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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;
Reid Spencer5f016e22007-07-11 17:01:13 +000035 class Module;
Daniel Dunbar898d5082008-09-30 01:06:03 +000036 class SwitchInst;
Daniel Dunbar259e9cc2009-10-19 01:21:05 +000037 class Twine;
Daniel Dunbared3849b2008-11-19 09:36:46 +000038 class Value;
Reid Spencer5f016e22007-07-11 17:01:13 +000039}
40
41namespace clang {
42 class ASTContext;
Anders Carlsson7267c162009-05-29 21:03:38 +000043 class CXXDestructorDecl;
Anders Carlsson6815e942009-09-27 18:58:34 +000044 class CXXTryStmt;
Reid Spencer5f016e22007-07-11 17:01:13 +000045 class Decl;
Daniel Dunbarc4a1dea2008-08-11 05:35:13 +000046 class EnumConstantDecl;
Reid Spencer5f016e22007-07-11 17:01:13 +000047 class FunctionDecl;
Douglas Gregor72564e72009-02-26 23:50:07 +000048 class FunctionProtoType;
Daniel Dunbarc4a1dea2008-08-11 05:35:13 +000049 class LabelStmt;
Fariborz Jahanian679a5022009-01-10 21:06:09 +000050 class ObjCContainerDecl;
Daniel Dunbar29e0bcc2008-09-24 04:00:38 +000051 class ObjCInterfaceDecl;
52 class ObjCIvarDecl;
Chris Lattner391d77a2008-03-30 23:03:07 +000053 class ObjCMethodDecl;
Fariborz Jahanianfef30b52008-12-09 20:23:04 +000054 class ObjCImplementationDecl;
Daniel Dunbaraf05bb92008-08-26 08:29:31 +000055 class ObjCPropertyImplDecl;
Reid Spencer5f016e22007-07-11 17:01:13 +000056 class TargetInfo;
John McCall492c4f92010-03-03 04:15:11 +000057 class TargetCodeGenInfo;
Daniel Dunbarc4a1dea2008-08-11 05:35:13 +000058 class VarDecl;
Chris Lattner16f00492009-04-26 01:32:48 +000059 class ObjCForCollectionStmt;
60 class ObjCAtTryStmt;
61 class ObjCAtThrowStmt;
62 class ObjCAtSynchronizedStmt;
Devang Patelb84a06e2007-10-23 02:10:49 +000063
Reid Spencer5f016e22007-07-11 17:01:13 +000064namespace CodeGen {
Devang Patelb84a06e2007-10-23 02:10:49 +000065 class CodeGenTypes;
Anders Carlssone896d982009-02-13 08:11:52 +000066 class CGDebugInfo;
Daniel Dunbarbb36d332009-02-02 21:43:58 +000067 class CGFunctionInfo;
Mike Stump0dd9e882009-02-08 23:14:22 +000068 class CGRecordLayout;
69
Reid Spencer5f016e22007-07-11 17:01:13 +000070/// CodeGenFunction - This class organizes the per-function state that is used
71/// while generating LLVM code.
Mike Stump2a998142009-03-04 18:17:45 +000072class CodeGenFunction : public BlockFunction {
Anders Carlsson8a219ce2009-02-24 04:21:31 +000073 CodeGenFunction(const CodeGenFunction&); // DO NOT IMPLEMENT
74 void operator=(const CodeGenFunction&); // DO NOT IMPLEMENT
Chris Lattnerbfc0c1a2007-08-26 23:13:56 +000075public:
Reid Spencer5f016e22007-07-11 17:01:13 +000076 CodeGenModule &CGM; // Per-module state.
Daniel Dunbar444be732009-11-13 05:51:54 +000077 const TargetInfo &Target;
Mike Stump0dd9e882009-02-08 23:14:22 +000078
Chris Lattner58dee102007-08-21 16:57:55 +000079 typedef std::pair<llvm::Value *, llvm::Value *> ComplexPairTy;
Daniel Dunbar45d196b2008-11-01 01:53:16 +000080 CGBuilderTy Builder;
Mike Stump0dd9e882009-02-08 23:14:22 +000081
Chris Lattnerb5437d22009-04-23 05:30:27 +000082 /// CurFuncDecl - Holds the Decl for the current function or ObjC method.
83 /// This excludes BlockDecls.
Chris Lattner41110242008-06-17 18:05:57 +000084 const Decl *CurFuncDecl;
Chris Lattnerb5437d22009-04-23 05:30:27 +000085 /// CurCodeDecl - This is the inner-most code context, which includes blocks.
86 const Decl *CurCodeDecl;
Daniel Dunbar88b53962009-02-02 22:03:45 +000087 const CGFunctionInfo *CurFnInfo;
Chris Lattner391d77a2008-03-30 23:03:07 +000088 QualType FnRetTy;
Reid Spencer5f016e22007-07-11 17:01:13 +000089 llvm::Function *CurFn;
90
Mike Stump6a1e0eb2009-12-04 23:26:17 +000091 /// CurGD - The GlobalDecl for the current function being compiled.
92 GlobalDecl CurGD;
Mike Stump6a1e0eb2009-12-04 23:26:17 +000093
Daniel Dunbar5ca20842008-09-09 21:00:17 +000094 /// ReturnBlock - Unified return block.
95 llvm::BasicBlock *ReturnBlock;
Mike Stump0dd9e882009-02-08 23:14:22 +000096 /// ReturnValue - The temporary alloca to hold the return value. This is null
97 /// iff the function has no return value.
Eli Friedmanb17daf92009-12-04 02:43:40 +000098 llvm::Value *ReturnValue;
Mike Stump0dd9e882009-02-08 23:14:22 +000099
Reid Spencer5f016e22007-07-11 17:01:13 +0000100 /// AllocaInsertPoint - This is an instruction in the entry block before which
101 /// we prefer to insert allocas.
Chris Lattner481769b2009-03-31 22:17:44 +0000102 llvm::AssertingVH<llvm::Instruction> AllocaInsertPt;
Daniel Dunbar0ffb1252008-08-04 16:51:22 +0000103
Reid Spencer5f016e22007-07-11 17:01:13 +0000104 const llvm::Type *LLVMIntTy;
Hartmut Kaiser7b660002007-10-17 15:00:17 +0000105 uint32_t LLVMPointerWidth;
Daniel Dunbar18ccc772008-09-28 01:03:14 +0000106
Mike Stumpd88ea562009-12-09 03:35:49 +0000107 bool Exceptions;
Mike Stump9c276ae2009-12-12 01:27:46 +0000108 bool CatchUndefined;
Daniel Dunbar18ccc772008-09-28 01:03:14 +0000109public:
Anders Carlssonfa1f7562009-02-10 06:07:49 +0000110 /// ObjCEHValueStack - Stack of Objective-C exception values, used for
111 /// rethrows.
Anders Carlsson273558f2009-02-07 21:37:21 +0000112 llvm::SmallVector<llvm::Value*, 8> ObjCEHValueStack;
Mike Stump0dd9e882009-02-08 23:14:22 +0000113
Anders Carlsson6fc55912009-02-08 03:22:36 +0000114 /// PushCleanupBlock - Push a new cleanup entry on the stack and set the
115 /// passed in block as the cleanup block.
Fariborz Jahanian77996212009-11-04 17:57:40 +0000116 void PushCleanupBlock(llvm::BasicBlock *CleanupEntryBlock,
Mike Stumpd88ea562009-12-09 03:35:49 +0000117 llvm::BasicBlock *CleanupExitBlock,
118 llvm::BasicBlock *PreviousInvokeDest,
Mike Stump99533832009-12-02 07:41:41 +0000119 bool EHOnly = false);
Mike Stumpd88ea562009-12-09 03:35:49 +0000120 void PushCleanupBlock(llvm::BasicBlock *CleanupEntryBlock) {
121 PushCleanupBlock(CleanupEntryBlock, 0, getInvokeDest(), false);
122 }
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000123
Mike Stump0dd9e882009-02-08 23:14:22 +0000124 /// CleanupBlockInfo - A struct representing a popped cleanup block.
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000125 struct CleanupBlockInfo {
Fariborz Jahanian77996212009-11-04 17:57:40 +0000126 /// CleanupEntryBlock - the cleanup entry block
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000127 llvm::BasicBlock *CleanupBlock;
Mike Stump0dd9e882009-02-08 23:14:22 +0000128
129 /// SwitchBlock - the block (if any) containing the switch instruction used
130 /// for jumping to the final destination.
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000131 llvm::BasicBlock *SwitchBlock;
Mike Stump0dd9e882009-02-08 23:14:22 +0000132
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000133 /// EndBlock - the default destination for the switch instruction.
134 llvm::BasicBlock *EndBlock;
Mike Stump0dd9e882009-02-08 23:14:22 +0000135
Mike Stump99533832009-12-02 07:41:41 +0000136 /// EHOnly - True iff this cleanup should only be performed on the
137 /// exceptional edge.
138 bool EHOnly;
139
Mike Stump0dd9e882009-02-08 23:14:22 +0000140 CleanupBlockInfo(llvm::BasicBlock *cb, llvm::BasicBlock *sb,
Mike Stump99533832009-12-02 07:41:41 +0000141 llvm::BasicBlock *eb, bool ehonly = false)
142 : CleanupBlock(cb), SwitchBlock(sb), EndBlock(eb), EHOnly(ehonly) {}
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000143 };
144
Mike Stumpd88ea562009-12-09 03:35:49 +0000145 /// EHCleanupBlock - RAII object that will create a cleanup block for the
146 /// exceptional edge and set the insert point to that block. When destroyed,
147 /// it creates the cleanup edge and sets the insert point to the previous
148 /// block.
149 class EHCleanupBlock {
150 CodeGenFunction& CGF;
151 llvm::BasicBlock *Cont;
152 llvm::BasicBlock *CleanupHandler;
153 llvm::BasicBlock *CleanupEntryBB;
154 llvm::BasicBlock *PreviousInvokeDest;
155 public:
156 EHCleanupBlock(CodeGenFunction &cgf)
157 : CGF(cgf), Cont(CGF.createBasicBlock("cont")),
158 CleanupHandler(CGF.createBasicBlock("ehcleanup")),
159 CleanupEntryBB(CGF.createBasicBlock("ehcleanup.rest")),
160 PreviousInvokeDest(CGF.getInvokeDest()) {
161 CGF.EmitBranch(Cont);
Mike Stump20d3a532009-12-09 23:49:53 +0000162 llvm::BasicBlock *TerminateHandler = CGF.getTerminateHandler();
Mike Stumpd88ea562009-12-09 03:35:49 +0000163 CGF.Builder.SetInsertPoint(CleanupEntryBB);
Mike Stump20d3a532009-12-09 23:49:53 +0000164 CGF.setInvokeDest(TerminateHandler);
Mike Stumpd88ea562009-12-09 03:35:49 +0000165 }
166 ~EHCleanupBlock();
167 };
168
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000169 /// PopCleanupBlock - Will pop the cleanup entry on the stack, process all
Mike Stump0dd9e882009-02-08 23:14:22 +0000170 /// branch fixups and return a block info struct with the switch block and end
Mike Stumpd88ea562009-12-09 03:35:49 +0000171 /// block. This will also reset the invoke handler to the previous value
172 /// from when the cleanup block was created.
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000173 CleanupBlockInfo PopCleanupBlock();
Mike Stump0dd9e882009-02-08 23:14:22 +0000174
Mike Stumpf71d2322009-11-30 20:08:49 +0000175 /// DelayedCleanupBlock - RAII object that will create a cleanup block and set
176 /// the insert point to that block. When destructed, it sets the insert point
177 /// to the previous block and pushes a new cleanup entry on the stack.
Douglas Gregord5782d52009-11-24 16:21:10 +0000178 class DelayedCleanupBlock {
Anders Carlsson0d5c6852009-02-07 23:30:41 +0000179 CodeGenFunction& CGF;
180 llvm::BasicBlock *CurBB;
Fariborz Jahanian77996212009-11-04 17:57:40 +0000181 llvm::BasicBlock *CleanupEntryBB;
182 llvm::BasicBlock *CleanupExitBB;
Mike Stumpd88ea562009-12-09 03:35:49 +0000183 llvm::BasicBlock *CurInvokeDest;
Mike Stump99533832009-12-02 07:41:41 +0000184 bool EHOnly;
Fariborz Jahanian77996212009-11-04 17:57:40 +0000185
Anders Carlsson0d5c6852009-02-07 23:30:41 +0000186 public:
Mike Stump99533832009-12-02 07:41:41 +0000187 DelayedCleanupBlock(CodeGenFunction &cgf, bool ehonly = false)
Fariborz Jahanian77996212009-11-04 17:57:40 +0000188 : CGF(cgf), CurBB(CGF.Builder.GetInsertBlock()),
Mike Stumpd88ea562009-12-09 03:35:49 +0000189 CleanupEntryBB(CGF.createBasicBlock("cleanup")), CleanupExitBB(0),
190 CurInvokeDest(CGF.getInvokeDest()),
191 EHOnly(ehonly) {
Fariborz Jahanian77996212009-11-04 17:57:40 +0000192 CGF.Builder.SetInsertPoint(CleanupEntryBB);
Anders Carlsson0d5c6852009-02-07 23:30:41 +0000193 }
Mike Stump0dd9e882009-02-08 23:14:22 +0000194
Fariborz Jahanian77996212009-11-04 17:57:40 +0000195 llvm::BasicBlock *getCleanupExitBlock() {
196 if (!CleanupExitBB)
197 CleanupExitBB = CGF.createBasicBlock("cleanup.exit");
198 return CleanupExitBB;
199 }
200
Douglas Gregord5782d52009-11-24 16:21:10 +0000201 ~DelayedCleanupBlock() {
Mike Stumpd88ea562009-12-09 03:35:49 +0000202 CGF.PushCleanupBlock(CleanupEntryBB, CleanupExitBB, CurInvokeDest,
203 EHOnly);
Daniel Dunbard286f052009-07-19 06:58:07 +0000204 // FIXME: This is silly, move this into the builder.
205 if (CurBB)
206 CGF.Builder.SetInsertPoint(CurBB);
207 else
208 CGF.Builder.ClearInsertionPoint();
Anders Carlsson0d5c6852009-02-07 23:30:41 +0000209 }
210 };
211
Douglas Gregor01234bb2009-11-24 16:43:22 +0000212 /// \brief Enters a new scope for capturing cleanups, all of which will be
213 /// executed once the scope is exited.
214 class CleanupScope {
215 CodeGenFunction& CGF;
216 size_t CleanupStackDepth;
217 bool OldDidCallStackSave;
Douglas Gregor5656e142009-11-24 21:15:44 +0000218 bool PerformCleanup;
Douglas Gregor01234bb2009-11-24 16:43:22 +0000219
220 CleanupScope(const CleanupScope &); // DO NOT IMPLEMENT
221 CleanupScope &operator=(const CleanupScope &); // DO NOT IMPLEMENT
222
223 public:
224 /// \brief Enter a new cleanup scope.
Douglas Gregor5656e142009-11-24 21:15:44 +0000225 explicit CleanupScope(CodeGenFunction &CGF)
226 : CGF(CGF), PerformCleanup(true)
227 {
Douglas Gregor01234bb2009-11-24 16:43:22 +0000228 CleanupStackDepth = CGF.CleanupEntries.size();
229 OldDidCallStackSave = CGF.DidCallStackSave;
230 }
231
232 /// \brief Exit this cleanup scope, emitting any accumulated
233 /// cleanups.
234 ~CleanupScope() {
Douglas Gregor5656e142009-11-24 21:15:44 +0000235 if (PerformCleanup) {
236 CGF.DidCallStackSave = OldDidCallStackSave;
237 CGF.EmitCleanupBlocks(CleanupStackDepth);
238 }
239 }
240
241 /// \brief Determine whether this scope requires any cleanups.
242 bool requiresCleanups() const {
243 return CGF.CleanupEntries.size() > CleanupStackDepth;
244 }
245
246 /// \brief Force the emission of cleanups now, instead of waiting
247 /// until this object is destroyed.
248 void ForceCleanup() {
249 assert(PerformCleanup && "Already forced cleanup");
Douglas Gregor01234bb2009-11-24 16:43:22 +0000250 CGF.DidCallStackSave = OldDidCallStackSave;
251 CGF.EmitCleanupBlocks(CleanupStackDepth);
Douglas Gregor5656e142009-11-24 21:15:44 +0000252 PerformCleanup = false;
Douglas Gregor01234bb2009-11-24 16:43:22 +0000253 }
254 };
255
Anders Carlsson44ec82b2010-03-30 03:14:41 +0000256 /// CXXTemporariesCleanupScope - Enters a new scope for catching live
257 /// temporaries, all of which will be popped once the scope is exited.
258 class CXXTemporariesCleanupScope {
259 CodeGenFunction &CGF;
260 size_t NumLiveTemporaries;
261
262 // DO NOT IMPLEMENT
263 CXXTemporariesCleanupScope(const CXXTemporariesCleanupScope &);
264 CXXTemporariesCleanupScope &operator=(const CXXTemporariesCleanupScope &);
265
266 public:
267 explicit CXXTemporariesCleanupScope(CodeGenFunction &CGF)
268 : CGF(CGF), NumLiveTemporaries(CGF.LiveTemporaries.size()) { }
269
270 ~CXXTemporariesCleanupScope() {
271 while (CGF.LiveTemporaries.size() > NumLiveTemporaries)
272 CGF.PopCXXTemporary();
273 }
274 };
275
276
Anders Carlssonc71c8452009-02-07 23:50:39 +0000277 /// EmitCleanupBlocks - Takes the old cleanup stack size and emits the cleanup
278 /// blocks that have been added.
279 void EmitCleanupBlocks(size_t OldCleanupStackSize);
280
Anders Carlsson87eaf172009-02-08 00:50:42 +0000281 /// EmitBranchThroughCleanup - Emit a branch from the current insert block
282 /// through the cleanup handling code (if any) and then on to \arg Dest.
283 ///
Mike Stump0dd9e882009-02-08 23:14:22 +0000284 /// FIXME: Maybe this should really be in EmitBranch? Don't we always want
Anders Carlsson87eaf172009-02-08 00:50:42 +0000285 /// this behavior for branches?
286 void EmitBranchThroughCleanup(llvm::BasicBlock *Dest);
Mike Stump0dd9e882009-02-08 23:14:22 +0000287
Anders Carlsson72119a82010-02-04 17:18:07 +0000288 /// BeginConditionalBranch - Should be called before a conditional part of an
Anders Carlssona36bf8f2009-11-20 17:27:56 +0000289 /// expression is emitted. For example, before the RHS of the expression below
290 /// is emitted:
Mike Stump1eb44332009-09-09 15:08:12 +0000291 ///
Anders Carlsson1d847502009-06-04 02:22:12 +0000292 /// b && f(T());
293 ///
Anders Carlssona36bf8f2009-11-20 17:27:56 +0000294 /// This is used to make sure that any temporaries created in the conditional
Anders Carlsson1d847502009-06-04 02:22:12 +0000295 /// branch are only destroyed if the branch is taken.
Anders Carlsson72119a82010-02-04 17:18:07 +0000296 void BeginConditionalBranch() {
Anders Carlssona36bf8f2009-11-20 17:27:56 +0000297 ++ConditionalBranchLevel;
298 }
Mike Stump1eb44332009-09-09 15:08:12 +0000299
Anders Carlsson72119a82010-02-04 17:18:07 +0000300 /// EndConditionalBranch - Should be called after a conditional part of an
Anders Carlssona36bf8f2009-11-20 17:27:56 +0000301 /// expression has been emitted.
Anders Carlsson72119a82010-02-04 17:18:07 +0000302 void EndConditionalBranch() {
Anders Carlsson08e9e452010-01-24 00:20:05 +0000303 assert(ConditionalBranchLevel != 0 &&
304 "Conditional branch mismatch!");
305
Anders Carlssona36bf8f2009-11-20 17:27:56 +0000306 --ConditionalBranchLevel;
307 }
Mike Stump1eb44332009-09-09 15:08:12 +0000308
Chris Lattner7f02f722007-08-24 05:35:26 +0000309private:
Chris Lattnerd9becd12009-10-28 23:59:40 +0000310 CGDebugInfo *DebugInfo;
Mike Stump09429b92009-02-17 17:00:02 +0000311
Mike Stumpf71d2322009-11-30 20:08:49 +0000312 /// IndirectBranch - The first time an indirect goto is seen we create a block
313 /// with an indirect branch. Every time we see the address of a label taken,
314 /// we add the label to the indirect goto. Every subsequent indirect goto is
315 /// codegen'd as a jump to the IndirectBranch's basic block.
Chris Lattnerd9becd12009-10-28 23:59:40 +0000316 llvm::IndirectBrInst *IndirectBranch;
Daniel Dunbar0ffb1252008-08-04 16:51:22 +0000317
Mike Stump0dd9e882009-02-08 23:14:22 +0000318 /// LocalDeclMap - This keeps track of the LLVM allocas or globals for local C
319 /// decls.
Reid Spencer5f016e22007-07-11 17:01:13 +0000320 llvm::DenseMap<const Decl*, llvm::Value*> LocalDeclMap;
321
322 /// LabelMap - This keeps track of the LLVM basic block for each C label.
323 llvm::DenseMap<const LabelStmt*, llvm::BasicBlock*> LabelMap;
Mike Stump0dd9e882009-02-08 23:14:22 +0000324
Mike Stump0dd9e882009-02-08 23:14:22 +0000325 // BreakContinueStack - This keeps track of where break and continue
Anders Carlssone4b6d342009-02-10 05:52:02 +0000326 // statements should jump to.
Chris Lattnerda138702007-07-16 21:28:45 +0000327 struct BreakContinue {
Anders Carlssone4b6d342009-02-10 05:52:02 +0000328 BreakContinue(llvm::BasicBlock *bb, llvm::BasicBlock *cb)
329 : BreakBlock(bb), ContinueBlock(cb) {}
Mike Stump0dd9e882009-02-08 23:14:22 +0000330
Chris Lattnerda138702007-07-16 21:28:45 +0000331 llvm::BasicBlock *BreakBlock;
332 llvm::BasicBlock *ContinueBlock;
Mike Stump0dd9e882009-02-08 23:14:22 +0000333 };
Chris Lattnerda138702007-07-16 21:28:45 +0000334 llvm::SmallVector<BreakContinue, 8> BreakContinueStack;
Daniel Dunbar18ccc772008-09-28 01:03:14 +0000335
Mike Stump0dd9e882009-02-08 23:14:22 +0000336 /// SwitchInsn - This is nearest current switch instruction. It is null if if
337 /// current context is not in a switch.
Devang Patel51b09f22007-10-04 23:45:31 +0000338 llvm::SwitchInst *SwitchInsn;
339
Mike Stump0dd9e882009-02-08 23:14:22 +0000340 /// CaseRangeBlock - This block holds if condition check for last case
Devang Patel80fd5f92007-10-09 17:08:50 +0000341 /// statement range in current switch instruction.
Devang Patelc049e4f2007-10-08 20:57:48 +0000342 llvm::BasicBlock *CaseRangeBlock;
343
Daniel Dunbar9834ffb2009-02-23 17:26:39 +0000344 /// InvokeDest - This is the nearest exception target for calls
345 /// which can unwind, when exceptions are being used.
346 llvm::BasicBlock *InvokeDest;
347
Mike Stump0dd9e882009-02-08 23:14:22 +0000348 // VLASizeMap - This keeps track of the associated size for each VLA type.
Eli Friedmanbbed6b92009-08-15 02:50:32 +0000349 // We track this by the size expression rather than the type itself because
350 // in certain situations, like a const qualifier applied to an VLA typedef,
351 // multiple VLA types can share the same size expression.
Mike Stump0dd9e882009-02-08 23:14:22 +0000352 // FIXME: Maybe this could be a stack of maps that is pushed/popped as we
353 // enter/leave scopes.
Eli Friedmanbbed6b92009-08-15 02:50:32 +0000354 llvm::DenseMap<const Expr*, llvm::Value*> VLASizeMap;
Mike Stump0dd9e882009-02-08 23:14:22 +0000355
Anders Carlsson4cc1a472009-02-09 20:20:56 +0000356 /// DidCallStackSave - Whether llvm.stacksave has been called. Used to avoid
357 /// calling llvm.stacksave for multiple VLAs in the same scope.
358 bool DidCallStackSave;
Mike Stump09429b92009-02-17 17:00:02 +0000359
Anders Carlsson6ccc4762009-02-07 22:53:43 +0000360 struct CleanupEntry {
Fariborz Jahanian77996212009-11-04 17:57:40 +0000361 /// CleanupEntryBlock - The block of code that does the actual cleanup.
362 llvm::BasicBlock *CleanupEntryBlock;
Mike Stump0dd9e882009-02-08 23:14:22 +0000363
Fariborz Jahanian77996212009-11-04 17:57:40 +0000364 /// CleanupExitBlock - The cleanup exit block.
365 llvm::BasicBlock *CleanupExitBlock;
366
Anders Carlsson6ccc4762009-02-07 22:53:43 +0000367 /// Blocks - Basic blocks that were emitted in the current cleanup scope.
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000368 std::vector<llvm::BasicBlock *> Blocks;
Anders Carlsson6ccc4762009-02-07 22:53:43 +0000369
370 /// BranchFixups - Branch instructions to basic blocks that haven't been
371 /// inserted into the current function yet.
Anders Carlssonbb66f9f2009-02-08 07:46:24 +0000372 std::vector<llvm::BranchInst *> BranchFixups;
Anders Carlsson6ccc4762009-02-07 22:53:43 +0000373
Mike Stumpd88ea562009-12-09 03:35:49 +0000374 /// PreviousInvokeDest - The invoke handler from the start of the cleanup
375 /// region.
376 llvm::BasicBlock *PreviousInvokeDest;
377
Mike Stump99533832009-12-02 07:41:41 +0000378 /// EHOnly - Perform this only on the exceptional edge, not the main edge.
379 bool EHOnly;
380
Fariborz Jahanian77996212009-11-04 17:57:40 +0000381 explicit CleanupEntry(llvm::BasicBlock *CleanupEntryBlock,
Mike Stumpd88ea562009-12-09 03:35:49 +0000382 llvm::BasicBlock *CleanupExitBlock,
383 llvm::BasicBlock *PreviousInvokeDest,
384 bool ehonly)
385 : CleanupEntryBlock(CleanupEntryBlock),
Mike Stump99533832009-12-02 07:41:41 +0000386 CleanupExitBlock(CleanupExitBlock),
Mike Stumpd88ea562009-12-09 03:35:49 +0000387 PreviousInvokeDest(PreviousInvokeDest),
Mike Stump99533832009-12-02 07:41:41 +0000388 EHOnly(ehonly) {}
Anders Carlsson6ccc4762009-02-07 22:53:43 +0000389 };
Mike Stump0dd9e882009-02-08 23:14:22 +0000390
Anders Carlsson6ccc4762009-02-07 22:53:43 +0000391 /// CleanupEntries - Stack of cleanup entries.
392 llvm::SmallVector<CleanupEntry, 8> CleanupEntries;
393
Anders Carlssonbd6fa3d2009-02-08 00:16:35 +0000394 typedef llvm::DenseMap<llvm::BasicBlock*, size_t> BlockScopeMap;
395
396 /// BlockScopes - Map of which "cleanup scope" scope basic blocks have.
397 BlockScopeMap BlockScopes;
Mike Stump0dd9e882009-02-08 23:14:22 +0000398
Anders Carlssonf6c56e22009-11-25 03:15:49 +0000399 /// CXXThisDecl - When generating code for a C++ member function,
400 /// this will hold the implicit 'this' declaration.
Anders Carlsson2b77ba82009-04-04 20:47:02 +0000401 ImplicitParamDecl *CXXThisDecl;
John McCall25049412010-02-16 22:04:33 +0000402 llvm::Value *CXXThisValue;
Mike Stump1eb44332009-09-09 15:08:12 +0000403
Anders Carlssonf6c56e22009-11-25 03:15:49 +0000404 /// CXXVTTDecl - When generating code for a base object constructor or
405 /// base object destructor with virtual bases, this will hold the implicit
406 /// VTT parameter.
407 ImplicitParamDecl *CXXVTTDecl;
John McCall25049412010-02-16 22:04:33 +0000408 llvm::Value *CXXVTTValue;
Anders Carlssonf6c56e22009-11-25 03:15:49 +0000409
Anders Carlssone8b55782009-06-03 18:54:26 +0000410 /// CXXLiveTemporaryInfo - Holds information about a live C++ temporary.
411 struct CXXLiveTemporaryInfo {
412 /// Temporary - The live temporary.
413 const CXXTemporary *Temporary;
Mike Stump1eb44332009-09-09 15:08:12 +0000414
Anders Carlssone8b55782009-06-03 18:54:26 +0000415 /// ThisPtr - The pointer to the temporary.
416 llvm::Value *ThisPtr;
Mike Stump1eb44332009-09-09 15:08:12 +0000417
Anders Carlssone8b55782009-06-03 18:54:26 +0000418 /// DtorBlock - The destructor block.
419 llvm::BasicBlock *DtorBlock;
Mike Stump1eb44332009-09-09 15:08:12 +0000420
Mike Stumpf71d2322009-11-30 20:08:49 +0000421 /// CondPtr - If this is a conditional temporary, this is the pointer to the
422 /// condition variable that states whether the destructor should be called
423 /// or not.
Anders Carlssone8b55782009-06-03 18:54:26 +0000424 llvm::Value *CondPtr;
Mike Stump1eb44332009-09-09 15:08:12 +0000425
Anders Carlssone8b55782009-06-03 18:54:26 +0000426 CXXLiveTemporaryInfo(const CXXTemporary *temporary,
Anders Carlssonf4b8fea2009-06-03 19:05:16 +0000427 llvm::Value *thisptr, llvm::BasicBlock *dtorblock,
428 llvm::Value *condptr)
Mike Stump1eb44332009-09-09 15:08:12 +0000429 : Temporary(temporary), ThisPtr(thisptr), DtorBlock(dtorblock),
Anders Carlssone8b55782009-06-03 18:54:26 +0000430 CondPtr(condptr) { }
431 };
Mike Stump1eb44332009-09-09 15:08:12 +0000432
Anders Carlssone8b55782009-06-03 18:54:26 +0000433 llvm::SmallVector<CXXLiveTemporaryInfo, 4> LiveTemporaries;
Anders Carlsson1d847502009-06-04 02:22:12 +0000434
Anders Carlssona36bf8f2009-11-20 17:27:56 +0000435 /// ConditionalBranchLevel - Contains the nesting level of the current
436 /// conditional branch. This is used so that we know if a temporary should be
437 /// destroyed conditionally.
438 unsigned ConditionalBranchLevel;
Mike Stump1eb44332009-09-09 15:08:12 +0000439
Anders Carlsson7dfa4072009-09-12 02:14:24 +0000440
441 /// ByrefValueInfoMap - For each __block variable, contains a pair of the LLVM
442 /// type as well as the field number that contains the actual data.
443 llvm::DenseMap<const ValueDecl *, std::pair<const llvm::Type *,
444 unsigned> > ByRefValueInfo;
445
446 /// getByrefValueFieldNumber - Given a declaration, returns the LLVM field
447 /// number that holds the value.
448 unsigned getByRefValueLLVMField(const ValueDecl *VD) const;
Mike Stump182f3832009-12-10 00:02:42 +0000449
450 llvm::BasicBlock *TerminateHandler;
Mike Stump15037ca2009-12-15 00:35:12 +0000451 llvm::BasicBlock *TrapBB;
Eli Friedman94067052009-12-10 02:21:21 +0000452
453 int UniqueAggrDestructorCount;
Reid Spencer5f016e22007-07-11 17:01:13 +0000454public:
455 CodeGenFunction(CodeGenModule &cgm);
Mike Stump0dd9e882009-02-08 23:14:22 +0000456
Reid Spencer5f016e22007-07-11 17:01:13 +0000457 ASTContext &getContext() const;
Anders Carlssone896d982009-02-13 08:11:52 +0000458 CGDebugInfo *getDebugInfo() { return DebugInfo; }
Reid Spencer5f016e22007-07-11 17:01:13 +0000459
Daniel Dunbar9834ffb2009-02-23 17:26:39 +0000460 llvm::BasicBlock *getInvokeDest() { return InvokeDest; }
461 void setInvokeDest(llvm::BasicBlock *B) { InvokeDest = B; }
462
Owen Andersona1cf15f2009-07-14 23:10:40 +0000463 llvm::LLVMContext &getLLVMContext() { return VMContext; }
Owen Anderson69243822009-07-13 04:10:07 +0000464
Daniel Dunbar9834ffb2009-02-23 17:26:39 +0000465 //===--------------------------------------------------------------------===//
466 // Objective-C
467 //===--------------------------------------------------------------------===//
468
Chris Lattner391d77a2008-03-30 23:03:07 +0000469 void GenerateObjCMethod(const ObjCMethodDecl *OMD);
Daniel Dunbaraf05bb92008-08-26 08:29:31 +0000470
Mike Stump0dd9e882009-02-08 23:14:22 +0000471 void StartObjCMethod(const ObjCMethodDecl *MD,
Fariborz Jahanian679a5022009-01-10 21:06:09 +0000472 const ObjCContainerDecl *CD);
Daniel Dunbaraf05bb92008-08-26 08:29:31 +0000473
Mike Stump0dd9e882009-02-08 23:14:22 +0000474 /// GenerateObjCGetter - Synthesize an Objective-C property getter function.
Fariborz Jahanianfef30b52008-12-09 20:23:04 +0000475 void GenerateObjCGetter(ObjCImplementationDecl *IMP,
476 const ObjCPropertyImplDecl *PID);
Daniel Dunbaraf05bb92008-08-26 08:29:31 +0000477
Mike Stump0dd9e882009-02-08 23:14:22 +0000478 /// GenerateObjCSetter - Synthesize an Objective-C property setter function
479 /// for the given property.
Fariborz Jahanianfef30b52008-12-09 20:23:04 +0000480 void GenerateObjCSetter(ObjCImplementationDecl *IMP,
481 const ObjCPropertyImplDecl *PID);
Daniel Dunbaraf05bb92008-08-26 08:29:31 +0000482
Mike Stump4e7a1f72009-02-21 20:00:35 +0000483 //===--------------------------------------------------------------------===//
484 // Block Bits
485 //===--------------------------------------------------------------------===//
486
Mike Stump8a2b4b12009-02-25 23:33:13 +0000487 llvm::Value *BuildBlockLiteralTmp(const BlockExpr *);
Blaine Garst2a7eb282010-02-23 21:51:17 +0000488 llvm::Constant *BuildDescriptorBlockDecl(const BlockExpr *,
489 bool BlockHasCopyDispose,
Ken Dyck199c3d62010-01-11 17:06:35 +0000490 CharUnits Size,
Mike Stump08920992009-03-07 02:35:30 +0000491 const llvm::StructType *,
492 std::vector<HelperInfo> *);
Mike Stump4e7a1f72009-02-21 20:00:35 +0000493
Chris Lattner161d36d2009-02-28 19:01:03 +0000494 llvm::Function *GenerateBlockFunction(const BlockExpr *BExpr,
Mike Stump4e7a1f72009-02-21 20:00:35 +0000495 const BlockInfo& Info,
Mike Stump6cc88f72009-03-20 21:53:12 +0000496 const Decl *OuterFuncDecl,
Mike Stump7f28a9c2009-03-13 23:34:28 +0000497 llvm::DenseMap<const Decl*, llvm::Value*> ldm,
Ken Dyck30a8a272010-01-26 19:13:33 +0000498 CharUnits &Size, CharUnits &Align,
Mike Stump00470a12009-03-05 08:32:30 +0000499 llvm::SmallVector<const Expr *, 8> &subBlockDeclRefDecls,
500 bool &subBlockHasCopyDispose);
Mike Stump4e7a1f72009-02-21 20:00:35 +0000501
Mike Stump6cc88f72009-03-20 21:53:12 +0000502 void BlockForwardSelf();
Mike Stump4e7a1f72009-02-21 20:00:35 +0000503 llvm::Value *LoadBlockStruct();
504
Ken Dyck199c3d62010-01-11 17:06:35 +0000505 CharUnits AllocateBlockDecl(const BlockDeclRefExpr *E);
Mike Stumpa99038c2009-02-28 09:07:16 +0000506 llvm::Value *GetAddrOfBlockDecl(const BlockDeclRefExpr *E);
Anders Carlsson9ad55132009-09-09 02:51:03 +0000507 const llvm::Type *BuildByRefType(const ValueDecl *D);
Mike Stumpdab514f2009-03-04 03:23:46 +0000508
Anders Carlsson0ff8baf2009-09-11 00:07:24 +0000509 void GenerateCode(GlobalDecl GD, llvm::Function *Fn);
510 void StartFunction(GlobalDecl GD, QualType RetTy,
Daniel Dunbar7c086512008-09-09 23:14:03 +0000511 llvm::Function *Fn,
Daniel Dunbar2284ac92008-10-18 18:22:23 +0000512 const FunctionArgList &Args,
513 SourceLocation StartLoc);
Daniel Dunbara448fb22008-11-11 23:11:34 +0000514
John McCall9fc6a772010-02-19 09:25:03 +0000515 void EmitConstructorBody(FunctionArgList &Args);
516 void EmitDestructorBody(FunctionArgList &Args);
517 void EmitFunctionBody(FunctionArgList &Args);
John McCalla355e072010-02-18 03:17:58 +0000518
Mike Stump0dd9e882009-02-08 23:14:22 +0000519 /// EmitReturnBlock - Emit the unified return block, trying to avoid its
520 /// emission when possible.
Daniel Dunbar1c1d6072009-01-26 23:27:52 +0000521 void EmitReturnBlock();
522
Mike Stump0dd9e882009-02-08 23:14:22 +0000523 /// FinishFunction - Complete IR generation of the current function. It is
524 /// legal to call this function even if there is no current insertion point.
Daniel Dunbaraf05bb92008-08-26 08:29:31 +0000525 void FinishFunction(SourceLocation EndLoc=SourceLocation());
Daniel Dunbar17b708d2008-09-09 23:27:19 +0000526
Anders Carlsson519c3282010-03-24 00:39:18 +0000527 /// GenerateThunk - Generate a thunk for the given method.
528 void GenerateThunk(llvm::Function *Fn, GlobalDecl GD, const ThunkInfo &Thunk);
529
Anders Carlssonde1d26b2009-09-14 05:32:02 +0000530 void EmitCtorPrologue(const CXXConstructorDecl *CD, CXXCtorType Type);
Mike Stump1eb44332009-09-09 15:08:12 +0000531
Anders Carlssond103f9f2010-03-28 19:40:00 +0000532 /// InitializeVTablePointer - Initialize the vtable pointer of the given
533 /// subobject.
534 ///
535 /// \param BaseIsMorallyVirtual - Whether the base subobject is a virtual base
536 /// or a direct or indirect base of a virtual base.
537 void InitializeVTablePointer(BaseSubobject Base, bool BaseIsMorallyVirtual,
538 llvm::Constant *VTable,
539 const CXXRecordDecl *VTableClass);
540
541 typedef llvm::SmallPtrSet<const CXXRecordDecl *, 4> VisitedVirtualBasesSetTy;
Anders Carlsson603d6d12010-03-28 21:07:49 +0000542 void InitializeVTablePointers(BaseSubobject Base, bool BaseIsMorallyVirtual,
543 bool BaseIsNonVirtualPrimaryBase,
544 llvm::Constant *VTable,
545 const CXXRecordDecl *VTableClass,
546 VisitedVirtualBasesSetTy& VBases);
Eli Friedman77a259c2009-12-08 06:46:18 +0000547
Anders Carlsson603d6d12010-03-28 21:07:49 +0000548 void InitializeVTablePointers(const CXXRecordDecl *ClassDecl);
Anders Carlssond103f9f2010-03-28 19:40:00 +0000549
550
John McCall9fc6a772010-02-19 09:25:03 +0000551 void SynthesizeCXXCopyConstructor(const FunctionArgList &Args);
552 void SynthesizeCXXCopyAssignment(const FunctionArgList &Args);
Mike Stump1eb44332009-09-09 15:08:12 +0000553
Fariborz Jahanian426cc382009-07-30 17:49:11 +0000554 /// EmitDtorEpilogue - Emit all code that comes at the end of class's
Mike Stumpf71d2322009-11-30 20:08:49 +0000555 /// destructor. This is to call destructors on members and base classes in
556 /// reverse order of their construction.
Anders Carlssonde1d26b2009-09-14 05:32:02 +0000557 void EmitDtorEpilogue(const CXXDestructorDecl *Dtor,
558 CXXDtorType Type);
Mike Stump1eb44332009-09-09 15:08:12 +0000559
Mike Stump0dd9e882009-02-08 23:14:22 +0000560 /// EmitFunctionProlog - Emit the target specific LLVM code to load the
561 /// arguments for the given function. This is also responsible for naming the
562 /// LLVM function arguments.
Daniel Dunbar88b53962009-02-02 22:03:45 +0000563 void EmitFunctionProlog(const CGFunctionInfo &FI,
564 llvm::Function *Fn,
Daniel Dunbar17b708d2008-09-09 23:27:19 +0000565 const FunctionArgList &Args);
566
Mike Stump0dd9e882009-02-08 23:14:22 +0000567 /// EmitFunctionEpilog - Emit the target specific LLVM code to return the
568 /// given temporary.
Daniel Dunbar88b53962009-02-02 22:03:45 +0000569 void EmitFunctionEpilog(const CGFunctionInfo &FI, llvm::Value *ReturnValue);
Daniel Dunbar17b708d2008-09-09 23:27:19 +0000570
Mike Stumpcce3d4f2009-12-07 23:38:24 +0000571 /// EmitStartEHSpec - Emit the start of the exception spec.
572 void EmitStartEHSpec(const Decl *D);
573
574 /// EmitEndEHSpec - Emit the end of the exception spec.
575 void EmitEndEHSpec(const Decl *D);
576
Mike Stump182f3832009-12-10 00:02:42 +0000577 /// getTerminateHandler - Return a handler that just calls terminate.
Mike Stump9b39c512009-12-09 22:59:31 +0000578 llvm::BasicBlock *getTerminateHandler();
579
Daniel Dunbar8b1a3432009-02-03 23:03:55 +0000580 const llvm::Type *ConvertTypeForMem(QualType T);
Reid Spencer5f016e22007-07-11 17:01:13 +0000581 const llvm::Type *ConvertType(QualType T);
John McCallbff225e2010-02-16 04:15:37 +0000582 const llvm::Type *ConvertType(const TypeDecl *T) {
583 return ConvertType(getContext().getTypeDeclType(T));
584 }
Chris Lattnerc8aa5f12008-04-04 04:07:35 +0000585
Mike Stump0dd9e882009-02-08 23:14:22 +0000586 /// LoadObjCSelf - Load the value of self. This function is only valid while
587 /// generating code for an Objective-C method.
Chris Lattnerc8aa5f12008-04-04 04:07:35 +0000588 llvm::Value *LoadObjCSelf();
Mike Stump0dd9e882009-02-08 23:14:22 +0000589
590 /// TypeOfSelfObject - Return type of object that this self represents.
Fariborz Jahanian45012a72009-02-03 00:09:52 +0000591 QualType TypeOfSelfObject();
Chris Lattner41110242008-06-17 18:05:57 +0000592
Reid Spencer5f016e22007-07-11 17:01:13 +0000593 /// hasAggregateLLVMType - Return true if the specified AST type will map into
594 /// an aggregate LLVM type or is void.
595 static bool hasAggregateLLVMType(QualType T);
Daniel Dunbar55e87422008-11-11 02:29:29 +0000596
597 /// createBasicBlock - Create an LLVM basic block.
Mike Stump0dd9e882009-02-08 23:14:22 +0000598 llvm::BasicBlock *createBasicBlock(const char *Name="",
Daniel Dunbar55e87422008-11-11 02:29:29 +0000599 llvm::Function *Parent=0,
600 llvm::BasicBlock *InsertBefore=0) {
Daniel Dunbar29ea6722008-11-12 00:01:12 +0000601#ifdef NDEBUG
Owen Anderson0032b272009-08-13 21:57:51 +0000602 return llvm::BasicBlock::Create(VMContext, "", Parent, InsertBefore);
Daniel Dunbar29ea6722008-11-12 00:01:12 +0000603#else
Owen Anderson0032b272009-08-13 21:57:51 +0000604 return llvm::BasicBlock::Create(VMContext, Name, Parent, InsertBefore);
Daniel Dunbar29ea6722008-11-12 00:01:12 +0000605#endif
Daniel Dunbar55e87422008-11-11 02:29:29 +0000606 }
Mike Stump0dd9e882009-02-08 23:14:22 +0000607
Reid Spencer5f016e22007-07-11 17:01:13 +0000608 /// getBasicBlockForLabel - Return the LLVM basicblock that the specified
609 /// label maps to.
610 llvm::BasicBlock *getBasicBlockForLabel(const LabelStmt *S);
Mike Stump0dd9e882009-02-08 23:14:22 +0000611
Mike Stumpf71d2322009-11-30 20:08:49 +0000612 /// SimplifyForwardingBlocks - If the given basic block is only a branch to
613 /// another basic block, simplify it. This assumes that no other code could
614 /// potentially reference the basic block.
Daniel Dunbaraa5bd872009-04-01 04:37:47 +0000615 void SimplifyForwardingBlocks(llvm::BasicBlock *BB);
616
Mike Stump0dd9e882009-02-08 23:14:22 +0000617 /// EmitBlock - Emit the given block \arg BB and set it as the insert point,
618 /// adding a fall-through branch from the current insert block if
619 /// necessary. It is legal to call this function even if there is no current
620 /// insertion point.
Daniel Dunbara0c21a82008-11-13 01:24:05 +0000621 ///
Mike Stump0dd9e882009-02-08 23:14:22 +0000622 /// IsFinished - If true, indicates that the caller has finished emitting
623 /// branches to the given block and does not expect to emit code into it. This
624 /// means the block can be ignored if it is unreachable.
Daniel Dunbara0c21a82008-11-13 01:24:05 +0000625 void EmitBlock(llvm::BasicBlock *BB, bool IsFinished=false);
Daniel Dunbar824e3bd2008-11-11 04:34:23 +0000626
Mike Stump0dd9e882009-02-08 23:14:22 +0000627 /// EmitBranch - Emit a branch to the specified basic block from the current
628 /// insert block, taking care to avoid creation of branches from dummy
629 /// blocks. It is legal to call this function even if there is no current
630 /// insertion point.
Daniel Dunbar5e08ad32008-11-11 22:06:59 +0000631 ///
Mike Stump0dd9e882009-02-08 23:14:22 +0000632 /// This function clears the current insertion point. The caller should follow
633 /// calls to this function with calls to Emit*Block prior to generation new
634 /// code.
Daniel Dunbard57a8712008-11-11 09:41:28 +0000635 void EmitBranch(llvm::BasicBlock *Block);
636
Mike Stump0dd9e882009-02-08 23:14:22 +0000637 /// HaveInsertPoint - True if an insertion point is defined. If not, this
638 /// indicates that the current code being emitted is unreachable.
639 bool HaveInsertPoint() const {
Daniel Dunbara448fb22008-11-11 23:11:34 +0000640 return Builder.GetInsertBlock() != 0;
641 }
642
Mike Stump0dd9e882009-02-08 23:14:22 +0000643 /// EnsureInsertPoint - Ensure that an insertion point is defined so that
644 /// emitted IR has a place to go. Note that by definition, if this function
645 /// creates a block then that block is unreachable; callers may do better to
646 /// detect when no insertion point is defined and simply skip IR generation.
Daniel Dunbara448fb22008-11-11 23:11:34 +0000647 void EnsureInsertPoint() {
648 if (!HaveInsertPoint())
649 EmitBlock(createBasicBlock());
650 }
Mike Stump0dd9e882009-02-08 23:14:22 +0000651
Daniel Dunbar488e9932008-08-16 00:56:44 +0000652 /// ErrorUnsupported - Print out an error that codegen doesn't support the
Chris Lattnerdc5e8262007-12-02 01:43:38 +0000653 /// specified stmt yet.
Daniel Dunbar90df4b62008-09-04 03:43:08 +0000654 void ErrorUnsupported(const Stmt *S, const char *Type,
655 bool OmitOnError=false);
Reid Spencer5f016e22007-07-11 17:01:13 +0000656
657 //===--------------------------------------------------------------------===//
658 // Helpers
659 //===--------------------------------------------------------------------===//
Mike Stump0dd9e882009-02-08 23:14:22 +0000660
John McCall0953e762009-09-24 19:53:00 +0000661 Qualifiers MakeQualifiers(QualType T) {
Mike Stumpdf317bf2009-11-03 23:25:48 +0000662 Qualifiers Quals = getContext().getCanonicalType(T).getQualifiers();
John McCall0953e762009-09-24 19:53:00 +0000663 Quals.setObjCGCAttr(getContext().getObjCGCAttrKind(T));
664 return Quals;
665 }
666
Reid Spencer5f016e22007-07-11 17:01:13 +0000667 /// CreateTempAlloca - This creates a alloca and inserts it into the entry
Daniel Dunbar195337d2010-02-09 02:48:28 +0000668 /// block. The caller is responsible for setting an appropriate alignment on
669 /// the alloca.
Reid Spencer5f016e22007-07-11 17:01:13 +0000670 llvm::AllocaInst *CreateTempAlloca(const llvm::Type *Ty,
Daniel Dunbar259e9cc2009-10-19 01:21:05 +0000671 const llvm::Twine &Name = "tmp");
Mike Stump0dd9e882009-02-08 23:14:22 +0000672
Daniel Dunbar9bd4da22010-02-16 19:44:13 +0000673 /// CreateIRTemp - Create a temporary IR object of the given type, with
674 /// appropriate alignment. This routine should only be used when an temporary
675 /// value needs to be stored into an alloca (for example, to avoid explicit
676 /// PHI construction), but the type is the IR type, not the type appropriate
677 /// for storing in memory.
678 llvm::Value *CreateIRTemp(QualType T, const llvm::Twine &Name = "tmp");
679
Daniel Dunbar195337d2010-02-09 02:48:28 +0000680 /// CreateMemTemp - Create a temporary memory object of the given type, with
681 /// appropriate alignment.
682 llvm::Value *CreateMemTemp(QualType T, const llvm::Twine &Name = "tmp");
683
Reid Spencer5f016e22007-07-11 17:01:13 +0000684 /// EvaluateExprAsBool - Perform the usual unary conversions on the specified
685 /// expression and compare the result against zero, returning an Int1Ty value.
686 llvm::Value *EvaluateExprAsBool(const Expr *E);
687
Chris Lattner9b655512007-08-31 22:49:20 +0000688 /// EmitAnyExpr - Emit code to compute the specified expression which can have
689 /// any type. The result is returned as an RValue struct. If this is an
690 /// aggregate expression, the aggloc/agglocvolatile arguments indicate where
691 /// the result should be returned.
Mike Stump49d1cd52009-05-26 22:03:21 +0000692 ///
693 /// \param IgnoreResult - True if the resulting value isn't used.
Mike Stump0dd9e882009-02-08 23:14:22 +0000694 RValue EmitAnyExpr(const Expr *E, llvm::Value *AggLoc = 0,
Anders Carlsson14c5cbf2009-08-16 07:36:22 +0000695 bool IsAggLocVolatile = false, bool IgnoreResult = false,
696 bool IsInitializer = false);
Devang Pateld9363c32007-09-28 21:49:18 +0000697
Mike Stump0dd9e882009-02-08 23:14:22 +0000698 // EmitVAListRef - Emit a "reference" to a va_list; this is either the address
699 // or the value of the expression, depending on how va_list is defined.
Eli Friedman4fd0aa52009-01-20 17:46:04 +0000700 llvm::Value *EmitVAListRef(const Expr *E);
701
Mike Stump0dd9e882009-02-08 23:14:22 +0000702 /// EmitAnyExprToTemp - Similary to EmitAnyExpr(), however, the result will
703 /// always be accessible even if no aggregate location is provided.
Anders Carlsson14c5cbf2009-08-16 07:36:22 +0000704 RValue EmitAnyExprToTemp(const Expr *E, bool IsAggLocVolatile = false,
705 bool IsInitializer = false);
Daniel Dunbar46f45b92008-09-09 01:06:48 +0000706
Mike Stump27fe2e62009-05-23 22:29:41 +0000707 /// EmitAggregateCopy - Emit an aggrate copy.
708 ///
709 /// \param isVolatile - True iff either the source or the destination is
710 /// volatile.
Daniel Dunbar7482d122008-09-09 20:49:46 +0000711 void EmitAggregateCopy(llvm::Value *DestPtr, llvm::Value *SrcPtr,
Mike Stump27fe2e62009-05-23 22:29:41 +0000712 QualType EltTy, bool isVolatile=false);
Daniel Dunbar7482d122008-09-09 20:49:46 +0000713
714 void EmitAggregateClear(llvm::Value *DestPtr, QualType Ty);
715
Devang Patel51b09f22007-10-04 23:45:31 +0000716 /// StartBlock - Start new block named N. If insert block is a dummy block
717 /// then reuse it.
718 void StartBlock(const char *N);
719
Lauro Ramos Venancio81373352008-02-26 21:41:45 +0000720 /// GetAddrOfStaticLocalVar - Return the address of a static local variable.
Steve Naroff248a7532008-04-15 22:42:06 +0000721 llvm::Constant *GetAddrOfStaticLocalVar(const VarDecl *BVD);
Dan Gohman4f8d1232008-05-22 00:50:06 +0000722
Anders Carlssondde0a942008-09-11 09:15:33 +0000723 /// GetAddrOfLocalVar - Return the address of a local variable.
724 llvm::Value *GetAddrOfLocalVar(const VarDecl *VD);
Mike Stump0dd9e882009-02-08 23:14:22 +0000725
Dan Gohman4f8d1232008-05-22 00:50:06 +0000726 /// getAccessedFieldNo - Given an encoded value and a result number, return
727 /// the input field number being accessed.
728 static unsigned getAccessedFieldNo(unsigned Idx, const llvm::Constant *Elts);
729
Chris Lattnerd9becd12009-10-28 23:59:40 +0000730 llvm::BlockAddress *GetAddrOfLabel(const LabelStmt *L);
Chris Lattner3d00fdc2009-10-13 06:55:33 +0000731 llvm::BasicBlock *GetIndirectGotoBlock();
Daniel Dunbar0ffb1252008-08-04 16:51:22 +0000732
Mike Stump0dd9e882009-02-08 23:14:22 +0000733 /// EmitMemSetToZero - Generate code to memset a value of the given type to 0.
Anders Carlsson3d8400d2008-08-30 19:51:14 +0000734 void EmitMemSetToZero(llvm::Value *DestPtr, QualType Ty);
Anders Carlssonddf7cac2008-11-04 05:30:00 +0000735
736 // EmitVAArg - Generate code to get an argument from the passed in pointer
737 // and update it accordingly. The return value is a pointer to the argument.
738 // FIXME: We should be able to get rid of this method and use the va_arg
Mike Stump0dd9e882009-02-08 23:14:22 +0000739 // instruction in LLVM instead once it works well enough.
Anders Carlssonddf7cac2008-11-04 05:30:00 +0000740 llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty);
Anders Carlssonf666b772008-12-20 20:27:15 +0000741
Mike Stumpf71d2322009-11-30 20:08:49 +0000742 /// EmitVLASize - Generate code for any VLA size expressions that might occur
743 /// in a variably modified type. If Ty is a VLA, will return the value that
744 /// corresponds to the size in bytes of the VLA type. Will return 0 otherwise.
Daniel Dunbard286f052009-07-19 06:58:07 +0000745 ///
746 /// This function can be called with a null (unreachable) insert point.
Anders Carlsson60d35412008-12-20 20:46:34 +0000747 llvm::Value *EmitVLASize(QualType Ty);
Mike Stump0dd9e882009-02-08 23:14:22 +0000748
Anders Carlssondcc90d82008-12-12 07:19:02 +0000749 // GetVLASize - Returns an LLVM value that corresponds to the size in bytes
750 // of a variable length array type.
751 llvm::Value *GetVLASize(const VariableArrayType *);
752
Anders Carlsson5f4307b2009-04-14 16:58:56 +0000753 /// LoadCXXThis - Load the value of 'this'. This function is only valid while
754 /// generating code for an C++ member function.
John McCall25049412010-02-16 22:04:33 +0000755 llvm::Value *LoadCXXThis() {
756 assert(CXXThisValue && "no 'this' value for this function");
757 return CXXThisValue;
758 }
Mike Stump1eb44332009-09-09 15:08:12 +0000759
Anders Carlssonc997d422010-01-02 01:01:18 +0000760 /// LoadCXXVTT - Load the VTT parameter to base constructors/destructors have
761 /// virtual bases.
John McCall25049412010-02-16 22:04:33 +0000762 llvm::Value *LoadCXXVTT() {
763 assert(CXXVTTValue && "no VTT value for this function");
764 return CXXVTTValue;
765 }
John McCallbff225e2010-02-16 04:15:37 +0000766
767 /// GetAddressOfBaseOfCompleteClass - Convert the given pointer to a
768 /// complete class down to one of its virtual bases.
769 llvm::Value *GetAddressOfBaseOfCompleteClass(llvm::Value *Value,
770 bool IsVirtual,
771 const CXXRecordDecl *Derived,
772 const CXXRecordDecl *Base);
Anders Carlssonc997d422010-01-02 01:01:18 +0000773
Mike Stumpf71d2322009-11-30 20:08:49 +0000774 /// GetAddressOfBaseClass - This function will add the necessary delta to the
775 /// load of 'this' and returns address of the base class.
Anders Carlssona3697c92009-11-23 17:57:54 +0000776 llvm::Value *GetAddressOfBaseClass(llvm::Value *Value,
777 const CXXRecordDecl *ClassDecl,
778 const CXXRecordDecl *BaseClassDecl,
779 bool NullCheckValue);
Anders Carlsson84080ec2009-09-29 03:13:20 +0000780
Anders Carlssona3697c92009-11-23 17:57:54 +0000781 llvm::Value *GetAddressOfDerivedClass(llvm::Value *Value,
782 const CXXRecordDecl *ClassDecl,
783 const CXXRecordDecl *DerivedClassDecl,
784 bool NullCheckValue);
785
Anders Carlssonbb7e17b2010-01-31 01:36:53 +0000786 llvm::Value *GetVirtualBaseClassOffset(llvm::Value *This,
787 const CXXRecordDecl *ClassDecl,
788 const CXXRecordDecl *BaseClassDecl);
Anders Carlsson2f1986b2009-10-06 22:43:30 +0000789
Mike Stump1eb44332009-09-09 15:08:12 +0000790 void EmitClassAggrMemberwiseCopy(llvm::Value *DestValue,
Fariborz Jahanianeb0b6d52009-08-21 18:30:26 +0000791 llvm::Value *SrcValue,
792 const ArrayType *Array,
793 const CXXRecordDecl *BaseClassDecl,
794 QualType Ty);
795
Mike Stump1eb44332009-09-09 15:08:12 +0000796 void EmitClassAggrCopyAssignment(llvm::Value *DestValue,
Fariborz Jahanianc28bbc22009-08-21 22:34:55 +0000797 llvm::Value *SrcValue,
798 const ArrayType *Array,
799 const CXXRecordDecl *BaseClassDecl,
800 QualType Ty);
801
Fariborz Jahanianca283612009-08-07 23:51:33 +0000802 void EmitClassMemberwiseCopy(llvm::Value *DestValue, llvm::Value *SrcValue,
Mike Stump1eb44332009-09-09 15:08:12 +0000803 const CXXRecordDecl *ClassDecl,
Fariborz Jahanian942f4f32009-08-08 23:32:22 +0000804 const CXXRecordDecl *BaseClassDecl,
805 QualType Ty);
Mike Stump1eb44332009-09-09 15:08:12 +0000806
Fariborz Jahanian0270b8a2009-08-12 23:34:46 +0000807 void EmitClassCopyAssignment(llvm::Value *DestValue, llvm::Value *SrcValue,
Mike Stump1eb44332009-09-09 15:08:12 +0000808 const CXXRecordDecl *ClassDecl,
Fariborz Jahanian0270b8a2009-08-12 23:34:46 +0000809 const CXXRecordDecl *BaseClassDecl,
810 QualType Ty);
Mike Stump1eb44332009-09-09 15:08:12 +0000811
John McCallc0bf4622010-02-23 00:48:20 +0000812 void EmitDelegateCXXConstructorCall(const CXXConstructorDecl *Ctor,
813 CXXCtorType CtorType,
814 const FunctionArgList &Args);
Mike Stump1eb44332009-09-09 15:08:12 +0000815 void EmitCXXConstructorCall(const CXXConstructorDecl *D, CXXCtorType Type,
Anders Carlssonb14095a2009-04-17 00:06:03 +0000816 llvm::Value *This,
817 CallExpr::const_arg_iterator ArgBeg,
818 CallExpr::const_arg_iterator ArgEnd);
Mike Stump1eb44332009-09-09 15:08:12 +0000819
Fariborz Jahanian288dcaf2009-08-19 20:55:16 +0000820 void EmitCXXAggrConstructorCall(const CXXConstructorDecl *D,
Anders Carlsson569c1f42009-09-23 02:45:36 +0000821 const ConstantArrayType *ArrayTy,
Anders Carlsson5d4d9462009-11-24 18:43:52 +0000822 llvm::Value *ArrayPtr,
823 CallExpr::const_arg_iterator ArgBeg,
824 CallExpr::const_arg_iterator ArgEnd);
825
Anders Carlsson569c1f42009-09-23 02:45:36 +0000826 void EmitCXXAggrConstructorCall(const CXXConstructorDecl *D,
827 llvm::Value *NumElements,
Anders Carlsson5d4d9462009-11-24 18:43:52 +0000828 llvm::Value *ArrayPtr,
829 CallExpr::const_arg_iterator ArgBeg,
830 CallExpr::const_arg_iterator ArgEnd);
Anders Carlssonb14095a2009-04-17 00:06:03 +0000831
Fariborz Jahanianf800f6c2009-08-20 20:54:15 +0000832 void EmitCXXAggrDestructorCall(const CXXDestructorDecl *D,
833 const ArrayType *Array,
834 llvm::Value *This);
Mike Stump1eb44332009-09-09 15:08:12 +0000835
Fariborz Jahanian72c21532009-11-13 19:27:47 +0000836 void EmitCXXAggrDestructorCall(const CXXDestructorDecl *D,
837 llvm::Value *NumElements,
838 llvm::Value *This);
839
Chris Lattnerdd36d322010-01-09 21:40:03 +0000840 llvm::Constant *GenerateCXXAggrDestructorHelper(const CXXDestructorDecl *D,
Fariborz Jahanian88f42802009-11-10 19:24:06 +0000841 const ArrayType *Array,
842 llvm::Value *This);
843
Anders Carlsson7267c162009-05-29 21:03:38 +0000844 void EmitCXXDestructorCall(const CXXDestructorDecl *D, CXXDtorType Type,
845 llvm::Value *This);
Mike Stump1eb44332009-09-09 15:08:12 +0000846
Anders Carlsson543ac0c2009-05-31 00:34:10 +0000847 void PushCXXTemporary(const CXXTemporary *Temporary, llvm::Value *Ptr);
Anders Carlssonf4b8fea2009-06-03 19:05:16 +0000848 void PopCXXTemporary();
Mike Stump1eb44332009-09-09 15:08:12 +0000849
Anders Carlssona00703d2009-05-31 01:40:14 +0000850 llvm::Value *EmitCXXNewExpr(const CXXNewExpr *E);
Anders Carlsson60e282c2009-08-16 21:13:42 +0000851 void EmitCXXDeleteExpr(const CXXDeleteExpr *E);
Mike Stump1eb44332009-09-09 15:08:12 +0000852
Eli Friedman4bf81522009-11-18 00:57:03 +0000853 void EmitDeleteCall(const FunctionDecl *DeleteFD, llvm::Value *Ptr,
854 QualType DeleteTy);
855
Mike Stumpc2e84ae2009-11-15 08:09:41 +0000856 llvm::Value* EmitCXXTypeidExpr(const CXXTypeidExpr *E);
Mike Stumpc849c052009-11-16 06:50:58 +0000857 llvm::Value *EmitDynamicCast(llvm::Value *V, const CXXDynamicCastExpr *DCE);
Mike Stumpc2e84ae2009-11-15 08:09:41 +0000858
Mike Stumpb14e62d2009-12-16 02:57:00 +0000859 void EmitCheck(llvm::Value *, unsigned Size);
860
Chris Lattnerdd36d322010-01-09 21:40:03 +0000861 llvm::Value *EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV,
862 bool isInc, bool isPre);
863 ComplexPairTy EmitComplexPrePostIncDec(const UnaryOperator *E, LValue LV,
864 bool isInc, bool isPre);
Reid Spencer5f016e22007-07-11 17:01:13 +0000865 //===--------------------------------------------------------------------===//
Reid Spencer5f016e22007-07-11 17:01:13 +0000866 // Declaration Emission
867 //===--------------------------------------------------------------------===//
Mike Stump0dd9e882009-02-08 23:14:22 +0000868
Daniel Dunbard286f052009-07-19 06:58:07 +0000869 /// EmitDecl - Emit a declaration.
870 ///
871 /// This function can be called with a null (unreachable) insert point.
Reid Spencer5f016e22007-07-11 17:01:13 +0000872 void EmitDecl(const Decl &D);
Daniel Dunbard286f052009-07-19 06:58:07 +0000873
Mike Stump1eb44332009-09-09 15:08:12 +0000874 /// EmitBlockVarDecl - Emit a block variable declaration.
Daniel Dunbard286f052009-07-19 06:58:07 +0000875 ///
876 /// This function can be called with a null (unreachable) insert point.
Steve Naroff248a7532008-04-15 22:42:06 +0000877 void EmitBlockVarDecl(const VarDecl &D);
Daniel Dunbard286f052009-07-19 06:58:07 +0000878
879 /// EmitLocalBlockVarDecl - Emit a local block variable declaration.
880 ///
881 /// This function can be called with a null (unreachable) insert point.
Steve Naroff248a7532008-04-15 22:42:06 +0000882 void EmitLocalBlockVarDecl(const VarDecl &D);
Daniel Dunbard286f052009-07-19 06:58:07 +0000883
Anders Carlssonf6b89a12010-02-07 02:03:08 +0000884 void EmitStaticBlockVarDecl(const VarDecl &D,
885 llvm::GlobalValue::LinkageTypes Linkage);
Daniel Dunbarb7ec2462008-08-16 03:19:19 +0000886
887 /// EmitParmDecl - Emit a ParmVarDecl or an ImplicitParamDecl.
888 void EmitParmDecl(const VarDecl &D, llvm::Value *Arg);
Mike Stump0dd9e882009-02-08 23:14:22 +0000889
Reid Spencer5f016e22007-07-11 17:01:13 +0000890 //===--------------------------------------------------------------------===//
891 // Statement Emission
892 //===--------------------------------------------------------------------===//
893
Mike Stump0dd9e882009-02-08 23:14:22 +0000894 /// EmitStopPoint - Emit a debug stoppoint if we are emitting debug info.
Daniel Dunbar09124252008-11-12 08:21:33 +0000895 void EmitStopPoint(const Stmt *S);
896
Mike Stump0dd9e882009-02-08 23:14:22 +0000897 /// EmitStmt - Emit the code for the statement \arg S. It is legal to call
898 /// this function even if there is no current insertion point.
899 ///
900 /// This function may clear the current insertion point; callers should use
901 /// EnsureInsertPoint if they wish to subsequently generate code without first
902 /// calling EmitBlock, EmitBranch, or EmitStmt.
Reid Spencer5f016e22007-07-11 17:01:13 +0000903 void EmitStmt(const Stmt *S);
Daniel Dunbara448fb22008-11-11 23:11:34 +0000904
Daniel Dunbar09124252008-11-12 08:21:33 +0000905 /// EmitSimpleStmt - Try to emit a "simple" statement which does not
Mike Stump0dd9e882009-02-08 23:14:22 +0000906 /// necessarily require an insertion point or debug information; typically
907 /// because the statement amounts to a jump or a container of other
908 /// statements.
Daniel Dunbar09124252008-11-12 08:21:33 +0000909 ///
910 /// \return True if the statement was handled.
911 bool EmitSimpleStmt(const Stmt *S);
912
Chris Lattner9b655512007-08-31 22:49:20 +0000913 RValue EmitCompoundStmt(const CompoundStmt &S, bool GetLast = false,
914 llvm::Value *AggLoc = 0, bool isAggVol = false);
Daniel Dunbara448fb22008-11-11 23:11:34 +0000915
Mike Stump0dd9e882009-02-08 23:14:22 +0000916 /// EmitLabel - Emit the block for the given label. It is legal to call this
917 /// function even if there is no current insertion point.
Chris Lattner91d723d2008-07-26 20:23:23 +0000918 void EmitLabel(const LabelStmt &S); // helper for EmitLabelStmt.
Daniel Dunbara448fb22008-11-11 23:11:34 +0000919
Reid Spencer5f016e22007-07-11 17:01:13 +0000920 void EmitLabelStmt(const LabelStmt &S);
921 void EmitGotoStmt(const GotoStmt &S);
Daniel Dunbar0ffb1252008-08-04 16:51:22 +0000922 void EmitIndirectGotoStmt(const IndirectGotoStmt &S);
Reid Spencer5f016e22007-07-11 17:01:13 +0000923 void EmitIfStmt(const IfStmt &S);
924 void EmitWhileStmt(const WhileStmt &S);
925 void EmitDoStmt(const DoStmt &S);
926 void EmitForStmt(const ForStmt &S);
927 void EmitReturnStmt(const ReturnStmt &S);
928 void EmitDeclStmt(const DeclStmt &S);
Daniel Dunbar09124252008-11-12 08:21:33 +0000929 void EmitBreakStmt(const BreakStmt &S);
930 void EmitContinueStmt(const ContinueStmt &S);
Devang Patel51b09f22007-10-04 23:45:31 +0000931 void EmitSwitchStmt(const SwitchStmt &S);
932 void EmitDefaultStmt(const DefaultStmt &S);
933 void EmitCaseStmt(const CaseStmt &S);
Devang Patelc049e4f2007-10-08 20:57:48 +0000934 void EmitCaseStmtRange(const CaseStmt &S);
Anders Carlssonfb1aeb82008-02-05 16:35:33 +0000935 void EmitAsmStmt(const AsmStmt &S);
Mike Stump0dd9e882009-02-08 23:14:22 +0000936
Anders Carlsson3d8400d2008-08-30 19:51:14 +0000937 void EmitObjCForCollectionStmt(const ObjCForCollectionStmt &S);
Anders Carlsson64d5d6c2008-09-09 10:04:29 +0000938 void EmitObjCAtTryStmt(const ObjCAtTryStmt &S);
939 void EmitObjCAtThrowStmt(const ObjCAtThrowStmt &S);
Chris Lattner10cac6f2008-11-15 21:26:17 +0000940 void EmitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt &S);
Mike Stump0dd9e882009-02-08 23:14:22 +0000941
John McCall9fc6a772010-02-19 09:25:03 +0000942 struct CXXTryStmtInfo {
943 llvm::BasicBlock *SavedLandingPad;
944 llvm::BasicBlock *HandlerBlock;
945 llvm::BasicBlock *FinallyBlock;
946 };
947 CXXTryStmtInfo EnterCXXTryStmt(const CXXTryStmt &S);
948 void ExitCXXTryStmt(const CXXTryStmt &S, CXXTryStmtInfo Info);
949
Anders Carlsson6815e942009-09-27 18:58:34 +0000950 void EmitCXXTryStmt(const CXXTryStmt &S);
951
Reid Spencer5f016e22007-07-11 17:01:13 +0000952 //===--------------------------------------------------------------------===//
953 // LValue Expression Emission
954 //===--------------------------------------------------------------------===//
955
Daniel Dunbar13e81732009-02-05 07:09:07 +0000956 /// GetUndefRValue - Get an appropriate 'undef' rvalue for the given type.
957 RValue GetUndefRValue(QualType Ty);
958
Daniel Dunbarce1d38b2009-01-09 16:50:52 +0000959 /// EmitUnsupportedRValue - Emit a dummy r-value using the type of E
960 /// and issue an ErrorUnsupported style diagnostic (using the
961 /// provided Name).
962 RValue EmitUnsupportedRValue(const Expr *E,
963 const char *Name);
964
Mike Stump0dd9e882009-02-08 23:14:22 +0000965 /// EmitUnsupportedLValue - Emit a dummy l-value using the type of E and issue
966 /// an ErrorUnsupported style diagnostic (using the provided Name).
Daniel Dunbar6ba82a42008-08-25 20:45:57 +0000967 LValue EmitUnsupportedLValue(const Expr *E,
968 const char *Name);
969
Reid Spencer5f016e22007-07-11 17:01:13 +0000970 /// EmitLValue - Emit code to compute a designator that specifies the location
971 /// of the expression.
972 ///
973 /// This can return one of two things: a simple address or a bitfield
974 /// reference. In either case, the LLVM Value* in the LValue structure is
975 /// guaranteed to be an LLVM pointer type.
976 ///
977 /// If this returns a bitfield reference, nothing about the pointee type of
978 /// the LLVM value is known: For example, it may not be a pointer to an
979 /// integer.
980 ///
981 /// If this returns a normal address, and if the lvalue's C type is fixed
982 /// size, this method guarantees that the returned pointer type will point to
983 /// an LLVM type of the same size of the lvalue's type. If the lvalue has a
984 /// variable length type, this is not possible.
985 ///
986 LValue EmitLValue(const Expr *E);
Mike Stump0dd9e882009-02-08 23:14:22 +0000987
Mike Stumpb14e62d2009-12-16 02:57:00 +0000988 /// EmitCheckedLValue - Same as EmitLValue but additionally we generate
989 /// checking code to guard against undefined behavior. This is only
990 /// suitable when we know that the address will be used to access the
991 /// object.
992 LValue EmitCheckedLValue(const Expr *E);
993
Daniel Dunbar9d9cc872009-02-10 00:57:50 +0000994 /// EmitLoadOfScalar - Load a scalar value from an address, taking
995 /// care to appropriately convert from the memory representation to
996 /// the LLVM value representation.
Mike Stump09429b92009-02-17 17:00:02 +0000997 llvm::Value *EmitLoadOfScalar(llvm::Value *Addr, bool Volatile,
Daniel Dunbar9d9cc872009-02-10 00:57:50 +0000998 QualType Ty);
999
1000 /// EmitStoreOfScalar - Store a scalar value to an address, taking
1001 /// care to appropriately convert from the memory representation to
1002 /// the LLVM value representation.
Mike Stump09429b92009-02-17 17:00:02 +00001003 void EmitStoreOfScalar(llvm::Value *Value, llvm::Value *Addr,
Anders Carlssonb4aa4662009-05-19 18:50:41 +00001004 bool Volatile, QualType Ty);
Daniel Dunbar9d9cc872009-02-10 00:57:50 +00001005
Reid Spencer5f016e22007-07-11 17:01:13 +00001006 /// EmitLoadOfLValue - Given an expression that represents a value lvalue,
1007 /// this method emits the address of the lvalue, then loads the result as an
1008 /// rvalue, returning the rvalue.
Reid Spencer5f016e22007-07-11 17:01:13 +00001009 RValue EmitLoadOfLValue(LValue V, QualType LVType);
Nate Begeman213541a2008-04-18 23:10:10 +00001010 RValue EmitLoadOfExtVectorElementLValue(LValue V, QualType LVType);
Lauro Ramos Venancio3b8c22d2008-01-22 20:17:04 +00001011 RValue EmitLoadOfBitfieldLValue(LValue LV, QualType ExprType);
Daniel Dunbar85c59ed2008-08-29 08:11:39 +00001012 RValue EmitLoadOfPropertyRefLValue(LValue LV, QualType ExprType);
Fariborz Jahanian43f44702008-11-22 22:30:21 +00001013 RValue EmitLoadOfKVCRefLValue(LValue LV, QualType ExprType);
Reid Spencer5f016e22007-07-11 17:01:13 +00001014
Mike Stump0dd9e882009-02-08 23:14:22 +00001015
Reid Spencer5f016e22007-07-11 17:01:13 +00001016 /// EmitStoreThroughLValue - Store the specified rvalue into the specified
1017 /// lvalue, where both are guaranteed to the have the same type, and that type
1018 /// is 'Ty'.
1019 void EmitStoreThroughLValue(RValue Src, LValue Dst, QualType Ty);
Nate Begeman213541a2008-04-18 23:10:10 +00001020 void EmitStoreThroughExtVectorComponentLValue(RValue Src, LValue Dst,
1021 QualType Ty);
Daniel Dunbar85c59ed2008-08-29 08:11:39 +00001022 void EmitStoreThroughPropertyRefLValue(RValue Src, LValue Dst, QualType Ty);
Fariborz Jahanian43f44702008-11-22 22:30:21 +00001023 void EmitStoreThroughKVCRefLValue(RValue Src, LValue Dst, QualType Ty);
Daniel Dunbared3849b2008-11-19 09:36:46 +00001024
Mike Stump0dd9e882009-02-08 23:14:22 +00001025 /// EmitStoreThroughLValue - Store Src into Dst with same constraints as
1026 /// EmitStoreThroughLValue.
Daniel Dunbared3849b2008-11-19 09:36:46 +00001027 ///
Mike Stump0dd9e882009-02-08 23:14:22 +00001028 /// \param Result [out] - If non-null, this will be set to a Value* for the
1029 /// bit-field contents after the store, appropriate for use as the result of
1030 /// an assignment to the bit-field.
Daniel Dunbared3849b2008-11-19 09:36:46 +00001031 void EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst, QualType Ty,
1032 llvm::Value **Result=0);
Mike Stump0dd9e882009-02-08 23:14:22 +00001033
Christopher Lamb22c940e2007-12-29 05:02:41 +00001034 // Note: only availabe for agg return types
Daniel Dunbar80e62c22008-09-04 03:20:13 +00001035 LValue EmitBinaryOperatorLValue(const BinaryOperator *E);
Daniel Dunbar5b5c9ef2009-02-11 20:59:32 +00001036 // Note: only available for agg return types
Christopher Lamb22c940e2007-12-29 05:02:41 +00001037 LValue EmitCallExprLValue(const CallExpr *E);
Daniel Dunbar5b5c9ef2009-02-11 20:59:32 +00001038 // Note: only available for agg return types
1039 LValue EmitVAArgExprLValue(const VAArgExpr *E);
Reid Spencer5f016e22007-07-11 17:01:13 +00001040 LValue EmitDeclRefLValue(const DeclRefExpr *E);
1041 LValue EmitStringLiteralLValue(const StringLiteral *E);
Chris Lattnereaf2bb82009-02-24 22:18:39 +00001042 LValue EmitObjCEncodeExprLValue(const ObjCEncodeExpr *E);
Daniel Dunbar662b71e2008-10-17 21:58:32 +00001043 LValue EmitPredefinedFunctionName(unsigned Type);
Chris Lattnerd9f69102008-08-10 01:53:14 +00001044 LValue EmitPredefinedLValue(const PredefinedExpr *E);
Reid Spencer5f016e22007-07-11 17:01:13 +00001045 LValue EmitUnaryOpLValue(const UnaryOperator *E);
1046 LValue EmitArraySubscriptExpr(const ArraySubscriptExpr *E);
Nate Begeman213541a2008-04-18 23:10:10 +00001047 LValue EmitExtVectorElementExpr(const ExtVectorElementExpr *E);
Devang Patelb84a06e2007-10-23 02:10:49 +00001048 LValue EmitMemberExpr(const MemberExpr *E);
Fariborz Jahanian820bca42009-12-09 23:35:29 +00001049 LValue EmitObjCIsaExpr(const ObjCIsaExpr *E);
Eli Friedman06e863f2008-05-13 23:18:27 +00001050 LValue EmitCompoundLiteralLValue(const CompoundLiteralExpr *E);
Anders Carlsson6fcec8b2009-09-15 16:35:24 +00001051 LValue EmitConditionalOperatorLValue(const ConditionalOperator *E);
Chris Lattner75dfeda2009-03-18 18:28:57 +00001052 LValue EmitCastLValue(const CastExpr *E);
Fariborz Jahanian48620ba2009-10-20 23:29:04 +00001053 LValue EmitNullInitializationLValue(const CXXZeroInitValueExpr *E);
Anders Carlsson909fbf72009-11-07 22:00:15 +00001054
Daniel Dunbar2a031922009-04-22 05:08:15 +00001055 llvm::Value *EmitIvarOffset(const ObjCInterfaceDecl *Interface,
Daniel Dunbar29e0bcc2008-09-24 04:00:38 +00001056 const ObjCIvarDecl *Ivar);
Anders Carlsson0ed303c2009-11-17 03:57:07 +00001057 LValue EmitLValueForField(llvm::Value* Base, const FieldDecl* Field,
Anders Carlssone6d2a532010-01-29 05:05:36 +00001058 unsigned CVRQualifiers);
Anders Carlsson06a29702010-01-29 05:24:29 +00001059
1060 /// EmitLValueForFieldInitialization - Like EmitLValueForField, except that
1061 /// if the Field is a reference, this will return the address of the reference
1062 /// and not the address of the value stored in the reference.
1063 LValue EmitLValueForFieldInitialization(llvm::Value* Base,
1064 const FieldDecl* Field,
1065 unsigned CVRQualifiers);
1066
Fariborz Jahanian45012a72009-02-03 00:09:52 +00001067 LValue EmitLValueForIvar(QualType ObjectTy,
1068 llvm::Value* Base, const ObjCIvarDecl *Ivar,
Daniel Dunbar29e0bcc2008-09-24 04:00:38 +00001069 unsigned CVRQualifiers);
1070
Anders Carlsson0ed303c2009-11-17 03:57:07 +00001071 LValue EmitLValueForBitfield(llvm::Value* Base, const FieldDecl* Field,
Fariborz Jahanian598d3f62009-02-03 19:03:09 +00001072 unsigned CVRQualifiers);
Fariborz Jahanianfd64bb62008-12-15 20:35:07 +00001073
Mike Stumpa99038c2009-02-28 09:07:16 +00001074 LValue EmitBlockDeclRefLValue(const BlockDeclRefExpr *E);
1075
Anders Carlssonb58d0172009-05-30 23:23:33 +00001076 LValue EmitCXXConstructLValue(const CXXConstructExpr *E);
Anders Carlssone61c9e82009-05-30 23:30:54 +00001077 LValue EmitCXXBindTemporaryLValue(const CXXBindTemporaryExpr *E);
Anders Carlssonb9ea0b52009-09-14 01:10:45 +00001078 LValue EmitCXXExprWithTemporariesLValue(const CXXExprWithTemporaries *E);
Mike Stumpc2e84ae2009-11-15 08:09:41 +00001079 LValue EmitCXXTypeidLValue(const CXXTypeidExpr *E);
Anders Carlssonb9ea0b52009-09-14 01:10:45 +00001080
Daniel Dunbar0a04d772008-08-23 10:51:21 +00001081 LValue EmitObjCMessageExprLValue(const ObjCMessageExpr *E);
Chris Lattner391d77a2008-03-30 23:03:07 +00001082 LValue EmitObjCIvarRefLValue(const ObjCIvarRefExpr *E);
Daniel Dunbar85c59ed2008-08-29 08:11:39 +00001083 LValue EmitObjCPropertyRefLValue(const ObjCPropertyRefExpr *E);
Fariborz Jahanian09105f52009-08-20 17:02:02 +00001084 LValue EmitObjCKVCRefLValue(const ObjCImplicitSetterGetterRefExpr *E);
Chris Lattner65459942009-04-25 19:35:26 +00001085 LValue EmitObjCSuperExprLValue(const ObjCSuperExpr *E);
1086 LValue EmitStmtExprLValue(const StmtExpr *E);
Fariborz Jahanian8bfd31f2009-10-22 22:57:31 +00001087 LValue EmitPointerToDataMemberBinaryExpr(const BinaryOperator *E);
1088
Reid Spencer5f016e22007-07-11 17:01:13 +00001089 //===--------------------------------------------------------------------===//
Chris Lattner883f6a72007-08-11 00:04:45 +00001090 // Scalar Expression Emission
Reid Spencer5f016e22007-07-11 17:01:13 +00001091 //===--------------------------------------------------------------------===//
1092
Mike Stump0dd9e882009-02-08 23:14:22 +00001093 /// EmitCall - Generate a call of the given function, expecting the given
1094 /// result type, and using the given argument list which specifies both the
1095 /// LLVM arguments and the types they were derived from.
Daniel Dunbarc0ef9f52009-02-20 18:06:48 +00001096 ///
Mike Stumpf71d2322009-11-30 20:08:49 +00001097 /// \param TargetDecl - If given, the decl of the function in a direct call;
1098 /// used to set attributes on the call (noreturn, etc.).
Daniel Dunbar88b53962009-02-02 22:03:45 +00001099 RValue EmitCall(const CGFunctionInfo &FnInfo,
1100 llvm::Value *Callee,
Anders Carlssonf3c47c92009-12-24 19:25:24 +00001101 ReturnValueSlot ReturnValue,
Daniel Dunbarc0ef9f52009-02-20 18:06:48 +00001102 const CallArgList &Args,
1103 const Decl *TargetDecl = 0);
Mike Stump1eb44332009-09-09 15:08:12 +00001104
Anders Carlsson31777a22009-12-24 19:08:58 +00001105 RValue EmitCall(QualType FnType, llvm::Value *Callee,
Anders Carlssond2490a92009-12-24 20:40:36 +00001106 ReturnValueSlot ReturnValue,
Anders Carlsson98647712009-05-27 01:22:39 +00001107 CallExpr::const_arg_iterator ArgBeg,
1108 CallExpr::const_arg_iterator ArgEnd,
1109 const Decl *TargetDecl = 0);
Anders Carlssond2490a92009-12-24 20:40:36 +00001110 RValue EmitCallExpr(const CallExpr *E,
1111 ReturnValueSlot ReturnValue = ReturnValueSlot());
Mike Stump1eb44332009-09-09 15:08:12 +00001112
Anders Carlsson566abee2009-11-13 04:45:41 +00001113 llvm::Value *BuildVirtualCall(const CXXMethodDecl *MD, llvm::Value *This,
Mike Stumpf0070db2009-08-26 20:46:33 +00001114 const llvm::Type *Ty);
Anders Carlsson566abee2009-11-13 04:45:41 +00001115 llvm::Value *BuildVirtualCall(const CXXDestructorDecl *DD, CXXDtorType Type,
1116 llvm::Value *&This, const llvm::Type *Ty);
1117
Anders Carlssonb9de2c52009-05-11 23:37:08 +00001118 RValue EmitCXXMemberCall(const CXXMethodDecl *MD,
1119 llvm::Value *Callee,
Anders Carlssona1736c02009-12-24 21:13:40 +00001120 ReturnValueSlot ReturnValue,
Anders Carlssonb9de2c52009-05-11 23:37:08 +00001121 llvm::Value *This,
Anders Carlssonc997d422010-01-02 01:01:18 +00001122 llvm::Value *VTT,
Anders Carlssonb9de2c52009-05-11 23:37:08 +00001123 CallExpr::const_arg_iterator ArgBeg,
1124 CallExpr::const_arg_iterator ArgEnd);
Anders Carlssona1736c02009-12-24 21:13:40 +00001125 RValue EmitCXXMemberCallExpr(const CXXMemberCallExpr *E,
1126 ReturnValueSlot ReturnValue);
1127 RValue EmitCXXMemberPointerCallExpr(const CXXMemberCallExpr *E,
1128 ReturnValueSlot ReturnValue);
Ted Kremenek55499762008-06-17 02:43:46 +00001129
Anders Carlsson0f294632009-05-27 04:18:27 +00001130 RValue EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E,
Anders Carlssona1736c02009-12-24 21:13:40 +00001131 const CXXMethodDecl *MD,
1132 ReturnValueSlot ReturnValue);
Mike Stump1eb44332009-09-09 15:08:12 +00001133
Anders Carlsson375c31c2009-10-03 19:43:08 +00001134
Mike Stump1eb44332009-09-09 15:08:12 +00001135 RValue EmitBuiltinExpr(const FunctionDecl *FD,
Daniel Dunbaref2abfe2009-02-16 22:43:43 +00001136 unsigned BuiltinID, const CallExpr *E);
Reid Spencer5f016e22007-07-11 17:01:13 +00001137
Anders Carlssona1736c02009-12-24 21:13:40 +00001138 RValue EmitBlockCallExpr(const CallExpr *E, ReturnValueSlot ReturnValue);
Mike Stump09429b92009-02-17 17:00:02 +00001139
Mike Stump0dd9e882009-02-08 23:14:22 +00001140 /// EmitTargetBuiltinExpr - Emit the given builtin call. Returns 0 if the call
1141 /// is unhandled by the current target.
Daniel Dunbarf02e9dd2008-10-10 00:24:54 +00001142 llvm::Value *EmitTargetBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
1143
Chris Lattner2752c012010-03-03 19:03:45 +00001144 llvm::Value *EmitARMBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
Anders Carlsson564f1de2007-12-09 23:17:02 +00001145 llvm::Value *EmitX86BuiltinExpr(unsigned BuiltinID, const CallExpr *E);
1146 llvm::Value *EmitPPCBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
Mike Stump0dd9e882009-02-08 23:14:22 +00001147
Daniel Dunbared7c6182008-08-20 00:28:19 +00001148 llvm::Value *EmitObjCProtocolExpr(const ObjCProtocolExpr *E);
Chris Lattner7f02f722007-08-24 05:35:26 +00001149 llvm::Value *EmitObjCStringLiteral(const ObjCStringLiteral *E);
Chris Lattner8fdf3282008-06-24 17:04:18 +00001150 llvm::Value *EmitObjCSelectorExpr(const ObjCSelectorExpr *E);
Daniel Dunbar8f2926b2008-08-23 03:46:30 +00001151 RValue EmitObjCMessageExpr(const ObjCMessageExpr *E);
Fariborz Jahanian5daf5702008-11-22 18:39:36 +00001152 RValue EmitObjCPropertyGet(const Expr *E);
Fariborz Jahanianf4695572009-03-20 19:18:21 +00001153 RValue EmitObjCSuperPropertyGet(const Expr *Exp, const Selector &S);
Fariborz Jahanian43f44702008-11-22 22:30:21 +00001154 void EmitObjCPropertySet(const Expr *E, RValue Src);
Fariborz Jahanianf4695572009-03-20 19:18:21 +00001155 void EmitObjCSuperPropertySet(const Expr *E, const Selector &S, RValue Src);
Chris Lattner8fdf3282008-06-24 17:04:18 +00001156
1157
Anders Carlsson4029ca72009-05-20 00:24:07 +00001158 /// EmitReferenceBindingToExpr - Emits a reference binding to the passed in
1159 /// expression. Will emit a temporary variable if E is not an LValue.
Anders Carlssona64a8692010-02-03 16:38:03 +00001160 RValue EmitReferenceBindingToExpr(const Expr* E, bool IsInitializer = false);
Anders Carlsson3aba0932010-01-31 18:34:51 +00001161
Chris Lattner883f6a72007-08-11 00:04:45 +00001162 //===--------------------------------------------------------------------===//
Chris Lattnerbfc0c1a2007-08-26 23:13:56 +00001163 // Expression Emission
Chris Lattner883f6a72007-08-11 00:04:45 +00001164 //===--------------------------------------------------------------------===//
Chris Lattnerbfc0c1a2007-08-26 23:13:56 +00001165
1166 // Expressions are broken into three classes: scalar, complex, aggregate.
Mike Stump0dd9e882009-02-08 23:14:22 +00001167
1168 /// EmitScalarExpr - Emit the computation of the specified expression of LLVM
1169 /// scalar type, returning the result.
Anders Carlsson14c5cbf2009-08-16 07:36:22 +00001170 llvm::Value *EmitScalarExpr(const Expr *E , bool IgnoreResultAssign = false);
Mike Stump0dd9e882009-02-08 23:14:22 +00001171
Chris Lattner3707b252007-08-26 06:48:56 +00001172 /// EmitScalarConversion - Emit a conversion from the specified type to the
1173 /// specified destination type, both of which are LLVM scalar types.
1174 llvm::Value *EmitScalarConversion(llvm::Value *Src, QualType SrcTy,
1175 QualType DstTy);
Mike Stump0dd9e882009-02-08 23:14:22 +00001176
Chris Lattner4f1a7b32007-08-26 16:34:22 +00001177 /// EmitComplexToScalarConversion - Emit a conversion from the specified
Mike Stump0dd9e882009-02-08 23:14:22 +00001178 /// complex type to the specified destination type, where the destination type
1179 /// is an LLVM scalar type.
Chris Lattner4f1a7b32007-08-26 16:34:22 +00001180 llvm::Value *EmitComplexToScalarConversion(ComplexPairTy Src, QualType SrcTy,
1181 QualType DstTy);
Mike Stump0dd9e882009-02-08 23:14:22 +00001182
1183
Chris Lattner883f6a72007-08-11 00:04:45 +00001184 /// EmitAggExpr - Emit the computation of the specified expression of
1185 /// aggregate type. The result is computed into DestPtr. Note that if
1186 /// DestPtr is null, the value of the aggregate expression is not needed.
Mike Stump49d1cd52009-05-26 22:03:21 +00001187 void EmitAggExpr(const Expr *E, llvm::Value *DestPtr, bool VolatileDest,
Fariborz Jahanian08c32132009-08-31 19:33:16 +00001188 bool IgnoreResult = false, bool IsInitializer = false,
1189 bool RequiresGCollection = false);
Mike Stump0dd9e882009-02-08 23:14:22 +00001190
Daniel Dunbar18aba0d2010-02-05 19:38:31 +00001191 /// EmitAggExprToLValue - Emit the computation of the specified expression of
1192 /// aggregate type into a temporary LValue.
1193 LValue EmitAggExprToLValue(const Expr *E);
1194
Fariborz Jahanian082b02e2009-07-08 01:18:33 +00001195 /// EmitGCMemmoveCollectable - Emit special API for structs with object
1196 /// pointers.
1197 void EmitGCMemmoveCollectable(llvm::Value *DestPtr, llvm::Value *SrcPtr,
Fariborz Jahanian08c32132009-08-31 19:33:16 +00001198 QualType Ty);
Fariborz Jahanian082b02e2009-07-08 01:18:33 +00001199
Chris Lattnerb6ef18a2007-08-21 05:54:00 +00001200 /// EmitComplexExpr - Emit the computation of the specified expression of
Chris Lattner23b1cdb2007-08-23 23:43:33 +00001201 /// complex type, returning the result.
Mike Stump7f79f9b2009-05-29 15:46:01 +00001202 ComplexPairTy EmitComplexExpr(const Expr *E, bool IgnoreReal = false,
1203 bool IgnoreImag = false,
1204 bool IgnoreRealAssign = false,
1205 bool IgnoreImagAssign = false);
Mike Stump0dd9e882009-02-08 23:14:22 +00001206
Chris Lattner23b1cdb2007-08-23 23:43:33 +00001207 /// EmitComplexExprIntoAddr - Emit the computation of the specified expression
1208 /// of complex type, storing into the specified Value*.
Chris Lattner190dbe22007-08-26 16:22:13 +00001209 void EmitComplexExprIntoAddr(const Expr *E, llvm::Value *DestAddr,
1210 bool DestIsVolatile);
Daniel Dunbar7f8ea5c2008-08-30 05:35:15 +00001211
1212 /// StoreComplexToAddr - Store a complex number into the specified address.
1213 void StoreComplexToAddr(ComplexPairTy V, llvm::Value *DestAddr,
1214 bool DestIsVolatile);
Chris Lattner9b655512007-08-31 22:49:20 +00001215 /// LoadComplexFromAddr - Load a complex number from the specified address.
1216 ComplexPairTy LoadComplexFromAddr(llvm::Value *SrcAddr, bool SrcIsVolatile);
Chris Lattner2621fd12008-05-08 05:58:21 +00001217
Mike Stumpf71d2322009-11-30 20:08:49 +00001218 /// CreateStaticBlockVarDecl - Create a zero-initialized LLVM global for a
1219 /// static block var decl.
Chris Lattner761acc12009-12-05 08:22:11 +00001220 llvm::GlobalVariable *CreateStaticBlockVarDecl(const VarDecl &D,
1221 const char *Separator,
Mike Stumpf71d2322009-11-30 20:08:49 +00001222 llvm::GlobalValue::LinkageTypes Linkage);
Chris Lattner761acc12009-12-05 08:22:11 +00001223
1224 /// AddInitializerToGlobalBlockVarDecl - Add the initializer for 'D' to the
1225 /// global variable that has already been created for it. If the initializer
1226 /// has a different type than GV does, this may free GV and return a different
1227 /// one. Otherwise it just returns GV.
1228 llvm::GlobalVariable *
1229 AddInitializerToGlobalBlockVarDecl(const VarDecl &D,
1230 llvm::GlobalVariable *GV);
1231
Daniel Dunbar0096acf2009-02-25 19:24:29 +00001232
Mike Stumpf71d2322009-11-30 20:08:49 +00001233 /// EmitStaticCXXBlockVarDeclInit - Create the initializer for a C++ runtime
1234 /// initialized static block var decl.
Anders Carlsson3b2e16b2009-08-08 21:45:14 +00001235 void EmitStaticCXXBlockVarDeclInit(const VarDecl &D,
1236 llvm::GlobalVariable *GV);
Anders Carlssone1b29ef2008-08-22 16:00:37 +00001237
Anders Carlsson3b2e16b2009-08-08 21:45:14 +00001238 /// EmitCXXGlobalVarDeclInit - Create the initializer for a C++
1239 /// variable with global storage.
1240 void EmitCXXGlobalVarDeclInit(const VarDecl &D, llvm::Constant *DeclPtr);
1241
1242 /// EmitCXXGlobalDtorRegistration - Emits a call to register the global ptr
1243 /// with the C++ runtime so that its destructor will be called at exit.
Fariborz Jahanian88f42802009-11-10 19:24:06 +00001244 void EmitCXXGlobalDtorRegistration(llvm::Constant *DtorFn,
Anders Carlsson3b2e16b2009-08-08 21:45:14 +00001245 llvm::Constant *DeclPtr);
Mike Stump1eb44332009-09-09 15:08:12 +00001246
Daniel Dunbarefb0fa92010-03-20 04:15:41 +00001247 /// GenerateCXXGlobalInitFunc - Generates code for initializing global
1248 /// variables.
1249 void GenerateCXXGlobalInitFunc(llvm::Function *Fn,
1250 llvm::Constant **Decls,
1251 unsigned NumDecls);
1252
1253 /// GenerateCXXGlobalDtorFunc - Generates code for destroying global
1254 /// variables.
1255 void GenerateCXXGlobalDtorFunc(llvm::Function *Fn,
1256 const std::vector<std::pair<llvm::Constant*,
1257 llvm::Constant*> > &DtorsAndObjects);
1258
1259 void GenerateCXXGlobalVarDeclInitFunc(llvm::Function *Fn, const VarDecl *D);
1260
Anders Carlsson31ccf372009-05-03 17:47:16 +00001261 void EmitCXXConstructExpr(llvm::Value *Dest, const CXXConstructExpr *E);
Mike Stump1eb44332009-09-09 15:08:12 +00001262
Anders Carlssonb58d0172009-05-30 23:23:33 +00001263 RValue EmitCXXExprWithTemporaries(const CXXExprWithTemporaries *E,
Mike Stump1eb44332009-09-09 15:08:12 +00001264 llvm::Value *AggLoc = 0,
Anders Carlsson14c5cbf2009-08-16 07:36:22 +00001265 bool IsAggLocVolatile = false,
1266 bool IsInitializer = false);
Mike Stump1eb44332009-09-09 15:08:12 +00001267
Anders Carlsson756b5c42009-10-30 01:42:31 +00001268 void EmitCXXThrowExpr(const CXXThrowExpr *E);
Mike Stumpc2e84ae2009-11-15 08:09:41 +00001269
Daniel Dunbar0ffb1252008-08-04 16:51:22 +00001270 //===--------------------------------------------------------------------===//
1271 // Internal Helpers
1272 //===--------------------------------------------------------------------===//
Mike Stump0dd9e882009-02-08 23:14:22 +00001273
Chris Lattner0946ccd2008-11-11 07:41:27 +00001274 /// ContainsLabel - Return true if the statement contains a label in it. If
1275 /// this statement is not executed normally, it not containing a label means
1276 /// that we can just remove the code.
1277 static bool ContainsLabel(const Stmt *S, bool IgnoreCaseStmts = false);
Mike Stump0dd9e882009-02-08 23:14:22 +00001278
Daniel Dunbar4bc04552008-11-12 10:12:14 +00001279 /// ConstantFoldsToSimpleInteger - If the specified expression does not fold
Chris Lattner31a09842008-11-12 08:04:58 +00001280 /// to a constant, or if it does but contains a label, return 0. If it
1281 /// constant folds to 'true' and does not contain a label, return 1, if it
1282 /// constant folds to 'false' and does not contain a label, return -1.
1283 int ConstantFoldsToSimpleInteger(const Expr *Cond);
Mike Stump0dd9e882009-02-08 23:14:22 +00001284
Chris Lattner31a09842008-11-12 08:04:58 +00001285 /// EmitBranchOnBoolExpr - Emit a branch on a boolean condition (e.g. for an
1286 /// if statement) to the specified blocks. Based on the condition, this might
1287 /// try to simplify the codegen of the conditional based on the branch.
Chris Lattner9bc47e22008-11-12 07:46:33 +00001288 void EmitBranchOnBoolExpr(const Expr *Cond, llvm::BasicBlock *TrueBlock,
Daniel Dunbar4bc04552008-11-12 10:12:14 +00001289 llvm::BasicBlock *FalseBlock);
Mike Stumpbe07f602009-12-14 21:58:14 +00001290
Mike Stump15037ca2009-12-15 00:35:12 +00001291 /// getTrapBB - Create a basic block that will call the trap intrinsic. We'll
1292 /// generate a branch around the created basic block as necessary.
1293 llvm::BasicBlock* getTrapBB();
Anders Carlsson21c9ad92010-03-30 03:27:09 +00001294
1295 /// EmitCallArg - Emit a single call argument.
1296 RValue EmitCallArg(const Expr *E, QualType ArgType);
1297
Chris Lattner31a09842008-11-12 08:04:58 +00001298private:
Mike Stump0dd9e882009-02-08 23:14:22 +00001299
Daniel Dunbar29e0bcc2008-09-24 04:00:38 +00001300 void EmitReturnOfRValue(RValue RV, QualType Ty);
1301
Daniel Dunbar56273772008-09-17 00:51:38 +00001302 /// ExpandTypeFromArgs - Reconstruct a structure of type \arg Ty
1303 /// from function arguments into \arg Dst. See ABIArgInfo::Expand.
1304 ///
1305 /// \param AI - The first function argument of the expansion.
1306 /// \return The argument following the last expanded function
1307 /// argument.
Mike Stump0dd9e882009-02-08 23:14:22 +00001308 llvm::Function::arg_iterator
Daniel Dunbar56273772008-09-17 00:51:38 +00001309 ExpandTypeFromArgs(QualType Ty, LValue Dst,
1310 llvm::Function::arg_iterator AI);
1311
Mike Stump0dd9e882009-02-08 23:14:22 +00001312 /// ExpandTypeToArgs - Expand an RValue \arg Src, with the LLVM type for \arg
1313 /// Ty, into individual arguments on the provided vector \arg Args. See
1314 /// ABIArgInfo::Expand.
1315 void ExpandTypeToArgs(QualType Ty, RValue Src,
Daniel Dunbar56273772008-09-17 00:51:38 +00001316 llvm::SmallVector<llvm::Value*, 16> &Args);
Anders Carlssonc8c7b182009-01-11 19:40:10 +00001317
Mike Stump1eb44332009-09-09 15:08:12 +00001318 llvm::Value* EmitAsmInput(const AsmStmt &S,
Daniel Dunbarb84e8a62009-05-04 06:56:16 +00001319 const TargetInfo::ConstraintInfo &Info,
Anders Carlssonc8c7b182009-01-11 19:40:10 +00001320 const Expr *InputExpr, std::string &ConstraintStr);
Mike Stump0dd9e882009-02-08 23:14:22 +00001321
Anders Carlssonc71c8452009-02-07 23:50:39 +00001322 /// EmitCleanupBlock - emits a single cleanup block.
1323 void EmitCleanupBlock();
1324
Anders Carlsson87eaf172009-02-08 00:50:42 +00001325 /// AddBranchFixup - adds a branch instruction to the list of fixups for the
1326 /// current cleanup scope.
1327 void AddBranchFixup(llvm::BranchInst *BI);
Mike Stump0dd9e882009-02-08 23:14:22 +00001328
Anders Carlsson0139bb92009-04-08 20:47:54 +00001329 /// EmitCallArgs - Emit call arguments for a function.
Mike Stump1eb44332009-09-09 15:08:12 +00001330 /// The CallArgTypeInfo parameter is used for iterating over the known
Anders Carlssonaf23f692009-04-18 20:20:22 +00001331 /// argument types of the function being called.
1332 template<typename T>
1333 void EmitCallArgs(CallArgList& Args, const T* CallArgTypeInfo,
Anders Carlsson0139bb92009-04-08 20:47:54 +00001334 CallExpr::const_arg_iterator ArgBeg,
Anders Carlssonaf23f692009-04-18 20:20:22 +00001335 CallExpr::const_arg_iterator ArgEnd) {
1336 CallExpr::const_arg_iterator Arg = ArgBeg;
Anders Carlsson0139bb92009-04-08 20:47:54 +00001337
Anders Carlssonaf23f692009-04-18 20:20:22 +00001338 // First, use the argument types that the type info knows about
1339 if (CallArgTypeInfo) {
1340 for (typename T::arg_type_iterator I = CallArgTypeInfo->arg_type_begin(),
1341 E = CallArgTypeInfo->arg_type_end(); I != E; ++I, ++Arg) {
Eli Friedman44b0a3e2009-11-18 03:42:04 +00001342 assert(Arg != ArgEnd && "Running over edge of argument list!");
Anders Carlssonaf23f692009-04-18 20:20:22 +00001343 QualType ArgType = *I;
1344
1345 assert(getContext().getCanonicalType(ArgType.getNonReferenceType()).
Mike Stump1eb44332009-09-09 15:08:12 +00001346 getTypePtr() ==
1347 getContext().getCanonicalType(Arg->getType()).getTypePtr() &&
Anders Carlssonaf23f692009-04-18 20:20:22 +00001348 "type mismatch in call argument!");
Mike Stump1eb44332009-09-09 15:08:12 +00001349
1350 Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType),
Anders Carlssonaf23f692009-04-18 20:20:22 +00001351 ArgType));
1352 }
Mike Stump1eb44332009-09-09 15:08:12 +00001353
1354 // Either we've emitted all the call args, or we have a call to a
Anders Carlssonaf23f692009-04-18 20:20:22 +00001355 // variadic function.
Mike Stump1eb44332009-09-09 15:08:12 +00001356 assert((Arg == ArgEnd || CallArgTypeInfo->isVariadic()) &&
Anders Carlssonaf23f692009-04-18 20:20:22 +00001357 "Extra arguments in non-variadic function!");
Mike Stump1eb44332009-09-09 15:08:12 +00001358
Anders Carlssonaf23f692009-04-18 20:20:22 +00001359 }
Mike Stump1eb44332009-09-09 15:08:12 +00001360
Anders Carlssonaf23f692009-04-18 20:20:22 +00001361 // If we still have any arguments, emit them using the type of the argument.
1362 for (; Arg != ArgEnd; ++Arg) {
1363 QualType ArgType = Arg->getType();
1364 Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType),
1365 ArgType));
1366 }
1367 }
John McCall492c4f92010-03-03 04:15:11 +00001368
1369 const TargetCodeGenInfo &getTargetHooks() const {
1370 return CGM.getTargetCodeGenInfo();
1371 }
Reid Spencer5f016e22007-07-11 17:01:13 +00001372};
Mike Stump1eb44332009-09-09 15:08:12 +00001373
Anders Carlssonaf23f692009-04-18 20:20:22 +00001374
Reid Spencer5f016e22007-07-11 17:01:13 +00001375} // end namespace CodeGen
1376} // end namespace clang
1377
1378#endif