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Daniel Dunbar9c426522008-07-29 23:18:29 +00001//===-- CodeGenFunction.h - Per-Function state for LLVM CodeGen -*- C++ -*-===//
Chris Lattnerbed31442007-05-28 01:07:47 +00002//
3// The LLVM Compiler Infrastructure
4//
Chris Lattner5b12ab82007-12-29 19:59:25 +00005// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
Chris Lattnerbed31442007-05-28 01:07:47 +00007//
8//===----------------------------------------------------------------------===//
9//
Mike Stumpfc496822009-02-08 23:14:22 +000010// This is the internal per-function state used for llvm translation.
Chris Lattnerbed31442007-05-28 01:07:47 +000011//
12//===----------------------------------------------------------------------===//
13
Chris Lattnerc18bfbb2008-02-29 17:10:38 +000014#ifndef CLANG_CODEGEN_CODEGENFUNCTION_H
15#define CLANG_CODEGEN_CODEGENFUNCTION_H
Chris Lattnerbed31442007-05-28 01:07:47 +000016
Chris Lattner4bd55962008-03-30 23:03:07 +000017#include "clang/AST/Type.h"
Argyrios Kyrtzidis07052352008-09-10 02:36:38 +000018#include "clang/AST/ExprCXX.h"
Ted Kremenek08e17112008-06-17 02:43:46 +000019#include "clang/AST/ExprObjC.h"
Ken Dyck40775002010-01-11 17:06:35 +000020#include "clang/AST/CharUnits.h"
Chris Lattner2739d2b2009-03-31 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 Andersonae86c192009-07-13 04:10:07 +000025#include "CodeGenModule.h"
Mike Stumpedb252a2009-03-04 15:32:52 +000026#include "CGBlocks.h"
Daniel Dunbarcb463852008-11-01 01:53:16 +000027#include "CGBuilder.h"
Daniel Dunbar3d7c90b2008-09-08 21:33:45 +000028#include "CGCall.h"
Anders Carlssonb7f8f592009-04-17 00:06:03 +000029#include "CGCXX.h"
Daniel Dunbar97db84c2008-08-23 03:46:30 +000030#include "CGValue.h"
31
Chris Lattnerbed31442007-05-28 01:07:47 +000032namespace llvm {
Daniel Dunbar6e8aa532008-08-11 05:35:13 +000033 class BasicBlock;
Benjamin Kramer9cd050a2009-08-11 17:46:57 +000034 class LLVMContext;
David Chisnall9eecafa2010-05-01 11:15:56 +000035 class MDNode;
Chris Lattnerbed31442007-05-28 01:07:47 +000036 class Module;
Daniel Dunbar2efd5382008-09-30 01:06:03 +000037 class SwitchInst;
Daniel Dunbarb5aacc22009-10-19 01:21:05 +000038 class Twine;
Daniel Dunbar9b1335e2008-11-19 09:36:46 +000039 class Value;
Chris Lattner23b7eb62007-06-15 23:05:46 +000040}
41
Chris Lattnerbed31442007-05-28 01:07:47 +000042namespace clang {
43 class ASTContext;
Anders Carlsson0a637412009-05-29 21:03:38 +000044 class CXXDestructorDecl;
Anders Carlsson52d78a52009-09-27 18:58:34 +000045 class CXXTryStmt;
Chris Lattner84915fa2007-06-02 04:16:21 +000046 class Decl;
Daniel Dunbar6e8aa532008-08-11 05:35:13 +000047 class EnumConstantDecl;
Chris Lattnerbed31442007-05-28 01:07:47 +000048 class FunctionDecl;
Douglas Gregordeaad8c2009-02-26 23:50:07 +000049 class FunctionProtoType;
Daniel Dunbar6e8aa532008-08-11 05:35:13 +000050 class LabelStmt;
Fariborz Jahanian0196a1c2009-01-10 21:06:09 +000051 class ObjCContainerDecl;
Daniel Dunbar1c64e5d2008-09-24 04:00:38 +000052 class ObjCInterfaceDecl;
53 class ObjCIvarDecl;
Chris Lattner4bd55962008-03-30 23:03:07 +000054 class ObjCMethodDecl;
Fariborz Jahanian3d8552a2008-12-09 20:23:04 +000055 class ObjCImplementationDecl;
Daniel Dunbar89654ee2008-08-26 08:29:31 +000056 class ObjCPropertyImplDecl;
Chris Lattner2ccb73b2007-06-16 00:16:26 +000057 class TargetInfo;
John McCalld4f4b7f2010-03-03 04:15:11 +000058 class TargetCodeGenInfo;
Daniel Dunbar6e8aa532008-08-11 05:35:13 +000059 class VarDecl;
Chris Lattnerf0b64d72009-04-26 01:32:48 +000060 class ObjCForCollectionStmt;
61 class ObjCAtTryStmt;
62 class ObjCAtThrowStmt;
63 class ObjCAtSynchronizedStmt;
Devang Patel3e11cce2007-10-23 02:10:49 +000064
Chris Lattnerbed31442007-05-28 01:07:47 +000065namespace CodeGen {
Devang Patel3e11cce2007-10-23 02:10:49 +000066 class CodeGenTypes;
Anders Carlsson63784f42009-02-13 08:11:52 +000067 class CGDebugInfo;
Daniel Dunbar7633cbf2009-02-02 21:43:58 +000068 class CGFunctionInfo;
Mike Stumpfc496822009-02-08 23:14:22 +000069 class CGRecordLayout;
70
Chris Lattnerbed31442007-05-28 01:07:47 +000071/// CodeGenFunction - This class organizes the per-function state that is used
72/// while generating LLVM code.
Mike Stump95435672009-03-04 18:17:45 +000073class CodeGenFunction : public BlockFunction {
Anders Carlsson729a8202009-02-24 04:21:31 +000074 CodeGenFunction(const CodeGenFunction&); // DO NOT IMPLEMENT
75 void operator=(const CodeGenFunction&); // DO NOT IMPLEMENT
Chris Lattnerbda69f82007-08-26 23:13:56 +000076public:
Chris Lattnerbed31442007-05-28 01:07:47 +000077 CodeGenModule &CGM; // Per-module state.
Daniel Dunbar1b444192009-11-13 05:51:54 +000078 const TargetInfo &Target;
Mike Stumpfc496822009-02-08 23:14:22 +000079
Chris Lattner96d72562007-08-21 16:57:55 +000080 typedef std::pair<llvm::Value *, llvm::Value *> ComplexPairTy;
Daniel Dunbarcb463852008-11-01 01:53:16 +000081 CGBuilderTy Builder;
Mike Stumpfc496822009-02-08 23:14:22 +000082
Chris Lattner28ec0cf2009-04-23 05:30:27 +000083 /// CurFuncDecl - Holds the Decl for the current function or ObjC method.
84 /// This excludes BlockDecls.
Chris Lattner5696e7b2008-06-17 18:05:57 +000085 const Decl *CurFuncDecl;
Chris Lattner28ec0cf2009-04-23 05:30:27 +000086 /// CurCodeDecl - This is the inner-most code context, which includes blocks.
87 const Decl *CurCodeDecl;
Daniel Dunbard931a872009-02-02 22:03:45 +000088 const CGFunctionInfo *CurFnInfo;
Chris Lattner4bd55962008-03-30 23:03:07 +000089 QualType FnRetTy;
Chris Lattnerac248202007-05-30 00:13:02 +000090 llvm::Function *CurFn;
91
Mike Stumpbee78dd2009-12-04 23:26:17 +000092 /// CurGD - The GlobalDecl for the current function being compiled.
93 GlobalDecl CurGD;
Mike Stumpbee78dd2009-12-04 23:26:17 +000094
Daniel Dunbar54bb1932008-09-09 21:00:17 +000095 /// ReturnBlock - Unified return block.
96 llvm::BasicBlock *ReturnBlock;
Mike Stumpfc496822009-02-08 23:14:22 +000097 /// ReturnValue - The temporary alloca to hold the return value. This is null
98 /// iff the function has no return value.
Eli Friedman4b1942c2009-12-04 02:43:40 +000099 llvm::Value *ReturnValue;
Mike Stumpfc496822009-02-08 23:14:22 +0000100
Chris Lattner03df1222007-06-02 04:53:11 +0000101 /// AllocaInsertPoint - This is an instruction in the entry block before which
102 /// we prefer to insert allocas.
Chris Lattner2739d2b2009-03-31 22:17:44 +0000103 llvm::AssertingVH<llvm::Instruction> AllocaInsertPt;
Daniel Dunbar88402ce2008-08-04 16:51:22 +0000104
Chris Lattner6db1fb82007-06-02 22:49:07 +0000105 const llvm::Type *LLVMIntTy;
Hartmut Kaiser7078da82007-10-17 15:00:17 +0000106 uint32_t LLVMPointerWidth;
Daniel Dunbard3dcb4f82008-09-28 01:03:14 +0000107
Mike Stumpaff69af2009-12-09 03:35:49 +0000108 bool Exceptions;
Mike Stumpd9546382009-12-12 01:27:46 +0000109 bool CatchUndefined;
Douglas Gregor9154b5d2010-05-17 15:52:46 +0000110
111 /// \brief A mapping from NRVO variables to the flags used to indicate
112 /// when the NRVO has been applied to this variable.
113 llvm::DenseMap<const VarDecl *, llvm::Value *> NRVOFlags;
114
Daniel Dunbard3dcb4f82008-09-28 01:03:14 +0000115public:
Anders Carlsson33c1b652009-02-10 06:07:49 +0000116 /// ObjCEHValueStack - Stack of Objective-C exception values, used for
117 /// rethrows.
Anders Carlssonbf8a1be2009-02-07 21:37:21 +0000118 llvm::SmallVector<llvm::Value*, 8> ObjCEHValueStack;
Mike Stumpfc496822009-02-08 23:14:22 +0000119
Anders Carlssona586ad72009-02-08 03:22:36 +0000120 /// PushCleanupBlock - Push a new cleanup entry on the stack and set the
121 /// passed in block as the cleanup block.
Fariborz Jahanian09cc10f2009-11-04 17:57:40 +0000122 void PushCleanupBlock(llvm::BasicBlock *CleanupEntryBlock,
Mike Stumpaff69af2009-12-09 03:35:49 +0000123 llvm::BasicBlock *CleanupExitBlock,
124 llvm::BasicBlock *PreviousInvokeDest,
Mike Stump33270212009-12-02 07:41:41 +0000125 bool EHOnly = false);
Mike Stumpaff69af2009-12-09 03:35:49 +0000126 void PushCleanupBlock(llvm::BasicBlock *CleanupEntryBlock) {
127 PushCleanupBlock(CleanupEntryBlock, 0, getInvokeDest(), false);
128 }
Anders Carlsson66c384a2009-02-08 07:46:24 +0000129
Mike Stumpfc496822009-02-08 23:14:22 +0000130 /// CleanupBlockInfo - A struct representing a popped cleanup block.
Anders Carlsson66c384a2009-02-08 07:46:24 +0000131 struct CleanupBlockInfo {
Fariborz Jahanian09cc10f2009-11-04 17:57:40 +0000132 /// CleanupEntryBlock - the cleanup entry block
Anders Carlsson66c384a2009-02-08 07:46:24 +0000133 llvm::BasicBlock *CleanupBlock;
Mike Stumpfc496822009-02-08 23:14:22 +0000134
135 /// SwitchBlock - the block (if any) containing the switch instruction used
136 /// for jumping to the final destination.
Anders Carlsson66c384a2009-02-08 07:46:24 +0000137 llvm::BasicBlock *SwitchBlock;
Mike Stumpfc496822009-02-08 23:14:22 +0000138
Anders Carlsson66c384a2009-02-08 07:46:24 +0000139 /// EndBlock - the default destination for the switch instruction.
140 llvm::BasicBlock *EndBlock;
Mike Stumpfc496822009-02-08 23:14:22 +0000141
Mike Stump33270212009-12-02 07:41:41 +0000142 /// EHOnly - True iff this cleanup should only be performed on the
143 /// exceptional edge.
144 bool EHOnly;
145
Mike Stumpfc496822009-02-08 23:14:22 +0000146 CleanupBlockInfo(llvm::BasicBlock *cb, llvm::BasicBlock *sb,
Mike Stump33270212009-12-02 07:41:41 +0000147 llvm::BasicBlock *eb, bool ehonly = false)
148 : CleanupBlock(cb), SwitchBlock(sb), EndBlock(eb), EHOnly(ehonly) {}
Anders Carlsson66c384a2009-02-08 07:46:24 +0000149 };
150
Mike Stumpaff69af2009-12-09 03:35:49 +0000151 /// EHCleanupBlock - RAII object that will create a cleanup block for the
152 /// exceptional edge and set the insert point to that block. When destroyed,
153 /// it creates the cleanup edge and sets the insert point to the previous
154 /// block.
155 class EHCleanupBlock {
156 CodeGenFunction& CGF;
John McCall21886962010-04-21 10:05:39 +0000157 llvm::BasicBlock *PreviousInsertionBlock;
Mike Stumpaff69af2009-12-09 03:35:49 +0000158 llvm::BasicBlock *CleanupHandler;
Mike Stumpaff69af2009-12-09 03:35:49 +0000159 llvm::BasicBlock *PreviousInvokeDest;
160 public:
161 EHCleanupBlock(CodeGenFunction &cgf)
John McCall21886962010-04-21 10:05:39 +0000162 : CGF(cgf),
163 PreviousInsertionBlock(CGF.Builder.GetInsertBlock()),
164 CleanupHandler(CGF.createBasicBlock("ehcleanup", CGF.CurFn)),
Mike Stumpaff69af2009-12-09 03:35:49 +0000165 PreviousInvokeDest(CGF.getInvokeDest()) {
Mike Stump10253072009-12-09 23:49:53 +0000166 llvm::BasicBlock *TerminateHandler = CGF.getTerminateHandler();
John McCall21886962010-04-21 10:05:39 +0000167 CGF.Builder.SetInsertPoint(CleanupHandler);
Mike Stump10253072009-12-09 23:49:53 +0000168 CGF.setInvokeDest(TerminateHandler);
Mike Stumpaff69af2009-12-09 03:35:49 +0000169 }
170 ~EHCleanupBlock();
171 };
172
Anders Carlsson66c384a2009-02-08 07:46:24 +0000173 /// PopCleanupBlock - Will pop the cleanup entry on the stack, process all
Mike Stumpfc496822009-02-08 23:14:22 +0000174 /// branch fixups and return a block info struct with the switch block and end
Mike Stumpaff69af2009-12-09 03:35:49 +0000175 /// block. This will also reset the invoke handler to the previous value
176 /// from when the cleanup block was created.
Anders Carlsson66c384a2009-02-08 07:46:24 +0000177 CleanupBlockInfo PopCleanupBlock();
Mike Stumpfc496822009-02-08 23:14:22 +0000178
Mike Stumpe5311b02009-11-30 20:08:49 +0000179 /// DelayedCleanupBlock - RAII object that will create a cleanup block and set
180 /// the insert point to that block. When destructed, it sets the insert point
181 /// to the previous block and pushes a new cleanup entry on the stack.
Douglas Gregor48a409e2009-11-24 16:21:10 +0000182 class DelayedCleanupBlock {
Anders Carlsson2cf8c442009-02-07 23:30:41 +0000183 CodeGenFunction& CGF;
184 llvm::BasicBlock *CurBB;
Fariborz Jahanian09cc10f2009-11-04 17:57:40 +0000185 llvm::BasicBlock *CleanupEntryBB;
186 llvm::BasicBlock *CleanupExitBB;
Mike Stumpaff69af2009-12-09 03:35:49 +0000187 llvm::BasicBlock *CurInvokeDest;
Mike Stump33270212009-12-02 07:41:41 +0000188 bool EHOnly;
Fariborz Jahanian09cc10f2009-11-04 17:57:40 +0000189
Anders Carlsson2cf8c442009-02-07 23:30:41 +0000190 public:
Mike Stump33270212009-12-02 07:41:41 +0000191 DelayedCleanupBlock(CodeGenFunction &cgf, bool ehonly = false)
Fariborz Jahanian09cc10f2009-11-04 17:57:40 +0000192 : CGF(cgf), CurBB(CGF.Builder.GetInsertBlock()),
John McCallbf814c72010-04-21 11:18:06 +0000193 CleanupEntryBB(CGF.createBasicBlock("cleanup")),
194 CleanupExitBB(0),
Mike Stumpaff69af2009-12-09 03:35:49 +0000195 CurInvokeDest(CGF.getInvokeDest()),
196 EHOnly(ehonly) {
Fariborz Jahanian09cc10f2009-11-04 17:57:40 +0000197 CGF.Builder.SetInsertPoint(CleanupEntryBB);
Anders Carlsson2cf8c442009-02-07 23:30:41 +0000198 }
Mike Stumpfc496822009-02-08 23:14:22 +0000199
Fariborz Jahanian09cc10f2009-11-04 17:57:40 +0000200 llvm::BasicBlock *getCleanupExitBlock() {
201 if (!CleanupExitBB)
202 CleanupExitBB = CGF.createBasicBlock("cleanup.exit");
203 return CleanupExitBB;
204 }
205
Douglas Gregor48a409e2009-11-24 16:21:10 +0000206 ~DelayedCleanupBlock() {
Mike Stumpaff69af2009-12-09 03:35:49 +0000207 CGF.PushCleanupBlock(CleanupEntryBB, CleanupExitBB, CurInvokeDest,
208 EHOnly);
Daniel Dunbarb6adc432009-07-19 06:58:07 +0000209 // FIXME: This is silly, move this into the builder.
210 if (CurBB)
211 CGF.Builder.SetInsertPoint(CurBB);
212 else
213 CGF.Builder.ClearInsertionPoint();
Anders Carlsson2cf8c442009-02-07 23:30:41 +0000214 }
215 };
216
Douglas Gregor965f4502009-11-24 16:43:22 +0000217 /// \brief Enters a new scope for capturing cleanups, all of which will be
218 /// executed once the scope is exited.
219 class CleanupScope {
220 CodeGenFunction& CGF;
221 size_t CleanupStackDepth;
222 bool OldDidCallStackSave;
Douglas Gregor680f8612009-11-24 21:15:44 +0000223 bool PerformCleanup;
Douglas Gregor965f4502009-11-24 16:43:22 +0000224
225 CleanupScope(const CleanupScope &); // DO NOT IMPLEMENT
226 CleanupScope &operator=(const CleanupScope &); // DO NOT IMPLEMENT
227
228 public:
229 /// \brief Enter a new cleanup scope.
Douglas Gregor680f8612009-11-24 21:15:44 +0000230 explicit CleanupScope(CodeGenFunction &CGF)
231 : CGF(CGF), PerformCleanup(true)
232 {
Douglas Gregor965f4502009-11-24 16:43:22 +0000233 CleanupStackDepth = CGF.CleanupEntries.size();
234 OldDidCallStackSave = CGF.DidCallStackSave;
235 }
236
237 /// \brief Exit this cleanup scope, emitting any accumulated
238 /// cleanups.
239 ~CleanupScope() {
Douglas Gregor680f8612009-11-24 21:15:44 +0000240 if (PerformCleanup) {
241 CGF.DidCallStackSave = OldDidCallStackSave;
242 CGF.EmitCleanupBlocks(CleanupStackDepth);
243 }
244 }
245
246 /// \brief Determine whether this scope requires any cleanups.
247 bool requiresCleanups() const {
248 return CGF.CleanupEntries.size() > CleanupStackDepth;
249 }
250
251 /// \brief Force the emission of cleanups now, instead of waiting
252 /// until this object is destroyed.
253 void ForceCleanup() {
254 assert(PerformCleanup && "Already forced cleanup");
Douglas Gregor965f4502009-11-24 16:43:22 +0000255 CGF.DidCallStackSave = OldDidCallStackSave;
256 CGF.EmitCleanupBlocks(CleanupStackDepth);
Douglas Gregor680f8612009-11-24 21:15:44 +0000257 PerformCleanup = false;
Douglas Gregor965f4502009-11-24 16:43:22 +0000258 }
259 };
260
Anders Carlssonb9fd57f2010-03-30 03:14:41 +0000261 /// CXXTemporariesCleanupScope - Enters a new scope for catching live
262 /// temporaries, all of which will be popped once the scope is exited.
263 class CXXTemporariesCleanupScope {
264 CodeGenFunction &CGF;
265 size_t NumLiveTemporaries;
266
267 // DO NOT IMPLEMENT
268 CXXTemporariesCleanupScope(const CXXTemporariesCleanupScope &);
269 CXXTemporariesCleanupScope &operator=(const CXXTemporariesCleanupScope &);
270
271 public:
272 explicit CXXTemporariesCleanupScope(CodeGenFunction &CGF)
273 : CGF(CGF), NumLiveTemporaries(CGF.LiveTemporaries.size()) { }
274
275 ~CXXTemporariesCleanupScope() {
276 while (CGF.LiveTemporaries.size() > NumLiveTemporaries)
277 CGF.PopCXXTemporary();
278 }
279 };
280
281
Anders Carlssonbe0f76a2009-02-07 23:50:39 +0000282 /// EmitCleanupBlocks - Takes the old cleanup stack size and emits the cleanup
283 /// blocks that have been added.
284 void EmitCleanupBlocks(size_t OldCleanupStackSize);
285
Anders Carlsson7d70fd22009-02-08 00:50:42 +0000286 /// EmitBranchThroughCleanup - Emit a branch from the current insert block
287 /// through the cleanup handling code (if any) and then on to \arg Dest.
288 ///
Mike Stumpfc496822009-02-08 23:14:22 +0000289 /// FIXME: Maybe this should really be in EmitBranch? Don't we always want
Anders Carlsson7d70fd22009-02-08 00:50:42 +0000290 /// this behavior for branches?
291 void EmitBranchThroughCleanup(llvm::BasicBlock *Dest);
Mike Stumpfc496822009-02-08 23:14:22 +0000292
Anders Carlssonae612d22010-02-04 17:18:07 +0000293 /// BeginConditionalBranch - Should be called before a conditional part of an
Anders Carlsson0a66c262009-11-20 17:27:56 +0000294 /// expression is emitted. For example, before the RHS of the expression below
295 /// is emitted:
Mike Stump11289f42009-09-09 15:08:12 +0000296 ///
Anders Carlsson44bfcf02009-06-04 02:22:12 +0000297 /// b && f(T());
298 ///
Anders Carlsson0a66c262009-11-20 17:27:56 +0000299 /// This is used to make sure that any temporaries created in the conditional
Anders Carlsson44bfcf02009-06-04 02:22:12 +0000300 /// branch are only destroyed if the branch is taken.
Anders Carlssonae612d22010-02-04 17:18:07 +0000301 void BeginConditionalBranch() {
Anders Carlsson0a66c262009-11-20 17:27:56 +0000302 ++ConditionalBranchLevel;
303 }
Mike Stump11289f42009-09-09 15:08:12 +0000304
Anders Carlssonae612d22010-02-04 17:18:07 +0000305 /// EndConditionalBranch - Should be called after a conditional part of an
Anders Carlsson0a66c262009-11-20 17:27:56 +0000306 /// expression has been emitted.
Anders Carlssonae612d22010-02-04 17:18:07 +0000307 void EndConditionalBranch() {
Anders Carlsson60ddba62010-01-24 00:20:05 +0000308 assert(ConditionalBranchLevel != 0 &&
309 "Conditional branch mismatch!");
310
Anders Carlsson0a66c262009-11-20 17:27:56 +0000311 --ConditionalBranchLevel;
312 }
Mike Stump11289f42009-09-09 15:08:12 +0000313
Chris Lattner2da04b32007-08-24 05:35:26 +0000314private:
Chris Lattner6c4d2552009-10-28 23:59:40 +0000315 CGDebugInfo *DebugInfo;
Mike Stumpc6ea7c12009-02-17 17:00:02 +0000316
Mike Stumpe5311b02009-11-30 20:08:49 +0000317 /// IndirectBranch - The first time an indirect goto is seen we create a block
318 /// with an indirect branch. Every time we see the address of a label taken,
319 /// we add the label to the indirect goto. Every subsequent indirect goto is
320 /// codegen'd as a jump to the IndirectBranch's basic block.
Chris Lattner6c4d2552009-10-28 23:59:40 +0000321 llvm::IndirectBrInst *IndirectBranch;
Daniel Dunbar88402ce2008-08-04 16:51:22 +0000322
Mike Stumpfc496822009-02-08 23:14:22 +0000323 /// LocalDeclMap - This keeps track of the LLVM allocas or globals for local C
324 /// decls.
Chris Lattner23b7eb62007-06-15 23:05:46 +0000325 llvm::DenseMap<const Decl*, llvm::Value*> LocalDeclMap;
Chris Lattner84915fa2007-06-02 04:16:21 +0000326
Chris Lattnerac248202007-05-30 00:13:02 +0000327 /// LabelMap - This keeps track of the LLVM basic block for each C label.
Chris Lattner23b7eb62007-06-15 23:05:46 +0000328 llvm::DenseMap<const LabelStmt*, llvm::BasicBlock*> LabelMap;
Mike Stumpfc496822009-02-08 23:14:22 +0000329
Mike Stumpfc496822009-02-08 23:14:22 +0000330 // BreakContinueStack - This keeps track of where break and continue
Anders Carlsson33747b62009-02-10 05:52:02 +0000331 // statements should jump to.
Chris Lattnere73e4322007-07-16 21:28:45 +0000332 struct BreakContinue {
Anders Carlsson33747b62009-02-10 05:52:02 +0000333 BreakContinue(llvm::BasicBlock *bb, llvm::BasicBlock *cb)
334 : BreakBlock(bb), ContinueBlock(cb) {}
Mike Stumpfc496822009-02-08 23:14:22 +0000335
Chris Lattnere73e4322007-07-16 21:28:45 +0000336 llvm::BasicBlock *BreakBlock;
337 llvm::BasicBlock *ContinueBlock;
Mike Stumpfc496822009-02-08 23:14:22 +0000338 };
Chris Lattnere73e4322007-07-16 21:28:45 +0000339 llvm::SmallVector<BreakContinue, 8> BreakContinueStack;
Daniel Dunbard3dcb4f82008-09-28 01:03:14 +0000340
Mike Stumpfc496822009-02-08 23:14:22 +0000341 /// SwitchInsn - This is nearest current switch instruction. It is null if if
342 /// current context is not in a switch.
Devang Patelda5d6bb2007-10-04 23:45:31 +0000343 llvm::SwitchInst *SwitchInsn;
344
Mike Stumpfc496822009-02-08 23:14:22 +0000345 /// CaseRangeBlock - This block holds if condition check for last case
Devang Patel49a44f32007-10-09 17:08:50 +0000346 /// statement range in current switch instruction.
Devang Patel11663122007-10-08 20:57:48 +0000347 llvm::BasicBlock *CaseRangeBlock;
348
Daniel Dunbar12347492009-02-23 17:26:39 +0000349 /// InvokeDest - This is the nearest exception target for calls
350 /// which can unwind, when exceptions are being used.
351 llvm::BasicBlock *InvokeDest;
352
Mike Stumpfc496822009-02-08 23:14:22 +0000353 // VLASizeMap - This keeps track of the associated size for each VLA type.
Eli Friedman04fddf02009-08-15 02:50:32 +0000354 // We track this by the size expression rather than the type itself because
355 // in certain situations, like a const qualifier applied to an VLA typedef,
356 // multiple VLA types can share the same size expression.
Mike Stumpfc496822009-02-08 23:14:22 +0000357 // FIXME: Maybe this could be a stack of maps that is pushed/popped as we
358 // enter/leave scopes.
Eli Friedman04fddf02009-08-15 02:50:32 +0000359 llvm::DenseMap<const Expr*, llvm::Value*> VLASizeMap;
Mike Stumpfc496822009-02-08 23:14:22 +0000360
Anders Carlssonf4478e92009-02-09 20:20:56 +0000361 /// DidCallStackSave - Whether llvm.stacksave has been called. Used to avoid
362 /// calling llvm.stacksave for multiple VLAs in the same scope.
363 bool DidCallStackSave;
Mike Stumpc6ea7c12009-02-17 17:00:02 +0000364
Anders Carlsson15cb75a2009-02-07 22:53:43 +0000365 struct CleanupEntry {
Fariborz Jahanian09cc10f2009-11-04 17:57:40 +0000366 /// CleanupEntryBlock - The block of code that does the actual cleanup.
367 llvm::BasicBlock *CleanupEntryBlock;
Mike Stumpfc496822009-02-08 23:14:22 +0000368
Fariborz Jahanian09cc10f2009-11-04 17:57:40 +0000369 /// CleanupExitBlock - The cleanup exit block.
370 llvm::BasicBlock *CleanupExitBlock;
371
Anders Carlsson15cb75a2009-02-07 22:53:43 +0000372 /// Blocks - Basic blocks that were emitted in the current cleanup scope.
Anders Carlsson66c384a2009-02-08 07:46:24 +0000373 std::vector<llvm::BasicBlock *> Blocks;
Anders Carlsson15cb75a2009-02-07 22:53:43 +0000374
375 /// BranchFixups - Branch instructions to basic blocks that haven't been
376 /// inserted into the current function yet.
Anders Carlsson66c384a2009-02-08 07:46:24 +0000377 std::vector<llvm::BranchInst *> BranchFixups;
Anders Carlsson15cb75a2009-02-07 22:53:43 +0000378
Mike Stumpaff69af2009-12-09 03:35:49 +0000379 /// PreviousInvokeDest - The invoke handler from the start of the cleanup
380 /// region.
381 llvm::BasicBlock *PreviousInvokeDest;
382
Mike Stump33270212009-12-02 07:41:41 +0000383 /// EHOnly - Perform this only on the exceptional edge, not the main edge.
384 bool EHOnly;
385
Fariborz Jahanian09cc10f2009-11-04 17:57:40 +0000386 explicit CleanupEntry(llvm::BasicBlock *CleanupEntryBlock,
Mike Stumpaff69af2009-12-09 03:35:49 +0000387 llvm::BasicBlock *CleanupExitBlock,
388 llvm::BasicBlock *PreviousInvokeDest,
389 bool ehonly)
390 : CleanupEntryBlock(CleanupEntryBlock),
Mike Stump33270212009-12-02 07:41:41 +0000391 CleanupExitBlock(CleanupExitBlock),
Mike Stumpaff69af2009-12-09 03:35:49 +0000392 PreviousInvokeDest(PreviousInvokeDest),
Mike Stump33270212009-12-02 07:41:41 +0000393 EHOnly(ehonly) {}
Anders Carlsson15cb75a2009-02-07 22:53:43 +0000394 };
Mike Stumpfc496822009-02-08 23:14:22 +0000395
Anders Carlsson15cb75a2009-02-07 22:53:43 +0000396 /// CleanupEntries - Stack of cleanup entries.
397 llvm::SmallVector<CleanupEntry, 8> CleanupEntries;
398
Anders Carlssonfbfb5e62009-02-08 00:16:35 +0000399 typedef llvm::DenseMap<llvm::BasicBlock*, size_t> BlockScopeMap;
400
401 /// BlockScopes - Map of which "cleanup scope" scope basic blocks have.
402 BlockScopeMap BlockScopes;
Mike Stumpfc496822009-02-08 23:14:22 +0000403
Anders Carlsson82ba57c2009-11-25 03:15:49 +0000404 /// CXXThisDecl - When generating code for a C++ member function,
405 /// this will hold the implicit 'this' declaration.
Anders Carlsson468fa632009-04-04 20:47:02 +0000406 ImplicitParamDecl *CXXThisDecl;
John McCall347132b2010-02-16 22:04:33 +0000407 llvm::Value *CXXThisValue;
Mike Stump11289f42009-09-09 15:08:12 +0000408
Anders Carlsson82ba57c2009-11-25 03:15:49 +0000409 /// CXXVTTDecl - When generating code for a base object constructor or
410 /// base object destructor with virtual bases, this will hold the implicit
411 /// VTT parameter.
412 ImplicitParamDecl *CXXVTTDecl;
John McCall347132b2010-02-16 22:04:33 +0000413 llvm::Value *CXXVTTValue;
Anders Carlsson82ba57c2009-11-25 03:15:49 +0000414
Anders Carlsson6d363432009-06-03 18:54:26 +0000415 /// CXXLiveTemporaryInfo - Holds information about a live C++ temporary.
416 struct CXXLiveTemporaryInfo {
417 /// Temporary - The live temporary.
418 const CXXTemporary *Temporary;
Mike Stump11289f42009-09-09 15:08:12 +0000419
Anders Carlsson6d363432009-06-03 18:54:26 +0000420 /// ThisPtr - The pointer to the temporary.
421 llvm::Value *ThisPtr;
Mike Stump11289f42009-09-09 15:08:12 +0000422
Anders Carlsson6d363432009-06-03 18:54:26 +0000423 /// DtorBlock - The destructor block.
424 llvm::BasicBlock *DtorBlock;
Mike Stump11289f42009-09-09 15:08:12 +0000425
Mike Stumpe5311b02009-11-30 20:08:49 +0000426 /// CondPtr - If this is a conditional temporary, this is the pointer to the
427 /// condition variable that states whether the destructor should be called
428 /// or not.
Anders Carlsson6d363432009-06-03 18:54:26 +0000429 llvm::Value *CondPtr;
Mike Stump11289f42009-09-09 15:08:12 +0000430
Anders Carlsson6d363432009-06-03 18:54:26 +0000431 CXXLiveTemporaryInfo(const CXXTemporary *temporary,
Anders Carlsson4c49bb92009-06-03 19:05:16 +0000432 llvm::Value *thisptr, llvm::BasicBlock *dtorblock,
433 llvm::Value *condptr)
Mike Stump11289f42009-09-09 15:08:12 +0000434 : Temporary(temporary), ThisPtr(thisptr), DtorBlock(dtorblock),
Anders Carlsson6d363432009-06-03 18:54:26 +0000435 CondPtr(condptr) { }
436 };
Mike Stump11289f42009-09-09 15:08:12 +0000437
Anders Carlsson6d363432009-06-03 18:54:26 +0000438 llvm::SmallVector<CXXLiveTemporaryInfo, 4> LiveTemporaries;
Anders Carlsson44bfcf02009-06-04 02:22:12 +0000439
Anders Carlsson0a66c262009-11-20 17:27:56 +0000440 /// ConditionalBranchLevel - Contains the nesting level of the current
441 /// conditional branch. This is used so that we know if a temporary should be
442 /// destroyed conditionally.
443 unsigned ConditionalBranchLevel;
Mike Stump11289f42009-09-09 15:08:12 +0000444
Anders Carlsson0168f4b2009-09-12 02:14:24 +0000445
446 /// ByrefValueInfoMap - For each __block variable, contains a pair of the LLVM
447 /// type as well as the field number that contains the actual data.
448 llvm::DenseMap<const ValueDecl *, std::pair<const llvm::Type *,
449 unsigned> > ByRefValueInfo;
450
451 /// getByrefValueFieldNumber - Given a declaration, returns the LLVM field
452 /// number that holds the value.
453 unsigned getByRefValueLLVMField(const ValueDecl *VD) const;
Mike Stumpf5cbb082009-12-10 00:02:42 +0000454
455 llvm::BasicBlock *TerminateHandler;
Mike Stumpe8c3b3e2009-12-15 00:35:12 +0000456 llvm::BasicBlock *TrapBB;
Eli Friedmand5bc94e2009-12-10 02:21:21 +0000457
458 int UniqueAggrDestructorCount;
Chris Lattnerbed31442007-05-28 01:07:47 +0000459public:
Chris Lattnerd1af2d22007-05-29 23:17:50 +0000460 CodeGenFunction(CodeGenModule &cgm);
Mike Stumpfc496822009-02-08 23:14:22 +0000461
Chris Lattner6db1fb82007-06-02 22:49:07 +0000462 ASTContext &getContext() const;
Anders Carlsson63784f42009-02-13 08:11:52 +0000463 CGDebugInfo *getDebugInfo() { return DebugInfo; }
Chris Lattner6db1fb82007-06-02 22:49:07 +0000464
Daniel Dunbar12347492009-02-23 17:26:39 +0000465 llvm::BasicBlock *getInvokeDest() { return InvokeDest; }
466 void setInvokeDest(llvm::BasicBlock *B) { InvokeDest = B; }
467
Owen Anderson170229f2009-07-14 23:10:40 +0000468 llvm::LLVMContext &getLLVMContext() { return VMContext; }
Owen Andersonae86c192009-07-13 04:10:07 +0000469
Daniel Dunbar12347492009-02-23 17:26:39 +0000470 //===--------------------------------------------------------------------===//
471 // Objective-C
472 //===--------------------------------------------------------------------===//
473
Chris Lattner4bd55962008-03-30 23:03:07 +0000474 void GenerateObjCMethod(const ObjCMethodDecl *OMD);
Daniel Dunbar89654ee2008-08-26 08:29:31 +0000475
Mike Stumpfc496822009-02-08 23:14:22 +0000476 void StartObjCMethod(const ObjCMethodDecl *MD,
Fariborz Jahanian0196a1c2009-01-10 21:06:09 +0000477 const ObjCContainerDecl *CD);
Daniel Dunbar89654ee2008-08-26 08:29:31 +0000478
Mike Stumpfc496822009-02-08 23:14:22 +0000479 /// GenerateObjCGetter - Synthesize an Objective-C property getter function.
Fariborz Jahanian3d8552a2008-12-09 20:23:04 +0000480 void GenerateObjCGetter(ObjCImplementationDecl *IMP,
481 const ObjCPropertyImplDecl *PID);
Fariborz Jahanian0dec1e02010-04-28 21:28:56 +0000482 void GenerateObjCCtorDtorMethod(ObjCImplementationDecl *IMP,
483 ObjCMethodDecl *MD, bool ctor);
Daniel Dunbar89654ee2008-08-26 08:29:31 +0000484
Mike Stumpfc496822009-02-08 23:14:22 +0000485 /// GenerateObjCSetter - Synthesize an Objective-C property setter function
486 /// for the given property.
Fariborz Jahanian3d8552a2008-12-09 20:23:04 +0000487 void GenerateObjCSetter(ObjCImplementationDecl *IMP,
488 const ObjCPropertyImplDecl *PID);
Fariborz Jahanian08b0f662010-04-13 00:38:05 +0000489 bool IndirectObjCSetterArg(const CGFunctionInfo &FI);
Fariborz Jahanian7e9d52a2010-04-13 18:32:24 +0000490 bool IvarTypeWithAggrGCObjects(QualType Ty);
Daniel Dunbar89654ee2008-08-26 08:29:31 +0000491
Mike Stumpcb2fbcb2009-02-21 20:00:35 +0000492 //===--------------------------------------------------------------------===//
493 // Block Bits
494 //===--------------------------------------------------------------------===//
495
Mike Stumpb750d922009-02-25 23:33:13 +0000496 llvm::Value *BuildBlockLiteralTmp(const BlockExpr *);
Blaine Garstfc83aa02010-02-23 21:51:17 +0000497 llvm::Constant *BuildDescriptorBlockDecl(const BlockExpr *,
498 bool BlockHasCopyDispose,
Ken Dyck40775002010-01-11 17:06:35 +0000499 CharUnits Size,
Mike Stumpaeb0ffd2009-03-07 02:35:30 +0000500 const llvm::StructType *,
501 std::vector<HelperInfo> *);
Mike Stumpcb2fbcb2009-02-21 20:00:35 +0000502
Chris Lattner3385fe122009-02-28 19:01:03 +0000503 llvm::Function *GenerateBlockFunction(const BlockExpr *BExpr,
Mike Stumpcb2fbcb2009-02-21 20:00:35 +0000504 const BlockInfo& Info,
Mike Stump692c6e32009-03-20 21:53:12 +0000505 const Decl *OuterFuncDecl,
Mike Stump5469f292009-03-13 23:34:28 +0000506 llvm::DenseMap<const Decl*, llvm::Value*> ldm,
Ken Dyck5262b112010-01-26 19:13:33 +0000507 CharUnits &Size, CharUnits &Align,
John McCall87fe5d52010-05-20 01:18:31 +0000508 llvm::SmallVectorImpl<const Expr*> &subBlockDeclRefDecls,
Mike Stump4446dcf2009-03-05 08:32:30 +0000509 bool &subBlockHasCopyDispose);
Mike Stumpcb2fbcb2009-02-21 20:00:35 +0000510
Mike Stump692c6e32009-03-20 21:53:12 +0000511 void BlockForwardSelf();
Mike Stumpcb2fbcb2009-02-21 20:00:35 +0000512 llvm::Value *LoadBlockStruct();
513
John McCall87fe5d52010-05-20 01:18:31 +0000514 void AllocateBlockCXXThisPointer(const CXXThisExpr *E);
515 void AllocateBlockDecl(const BlockDeclRefExpr *E);
Mike Stump1db7d042009-02-28 09:07:16 +0000516 llvm::Value *GetAddrOfBlockDecl(const BlockDeclRefExpr *E);
Anders Carlsson71d1d922009-09-09 02:51:03 +0000517 const llvm::Type *BuildByRefType(const ValueDecl *D);
Mike Stump97d01d52009-03-04 03:23:46 +0000518
Anders Carlsson73fcc952009-09-11 00:07:24 +0000519 void GenerateCode(GlobalDecl GD, llvm::Function *Fn);
520 void StartFunction(GlobalDecl GD, QualType RetTy,
Daniel Dunbarbc915f42008-09-09 23:14:03 +0000521 llvm::Function *Fn,
Daniel Dunbar354d2782008-10-18 18:22:23 +0000522 const FunctionArgList &Args,
523 SourceLocation StartLoc);
Daniel Dunbar5c7e3932008-11-11 23:11:34 +0000524
John McCallb81884d2010-02-19 09:25:03 +0000525 void EmitConstructorBody(FunctionArgList &Args);
526 void EmitDestructorBody(FunctionArgList &Args);
527 void EmitFunctionBody(FunctionArgList &Args);
John McCall89b12b32010-02-18 03:17:58 +0000528
Mike Stumpfc496822009-02-08 23:14:22 +0000529 /// EmitReturnBlock - Emit the unified return block, trying to avoid its
530 /// emission when possible.
Daniel Dunbarfd346a32009-01-26 23:27:52 +0000531 void EmitReturnBlock();
532
Mike Stumpfc496822009-02-08 23:14:22 +0000533 /// FinishFunction - Complete IR generation of the current function. It is
534 /// legal to call this function even if there is no current insertion point.
Daniel Dunbar89654ee2008-08-26 08:29:31 +0000535 void FinishFunction(SourceLocation EndLoc=SourceLocation());
Daniel Dunbar613855c2008-09-09 23:27:19 +0000536
Anders Carlssonbad991d2010-03-24 00:39:18 +0000537 /// GenerateThunk - Generate a thunk for the given method.
538 void GenerateThunk(llvm::Function *Fn, GlobalDecl GD, const ThunkInfo &Thunk);
539
Douglas Gregor94f9a482010-05-05 05:51:00 +0000540 void EmitCtorPrologue(const CXXConstructorDecl *CD, CXXCtorType Type,
541 FunctionArgList &Args);
Mike Stump11289f42009-09-09 15:08:12 +0000542
Anders Carlssone87fae92010-03-28 19:40:00 +0000543 /// InitializeVTablePointer - Initialize the vtable pointer of the given
544 /// subobject.
545 ///
Anders Carlsson652758c2010-04-20 05:22:15 +0000546 void InitializeVTablePointer(BaseSubobject Base,
547 const CXXRecordDecl *NearestVBase,
Anders Carlssonc4d0d0f2010-05-03 00:07:07 +0000548 uint64_t OffsetFromNearestVBase,
Anders Carlssone87fae92010-03-28 19:40:00 +0000549 llvm::Constant *VTable,
550 const CXXRecordDecl *VTableClass);
551
552 typedef llvm::SmallPtrSet<const CXXRecordDecl *, 4> VisitedVirtualBasesSetTy;
Anders Carlsson652758c2010-04-20 05:22:15 +0000553 void InitializeVTablePointers(BaseSubobject Base,
554 const CXXRecordDecl *NearestVBase,
Anders Carlssonc4d0d0f2010-05-03 00:07:07 +0000555 uint64_t OffsetFromNearestVBase,
Anders Carlssond5895932010-03-28 21:07:49 +0000556 bool BaseIsNonVirtualPrimaryBase,
557 llvm::Constant *VTable,
558 const CXXRecordDecl *VTableClass,
559 VisitedVirtualBasesSetTy& VBases);
Eli Friedmanbb5008a2009-12-08 06:46:18 +0000560
Anders Carlssond5895932010-03-28 21:07:49 +0000561 void InitializeVTablePointers(const CXXRecordDecl *ClassDecl);
Anders Carlssone87fae92010-03-28 19:40:00 +0000562
563
Fariborz Jahanianaa01d2a2009-07-30 17:49:11 +0000564 /// EmitDtorEpilogue - Emit all code that comes at the end of class's
Mike Stumpe5311b02009-11-30 20:08:49 +0000565 /// destructor. This is to call destructors on members and base classes in
566 /// reverse order of their construction.
Anders Carlssonddf57d32009-09-14 05:32:02 +0000567 void EmitDtorEpilogue(const CXXDestructorDecl *Dtor,
568 CXXDtorType Type);
Mike Stump11289f42009-09-09 15:08:12 +0000569
Mike Stumpfc496822009-02-08 23:14:22 +0000570 /// EmitFunctionProlog - Emit the target specific LLVM code to load the
571 /// arguments for the given function. This is also responsible for naming the
572 /// LLVM function arguments.
Daniel Dunbard931a872009-02-02 22:03:45 +0000573 void EmitFunctionProlog(const CGFunctionInfo &FI,
574 llvm::Function *Fn,
Daniel Dunbar613855c2008-09-09 23:27:19 +0000575 const FunctionArgList &Args);
576
Mike Stumpfc496822009-02-08 23:14:22 +0000577 /// EmitFunctionEpilog - Emit the target specific LLVM code to return the
578 /// given temporary.
Daniel Dunbard931a872009-02-02 22:03:45 +0000579 void EmitFunctionEpilog(const CGFunctionInfo &FI, llvm::Value *ReturnValue);
Daniel Dunbar613855c2008-09-09 23:27:19 +0000580
Mike Stump1d849212009-12-07 23:38:24 +0000581 /// EmitStartEHSpec - Emit the start of the exception spec.
582 void EmitStartEHSpec(const Decl *D);
583
584 /// EmitEndEHSpec - Emit the end of the exception spec.
585 void EmitEndEHSpec(const Decl *D);
586
Mike Stumpf5cbb082009-12-10 00:02:42 +0000587 /// getTerminateHandler - Return a handler that just calls terminate.
Mike Stump2b488872009-12-09 22:59:31 +0000588 llvm::BasicBlock *getTerminateHandler();
589
Daniel Dunbaree3da872009-02-03 23:03:55 +0000590 const llvm::Type *ConvertTypeForMem(QualType T);
Chris Lattnerf033c142007-06-22 19:05:19 +0000591 const llvm::Type *ConvertType(QualType T);
John McCall6ce74722010-02-16 04:15:37 +0000592 const llvm::Type *ConvertType(const TypeDecl *T) {
593 return ConvertType(getContext().getTypeDeclType(T));
594 }
Chris Lattner5506f8c2008-04-04 04:07:35 +0000595
Mike Stumpfc496822009-02-08 23:14:22 +0000596 /// LoadObjCSelf - Load the value of self. This function is only valid while
597 /// generating code for an Objective-C method.
Chris Lattner5506f8c2008-04-04 04:07:35 +0000598 llvm::Value *LoadObjCSelf();
Mike Stumpfc496822009-02-08 23:14:22 +0000599
600 /// TypeOfSelfObject - Return type of object that this self represents.
Fariborz Jahanianc88a70d2009-02-03 00:09:52 +0000601 QualType TypeOfSelfObject();
Chris Lattner5696e7b2008-06-17 18:05:57 +0000602
Chris Lattner54fb19e2007-06-22 22:02:34 +0000603 /// hasAggregateLLVMType - Return true if the specified AST type will map into
604 /// an aggregate LLVM type or is void.
605 static bool hasAggregateLLVMType(QualType T);
Daniel Dunbar75283ff2008-11-11 02:29:29 +0000606
607 /// createBasicBlock - Create an LLVM basic block.
Mike Stumpfc496822009-02-08 23:14:22 +0000608 llvm::BasicBlock *createBasicBlock(const char *Name="",
Daniel Dunbar75283ff2008-11-11 02:29:29 +0000609 llvm::Function *Parent=0,
610 llvm::BasicBlock *InsertBefore=0) {
Daniel Dunbar851eec12008-11-12 00:01:12 +0000611#ifdef NDEBUG
Owen Anderson41a75022009-08-13 21:57:51 +0000612 return llvm::BasicBlock::Create(VMContext, "", Parent, InsertBefore);
Daniel Dunbar851eec12008-11-12 00:01:12 +0000613#else
Owen Anderson41a75022009-08-13 21:57:51 +0000614 return llvm::BasicBlock::Create(VMContext, Name, Parent, InsertBefore);
Daniel Dunbar851eec12008-11-12 00:01:12 +0000615#endif
Daniel Dunbar75283ff2008-11-11 02:29:29 +0000616 }
Mike Stumpfc496822009-02-08 23:14:22 +0000617
Chris Lattnerac248202007-05-30 00:13:02 +0000618 /// getBasicBlockForLabel - Return the LLVM basicblock that the specified
619 /// label maps to.
620 llvm::BasicBlock *getBasicBlockForLabel(const LabelStmt *S);
Mike Stumpfc496822009-02-08 23:14:22 +0000621
Mike Stumpe5311b02009-11-30 20:08:49 +0000622 /// SimplifyForwardingBlocks - If the given basic block is only a branch to
623 /// another basic block, simplify it. This assumes that no other code could
624 /// potentially reference the basic block.
Daniel Dunbarf77e2922009-04-01 04:37:47 +0000625 void SimplifyForwardingBlocks(llvm::BasicBlock *BB);
626
Mike Stumpfc496822009-02-08 23:14:22 +0000627 /// EmitBlock - Emit the given block \arg BB and set it as the insert point,
628 /// adding a fall-through branch from the current insert block if
629 /// necessary. It is legal to call this function even if there is no current
630 /// insertion point.
Daniel Dunbarfcac22e2008-11-13 01:24:05 +0000631 ///
Mike Stumpfc496822009-02-08 23:14:22 +0000632 /// IsFinished - If true, indicates that the caller has finished emitting
633 /// branches to the given block and does not expect to emit code into it. This
634 /// means the block can be ignored if it is unreachable.
Daniel Dunbarfcac22e2008-11-13 01:24:05 +0000635 void EmitBlock(llvm::BasicBlock *BB, bool IsFinished=false);
Daniel Dunbar29ac59f2008-11-11 04:34:23 +0000636
Mike Stumpfc496822009-02-08 23:14:22 +0000637 /// EmitBranch - Emit a branch to the specified basic block from the current
638 /// insert block, taking care to avoid creation of branches from dummy
639 /// blocks. It is legal to call this function even if there is no current
640 /// insertion point.
Daniel Dunbarab197eb2008-11-11 22:06:59 +0000641 ///
Mike Stumpfc496822009-02-08 23:14:22 +0000642 /// This function clears the current insertion point. The caller should follow
643 /// calls to this function with calls to Emit*Block prior to generation new
644 /// code.
Daniel Dunbarc56e6762008-11-11 09:41:28 +0000645 void EmitBranch(llvm::BasicBlock *Block);
646
Mike Stumpfc496822009-02-08 23:14:22 +0000647 /// HaveInsertPoint - True if an insertion point is defined. If not, this
648 /// indicates that the current code being emitted is unreachable.
649 bool HaveInsertPoint() const {
Daniel Dunbar5c7e3932008-11-11 23:11:34 +0000650 return Builder.GetInsertBlock() != 0;
651 }
652
Mike Stumpfc496822009-02-08 23:14:22 +0000653 /// EnsureInsertPoint - Ensure that an insertion point is defined so that
654 /// emitted IR has a place to go. Note that by definition, if this function
655 /// creates a block then that block is unreachable; callers may do better to
656 /// detect when no insertion point is defined and simply skip IR generation.
Daniel Dunbar5c7e3932008-11-11 23:11:34 +0000657 void EnsureInsertPoint() {
658 if (!HaveInsertPoint())
659 EmitBlock(createBasicBlock());
660 }
Mike Stumpfc496822009-02-08 23:14:22 +0000661
Daniel Dunbara7c8cf62008-08-16 00:56:44 +0000662 /// ErrorUnsupported - Print out an error that codegen doesn't support the
Chris Lattnerfc944342007-12-02 01:43:38 +0000663 /// specified stmt yet.
Daniel Dunbarf2cf6d12008-09-04 03:43:08 +0000664 void ErrorUnsupported(const Stmt *S, const char *Type,
665 bool OmitOnError=false);
Chris Lattner84915fa2007-06-02 04:16:21 +0000666
Chris Lattnere9a64532007-06-22 21:44:33 +0000667 //===--------------------------------------------------------------------===//
668 // Helpers
669 //===--------------------------------------------------------------------===//
Mike Stumpfc496822009-02-08 23:14:22 +0000670
John McCall8ccfcb52009-09-24 19:53:00 +0000671 Qualifiers MakeQualifiers(QualType T) {
Mike Stump53f9ded2009-11-03 23:25:48 +0000672 Qualifiers Quals = getContext().getCanonicalType(T).getQualifiers();
John McCall8ccfcb52009-09-24 19:53:00 +0000673 Quals.setObjCGCAttr(getContext().getObjCGCAttrKind(T));
674 return Quals;
675 }
676
Chris Lattnere9a64532007-06-22 21:44:33 +0000677 /// CreateTempAlloca - This creates a alloca and inserts it into the entry
Daniel Dunbara7566f12010-02-09 02:48:28 +0000678 /// block. The caller is responsible for setting an appropriate alignment on
679 /// the alloca.
Chris Lattnere9a64532007-06-22 21:44:33 +0000680 llvm::AllocaInst *CreateTempAlloca(const llvm::Type *Ty,
Daniel Dunbarb5aacc22009-10-19 01:21:05 +0000681 const llvm::Twine &Name = "tmp");
Mike Stumpfc496822009-02-08 23:14:22 +0000682
John McCall2e6567a2010-04-22 01:10:34 +0000683 /// InitTempAlloca - Provide an initial value for the given alloca.
684 void InitTempAlloca(llvm::AllocaInst *Alloca, llvm::Value *Value);
685
Daniel Dunbard0049182010-02-16 19:44:13 +0000686 /// CreateIRTemp - Create a temporary IR object of the given type, with
687 /// appropriate alignment. This routine should only be used when an temporary
688 /// value needs to be stored into an alloca (for example, to avoid explicit
689 /// PHI construction), but the type is the IR type, not the type appropriate
690 /// for storing in memory.
691 llvm::Value *CreateIRTemp(QualType T, const llvm::Twine &Name = "tmp");
692
Daniel Dunbara7566f12010-02-09 02:48:28 +0000693 /// CreateMemTemp - Create a temporary memory object of the given type, with
694 /// appropriate alignment.
695 llvm::Value *CreateMemTemp(QualType T, const llvm::Twine &Name = "tmp");
696
Chris Lattner8394d792007-06-05 20:53:16 +0000697 /// EvaluateExprAsBool - Perform the usual unary conversions on the specified
698 /// expression and compare the result against zero, returning an Int1Ty value.
Chris Lattner23b7eb62007-06-15 23:05:46 +0000699 llvm::Value *EvaluateExprAsBool(const Expr *E);
Chris Lattnere9a64532007-06-22 21:44:33 +0000700
Chris Lattner4647a212007-08-31 22:49:20 +0000701 /// EmitAnyExpr - Emit code to compute the specified expression which can have
702 /// any type. The result is returned as an RValue struct. If this is an
703 /// aggregate expression, the aggloc/agglocvolatile arguments indicate where
704 /// the result should be returned.
Mike Stumpec3cbfe2009-05-26 22:03:21 +0000705 ///
706 /// \param IgnoreResult - True if the resulting value isn't used.
Mike Stumpfc496822009-02-08 23:14:22 +0000707 RValue EmitAnyExpr(const Expr *E, llvm::Value *AggLoc = 0,
Anders Carlsson5b106a72009-08-16 07:36:22 +0000708 bool IsAggLocVolatile = false, bool IgnoreResult = false,
709 bool IsInitializer = false);
Devang Patel8ec4f832007-09-28 21:49:18 +0000710
Mike Stumpfc496822009-02-08 23:14:22 +0000711 // EmitVAListRef - Emit a "reference" to a va_list; this is either the address
712 // or the value of the expression, depending on how va_list is defined.
Eli Friedmanddea0ad2009-01-20 17:46:04 +0000713 llvm::Value *EmitVAListRef(const Expr *E);
714
Mike Stumpfc496822009-02-08 23:14:22 +0000715 /// EmitAnyExprToTemp - Similary to EmitAnyExpr(), however, the result will
716 /// always be accessible even if no aggregate location is provided.
Anders Carlsson5b106a72009-08-16 07:36:22 +0000717 RValue EmitAnyExprToTemp(const Expr *E, bool IsAggLocVolatile = false,
718 bool IsInitializer = false);
Daniel Dunbar41cf9de2008-09-09 01:06:48 +0000719
John McCall21886962010-04-21 10:05:39 +0000720 /// EmitsAnyExprToMem - Emits the code necessary to evaluate an
721 /// arbitrary expression into the given memory location.
722 void EmitAnyExprToMem(const Expr *E, llvm::Value *Location,
723 bool IsLocationVolatile = false,
724 bool IsInitializer = false);
725
Mike Stump5e9e61b2009-05-23 22:29:41 +0000726 /// EmitAggregateCopy - Emit an aggrate copy.
727 ///
728 /// \param isVolatile - True iff either the source or the destination is
729 /// volatile.
Daniel Dunbar0bc8e862008-09-09 20:49:46 +0000730 void EmitAggregateCopy(llvm::Value *DestPtr, llvm::Value *SrcPtr,
Mike Stump5e9e61b2009-05-23 22:29:41 +0000731 QualType EltTy, bool isVolatile=false);
Daniel Dunbar0bc8e862008-09-09 20:49:46 +0000732
Devang Patelda5d6bb2007-10-04 23:45:31 +0000733 /// StartBlock - Start new block named N. If insert block is a dummy block
734 /// then reuse it.
735 void StartBlock(const char *N);
736
Lauro Ramos Venancio01a72ff2008-02-26 21:41:45 +0000737 /// GetAddrOfStaticLocalVar - Return the address of a static local variable.
Steve Naroff08899ff2008-04-15 22:42:06 +0000738 llvm::Constant *GetAddrOfStaticLocalVar(const VarDecl *BVD);
Dan Gohman75d69da2008-05-22 00:50:06 +0000739
Anders Carlsson9396a892008-09-11 09:15:33 +0000740 /// GetAddrOfLocalVar - Return the address of a local variable.
741 llvm::Value *GetAddrOfLocalVar(const VarDecl *VD);
Mike Stumpfc496822009-02-08 23:14:22 +0000742
Dan Gohman75d69da2008-05-22 00:50:06 +0000743 /// getAccessedFieldNo - Given an encoded value and a result number, return
744 /// the input field number being accessed.
745 static unsigned getAccessedFieldNo(unsigned Idx, const llvm::Constant *Elts);
746
Chris Lattner6c4d2552009-10-28 23:59:40 +0000747 llvm::BlockAddress *GetAddrOfLabel(const LabelStmt *L);
Chris Lattner2bb5cb42009-10-13 06:55:33 +0000748 llvm::BasicBlock *GetIndirectGotoBlock();
Daniel Dunbar88402ce2008-08-04 16:51:22 +0000749
Mike Stumpfc496822009-02-08 23:14:22 +0000750 /// EmitMemSetToZero - Generate code to memset a value of the given type to 0.
Anders Carlsson2e744e82008-08-30 19:51:14 +0000751 void EmitMemSetToZero(llvm::Value *DestPtr, QualType Ty);
Anders Carlsson13abd7e2008-11-04 05:30:00 +0000752
753 // EmitVAArg - Generate code to get an argument from the passed in pointer
754 // and update it accordingly. The return value is a pointer to the argument.
755 // FIXME: We should be able to get rid of this method and use the va_arg
Mike Stumpfc496822009-02-08 23:14:22 +0000756 // instruction in LLVM instead once it works well enough.
Anders Carlsson13abd7e2008-11-04 05:30:00 +0000757 llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty);
Anders Carlssone388a5b2008-12-20 20:27:15 +0000758
Mike Stumpe5311b02009-11-30 20:08:49 +0000759 /// EmitVLASize - Generate code for any VLA size expressions that might occur
760 /// in a variably modified type. If Ty is a VLA, will return the value that
761 /// corresponds to the size in bytes of the VLA type. Will return 0 otherwise.
Daniel Dunbarb6adc432009-07-19 06:58:07 +0000762 ///
763 /// This function can be called with a null (unreachable) insert point.
Anders Carlsson8a01b792008-12-20 20:46:34 +0000764 llvm::Value *EmitVLASize(QualType Ty);
Mike Stumpfc496822009-02-08 23:14:22 +0000765
Anders Carlssonccbe9202008-12-12 07:19:02 +0000766 // GetVLASize - Returns an LLVM value that corresponds to the size in bytes
767 // of a variable length array type.
768 llvm::Value *GetVLASize(const VariableArrayType *);
769
Anders Carlssona5d077d2009-04-14 16:58:56 +0000770 /// LoadCXXThis - Load the value of 'this'. This function is only valid while
771 /// generating code for an C++ member function.
John McCall347132b2010-02-16 22:04:33 +0000772 llvm::Value *LoadCXXThis() {
773 assert(CXXThisValue && "no 'this' value for this function");
774 return CXXThisValue;
775 }
Mike Stump11289f42009-09-09 15:08:12 +0000776
Anders Carlssone36a6b32010-01-02 01:01:18 +0000777 /// LoadCXXVTT - Load the VTT parameter to base constructors/destructors have
778 /// virtual bases.
John McCall347132b2010-02-16 22:04:33 +0000779 llvm::Value *LoadCXXVTT() {
780 assert(CXXVTTValue && "no VTT value for this function");
781 return CXXVTTValue;
782 }
John McCall6ce74722010-02-16 04:15:37 +0000783
784 /// GetAddressOfBaseOfCompleteClass - Convert the given pointer to a
Anders Carlssonc4ba0cd2010-04-24 23:01:49 +0000785 /// complete class to the given direct base.
786 llvm::Value *
787 GetAddressOfDirectBaseInCompleteClass(llvm::Value *Value,
788 const CXXRecordDecl *Derived,
789 const CXXRecordDecl *Base,
790 bool BaseIsVirtual);
Anders Carlssonbea9e742010-04-24 21:51:08 +0000791
Mike Stumpe5311b02009-11-30 20:08:49 +0000792 /// GetAddressOfBaseClass - This function will add the necessary delta to the
793 /// load of 'this' and returns address of the base class.
Anders Carlssond829a022010-04-24 21:06:20 +0000794 llvm::Value *GetAddressOfBaseClass(llvm::Value *Value,
Anders Carlssonc4ba0cd2010-04-24 23:01:49 +0000795 const CXXRecordDecl *Derived,
Anders Carlssond829a022010-04-24 21:06:20 +0000796 const CXXBaseSpecifierArray &BasePath,
797 bool NullCheckValue);
798
Anders Carlsson8c793172009-11-23 17:57:54 +0000799 llvm::Value *GetAddressOfDerivedClass(llvm::Value *Value,
Anders Carlssonc4ba0cd2010-04-24 23:01:49 +0000800 const CXXRecordDecl *Derived,
Anders Carlsson8a64c1c2010-04-24 21:23:59 +0000801 const CXXBaseSpecifierArray &BasePath,
Anders Carlsson8c793172009-11-23 17:57:54 +0000802 bool NullCheckValue);
803
Anders Carlsson84673e22010-01-31 01:36:53 +0000804 llvm::Value *GetVirtualBaseClassOffset(llvm::Value *This,
805 const CXXRecordDecl *ClassDecl,
806 const CXXRecordDecl *BaseClassDecl);
Anders Carlssonc6d171e2009-10-06 22:43:30 +0000807
John McCallf8ff7b92010-02-23 00:48:20 +0000808 void EmitDelegateCXXConstructorCall(const CXXConstructorDecl *Ctor,
809 CXXCtorType CtorType,
810 const FunctionArgList &Args);
Anders Carlssone11f9ce2010-05-02 23:20:53 +0000811 void EmitCXXConstructorCall(const CXXConstructorDecl *D, CXXCtorType Type,
812 bool ForVirtualBase, llvm::Value *This,
Anders Carlssonb7f8f592009-04-17 00:06:03 +0000813 CallExpr::const_arg_iterator ArgBeg,
814 CallExpr::const_arg_iterator ArgEnd);
Mike Stump11289f42009-09-09 15:08:12 +0000815
Fariborz Jahanian431c8832009-08-19 20:55:16 +0000816 void EmitCXXAggrConstructorCall(const CXXConstructorDecl *D,
Anders Carlssond49844b2009-09-23 02:45:36 +0000817 const ConstantArrayType *ArrayTy,
Anders Carlsson3a202f62009-11-24 18:43:52 +0000818 llvm::Value *ArrayPtr,
819 CallExpr::const_arg_iterator ArgBeg,
820 CallExpr::const_arg_iterator ArgEnd);
821
Anders Carlssond49844b2009-09-23 02:45:36 +0000822 void EmitCXXAggrConstructorCall(const CXXConstructorDecl *D,
823 llvm::Value *NumElements,
Anders Carlsson3a202f62009-11-24 18:43:52 +0000824 llvm::Value *ArrayPtr,
825 CallExpr::const_arg_iterator ArgBeg,
826 CallExpr::const_arg_iterator ArgEnd);
Anders Carlssonb7f8f592009-04-17 00:06:03 +0000827
Fariborz Jahanian9c837202009-08-20 20:54:15 +0000828 void EmitCXXAggrDestructorCall(const CXXDestructorDecl *D,
829 const ArrayType *Array,
830 llvm::Value *This);
Mike Stump11289f42009-09-09 15:08:12 +0000831
Fariborz Jahanian6814eaa2009-11-13 19:27:47 +0000832 void EmitCXXAggrDestructorCall(const CXXDestructorDecl *D,
833 llvm::Value *NumElements,
834 llvm::Value *This);
835
Chris Lattner116ce8f2010-01-09 21:40:03 +0000836 llvm::Constant *GenerateCXXAggrDestructorHelper(const CXXDestructorDecl *D,
Fariborz Jahanian1254a092009-11-10 19:24:06 +0000837 const ArrayType *Array,
838 llvm::Value *This);
839
Anders Carlsson0a637412009-05-29 21:03:38 +0000840 void EmitCXXDestructorCall(const CXXDestructorDecl *D, CXXDtorType Type,
Anders Carlssonf8a71f02010-05-02 23:29:11 +0000841 bool ForVirtualBase, llvm::Value *This);
Mike Stump11289f42009-09-09 15:08:12 +0000842
Anders Carlsson8eb93e72009-05-31 00:34:10 +0000843 void PushCXXTemporary(const CXXTemporary *Temporary, llvm::Value *Ptr);
Anders Carlsson4c49bb92009-06-03 19:05:16 +0000844 void PopCXXTemporary();
Mike Stump11289f42009-09-09 15:08:12 +0000845
Anders Carlsson4a7b49b2009-05-31 01:40:14 +0000846 llvm::Value *EmitCXXNewExpr(const CXXNewExpr *E);
Anders Carlsson81f0df92009-08-16 21:13:42 +0000847 void EmitCXXDeleteExpr(const CXXDeleteExpr *E);
Mike Stump11289f42009-09-09 15:08:12 +0000848
Eli Friedman24f55432009-11-18 00:57:03 +0000849 void EmitDeleteCall(const FunctionDecl *DeleteFD, llvm::Value *Ptr,
850 QualType DeleteTy);
851
Mike Stumpc9b231c2009-11-15 08:09:41 +0000852 llvm::Value* EmitCXXTypeidExpr(const CXXTypeidExpr *E);
Mike Stump65511702009-11-16 06:50:58 +0000853 llvm::Value *EmitDynamicCast(llvm::Value *V, const CXXDynamicCastExpr *DCE);
Mike Stumpc9b231c2009-11-15 08:09:41 +0000854
Mike Stump3f6f9fe2009-12-16 02:57:00 +0000855 void EmitCheck(llvm::Value *, unsigned Size);
856
Chris Lattner116ce8f2010-01-09 21:40:03 +0000857 llvm::Value *EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV,
858 bool isInc, bool isPre);
859 ComplexPairTy EmitComplexPrePostIncDec(const UnaryOperator *E, LValue LV,
860 bool isInc, bool isPre);
Chris Lattner8394d792007-06-05 20:53:16 +0000861 //===--------------------------------------------------------------------===//
Chris Lattner53621a52007-06-13 20:44:40 +0000862 // Declaration Emission
Chris Lattner84915fa2007-06-02 04:16:21 +0000863 //===--------------------------------------------------------------------===//
Mike Stumpfc496822009-02-08 23:14:22 +0000864
Daniel Dunbarb6adc432009-07-19 06:58:07 +0000865 /// EmitDecl - Emit a declaration.
866 ///
867 /// This function can be called with a null (unreachable) insert point.
Chris Lattner1ad38f82007-06-09 01:20:56 +0000868 void EmitDecl(const Decl &D);
Daniel Dunbarb6adc432009-07-19 06:58:07 +0000869
Mike Stump11289f42009-09-09 15:08:12 +0000870 /// EmitBlockVarDecl - Emit a block variable declaration.
Daniel Dunbarb6adc432009-07-19 06:58:07 +0000871 ///
872 /// This function can be called with a null (unreachable) insert point.
Steve Naroff08899ff2008-04-15 22:42:06 +0000873 void EmitBlockVarDecl(const VarDecl &D);
Daniel Dunbarb6adc432009-07-19 06:58:07 +0000874
875 /// EmitLocalBlockVarDecl - Emit a local block variable declaration.
876 ///
877 /// This function can be called with a null (unreachable) insert point.
Steve Naroff08899ff2008-04-15 22:42:06 +0000878 void EmitLocalBlockVarDecl(const VarDecl &D);
Daniel Dunbarb6adc432009-07-19 06:58:07 +0000879
Anders Carlssoncee2d2f2010-02-07 02:03:08 +0000880 void EmitStaticBlockVarDecl(const VarDecl &D,
881 llvm::GlobalValue::LinkageTypes Linkage);
Daniel Dunbara94ecd22008-08-16 03:19:19 +0000882
883 /// EmitParmDecl - Emit a ParmVarDecl or an ImplicitParamDecl.
884 void EmitParmDecl(const VarDecl &D, llvm::Value *Arg);
Mike Stumpfc496822009-02-08 23:14:22 +0000885
Chris Lattner84915fa2007-06-02 04:16:21 +0000886 //===--------------------------------------------------------------------===//
Chris Lattner308f4312007-05-29 23:50:05 +0000887 // Statement Emission
888 //===--------------------------------------------------------------------===//
889
Mike Stumpfc496822009-02-08 23:14:22 +0000890 /// EmitStopPoint - Emit a debug stoppoint if we are emitting debug info.
Daniel Dunbar5fc28712008-11-12 08:21:33 +0000891 void EmitStopPoint(const Stmt *S);
892
Mike Stumpfc496822009-02-08 23:14:22 +0000893 /// EmitStmt - Emit the code for the statement \arg S. It is legal to call
894 /// this function even if there is no current insertion point.
895 ///
896 /// This function may clear the current insertion point; callers should use
897 /// EnsureInsertPoint if they wish to subsequently generate code without first
898 /// calling EmitBlock, EmitBranch, or EmitStmt.
Chris Lattner308f4312007-05-29 23:50:05 +0000899 void EmitStmt(const Stmt *S);
Daniel Dunbar5c7e3932008-11-11 23:11:34 +0000900
Daniel Dunbar5fc28712008-11-12 08:21:33 +0000901 /// EmitSimpleStmt - Try to emit a "simple" statement which does not
Mike Stumpfc496822009-02-08 23:14:22 +0000902 /// necessarily require an insertion point or debug information; typically
903 /// because the statement amounts to a jump or a container of other
904 /// statements.
Daniel Dunbar5fc28712008-11-12 08:21:33 +0000905 ///
906 /// \return True if the statement was handled.
907 bool EmitSimpleStmt(const Stmt *S);
908
Chris Lattner4647a212007-08-31 22:49:20 +0000909 RValue EmitCompoundStmt(const CompoundStmt &S, bool GetLast = false,
910 llvm::Value *AggLoc = 0, bool isAggVol = false);
Daniel Dunbar5c7e3932008-11-11 23:11:34 +0000911
Mike Stumpfc496822009-02-08 23:14:22 +0000912 /// EmitLabel - Emit the block for the given label. It is legal to call this
913 /// function even if there is no current insertion point.
Chris Lattner7e800972008-07-26 20:23:23 +0000914 void EmitLabel(const LabelStmt &S); // helper for EmitLabelStmt.
Daniel Dunbar5c7e3932008-11-11 23:11:34 +0000915
Chris Lattnerac248202007-05-30 00:13:02 +0000916 void EmitLabelStmt(const LabelStmt &S);
917 void EmitGotoStmt(const GotoStmt &S);
Daniel Dunbar88402ce2008-08-04 16:51:22 +0000918 void EmitIndirectGotoStmt(const IndirectGotoStmt &S);
Chris Lattner5269c032007-05-30 21:03:58 +0000919 void EmitIfStmt(const IfStmt &S);
Chris Lattner946aa312007-06-05 03:59:43 +0000920 void EmitWhileStmt(const WhileStmt &S);
Chris Lattner8394d792007-06-05 20:53:16 +0000921 void EmitDoStmt(const DoStmt &S);
922 void EmitForStmt(const ForStmt &S);
Chris Lattner3f3dbee2007-06-02 03:19:07 +0000923 void EmitReturnStmt(const ReturnStmt &S);
Chris Lattner1ad38f82007-06-09 01:20:56 +0000924 void EmitDeclStmt(const DeclStmt &S);
Daniel Dunbar5fc28712008-11-12 08:21:33 +0000925 void EmitBreakStmt(const BreakStmt &S);
926 void EmitContinueStmt(const ContinueStmt &S);
Devang Patelda5d6bb2007-10-04 23:45:31 +0000927 void EmitSwitchStmt(const SwitchStmt &S);
928 void EmitDefaultStmt(const DefaultStmt &S);
929 void EmitCaseStmt(const CaseStmt &S);
Devang Patel11663122007-10-08 20:57:48 +0000930 void EmitCaseStmtRange(const CaseStmt &S);
Anders Carlsson952a9952008-02-05 16:35:33 +0000931 void EmitAsmStmt(const AsmStmt &S);
Mike Stumpfc496822009-02-08 23:14:22 +0000932
Anders Carlsson2e744e82008-08-30 19:51:14 +0000933 void EmitObjCForCollectionStmt(const ObjCForCollectionStmt &S);
Anders Carlsson1963b0c2008-09-09 10:04:29 +0000934 void EmitObjCAtTryStmt(const ObjCAtTryStmt &S);
935 void EmitObjCAtThrowStmt(const ObjCAtThrowStmt &S);
Chris Lattnere132e242008-11-15 21:26:17 +0000936 void EmitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt &S);
Mike Stumpfc496822009-02-08 23:14:22 +0000937
Douglas Gregor51150ab2010-05-16 01:24:12 +0000938 llvm::Constant *getUnwindResumeOrRethrowFn();
John McCallb81884d2010-02-19 09:25:03 +0000939 struct CXXTryStmtInfo {
940 llvm::BasicBlock *SavedLandingPad;
941 llvm::BasicBlock *HandlerBlock;
942 llvm::BasicBlock *FinallyBlock;
943 };
944 CXXTryStmtInfo EnterCXXTryStmt(const CXXTryStmt &S);
945 void ExitCXXTryStmt(const CXXTryStmt &S, CXXTryStmtInfo Info);
946
Anders Carlsson52d78a52009-09-27 18:58:34 +0000947 void EmitCXXTryStmt(const CXXTryStmt &S);
948
Chris Lattner208ae962007-05-30 17:57:17 +0000949 //===--------------------------------------------------------------------===//
Chris Lattnerd7f58862007-06-02 05:24:33 +0000950 // LValue Expression Emission
951 //===--------------------------------------------------------------------===//
Chris Lattner8394d792007-06-05 20:53:16 +0000952
Daniel Dunbarc79407f2009-02-05 07:09:07 +0000953 /// GetUndefRValue - Get an appropriate 'undef' rvalue for the given type.
954 RValue GetUndefRValue(QualType Ty);
955
Daniel Dunbarbb197e42009-01-09 16:50:52 +0000956 /// EmitUnsupportedRValue - Emit a dummy r-value using the type of E
957 /// and issue an ErrorUnsupported style diagnostic (using the
958 /// provided Name).
959 RValue EmitUnsupportedRValue(const Expr *E,
960 const char *Name);
961
Mike Stumpfc496822009-02-08 23:14:22 +0000962 /// EmitUnsupportedLValue - Emit a dummy l-value using the type of E and issue
963 /// an ErrorUnsupported style diagnostic (using the provided Name).
Daniel Dunbarf2e69882008-08-25 20:45:57 +0000964 LValue EmitUnsupportedLValue(const Expr *E,
965 const char *Name);
966
Chris Lattner8394d792007-06-05 20:53:16 +0000967 /// EmitLValue - Emit code to compute a designator that specifies the location
968 /// of the expression.
969 ///
970 /// This can return one of two things: a simple address or a bitfield
971 /// reference. In either case, the LLVM Value* in the LValue structure is
972 /// guaranteed to be an LLVM pointer type.
973 ///
974 /// If this returns a bitfield reference, nothing about the pointee type of
975 /// the LLVM value is known: For example, it may not be a pointer to an
976 /// integer.
977 ///
978 /// If this returns a normal address, and if the lvalue's C type is fixed
979 /// size, this method guarantees that the returned pointer type will point to
980 /// an LLVM type of the same size of the lvalue's type. If the lvalue has a
981 /// variable length type, this is not possible.
982 ///
Chris Lattnerd7f58862007-06-02 05:24:33 +0000983 LValue EmitLValue(const Expr *E);
Mike Stumpfc496822009-02-08 23:14:22 +0000984
Mike Stump3f6f9fe2009-12-16 02:57:00 +0000985 /// EmitCheckedLValue - Same as EmitLValue but additionally we generate
986 /// checking code to guard against undefined behavior. This is only
987 /// suitable when we know that the address will be used to access the
988 /// object.
989 LValue EmitCheckedLValue(const Expr *E);
990
Daniel Dunbar1d425462009-02-10 00:57:50 +0000991 /// EmitLoadOfScalar - Load a scalar value from an address, taking
992 /// care to appropriately convert from the memory representation to
993 /// the LLVM value representation.
Mike Stumpc6ea7c12009-02-17 17:00:02 +0000994 llvm::Value *EmitLoadOfScalar(llvm::Value *Addr, bool Volatile,
Daniel Dunbar1d425462009-02-10 00:57:50 +0000995 QualType Ty);
996
997 /// EmitStoreOfScalar - Store a scalar value to an address, taking
998 /// care to appropriately convert from the memory representation to
999 /// the LLVM value representation.
Mike Stumpc6ea7c12009-02-17 17:00:02 +00001000 void EmitStoreOfScalar(llvm::Value *Value, llvm::Value *Addr,
Anders Carlsson83709642009-05-19 18:50:41 +00001001 bool Volatile, QualType Ty);
Daniel Dunbar1d425462009-02-10 00:57:50 +00001002
Chris Lattner8394d792007-06-05 20:53:16 +00001003 /// EmitLoadOfLValue - Given an expression that represents a value lvalue,
1004 /// this method emits the address of the lvalue, then loads the result as an
1005 /// rvalue, returning the rvalue.
Chris Lattner9369a562007-06-29 16:31:29 +00001006 RValue EmitLoadOfLValue(LValue V, QualType LVType);
Nate Begemance4d7fc2008-04-18 23:10:10 +00001007 RValue EmitLoadOfExtVectorElementLValue(LValue V, QualType LVType);
Lauro Ramos Venancio2ddcb25a32008-01-22 20:17:04 +00001008 RValue EmitLoadOfBitfieldLValue(LValue LV, QualType ExprType);
Daniel Dunbar9e22c0d2008-08-29 08:11:39 +00001009 RValue EmitLoadOfPropertyRefLValue(LValue LV, QualType ExprType);
Fariborz Jahanian9ac53512008-11-22 22:30:21 +00001010 RValue EmitLoadOfKVCRefLValue(LValue LV, QualType ExprType);
Chris Lattner9369a562007-06-29 16:31:29 +00001011
Mike Stumpfc496822009-02-08 23:14:22 +00001012
Chris Lattner8394d792007-06-05 20:53:16 +00001013 /// EmitStoreThroughLValue - Store the specified rvalue into the specified
1014 /// lvalue, where both are guaranteed to the have the same type, and that type
1015 /// is 'Ty'.
1016 void EmitStoreThroughLValue(RValue Src, LValue Dst, QualType Ty);
Nate Begemance4d7fc2008-04-18 23:10:10 +00001017 void EmitStoreThroughExtVectorComponentLValue(RValue Src, LValue Dst,
1018 QualType Ty);
Daniel Dunbar9e22c0d2008-08-29 08:11:39 +00001019 void EmitStoreThroughPropertyRefLValue(RValue Src, LValue Dst, QualType Ty);
Fariborz Jahanian9ac53512008-11-22 22:30:21 +00001020 void EmitStoreThroughKVCRefLValue(RValue Src, LValue Dst, QualType Ty);
Daniel Dunbar9b1335e2008-11-19 09:36:46 +00001021
Mike Stumpfc496822009-02-08 23:14:22 +00001022 /// EmitStoreThroughLValue - Store Src into Dst with same constraints as
1023 /// EmitStoreThroughLValue.
Daniel Dunbar9b1335e2008-11-19 09:36:46 +00001024 ///
Mike Stumpfc496822009-02-08 23:14:22 +00001025 /// \param Result [out] - If non-null, this will be set to a Value* for the
1026 /// bit-field contents after the store, appropriate for use as the result of
1027 /// an assignment to the bit-field.
Daniel Dunbar9b1335e2008-11-19 09:36:46 +00001028 void EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst, QualType Ty,
1029 llvm::Value **Result=0);
Mike Stumpfc496822009-02-08 23:14:22 +00001030
Christopher Lambd91c3d42007-12-29 05:02:41 +00001031 // Note: only availabe for agg return types
Daniel Dunbar8cde00a2008-09-04 03:20:13 +00001032 LValue EmitBinaryOperatorLValue(const BinaryOperator *E);
Douglas Gregor914af212010-04-23 04:16:32 +00001033 LValue EmitCompoundAssignOperatorLValue(const CompoundAssignOperator *E);
Daniel Dunbar8d9dc4a2009-02-11 20:59:32 +00001034 // Note: only available for agg return types
Christopher Lambd91c3d42007-12-29 05:02:41 +00001035 LValue EmitCallExprLValue(const CallExpr *E);
Daniel Dunbar8d9dc4a2009-02-11 20:59:32 +00001036 // Note: only available for agg return types
1037 LValue EmitVAArgExprLValue(const VAArgExpr *E);
Chris Lattnerd7f58862007-06-02 05:24:33 +00001038 LValue EmitDeclRefLValue(const DeclRefExpr *E);
Chris Lattner4347e3692007-06-06 04:54:52 +00001039 LValue EmitStringLiteralLValue(const StringLiteral *E);
Chris Lattnerd7e7b8e2009-02-24 22:18:39 +00001040 LValue EmitObjCEncodeExprLValue(const ObjCEncodeExpr *E);
Daniel Dunbarb3517472008-10-17 21:58:32 +00001041 LValue EmitPredefinedFunctionName(unsigned Type);
Chris Lattner6307f192008-08-10 01:53:14 +00001042 LValue EmitPredefinedLValue(const PredefinedExpr *E);
Chris Lattner8394d792007-06-05 20:53:16 +00001043 LValue EmitUnaryOpLValue(const UnaryOperator *E);
Chris Lattnerd9d2fb12007-06-08 23:31:14 +00001044 LValue EmitArraySubscriptExpr(const ArraySubscriptExpr *E);
Nate Begemance4d7fc2008-04-18 23:10:10 +00001045 LValue EmitExtVectorElementExpr(const ExtVectorElementExpr *E);
Devang Patel3e11cce2007-10-23 02:10:49 +00001046 LValue EmitMemberExpr(const MemberExpr *E);
Fariborz Jahanian531c16f2009-12-09 23:35:29 +00001047 LValue EmitObjCIsaExpr(const ObjCIsaExpr *E);
Eli Friedman9fd8b682008-05-13 23:18:27 +00001048 LValue EmitCompoundLiteralLValue(const CompoundLiteralExpr *E);
Anders Carlsson1450adb2009-09-15 16:35:24 +00001049 LValue EmitConditionalOperatorLValue(const ConditionalOperator *E);
Chris Lattner28bcf1a2009-03-18 18:28:57 +00001050 LValue EmitCastLValue(const CastExpr *E);
Fariborz Jahaniane4d94ce2009-10-20 23:29:04 +00001051 LValue EmitNullInitializationLValue(const CXXZeroInitValueExpr *E);
Anders Carlsson509850e2009-11-07 22:00:15 +00001052
Daniel Dunbar722f4242009-04-22 05:08:15 +00001053 llvm::Value *EmitIvarOffset(const ObjCInterfaceDecl *Interface,
Daniel Dunbar1c64e5d2008-09-24 04:00:38 +00001054 const ObjCIvarDecl *Ivar);
Anders Carlssoncfd30122009-11-17 03:57:07 +00001055 LValue EmitLValueForField(llvm::Value* Base, const FieldDecl* Field,
Anders Carlsson5d8645b2010-01-29 05:05:36 +00001056 unsigned CVRQualifiers);
Anders Carlssondb78f0a2010-01-29 05:24:29 +00001057
1058 /// EmitLValueForFieldInitialization - Like EmitLValueForField, except that
1059 /// if the Field is a reference, this will return the address of the reference
1060 /// and not the address of the value stored in the reference.
1061 LValue EmitLValueForFieldInitialization(llvm::Value* Base,
1062 const FieldDecl* Field,
1063 unsigned CVRQualifiers);
1064
Fariborz Jahanianc88a70d2009-02-03 00:09:52 +00001065 LValue EmitLValueForIvar(QualType ObjectTy,
1066 llvm::Value* Base, const ObjCIvarDecl *Ivar,
Daniel Dunbar1c64e5d2008-09-24 04:00:38 +00001067 unsigned CVRQualifiers);
1068
Anders Carlssoncfd30122009-11-17 03:57:07 +00001069 LValue EmitLValueForBitfield(llvm::Value* Base, const FieldDecl* Field,
Fariborz Jahanian712bfa62009-02-03 19:03:09 +00001070 unsigned CVRQualifiers);
Fariborz Jahanianb517e902008-12-15 20:35:07 +00001071
Mike Stump1db7d042009-02-28 09:07:16 +00001072 LValue EmitBlockDeclRefLValue(const BlockDeclRefExpr *E);
1073
Anders Carlsson3be22e22009-05-30 23:23:33 +00001074 LValue EmitCXXConstructLValue(const CXXConstructExpr *E);
Anders Carlssonfd2af0c2009-05-30 23:30:54 +00001075 LValue EmitCXXBindTemporaryLValue(const CXXBindTemporaryExpr *E);
Anders Carlsson96bad9a2009-09-14 01:10:45 +00001076 LValue EmitCXXExprWithTemporariesLValue(const CXXExprWithTemporaries *E);
Mike Stumpc9b231c2009-11-15 08:09:41 +00001077 LValue EmitCXXTypeidLValue(const CXXTypeidExpr *E);
Anders Carlsson96bad9a2009-09-14 01:10:45 +00001078
Daniel Dunbarc8317a42008-08-23 10:51:21 +00001079 LValue EmitObjCMessageExprLValue(const ObjCMessageExpr *E);
Chris Lattner4bd55962008-03-30 23:03:07 +00001080 LValue EmitObjCIvarRefLValue(const ObjCIvarRefExpr *E);
Daniel Dunbar9e22c0d2008-08-29 08:11:39 +00001081 LValue EmitObjCPropertyRefLValue(const ObjCPropertyRefExpr *E);
Fariborz Jahanian9a846652009-08-20 17:02:02 +00001082 LValue EmitObjCKVCRefLValue(const ObjCImplicitSetterGetterRefExpr *E);
Chris Lattnera4185c52009-04-25 19:35:26 +00001083 LValue EmitObjCSuperExprLValue(const ObjCSuperExpr *E);
1084 LValue EmitStmtExprLValue(const StmtExpr *E);
Fariborz Jahanianffba6622009-10-22 22:57:31 +00001085 LValue EmitPointerToDataMemberBinaryExpr(const BinaryOperator *E);
1086
Chris Lattnerd7f58862007-06-02 05:24:33 +00001087 //===--------------------------------------------------------------------===//
Chris Lattner6278e6a2007-08-11 00:04:45 +00001088 // Scalar Expression Emission
Chris Lattner208ae962007-05-30 17:57:17 +00001089 //===--------------------------------------------------------------------===//
1090
Mike Stumpfc496822009-02-08 23:14:22 +00001091 /// EmitCall - Generate a call of the given function, expecting the given
1092 /// result type, and using the given argument list which specifies both the
1093 /// LLVM arguments and the types they were derived from.
Daniel Dunbarcdbb5e32009-02-20 18:06:48 +00001094 ///
Mike Stumpe5311b02009-11-30 20:08:49 +00001095 /// \param TargetDecl - If given, the decl of the function in a direct call;
1096 /// used to set attributes on the call (noreturn, etc.).
Daniel Dunbard931a872009-02-02 22:03:45 +00001097 RValue EmitCall(const CGFunctionInfo &FnInfo,
1098 llvm::Value *Callee,
Anders Carlsson61a401c2009-12-24 19:25:24 +00001099 ReturnValueSlot ReturnValue,
Daniel Dunbarcdbb5e32009-02-20 18:06:48 +00001100 const CallArgList &Args,
David Chisnall9eecafa2010-05-01 11:15:56 +00001101 const Decl *TargetDecl = 0,
David Chisnallff5f88c2010-05-02 13:41:58 +00001102 llvm::Instruction **callOrInvoke = 0);
Mike Stump11289f42009-09-09 15:08:12 +00001103
Anders Carlsson0435ed52009-12-24 19:08:58 +00001104 RValue EmitCall(QualType FnType, llvm::Value *Callee,
Anders Carlsson17490832009-12-24 20:40:36 +00001105 ReturnValueSlot ReturnValue,
Anders Carlsson3a9463b2009-05-27 01:22:39 +00001106 CallExpr::const_arg_iterator ArgBeg,
1107 CallExpr::const_arg_iterator ArgEnd,
1108 const Decl *TargetDecl = 0);
Anders Carlsson17490832009-12-24 20:40:36 +00001109 RValue EmitCallExpr(const CallExpr *E,
1110 ReturnValueSlot ReturnValue = ReturnValueSlot());
Mike Stump11289f42009-09-09 15:08:12 +00001111
Anders Carlssone828c362009-11-13 04:45:41 +00001112 llvm::Value *BuildVirtualCall(const CXXMethodDecl *MD, llvm::Value *This,
Mike Stumpa5588bf2009-08-26 20:46:33 +00001113 const llvm::Type *Ty);
Anders Carlssone828c362009-11-13 04:45:41 +00001114 llvm::Value *BuildVirtualCall(const CXXDestructorDecl *DD, CXXDtorType Type,
1115 llvm::Value *&This, const llvm::Type *Ty);
1116
Anders Carlssonbd7d11f2009-05-11 23:37:08 +00001117 RValue EmitCXXMemberCall(const CXXMethodDecl *MD,
1118 llvm::Value *Callee,
Anders Carlssonbfb36712009-12-24 21:13:40 +00001119 ReturnValueSlot ReturnValue,
Anders Carlssonbd7d11f2009-05-11 23:37:08 +00001120 llvm::Value *This,
Anders Carlssone36a6b32010-01-02 01:01:18 +00001121 llvm::Value *VTT,
Anders Carlssonbd7d11f2009-05-11 23:37:08 +00001122 CallExpr::const_arg_iterator ArgBeg,
1123 CallExpr::const_arg_iterator ArgEnd);
Anders Carlssonbfb36712009-12-24 21:13:40 +00001124 RValue EmitCXXMemberCallExpr(const CXXMemberCallExpr *E,
1125 ReturnValueSlot ReturnValue);
1126 RValue EmitCXXMemberPointerCallExpr(const CXXMemberCallExpr *E,
1127 ReturnValueSlot ReturnValue);
Ted Kremenek08e17112008-06-17 02:43:46 +00001128
Anders Carlsson4034a952009-05-27 04:18:27 +00001129 RValue EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E,
Anders Carlssonbfb36712009-12-24 21:13:40 +00001130 const CXXMethodDecl *MD,
1131 ReturnValueSlot ReturnValue);
Mike Stump11289f42009-09-09 15:08:12 +00001132
Anders Carlsson2ee3c012009-10-03 19:43:08 +00001133
Mike Stump11289f42009-09-09 15:08:12 +00001134 RValue EmitBuiltinExpr(const FunctionDecl *FD,
Daniel Dunbar8eb018a2009-02-16 22:43:43 +00001135 unsigned BuiltinID, const CallExpr *E);
Chris Lattner8394d792007-06-05 20:53:16 +00001136
Anders Carlssonbfb36712009-12-24 21:13:40 +00001137 RValue EmitBlockCallExpr(const CallExpr *E, ReturnValueSlot ReturnValue);
Mike Stumpc6ea7c12009-02-17 17:00:02 +00001138
Mike Stumpfc496822009-02-08 23:14:22 +00001139 /// EmitTargetBuiltinExpr - Emit the given builtin call. Returns 0 if the call
1140 /// is unhandled by the current target.
Daniel Dunbareca513d2008-10-10 00:24:54 +00001141 llvm::Value *EmitTargetBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
1142
Chris Lattner5cc15e02010-03-03 19:03:45 +00001143 llvm::Value *EmitARMBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
Anders Carlsson895af082007-12-09 23:17:02 +00001144 llvm::Value *EmitX86BuiltinExpr(unsigned BuiltinID, const CallExpr *E);
1145 llvm::Value *EmitPPCBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
Mike Stumpfc496822009-02-08 23:14:22 +00001146
Daniel Dunbar66912a12008-08-20 00:28:19 +00001147 llvm::Value *EmitObjCProtocolExpr(const ObjCProtocolExpr *E);
Chris Lattner2da04b32007-08-24 05:35:26 +00001148 llvm::Value *EmitObjCStringLiteral(const ObjCStringLiteral *E);
Chris Lattnerb1d329d2008-06-24 17:04:18 +00001149 llvm::Value *EmitObjCSelectorExpr(const ObjCSelectorExpr *E);
Daniel Dunbar97db84c2008-08-23 03:46:30 +00001150 RValue EmitObjCMessageExpr(const ObjCMessageExpr *E);
Fariborz Jahanian8a1810f2008-11-22 18:39:36 +00001151 RValue EmitObjCPropertyGet(const Expr *E);
Fariborz Jahanian391d4fc2009-03-20 19:18:21 +00001152 RValue EmitObjCSuperPropertyGet(const Expr *Exp, const Selector &S);
Fariborz Jahanian9ac53512008-11-22 22:30:21 +00001153 void EmitObjCPropertySet(const Expr *E, RValue Src);
Fariborz Jahanian391d4fc2009-03-20 19:18:21 +00001154 void EmitObjCSuperPropertySet(const Expr *E, const Selector &S, RValue Src);
Chris Lattnerb1d329d2008-06-24 17:04:18 +00001155
1156
Anders Carlsson6f5a0152009-05-20 00:24:07 +00001157 /// EmitReferenceBindingToExpr - Emits a reference binding to the passed in
1158 /// expression. Will emit a temporary variable if E is not an LValue.
Anders Carlsson3b227bd2010-02-03 16:38:03 +00001159 RValue EmitReferenceBindingToExpr(const Expr* E, bool IsInitializer = false);
Anders Carlssonab0ddb52010-01-31 18:34:51 +00001160
Chris Lattner6278e6a2007-08-11 00:04:45 +00001161 //===--------------------------------------------------------------------===//
Chris Lattnerbda69f82007-08-26 23:13:56 +00001162 // Expression Emission
Chris Lattner6278e6a2007-08-11 00:04:45 +00001163 //===--------------------------------------------------------------------===//
Chris Lattnerbda69f82007-08-26 23:13:56 +00001164
1165 // Expressions are broken into three classes: scalar, complex, aggregate.
Mike Stumpfc496822009-02-08 23:14:22 +00001166
1167 /// EmitScalarExpr - Emit the computation of the specified expression of LLVM
1168 /// scalar type, returning the result.
Anders Carlsson5b106a72009-08-16 07:36:22 +00001169 llvm::Value *EmitScalarExpr(const Expr *E , bool IgnoreResultAssign = false);
Mike Stumpfc496822009-02-08 23:14:22 +00001170
Chris Lattner3474c202007-08-26 06:48:56 +00001171 /// EmitScalarConversion - Emit a conversion from the specified type to the
1172 /// specified destination type, both of which are LLVM scalar types.
1173 llvm::Value *EmitScalarConversion(llvm::Value *Src, QualType SrcTy,
1174 QualType DstTy);
Mike Stumpfc496822009-02-08 23:14:22 +00001175
Chris Lattner42e6b812007-08-26 16:34:22 +00001176 /// EmitComplexToScalarConversion - Emit a conversion from the specified
Mike Stumpfc496822009-02-08 23:14:22 +00001177 /// complex type to the specified destination type, where the destination type
1178 /// is an LLVM scalar type.
Chris Lattner42e6b812007-08-26 16:34:22 +00001179 llvm::Value *EmitComplexToScalarConversion(ComplexPairTy Src, QualType SrcTy,
1180 QualType DstTy);
Mike Stumpfc496822009-02-08 23:14:22 +00001181
1182
Chris Lattner6278e6a2007-08-11 00:04:45 +00001183 /// EmitAggExpr - Emit the computation of the specified expression of
1184 /// aggregate type. The result is computed into DestPtr. Note that if
1185 /// DestPtr is null, the value of the aggregate expression is not needed.
Mike Stumpec3cbfe2009-05-26 22:03:21 +00001186 void EmitAggExpr(const Expr *E, llvm::Value *DestPtr, bool VolatileDest,
Fariborz Jahanian879d7262009-08-31 19:33:16 +00001187 bool IgnoreResult = false, bool IsInitializer = false,
1188 bool RequiresGCollection = false);
Mike Stumpfc496822009-02-08 23:14:22 +00001189
Daniel Dunbard0bc7b92010-02-05 19:38:31 +00001190 /// EmitAggExprToLValue - Emit the computation of the specified expression of
1191 /// aggregate type into a temporary LValue.
1192 LValue EmitAggExprToLValue(const Expr *E);
1193
Fariborz Jahanian5f21d2f2009-07-08 01:18:33 +00001194 /// EmitGCMemmoveCollectable - Emit special API for structs with object
1195 /// pointers.
1196 void EmitGCMemmoveCollectable(llvm::Value *DestPtr, llvm::Value *SrcPtr,
Fariborz Jahanian879d7262009-08-31 19:33:16 +00001197 QualType Ty);
Fariborz Jahanian5f21d2f2009-07-08 01:18:33 +00001198
Chris Lattnercbfc73b2007-08-21 05:54:00 +00001199 /// EmitComplexExpr - Emit the computation of the specified expression of
Chris Lattner08b15df2007-08-23 23:43:33 +00001200 /// complex type, returning the result.
Mike Stumpdf0fe272009-05-29 15:46:01 +00001201 ComplexPairTy EmitComplexExpr(const Expr *E, bool IgnoreReal = false,
1202 bool IgnoreImag = false,
1203 bool IgnoreRealAssign = false,
1204 bool IgnoreImagAssign = false);
Mike Stumpfc496822009-02-08 23:14:22 +00001205
Chris Lattner08b15df2007-08-23 23:43:33 +00001206 /// EmitComplexExprIntoAddr - Emit the computation of the specified expression
1207 /// of complex type, storing into the specified Value*.
Chris Lattnerb84bb952007-08-26 16:22:13 +00001208 void EmitComplexExprIntoAddr(const Expr *E, llvm::Value *DestAddr,
1209 bool DestIsVolatile);
Daniel Dunbar4b8c6db2008-08-30 05:35:15 +00001210
1211 /// StoreComplexToAddr - Store a complex number into the specified address.
1212 void StoreComplexToAddr(ComplexPairTy V, llvm::Value *DestAddr,
1213 bool DestIsVolatile);
Chris Lattner4647a212007-08-31 22:49:20 +00001214 /// LoadComplexFromAddr - Load a complex number from the specified address.
1215 ComplexPairTy LoadComplexFromAddr(llvm::Value *SrcAddr, bool SrcIsVolatile);
Chris Lattnerb781dc792008-05-08 05:58:21 +00001216
Mike Stumpe5311b02009-11-30 20:08:49 +00001217 /// CreateStaticBlockVarDecl - Create a zero-initialized LLVM global for a
1218 /// static block var decl.
Chris Lattnere99c1102009-12-05 08:22:11 +00001219 llvm::GlobalVariable *CreateStaticBlockVarDecl(const VarDecl &D,
1220 const char *Separator,
Mike Stumpe5311b02009-11-30 20:08:49 +00001221 llvm::GlobalValue::LinkageTypes Linkage);
Chris Lattnere99c1102009-12-05 08:22:11 +00001222
1223 /// AddInitializerToGlobalBlockVarDecl - Add the initializer for 'D' to the
1224 /// global variable that has already been created for it. If the initializer
1225 /// has a different type than GV does, this may free GV and return a different
1226 /// one. Otherwise it just returns GV.
1227 llvm::GlobalVariable *
1228 AddInitializerToGlobalBlockVarDecl(const VarDecl &D,
1229 llvm::GlobalVariable *GV);
1230
Daniel Dunbar22a87f92009-02-25 19:24:29 +00001231
Mike Stumpe5311b02009-11-30 20:08:49 +00001232 /// EmitStaticCXXBlockVarDeclInit - Create the initializer for a C++ runtime
1233 /// initialized static block var decl.
Anders Carlssonf40886a2009-08-08 21:45:14 +00001234 void EmitStaticCXXBlockVarDeclInit(const VarDecl &D,
1235 llvm::GlobalVariable *GV);
Anders Carlsson87fc5a52008-08-22 16:00:37 +00001236
Anders Carlssonf40886a2009-08-08 21:45:14 +00001237 /// EmitCXXGlobalVarDeclInit - Create the initializer for a C++
1238 /// variable with global storage.
1239 void EmitCXXGlobalVarDeclInit(const VarDecl &D, llvm::Constant *DeclPtr);
1240
1241 /// EmitCXXGlobalDtorRegistration - Emits a call to register the global ptr
1242 /// with the C++ runtime so that its destructor will be called at exit.
Fariborz Jahanian1254a092009-11-10 19:24:06 +00001243 void EmitCXXGlobalDtorRegistration(llvm::Constant *DtorFn,
Anders Carlssonf40886a2009-08-08 21:45:14 +00001244 llvm::Constant *DeclPtr);
Mike Stump11289f42009-09-09 15:08:12 +00001245
Daniel Dunbarfe06df42010-03-20 04:15:41 +00001246 /// GenerateCXXGlobalInitFunc - Generates code for initializing global
1247 /// variables.
1248 void GenerateCXXGlobalInitFunc(llvm::Function *Fn,
1249 llvm::Constant **Decls,
1250 unsigned NumDecls);
1251
1252 /// GenerateCXXGlobalDtorFunc - Generates code for destroying global
1253 /// variables.
1254 void GenerateCXXGlobalDtorFunc(llvm::Function *Fn,
1255 const std::vector<std::pair<llvm::Constant*,
1256 llvm::Constant*> > &DtorsAndObjects);
1257
1258 void GenerateCXXGlobalVarDeclInitFunc(llvm::Function *Fn, const VarDecl *D);
1259
Anders Carlsson1619a5042009-05-03 17:47:16 +00001260 void EmitCXXConstructExpr(llvm::Value *Dest, const CXXConstructExpr *E);
Mike Stump11289f42009-09-09 15:08:12 +00001261
Anders Carlsson3be22e22009-05-30 23:23:33 +00001262 RValue EmitCXXExprWithTemporaries(const CXXExprWithTemporaries *E,
Mike Stump11289f42009-09-09 15:08:12 +00001263 llvm::Value *AggLoc = 0,
Anders Carlsson5b106a72009-08-16 07:36:22 +00001264 bool IsAggLocVolatile = false,
1265 bool IsInitializer = false);
Mike Stump11289f42009-09-09 15:08:12 +00001266
Anders Carlsson4b08db72009-10-30 01:42:31 +00001267 void EmitCXXThrowExpr(const CXXThrowExpr *E);
Douglas Gregorc278d1b2010-05-16 00:44:00 +00001268
Daniel Dunbar88402ce2008-08-04 16:51:22 +00001269 //===--------------------------------------------------------------------===//
1270 // Internal Helpers
1271 //===--------------------------------------------------------------------===//
Mike Stumpfc496822009-02-08 23:14:22 +00001272
Chris Lattner5b1964b2008-11-11 07:41:27 +00001273 /// ContainsLabel - Return true if the statement contains a label in it. If
1274 /// this statement is not executed normally, it not containing a label means
1275 /// that we can just remove the code.
1276 static bool ContainsLabel(const Stmt *S, bool IgnoreCaseStmts = false);
Mike Stumpfc496822009-02-08 23:14:22 +00001277
Daniel Dunbar682712c2008-11-12 10:12:14 +00001278 /// ConstantFoldsToSimpleInteger - If the specified expression does not fold
Chris Lattnercd439292008-11-12 08:04:58 +00001279 /// to a constant, or if it does but contains a label, return 0. If it
1280 /// constant folds to 'true' and does not contain a label, return 1, if it
1281 /// constant folds to 'false' and does not contain a label, return -1.
1282 int ConstantFoldsToSimpleInteger(const Expr *Cond);
Mike Stumpfc496822009-02-08 23:14:22 +00001283
Chris Lattnercd439292008-11-12 08:04:58 +00001284 /// EmitBranchOnBoolExpr - Emit a branch on a boolean condition (e.g. for an
1285 /// if statement) to the specified blocks. Based on the condition, this might
1286 /// try to simplify the codegen of the conditional based on the branch.
Chris Lattnerb7a9e162008-11-12 07:46:33 +00001287 void EmitBranchOnBoolExpr(const Expr *Cond, llvm::BasicBlock *TrueBlock,
Daniel Dunbar682712c2008-11-12 10:12:14 +00001288 llvm::BasicBlock *FalseBlock);
Mike Stumpba6a0c42009-12-14 21:58:14 +00001289
Mike Stumpe8c3b3e2009-12-15 00:35:12 +00001290 /// getTrapBB - Create a basic block that will call the trap intrinsic. We'll
1291 /// generate a branch around the created basic block as necessary.
1292 llvm::BasicBlock* getTrapBB();
Anders Carlsson093bdff2010-03-30 03:27:09 +00001293
1294 /// EmitCallArg - Emit a single call argument.
1295 RValue EmitCallArg(const Expr *E, QualType ArgType);
1296
Chris Lattnercd439292008-11-12 08:04:58 +00001297private:
Mike Stumpfc496822009-02-08 23:14:22 +00001298
Daniel Dunbar1c64e5d2008-09-24 04:00:38 +00001299 void EmitReturnOfRValue(RValue RV, QualType Ty);
1300
Daniel Dunbar8fc81b02008-09-17 00:51:38 +00001301 /// ExpandTypeFromArgs - Reconstruct a structure of type \arg Ty
1302 /// from function arguments into \arg Dst. See ABIArgInfo::Expand.
1303 ///
1304 /// \param AI - The first function argument of the expansion.
1305 /// \return The argument following the last expanded function
1306 /// argument.
Mike Stumpfc496822009-02-08 23:14:22 +00001307 llvm::Function::arg_iterator
Daniel Dunbar8fc81b02008-09-17 00:51:38 +00001308 ExpandTypeFromArgs(QualType Ty, LValue Dst,
1309 llvm::Function::arg_iterator AI);
1310
Mike Stumpfc496822009-02-08 23:14:22 +00001311 /// ExpandTypeToArgs - Expand an RValue \arg Src, with the LLVM type for \arg
1312 /// Ty, into individual arguments on the provided vector \arg Args. See
1313 /// ABIArgInfo::Expand.
1314 void ExpandTypeToArgs(QualType Ty, RValue Src,
Daniel Dunbar8fc81b02008-09-17 00:51:38 +00001315 llvm::SmallVector<llvm::Value*, 16> &Args);
Anders Carlsson03aaf112009-01-11 19:40:10 +00001316
Mike Stump11289f42009-09-09 15:08:12 +00001317 llvm::Value* EmitAsmInput(const AsmStmt &S,
Daniel Dunbard53e07b2009-05-04 06:56:16 +00001318 const TargetInfo::ConstraintInfo &Info,
Anders Carlsson03aaf112009-01-11 19:40:10 +00001319 const Expr *InputExpr, std::string &ConstraintStr);
Mike Stumpfc496822009-02-08 23:14:22 +00001320
Anders Carlssonbe0f76a2009-02-07 23:50:39 +00001321 /// EmitCleanupBlock - emits a single cleanup block.
1322 void EmitCleanupBlock();
1323
Anders Carlsson7d70fd22009-02-08 00:50:42 +00001324 /// AddBranchFixup - adds a branch instruction to the list of fixups for the
1325 /// current cleanup scope.
1326 void AddBranchFixup(llvm::BranchInst *BI);
Mike Stumpfc496822009-02-08 23:14:22 +00001327
Anders Carlsson60ce3fe2009-04-08 20:47:54 +00001328 /// EmitCallArgs - Emit call arguments for a function.
Mike Stump11289f42009-09-09 15:08:12 +00001329 /// The CallArgTypeInfo parameter is used for iterating over the known
Anders Carlsson603d6af2009-04-18 20:20:22 +00001330 /// argument types of the function being called.
1331 template<typename T>
1332 void EmitCallArgs(CallArgList& Args, const T* CallArgTypeInfo,
Anders Carlsson60ce3fe2009-04-08 20:47:54 +00001333 CallExpr::const_arg_iterator ArgBeg,
Anders Carlsson603d6af2009-04-18 20:20:22 +00001334 CallExpr::const_arg_iterator ArgEnd) {
1335 CallExpr::const_arg_iterator Arg = ArgBeg;
Anders Carlsson60ce3fe2009-04-08 20:47:54 +00001336
Anders Carlsson603d6af2009-04-18 20:20:22 +00001337 // First, use the argument types that the type info knows about
1338 if (CallArgTypeInfo) {
1339 for (typename T::arg_type_iterator I = CallArgTypeInfo->arg_type_begin(),
1340 E = CallArgTypeInfo->arg_type_end(); I != E; ++I, ++Arg) {
Eli Friedman794290c2009-11-18 03:42:04 +00001341 assert(Arg != ArgEnd && "Running over edge of argument list!");
Anders Carlsson603d6af2009-04-18 20:20:22 +00001342 QualType ArgType = *I;
1343
1344 assert(getContext().getCanonicalType(ArgType.getNonReferenceType()).
Mike Stump11289f42009-09-09 15:08:12 +00001345 getTypePtr() ==
1346 getContext().getCanonicalType(Arg->getType()).getTypePtr() &&
Anders Carlsson603d6af2009-04-18 20:20:22 +00001347 "type mismatch in call argument!");
Mike Stump11289f42009-09-09 15:08:12 +00001348
1349 Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType),
Anders Carlsson603d6af2009-04-18 20:20:22 +00001350 ArgType));
1351 }
Mike Stump11289f42009-09-09 15:08:12 +00001352
1353 // Either we've emitted all the call args, or we have a call to a
Anders Carlsson603d6af2009-04-18 20:20:22 +00001354 // variadic function.
Mike Stump11289f42009-09-09 15:08:12 +00001355 assert((Arg == ArgEnd || CallArgTypeInfo->isVariadic()) &&
Anders Carlsson603d6af2009-04-18 20:20:22 +00001356 "Extra arguments in non-variadic function!");
Mike Stump11289f42009-09-09 15:08:12 +00001357
Anders Carlsson603d6af2009-04-18 20:20:22 +00001358 }
Mike Stump11289f42009-09-09 15:08:12 +00001359
Anders Carlsson603d6af2009-04-18 20:20:22 +00001360 // If we still have any arguments, emit them using the type of the argument.
1361 for (; Arg != ArgEnd; ++Arg) {
1362 QualType ArgType = Arg->getType();
1363 Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType),
1364 ArgType));
1365 }
1366 }
John McCalld4f4b7f2010-03-03 04:15:11 +00001367
1368 const TargetCodeGenInfo &getTargetHooks() const {
1369 return CGM.getTargetCodeGenInfo();
1370 }
Chris Lattnerbed31442007-05-28 01:07:47 +00001371};
Mike Stump11289f42009-09-09 15:08:12 +00001372
Anders Carlsson603d6af2009-04-18 20:20:22 +00001373
Chris Lattnerbed31442007-05-28 01:07:47 +00001374} // end namespace CodeGen
1375} // end namespace clang
Chris Lattnerbed31442007-05-28 01:07:47 +00001376
1377#endif