAggExpr - Emit the computation of the specified expression of
1198 /// aggregate type. The result is computed into DestPtr. Note that if
1199 /// DestPtr is null, the value of the aggregate expression is not needed.
Mike Stump49d1cd52009-05-26 22:03:21 +00001200 void EmitAggExpr(const Expr *E, llvm::Value *DestPtr, bool VolatileDest,
Fariborz Jahanian08c32132009-08-31 19:33:16 +00001201 bool IgnoreResult = false, bool IsInitializer = false,
1202 bool RequiresGCollection = false);
Mike Stump0dd9e882009-02-08 23:14:22 +00001203
Daniel Dunbar18aba0d2010-02-05 19:38:31 +00001204 /// EmitAggExprToLValue - Emit the computation of the specified expression of
1205 /// aggregate type into a temporary LValue.
1206 LValue EmitAggExprToLValue(const Expr *E);
1207
Fariborz Jahanian082b02e2009-07-08 01:18:33 +00001208 /// EmitGCMemmoveCollectable - Emit special API for structs with object
1209 /// pointers.
1210 void EmitGCMemmoveCollectable(llvm::Value *DestPtr, llvm::Value *SrcPtr,
Fariborz Jahanian08c32132009-08-31 19:33:16 +00001211 QualType Ty);
Fariborz Jahanian082b02e2009-07-08 01:18:33 +00001212
Chris Lattnerb6ef18a2007-08-21 05:54:00 +00001213 /// EmitComplexExpr - Emit the computation of the specified expression of
Chris Lattner23b1cdb2007-08-23 23:43:33 +00001214 /// complex type, returning the result.
Mike Stump7f79f9b2009-05-29 15:46:01 +00001215 ComplexPairTy EmitComplexExpr(const Expr *E, bool IgnoreReal = false,
1216 bool IgnoreImag = false,
1217 bool IgnoreRealAssign = false,
1218 bool IgnoreImagAssign = false);
Mike Stump0dd9e882009-02-08 23:14:22 +00001219
Chris Lattner23b1cdb2007-08-23 23:43:33 +00001220 /// EmitComplexExprIntoAddr - Emit the computation of the specified expression
1221 /// of complex type, storing into the specified Value*.
Chris Lattner190dbe22007-08-26 16:22:13 +00001222 void EmitComplexExprIntoAddr(const Expr *E, llvm::Value *DestAddr,
1223 bool DestIsVolatile);
Daniel Dunbar7f8ea5c2008-08-30 05:35:15 +00001224
1225 /// StoreComplexToAddr - Store a complex number into the specified address.
1226 void StoreComplexToAddr(ComplexPairTy V, llvm::Value *DestAddr,
1227 bool DestIsVolatile);
Chris Lattner9b655512007-08-31 22:49:20 +00001228 /// LoadComplexFromAddr - Load a complex number from the specified address.
1229 ComplexPairTy LoadComplexFromAddr(llvm::Value *SrcAddr, bool SrcIsVolatile);
Chris Lattner2621fd12008-05-08 05:58:21 +00001230
Mike Stumpf71d2322009-11-30 20:08:49 +00001231 /// CreateStaticBlockVarDecl - Create a zero-initialized LLVM global for a
1232 /// static block var decl.
Chris Lattner761acc12009-12-05 08:22:11 +00001233 llvm::GlobalVariable *CreateStaticBlockVarDecl(const VarDecl &D,
1234 const char *Separator,
Mike Stumpf71d2322009-11-30 20:08:49 +00001235 llvm::GlobalValue::LinkageTypes Linkage);
Chris Lattner761acc12009-12-05 08:22:11 +00001236
1237 /// AddInitializerToGlobalBlockVarDecl - Add the initializer for 'D' to the
1238 /// global variable that has already been created for it. If the initializer
1239 /// has a different type than GV does, this may free GV and return a different
1240 /// one. Otherwise it just returns GV.
1241 llvm::GlobalVariable *
1242 AddInitializerToGlobalBlockVarDecl(const VarDecl &D,
1243 llvm::GlobalVariable *GV);
1244
Daniel Dunbar0096acf2009-02-25 19:24:29 +00001245
Mike Stumpf71d2322009-11-30 20:08:49 +00001246 /// EmitStaticCXXBlockVarDeclInit - Create the initializer for a C++ runtime
1247 /// initialized static block var decl.
Anders Carlsson3b2e16b2009-08-08 21:45:14 +00001248 void EmitStaticCXXBlockVarDeclInit(const VarDecl &D,
1249 llvm::GlobalVariable *GV);
Anders Carlssone1b29ef2008-08-22 16:00:37 +00001250
Anders Carlsson3b2e16b2009-08-08 21:45:14 +00001251 /// EmitCXXGlobalVarDeclInit - Create the initializer for a C++
1252 /// variable with global storage.
1253 void EmitCXXGlobalVarDeclInit(const VarDecl &D, llvm::Constant *DeclPtr);
1254
1255 /// EmitCXXGlobalDtorRegistration - Emits a call to register the global ptr
1256 /// with the C++ runtime so that its destructor will be called at exit.
Fariborz Jahanian88f42802009-11-10 19:24:06 +00001257 void EmitCXXGlobalDtorRegistration(llvm::Constant *DtorFn,
Anders Carlsson3b2e16b2009-08-08 21:45:14 +00001258 llvm::Constant *DeclPtr);
Mike Stump1eb44332009-09-09 15:08:12 +00001259
Daniel Dunbarefb0fa92010-03-20 04:15:41 +00001260 /// GenerateCXXGlobalInitFunc - Generates code for initializing global
1261 /// variables.
1262 void GenerateCXXGlobalInitFunc(llvm::Function *Fn,
1263 llvm::Constant **Decls,
1264 unsigned NumDecls);
1265
1266 /// GenerateCXXGlobalDtorFunc - Generates code for destroying global
1267 /// variables.
1268 void GenerateCXXGlobalDtorFunc(llvm::Function *Fn,
1269 const std::vector<std::pair<llvm::Constant*,
1270 llvm::Constant*> > &DtorsAndObjects);
1271
1272 void GenerateCXXGlobalVarDeclInitFunc(llvm::Function *Fn, const VarDecl *D);
1273
Anders Carlsson31ccf372009-05-03 17:47:16 +00001274 void EmitCXXConstructExpr(llvm::Value *Dest, const CXXConstructExpr *E);
Mike Stump1eb44332009-09-09 15:08:12 +00001275
Anders Carlssonb58d0172009-05-30 23:23:33 +00001276 RValue EmitCXXExprWithTemporaries(const CXXExprWithTemporaries *E,
Mike Stump1eb44332009-09-09 15:08:12 +00001277 llvm::Value *AggLoc = 0,
Anders Carlsson14c5cbf2009-08-16 07:36:22 +00001278 bool IsAggLocVolatile = false,
1279 bool IsInitializer = false);
Mike Stump1eb44332009-09-09 15:08:12 +00001280
Anders Carlsson756b5c42009-10-30 01:42:31 +00001281 void EmitCXXThrowExpr(const CXXThrowExpr *E);
Douglas Gregor1eb2e592010-05-16 00:44:00 +00001282
Daniel Dunbar0ffb1252008-08-04 16:51:22 +00001283 //===--------------------------------------------------------------------===//
1284 // Internal Helpers
1285 //===--------------------------------------------------------------------===//
Mike Stump0dd9e882009-02-08 23:14:22 +00001286
Chris Lattner0946ccd2008-11-11 07:41:27 +00001287 /// ContainsLabel - Return true if the statement contains a label in it. If
1288 /// this statement is not executed normally, it not containing a label means
1289 /// that we can just remove the code.
1290 static bool ContainsLabel(const Stmt *S, bool IgnoreCaseStmts = false);
Mike Stump0dd9e882009-02-08 23:14:22 +00001291
Daniel Dunbar4bc04552008-11-12 10:12:14 +00001292 /// ConstantFoldsToSimpleInteger - If the specified expression does not fold
Chris Lattner31a09842008-11-12 08:04:58 +00001293 /// to a constant, or if it does but contains a label, return 0. If it
1294 /// constant folds to 'true' and does not contain a label, return 1, if it
1295 /// constant folds to 'false' and does not contain a label, return -1.
1296 int ConstantFoldsToSimpleInteger(const Expr *Cond);
Mike Stump0dd9e882009-02-08 23:14:22 +00001297
Chris Lattner31a09842008-11-12 08:04:58 +00001298 /// EmitBranchOnBoolExpr - Emit a branch on a boolean condition (e.g. for an
1299 /// if statement) to the specified blocks. Based on the condition, this might
1300 /// try to simplify the codegen of the conditional based on the branch.
Chris Lattner9bc47e22008-11-12 07:46:33 +00001301 void EmitBranchOnBoolExpr(const Expr *Cond, llvm::BasicBlock *TrueBlock,
Daniel Dunbar4bc04552008-11-12 10:12:14 +00001302 llvm::BasicBlock *FalseBlock);
Mike Stumpbe07f602009-12-14 21:58:14 +00001303
Mike Stump15037ca2009-12-15 00:35:12 +00001304 /// getTrapBB - Create a basic block that will call the trap intrinsic. We'll
1305 /// generate a branch around the created basic block as necessary.
1306 llvm::BasicBlock* getTrapBB();
Anders Carlsson21c9ad92010-03-30 03:27:09 +00001307
1308 /// EmitCallArg - Emit a single call argument.
1309 RValue EmitCallArg(const Expr *E, QualType ArgType);
1310
John McCall27360712010-05-26 22:34:26 +00001311 /// EmitDelegateCallArg - We are performing a delegate call; that
1312 /// is, the current function is delegating to another one. Produce
1313 /// a r-value suitable for passing the given parameter.
1314 RValue EmitDelegateCallArg(const VarDecl *Param);
1315
Chris Lattner31a09842008-11-12 08:04:58 +00001316private:
Mike Stump0dd9e882009-02-08 23:14:22 +00001317
Daniel Dunbar29e0bcc2008-09-24 04:00:38 +00001318 void EmitReturnOfRValue(RValue RV, QualType Ty);
1319
Daniel Dunbar56273772008-09-17 00:51:38 +00001320 /// ExpandTypeFromArgs - Reconstruct a structure of type \arg Ty
1321 /// from function arguments into \arg Dst. See ABIArgInfo::Expand.
1322 ///
1323 /// \param AI - The first function argument of the expansion.
1324 /// \return The argument following the last expanded function
1325 /// argument.
Mike Stump0dd9e882009-02-08 23:14:22 +00001326 llvm::Function::arg_iterator
Daniel Dunbar56273772008-09-17 00:51:38 +00001327 ExpandTypeFromArgs(QualType Ty, LValue Dst,
1328 llvm::Function::arg_iterator AI);
1329
Mike Stump0dd9e882009-02-08 23:14:22 +00001330 /// ExpandTypeToArgs - Expand an RValue \arg Src, with the LLVM type for \arg
1331 /// Ty, into individual arguments on the provided vector \arg Args. See
1332 /// ABIArgInfo::Expand.
1333 void ExpandTypeToArgs(QualType Ty, RValue Src,
Daniel Dunbar56273772008-09-17 00:51:38 +00001334 llvm::SmallVector<llvm::Value*, 16> &Args);
Anders Carlssonc8c7b182009-01-11 19:40:10 +00001335
Mike Stump1eb44332009-09-09 15:08:12 +00001336 llvm::Value* EmitAsmInput(const AsmStmt &S,
Daniel Dunbarb84e8a62009-05-04 06:56:16 +00001337 const TargetInfo::ConstraintInfo &Info,
Anders Carlssonc8c7b182009-01-11 19:40:10 +00001338 const Expr *InputExpr, std::string &ConstraintStr);
Mike Stump0dd9e882009-02-08 23:14:22 +00001339
Anders Carlssonc71c8452009-02-07 23:50:39 +00001340 /// EmitCleanupBlock - emits a single cleanup block.
1341 void EmitCleanupBlock();
1342
Anders Carlsson87eaf172009-02-08 00:50:42 +00001343 /// AddBranchFixup - adds a branch instruction to the list of fixups for the
1344 /// current cleanup scope.
1345 void AddBranchFixup(llvm::BranchInst *BI);
Mike Stump0dd9e882009-02-08 23:14:22 +00001346
Anders Carlsson0139bb92009-04-08 20:47:54 +00001347 /// EmitCallArgs - Emit call arguments for a function.
Mike Stump1eb44332009-09-09 15:08:12 +00001348 /// The CallArgTypeInfo parameter is used for iterating over the known
Anders Carlssonaf23f692009-04-18 20:20:22 +00001349 /// argument types of the function being called.
1350 template<typename T>
1351 void EmitCallArgs(CallArgList& Args, const T* CallArgTypeInfo,
Anders Carlsson0139bb92009-04-08 20:47:54 +00001352 CallExpr::const_arg_iterator ArgBeg,
Anders Carlssonaf23f692009-04-18 20:20:22 +00001353 CallExpr::const_arg_iterator ArgEnd) {
1354 CallExpr::const_arg_iterator Arg = ArgBeg;
Anders Carlsson0139bb92009-04-08 20:47:54 +00001355
Anders Carlssonaf23f692009-04-18 20:20:22 +00001356 // First, use the argument types that the type info knows about
1357 if (CallArgTypeInfo) {
1358 for (typename T::arg_type_iterator I = CallArgTypeInfo->arg_type_begin(),
1359 E = CallArgTypeInfo->arg_type_end(); I != E; ++I, ++Arg) {
Eli Friedman44b0a3e2009-11-18 03:42:04 +00001360 assert(Arg != ArgEnd && "Running over edge of argument list!");
Anders Carlssonaf23f692009-04-18 20:20:22 +00001361 QualType ArgType = *I;
1362
1363 assert(getContext().getCanonicalType(ArgType.getNonReferenceType()).
Mike Stump1eb44332009-09-09 15:08:12 +00001364 getTypePtr() ==
1365 getContext().getCanonicalType(Arg->getType()).getTypePtr() &&
Anders Carlssonaf23f692009-04-18 20:20:22 +00001366 "type mismatch in call argument!");
Mike Stump1eb44332009-09-09 15:08:12 +00001367
1368 Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType),
Anders Carlssonaf23f692009-04-18 20:20:22 +00001369 ArgType));
1370 }
Mike Stump1eb44332009-09-09 15:08:12 +00001371
1372 // Either we've emitted all the call args, or we have a call to a
Anders Carlssonaf23f692009-04-18 20:20:22 +00001373 // variadic function.
Mike Stump1eb44332009-09-09 15:08:12 +00001374 assert((Arg == ArgEnd || CallArgTypeInfo->isVariadic()) &&
Anders Carlssonaf23f692009-04-18 20:20:22 +00001375 "Extra arguments in non-variadic function!");
Mike Stump1eb44332009-09-09 15:08:12 +00001376
Anders Carlssonaf23f692009-04-18 20:20:22 +00001377 }
Mike Stump1eb44332009-09-09 15:08:12 +00001378
Anders Carlssonaf23f692009-04-18 20:20:22 +00001379 // If we still have any arguments, emit them using the type of the argument.
1380 for (; Arg != ArgEnd; ++Arg) {
1381 QualType ArgType = Arg->getType();
1382 Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType),
1383 ArgType));
1384 }
1385 }
John McCall492c4f92010-03-03 04:15:11 +00001386
1387 const TargetCodeGenInfo &getTargetHooks() const {
1388 return CGM.getTargetCodeGenInfo();
1389 }
Reid Spencer5f016e22007-07-11 17:01:13 +00001390};
Mike Stump1eb44332009-09-09 15:08:12 +00001391
Anders Carlssonaf23f692009-04-18 20:20:22 +00001392
Reid Spencer5f016e22007-07-11 17:01:13 +00001393} // end namespace CodeGen
1394} // end namespace clang
1395
1396#endif