2007-07-11 21:01:13 +04:00
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//===--- CodeGenModule.cpp - Emit LLVM Code from ASTs for a Module --------===//
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//
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// The LLVM Compiler Infrastructure
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//
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2007-12-29 22:59:25 +03:00
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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2007-07-11 21:01:13 +04:00
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//
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//===----------------------------------------------------------------------===//
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//
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// This coordinates the per-module state used while generating code.
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//
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//===----------------------------------------------------------------------===//
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#include "CodeGenModule.h"
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#include "CodeGenFunction.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Decl.h"
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2007-12-02 10:19:18 +03:00
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#include "clang/Basic/Diagnostic.h"
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2007-11-28 08:34:05 +03:00
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#include "clang/Basic/LangOptions.h"
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2008-04-19 08:17:09 +04:00
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#include "clang/Basic/SourceManager.h"
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2007-07-11 21:01:13 +04:00
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#include "clang/Basic/TargetInfo.h"
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2008-03-09 06:09:36 +03:00
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#include "llvm/CallingConv.h"
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2007-07-14 04:23:28 +04:00
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#include "llvm/Constants.h"
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2007-07-11 21:01:13 +04:00
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#include "llvm/DerivedTypes.h"
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2007-08-31 08:31:45 +04:00
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#include "llvm/Module.h"
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2007-07-11 21:01:13 +04:00
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#include "llvm/Intrinsics.h"
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2007-12-02 11:49:54 +03:00
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#include <algorithm>
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2007-07-11 21:01:13 +04:00
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using namespace clang;
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using namespace CodeGen;
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2007-11-28 08:34:05 +03:00
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CodeGenModule::CodeGenModule(ASTContext &C, const LangOptions &LO,
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2007-12-02 04:40:18 +03:00
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llvm::Module &M, const llvm::TargetData &TD,
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Diagnostic &diags)
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: Context(C), Features(LO), TheModule(M), TheTargetData(TD), Diags(diags),
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2008-03-01 11:45:05 +03:00
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Types(C, M, TD), MemCpyFn(0), MemSetFn(0), CFConstantStringClassRef(0) {
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//TODO: Make this selectable at runtime
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2008-03-31 03:03:07 +04:00
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Runtime = CreateObjCRuntime(M,
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getTypes().ConvertType(getContext().IntTy),
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getTypes().ConvertType(getContext().LongTy));
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2008-03-01 11:45:05 +03:00
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}
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CodeGenModule::~CodeGenModule() {
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2008-03-31 03:03:07 +04:00
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llvm::Function *ObjCInitFunction = Runtime->ModuleInitFunction();
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2008-03-31 03:25:33 +04:00
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if (ObjCInitFunction)
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2008-03-31 03:03:07 +04:00
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AddGlobalCtor(ObjCInitFunction);
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2008-04-20 10:29:50 +04:00
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EmitStatics();
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2008-03-14 20:18:18 +03:00
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EmitGlobalCtors();
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2008-04-19 03:43:57 +04:00
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EmitAnnotations();
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2008-03-01 11:45:05 +03:00
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delete Runtime;
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}
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2007-07-11 21:01:13 +04:00
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2007-12-02 10:19:18 +03:00
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/// WarnUnsupported - Print out a warning that codegen doesn't support the
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/// specified stmt yet.
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void CodeGenModule::WarnUnsupported(const Stmt *S, const char *Type) {
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unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Warning,
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"cannot codegen this %0 yet");
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SourceRange Range = S->getSourceRange();
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std::string Msg = Type;
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2007-12-13 01:39:36 +03:00
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getDiags().Report(Context.getFullLoc(S->getLocStart()), DiagID,
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2007-12-12 00:27:55 +03:00
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&Msg, 1, &Range, 1);
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2007-12-02 10:19:18 +03:00
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}
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2007-12-02 09:27:33 +03:00
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2008-01-12 10:05:38 +03:00
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/// WarnUnsupported - Print out a warning that codegen doesn't support the
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/// specified decl yet.
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void CodeGenModule::WarnUnsupported(const Decl *D, const char *Type) {
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unsigned DiagID = getDiags().getCustomDiagID(Diagnostic::Warning,
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"cannot codegen this %0 yet");
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std::string Msg = Type;
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getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID,
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&Msg, 1);
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}
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2008-03-14 20:18:18 +03:00
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/// AddGlobalCtor - Add a function to the list that will be called before
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/// main() runs.
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void CodeGenModule::AddGlobalCtor(llvm::Function * Ctor) {
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// TODO: Type coercion of void()* types.
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GlobalCtors.push_back(Ctor);
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}
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2008-03-31 03:03:07 +04:00
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/// EmitGlobalCtors - Generates the array of contsturctor functions to be
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/// called on module load, if any have been registered with AddGlobalCtor.
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2008-03-14 20:18:18 +03:00
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void CodeGenModule::EmitGlobalCtors() {
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2008-03-31 03:03:07 +04:00
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if (GlobalCtors.empty()) return;
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2008-03-31 03:25:33 +04:00
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2008-03-14 20:18:18 +03:00
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// Get the type of @llvm.global_ctors
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std::vector<const llvm::Type*> CtorFields;
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CtorFields.push_back(llvm::IntegerType::get(32));
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// Constructor function type
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std::vector<const llvm::Type*> VoidArgs;
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2008-03-31 03:25:33 +04:00
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llvm::FunctionType* CtorFuncTy =
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llvm::FunctionType::get(llvm::Type::VoidTy, VoidArgs, false);
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2008-03-14 20:18:18 +03:00
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// i32, function type pair
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2008-03-19 08:24:56 +03:00
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const llvm::Type *FPType = llvm::PointerType::getUnqual(CtorFuncTy);
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llvm::StructType* CtorStructTy =
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llvm::StructType::get(llvm::Type::Int32Ty, FPType, NULL);
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2008-03-14 20:18:18 +03:00
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// Array of fields
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2008-03-19 08:24:56 +03:00
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llvm::ArrayType* GlobalCtorsTy =
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llvm::ArrayType::get(CtorStructTy, GlobalCtors.size());
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2008-03-14 20:18:18 +03:00
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// Define the global variable
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2008-03-19 08:24:56 +03:00
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llvm::GlobalVariable *GlobalCtorsVal =
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new llvm::GlobalVariable(GlobalCtorsTy, false,
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llvm::GlobalValue::AppendingLinkage,
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(llvm::Constant*)0, "llvm.global_ctors",
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&TheModule);
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2008-03-14 20:18:18 +03:00
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// Populate the array
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std::vector<llvm::Constant*> CtorValues;
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2008-03-19 08:24:56 +03:00
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llvm::Constant *MagicNumber =
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llvm::ConstantInt::get(llvm::Type::Int32Ty, 65535, false);
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std::vector<llvm::Constant*> StructValues;
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2008-03-14 20:18:18 +03:00
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for (std::vector<llvm::Constant*>::iterator I = GlobalCtors.begin(),
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2008-03-19 08:24:56 +03:00
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E = GlobalCtors.end(); I != E; ++I) {
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StructValues.clear();
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2008-03-14 20:18:18 +03:00
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StructValues.push_back(MagicNumber);
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StructValues.push_back(*I);
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2008-03-19 08:24:56 +03:00
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CtorValues.push_back(llvm::ConstantStruct::get(CtorStructTy, StructValues));
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2008-03-14 20:18:18 +03:00
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}
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2008-03-19 08:24:56 +03:00
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GlobalCtorsVal->setInitializer(llvm::ConstantArray::get(GlobalCtorsTy,
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CtorValues));
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2008-03-14 20:18:18 +03:00
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}
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2008-03-31 03:03:07 +04:00
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2008-04-19 03:43:57 +04:00
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void CodeGenModule::EmitAnnotations() {
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if (Annotations.empty())
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return;
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// Create a new global variable for the ConstantStruct in the Module.
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llvm::Constant *Array =
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llvm::ConstantArray::get(llvm::ArrayType::get(Annotations[0]->getType(),
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Annotations.size()),
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Annotations);
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llvm::GlobalValue *gv =
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new llvm::GlobalVariable(Array->getType(), false,
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llvm::GlobalValue::AppendingLinkage, Array,
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"llvm.global.annotations", &TheModule);
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gv->setSection("llvm.metadata");
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}
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2007-12-02 09:27:33 +03:00
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/// ReplaceMapValuesWith - This is a really slow and bad function that
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/// searches for any entries in GlobalDeclMap that point to OldVal, changing
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/// them to point to NewVal. This is badbadbad, FIXME!
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void CodeGenModule::ReplaceMapValuesWith(llvm::Constant *OldVal,
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llvm::Constant *NewVal) {
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for (llvm::DenseMap<const Decl*, llvm::Constant*>::iterator
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I = GlobalDeclMap.begin(), E = GlobalDeclMap.end(); I != E; ++I)
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if (I->second == OldVal) I->second = NewVal;
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}
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2007-12-02 10:09:19 +03:00
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llvm::Constant *CodeGenModule::GetAddrOfFunctionDecl(const FunctionDecl *D,
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bool isDefinition) {
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// See if it is already in the map. If so, just return it.
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2007-07-11 21:01:13 +04:00
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llvm::Constant *&Entry = GlobalDeclMap[D];
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if (Entry) return Entry;
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2007-12-02 10:09:19 +03:00
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const llvm::Type *Ty = getTypes().ConvertType(D->getType());
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// Check to see if the function already exists.
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llvm::Function *F = getModule().getFunction(D->getName());
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const llvm::FunctionType *FTy = cast<llvm::FunctionType>(Ty);
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// If it doesn't already exist, just create and return an entry.
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if (F == 0) {
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2007-07-11 21:01:13 +04:00
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// FIXME: param attributes for sext/zext etc.
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2008-04-20 10:29:50 +04:00
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F = llvm::Function::Create(FTy, llvm::Function::ExternalLinkage,
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D->getName(), &getModule());
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2008-03-09 06:09:36 +03:00
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// Set the appropriate calling convention for the Function.
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if (D->getAttr<FastCallAttr>())
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F->setCallingConv(llvm::CallingConv::Fast);
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return Entry = F;
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2007-07-11 21:01:13 +04:00
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}
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2007-12-02 10:09:19 +03:00
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// If the pointer type matches, just return it.
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2007-12-17 04:11:20 +03:00
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llvm::Type *PFTy = llvm::PointerType::getUnqual(Ty);
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2007-12-02 10:09:19 +03:00
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if (PFTy == F->getType()) return Entry = F;
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2007-12-02 09:30:46 +03:00
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2007-12-02 10:09:19 +03:00
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// If this isn't a definition, just return it casted to the right type.
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if (!isDefinition)
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return Entry = llvm::ConstantExpr::getBitCast(F, PFTy);
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// Otherwise, we have a definition after a prototype with the wrong type.
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// F is the Function* for the one with the wrong type, we must make a new
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// Function* and update everything that used F (a declaration) with the new
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// Function* (which will be a definition).
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//
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// This happens if there is a prototype for a function (e.g. "int f()") and
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// then a definition of a different type (e.g. "int f(int x)"). Start by
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// making a new function of the correct type, RAUW, then steal the name.
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2008-04-07 00:42:52 +04:00
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llvm::Function *NewFn = llvm::Function::Create(FTy,
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2007-12-02 10:09:19 +03:00
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llvm::Function::ExternalLinkage,
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"", &getModule());
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NewFn->takeName(F);
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// Replace uses of F with the Function we will endow with a body.
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llvm::Constant *NewPtrForOldDecl =
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llvm::ConstantExpr::getBitCast(NewFn, F->getType());
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F->replaceAllUsesWith(NewPtrForOldDecl);
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// FIXME: Update the globaldeclmap for the previous decl of this name. We
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// really want a way to walk all of these, but we don't have it yet. This
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// is incredibly slow!
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ReplaceMapValuesWith(F, NewPtrForOldDecl);
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// Ok, delete the old function now, which is dead.
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assert(F->isDeclaration() && "Shouldn't replace non-declaration");
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F->eraseFromParent();
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// Return the new function which has the right type.
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return Entry = NewFn;
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}
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2008-02-05 09:37:34 +03:00
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static bool IsZeroElementArray(const llvm::Type *Ty) {
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if (const llvm::ArrayType *ATy = dyn_cast<llvm::ArrayType>(Ty))
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return ATy->getNumElements() == 0;
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return false;
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}
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2007-12-18 11:16:44 +03:00
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llvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D,
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bool isDefinition) {
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assert(D->hasGlobalStorage() && "Not a global variable");
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2007-12-02 10:09:19 +03:00
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// See if it is already in the map.
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llvm::Constant *&Entry = GlobalDeclMap[D];
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if (Entry) return Entry;
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2008-02-04 05:31:56 +03:00
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QualType ASTTy = D->getType();
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const llvm::Type *Ty = getTypes().ConvertTypeForMem(ASTTy);
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2007-12-02 10:09:19 +03:00
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// Check to see if the global already exists.
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2008-02-02 07:43:11 +03:00
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llvm::GlobalVariable *GV = getModule().getGlobalVariable(D->getName(), true);
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2007-12-02 10:09:19 +03:00
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// If it doesn't already exist, just create and return an entry.
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if (GV == 0) {
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return Entry = new llvm::GlobalVariable(Ty, false,
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llvm::GlobalValue::ExternalLinkage,
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2008-02-04 05:31:56 +03:00
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0, D->getName(), &getModule(), 0,
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ASTTy.getAddressSpace());
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2007-12-02 09:30:46 +03:00
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}
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2007-12-02 10:09:19 +03:00
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// If the pointer type matches, just return it.
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2007-12-17 04:11:20 +03:00
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llvm::Type *PTy = llvm::PointerType::getUnqual(Ty);
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2007-12-02 10:09:19 +03:00
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if (PTy == GV->getType()) return Entry = GV;
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// If this isn't a definition, just return it casted to the right type.
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if (!isDefinition)
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return Entry = llvm::ConstantExpr::getBitCast(GV, PTy);
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// Otherwise, we have a definition after a prototype with the wrong type.
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// GV is the GlobalVariable* for the one with the wrong type, we must make a
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/// new GlobalVariable* and update everything that used GV (a declaration)
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// with the new GlobalVariable* (which will be a definition).
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//
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// This happens if there is a prototype for a global (e.g. "extern int x[];")
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// and then a definition of a different type (e.g. "int x[10];"). Start by
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// making a new global of the correct type, RAUW, then steal the name.
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llvm::GlobalVariable *NewGV =
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new llvm::GlobalVariable(Ty, false, llvm::GlobalValue::ExternalLinkage,
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2008-02-04 05:31:56 +03:00
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0, D->getName(), &getModule(), 0,
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ASTTy.getAddressSpace());
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2007-12-02 10:09:19 +03:00
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NewGV->takeName(GV);
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// Replace uses of GV with the globalvalue we will endow with a body.
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llvm::Constant *NewPtrForOldDecl =
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llvm::ConstantExpr::getBitCast(NewGV, GV->getType());
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GV->replaceAllUsesWith(NewPtrForOldDecl);
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// FIXME: Update the globaldeclmap for the previous decl of this name. We
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// really want a way to walk all of these, but we don't have it yet. This
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// is incredibly slow!
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ReplaceMapValuesWith(GV, NewPtrForOldDecl);
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2008-02-05 09:37:34 +03:00
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// Verify that GV was a declaration or something like x[] which turns into
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// [0 x type].
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assert((GV->isDeclaration() ||
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IsZeroElementArray(GV->getType()->getElementType())) &&
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"Shouldn't replace non-declaration");
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2007-12-02 10:09:19 +03:00
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// Ok, delete the old global now, which is dead.
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GV->eraseFromParent();
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|
|
// Return the new global which has the right type.
|
|
|
|
return Entry = NewGV;
|
2007-07-11 21:01:13 +04:00
|
|
|
}
|
|
|
|
|
2007-12-02 10:09:19 +03:00
|
|
|
|
2008-03-31 03:03:07 +04:00
|
|
|
void CodeGenModule::EmitObjCMethod(const ObjCMethodDecl *OMD) {
|
|
|
|
// If this is not a prototype, emit the body.
|
|
|
|
if (OMD->getBody())
|
|
|
|
CodeGenFunction(*this).GenerateObjCMethod(OMD);
|
|
|
|
}
|
|
|
|
|
2007-07-13 09:13:43 +04:00
|
|
|
void CodeGenModule::EmitFunction(const FunctionDecl *FD) {
|
2007-07-11 21:01:13 +04:00
|
|
|
// If this is not a prototype, emit the body.
|
2008-04-20 10:29:50 +04:00
|
|
|
if (FD->getBody()) {
|
|
|
|
// If the function is a static, defer code generation until later so we can
|
|
|
|
// easily omit unused statics.
|
|
|
|
if (FD->getStorageClass() == FunctionDecl::Static) {
|
|
|
|
StaticDecls.push_back(FD);
|
|
|
|
return;
|
|
|
|
}
|
2007-07-11 21:01:13 +04:00
|
|
|
CodeGenFunction(*this).GenerateCode(FD);
|
2008-04-20 10:29:50 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void CodeGenModule::EmitStatics() {
|
|
|
|
// Emit code for each used static decl encountered. Since a previously unused
|
|
|
|
// static decl may become used during the generation of code for a static
|
|
|
|
// function, iterate until no changes are made.
|
|
|
|
bool Changed;
|
|
|
|
do {
|
|
|
|
Changed = false;
|
|
|
|
for (unsigned i = 0, e = StaticDecls.size(); i != e; ++i) {
|
|
|
|
// Check the map of used decls for our static. If not found, continue.
|
|
|
|
const Decl *D = StaticDecls[i];
|
|
|
|
if (GlobalDeclMap[D] == 0)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
// If this is a function decl, generate code for the static function if it
|
|
|
|
// has a body. Otherwise, we must have a var decl for a static global
|
|
|
|
// variable.
|
|
|
|
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
|
|
|
|
if (FD->getBody())
|
|
|
|
CodeGenFunction(*this).GenerateCode(FD);
|
|
|
|
} else {
|
|
|
|
const VarDecl *VD = cast<VarDecl>(D);
|
|
|
|
EmitGlobalVarInit(VD);
|
|
|
|
}
|
|
|
|
// Erase the used decl from the list.
|
|
|
|
StaticDecls[i] = StaticDecls.back();
|
|
|
|
StaticDecls.pop_back();
|
|
|
|
--i;
|
|
|
|
--e;
|
|
|
|
|
|
|
|
// Remember that we made a change.
|
|
|
|
Changed = true;
|
|
|
|
}
|
|
|
|
} while (Changed);
|
|
|
|
|
|
|
|
// Warn about all statics that are still unused at end of code generation.
|
|
|
|
for (unsigned i = 0, e = StaticDecls.size(); i != e; ++i) {
|
|
|
|
const Decl *D = StaticDecls[i];
|
|
|
|
std::string Msg = cast<NamedDecl>(D)->getName();
|
|
|
|
getDiags().Report(Context.getFullLoc(D->getLocation()),
|
|
|
|
diag::warn_unused_static, &Msg, 1);
|
|
|
|
}
|
2007-07-11 21:01:13 +04:00
|
|
|
}
|
|
|
|
|
2008-01-26 04:36:00 +03:00
|
|
|
llvm::Constant *CodeGenModule::EmitGlobalInit(const Expr *Expr) {
|
|
|
|
return EmitConstantExpr(Expr);
|
2007-10-31 00:27:20 +03:00
|
|
|
}
|
|
|
|
|
2008-04-19 08:17:09 +04:00
|
|
|
/// EmitAnnotateAttr - Generate the llvm::ConstantStruct which contains the
|
|
|
|
/// annotation information for a given GlobalValue. The annotation struct is
|
|
|
|
/// {i8 *, i8 *, i8 *, i32}. The first field is a constant expression, the
|
|
|
|
/// GlobalValue being annotated. The second filed is thee constant string
|
|
|
|
/// created from the AnnotateAttr's annotation. The third field is a constant
|
|
|
|
/// string containing the name of the translation unit. The fourth field is
|
|
|
|
/// the line number in the file of the annotated value declaration.
|
|
|
|
///
|
|
|
|
/// FIXME: this does not unique the annotation string constants, as llvm-gcc
|
|
|
|
/// appears to.
|
|
|
|
///
|
|
|
|
llvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV,
|
|
|
|
const AnnotateAttr *AA,
|
|
|
|
unsigned LineNo) {
|
|
|
|
llvm::Module *M = &getModule();
|
|
|
|
|
|
|
|
// get [N x i8] constants for the annotation string, and the filename string
|
|
|
|
// which are the 2nd and 3rd elements of the global annotation structure.
|
|
|
|
const llvm::Type *SBP = llvm::PointerType::getUnqual(llvm::Type::Int8Ty);
|
|
|
|
llvm::Constant *anno = llvm::ConstantArray::get(AA->getAnnotation(), true);
|
|
|
|
llvm::Constant *unit = llvm::ConstantArray::get(M->getModuleIdentifier(),
|
|
|
|
true);
|
|
|
|
|
|
|
|
// Get the two global values corresponding to the ConstantArrays we just
|
|
|
|
// created to hold the bytes of the strings.
|
|
|
|
llvm::GlobalValue *annoGV =
|
|
|
|
new llvm::GlobalVariable(anno->getType(), false,
|
|
|
|
llvm::GlobalValue::InternalLinkage, anno,
|
|
|
|
GV->getName() + ".str", M);
|
|
|
|
// translation unit name string, emitted into the llvm.metadata section.
|
|
|
|
llvm::GlobalValue *unitGV =
|
|
|
|
new llvm::GlobalVariable(unit->getType(), false,
|
|
|
|
llvm::GlobalValue::InternalLinkage, unit, ".str", M);
|
|
|
|
|
|
|
|
// Create the ConstantStruct that is the global annotion.
|
|
|
|
llvm::Constant *Fields[4] = {
|
|
|
|
llvm::ConstantExpr::getBitCast(GV, SBP),
|
|
|
|
llvm::ConstantExpr::getBitCast(annoGV, SBP),
|
|
|
|
llvm::ConstantExpr::getBitCast(unitGV, SBP),
|
|
|
|
llvm::ConstantInt::get(llvm::Type::Int32Ty, LineNo)
|
|
|
|
};
|
|
|
|
return llvm::ConstantStruct::get(Fields, 4, false);
|
|
|
|
}
|
|
|
|
|
2008-04-16 02:42:06 +04:00
|
|
|
void CodeGenModule::EmitGlobalVar(const VarDecl *D) {
|
2008-04-20 10:29:50 +04:00
|
|
|
// If the VarDecl is a static, defer code generation until later so we can
|
|
|
|
// easily omit unused statics.
|
|
|
|
if (D->getStorageClass() == VarDecl::Static) {
|
|
|
|
StaticDecls.push_back(D);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2007-12-02 10:09:19 +03:00
|
|
|
// If this is just a forward declaration of the variable, don't emit it now,
|
|
|
|
// allow it to be emitted lazily on its first use.
|
2007-07-13 09:13:43 +04:00
|
|
|
if (D->getStorageClass() == VarDecl::Extern && D->getInit() == 0)
|
|
|
|
return;
|
2007-12-02 10:09:19 +03:00
|
|
|
|
2008-04-20 10:29:50 +04:00
|
|
|
EmitGlobalVarInit(D);
|
|
|
|
}
|
|
|
|
|
|
|
|
void CodeGenModule::EmitGlobalVarInit(const VarDecl *D) {
|
2007-12-02 10:09:19 +03:00
|
|
|
// Get the global, forcing it to be a direct reference.
|
|
|
|
llvm::GlobalVariable *GV =
|
2007-12-18 11:16:44 +03:00
|
|
|
cast<llvm::GlobalVariable>(GetAddrOfGlobalVar(D, true));
|
2007-12-02 10:09:19 +03:00
|
|
|
|
|
|
|
// Convert the initializer, or use zero if appropriate.
|
2007-07-14 04:23:28 +04:00
|
|
|
llvm::Constant *Init = 0;
|
|
|
|
if (D->getInit() == 0) {
|
2007-07-13 09:13:43 +04:00
|
|
|
Init = llvm::Constant::getNullValue(GV->getType()->getElementType());
|
2007-07-14 04:23:28 +04:00
|
|
|
} else if (D->getType()->isIntegerType()) {
|
2007-10-17 19:00:17 +04:00
|
|
|
llvm::APSInt Value(static_cast<uint32_t>(
|
2008-03-05 21:54:05 +03:00
|
|
|
getContext().getTypeSize(D->getInit()->getType())));
|
2007-07-16 03:26:56 +04:00
|
|
|
if (D->getInit()->isIntegerConstantExpr(Value, Context))
|
2007-07-14 04:23:28 +04:00
|
|
|
Init = llvm::ConstantInt::get(Value);
|
|
|
|
}
|
2007-10-26 20:31:40 +04:00
|
|
|
|
2007-10-31 00:27:20 +03:00
|
|
|
if (!Init)
|
2007-12-02 03:11:25 +03:00
|
|
|
Init = EmitGlobalInit(D->getInit());
|
2007-10-31 00:27:20 +03:00
|
|
|
|
2008-04-19 08:17:09 +04:00
|
|
|
if (const AnnotateAttr *AA = D->getAttr<AnnotateAttr>()) {
|
|
|
|
SourceManager &SM = Context.getSourceManager();
|
|
|
|
AddAnnotation(EmitAnnotateAttr(GV, AA,
|
|
|
|
SM.getLogicalLineNumber(D->getLocation())));
|
|
|
|
}
|
|
|
|
|
2007-12-10 03:05:55 +03:00
|
|
|
assert(GV->getType()->getElementType() == Init->getType() &&
|
|
|
|
"Initializer codegen type mismatch!");
|
2007-07-13 09:13:43 +04:00
|
|
|
GV->setInitializer(Init);
|
2008-03-03 06:28:21 +03:00
|
|
|
|
|
|
|
if (const VisibilityAttr *attr = D->getAttr<VisibilityAttr>())
|
|
|
|
GV->setVisibility(attr->getVisibility());
|
|
|
|
// FIXME: else handle -fvisibility
|
2007-07-13 09:13:43 +04:00
|
|
|
|
|
|
|
// Set the llvm linkage type as appropriate.
|
2008-03-03 06:28:21 +03:00
|
|
|
if (D->getAttr<DLLImportAttr>())
|
|
|
|
GV->setLinkage(llvm::Function::DLLImportLinkage);
|
|
|
|
else if (D->getAttr<DLLExportAttr>())
|
|
|
|
GV->setLinkage(llvm::Function::DLLExportLinkage);
|
|
|
|
else if (D->getAttr<WeakAttr>()) {
|
|
|
|
GV->setLinkage(llvm::GlobalVariable::WeakLinkage);
|
|
|
|
|
|
|
|
} else {
|
|
|
|
// FIXME: This isn't right. This should handle common linkage and other
|
|
|
|
// stuff.
|
|
|
|
switch (D->getStorageClass()) {
|
|
|
|
case VarDecl::Auto:
|
|
|
|
case VarDecl::Register:
|
|
|
|
assert(0 && "Can't have auto or register globals");
|
|
|
|
case VarDecl::None:
|
|
|
|
if (!D->getInit())
|
|
|
|
GV->setLinkage(llvm::GlobalVariable::WeakLinkage);
|
|
|
|
break;
|
|
|
|
case VarDecl::Extern:
|
|
|
|
case VarDecl::PrivateExtern:
|
|
|
|
// todo: common
|
|
|
|
break;
|
|
|
|
case VarDecl::Static:
|
|
|
|
GV->setLinkage(llvm::GlobalVariable::InternalLinkage);
|
|
|
|
break;
|
|
|
|
}
|
2007-07-13 09:13:43 +04:00
|
|
|
}
|
|
|
|
}
|
2007-07-11 21:01:13 +04:00
|
|
|
|
2007-07-14 04:16:50 +04:00
|
|
|
/// EmitGlobalVarDeclarator - Emit all the global vars attached to the specified
|
|
|
|
/// declarator chain.
|
2008-04-16 02:42:06 +04:00
|
|
|
void CodeGenModule::EmitGlobalVarDeclarator(const VarDecl *D) {
|
|
|
|
for (; D; D = cast_or_null<VarDecl>(D->getNextDeclarator()))
|
|
|
|
if (D->isFileVarDecl())
|
|
|
|
EmitGlobalVar(D);
|
2007-07-14 04:16:50 +04:00
|
|
|
}
|
2007-07-11 21:01:13 +04:00
|
|
|
|
2008-02-06 08:08:19 +03:00
|
|
|
void CodeGenModule::UpdateCompletedType(const TagDecl *TD) {
|
|
|
|
// Make sure that this type is translated.
|
|
|
|
Types.UpdateCompletedType(TD);
|
2008-02-05 11:06:13 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2007-08-31 08:31:45 +04:00
|
|
|
/// getBuiltinLibFunction
|
|
|
|
llvm::Function *CodeGenModule::getBuiltinLibFunction(unsigned BuiltinID) {
|
2007-12-13 03:38:03 +03:00
|
|
|
if (BuiltinID > BuiltinFunctions.size())
|
|
|
|
BuiltinFunctions.resize(BuiltinID);
|
2007-08-31 08:31:45 +04:00
|
|
|
|
2007-12-13 03:38:03 +03:00
|
|
|
// Cache looked up functions. Since builtin id #0 is invalid we don't reserve
|
|
|
|
// a slot for it.
|
|
|
|
assert(BuiltinID && "Invalid Builtin ID");
|
|
|
|
llvm::Function *&FunctionSlot = BuiltinFunctions[BuiltinID-1];
|
2007-08-31 08:31:45 +04:00
|
|
|
if (FunctionSlot)
|
|
|
|
return FunctionSlot;
|
|
|
|
|
|
|
|
assert(Context.BuiltinInfo.isLibFunction(BuiltinID) && "isn't a lib fn");
|
|
|
|
|
|
|
|
// Get the name, skip over the __builtin_ prefix.
|
|
|
|
const char *Name = Context.BuiltinInfo.GetName(BuiltinID)+10;
|
|
|
|
|
|
|
|
// Get the type for the builtin.
|
|
|
|
QualType Type = Context.BuiltinInfo.GetBuiltinType(BuiltinID, Context);
|
|
|
|
const llvm::FunctionType *Ty =
|
|
|
|
cast<llvm::FunctionType>(getTypes().ConvertType(Type));
|
|
|
|
|
|
|
|
// FIXME: This has a serious problem with code like this:
|
|
|
|
// void abs() {}
|
|
|
|
// ... __builtin_abs(x);
|
|
|
|
// The two versions of abs will collide. The fix is for the builtin to win,
|
|
|
|
// and for the existing one to be turned into a constantexpr cast of the
|
|
|
|
// builtin. In the case where the existing one is a static function, it
|
|
|
|
// should just be renamed.
|
2007-08-31 08:44:06 +04:00
|
|
|
if (llvm::Function *Existing = getModule().getFunction(Name)) {
|
|
|
|
if (Existing->getFunctionType() == Ty && Existing->hasExternalLinkage())
|
|
|
|
return FunctionSlot = Existing;
|
|
|
|
assert(Existing == 0 && "FIXME: Name collision");
|
|
|
|
}
|
2007-08-31 08:31:45 +04:00
|
|
|
|
|
|
|
// FIXME: param attributes for sext/zext etc.
|
2008-04-20 10:29:50 +04:00
|
|
|
return FunctionSlot =
|
|
|
|
llvm::Function::Create(Ty, llvm::Function::ExternalLinkage, Name,
|
|
|
|
&getModule());
|
2007-08-31 08:31:45 +04:00
|
|
|
}
|
|
|
|
|
2007-12-18 03:25:38 +03:00
|
|
|
llvm::Function *CodeGenModule::getIntrinsic(unsigned IID,const llvm::Type **Tys,
|
|
|
|
unsigned NumTys) {
|
|
|
|
return llvm::Intrinsic::getDeclaration(&getModule(),
|
|
|
|
(llvm::Intrinsic::ID)IID, Tys, NumTys);
|
|
|
|
}
|
2007-08-31 08:31:45 +04:00
|
|
|
|
2007-07-11 21:01:13 +04:00
|
|
|
llvm::Function *CodeGenModule::getMemCpyFn() {
|
|
|
|
if (MemCpyFn) return MemCpyFn;
|
|
|
|
llvm::Intrinsic::ID IID;
|
2008-03-08 11:34:58 +03:00
|
|
|
switch (Context.Target.getPointerWidth(0)) {
|
2007-07-11 21:01:13 +04:00
|
|
|
default: assert(0 && "Unknown ptr width");
|
|
|
|
case 32: IID = llvm::Intrinsic::memcpy_i32; break;
|
|
|
|
case 64: IID = llvm::Intrinsic::memcpy_i64; break;
|
|
|
|
}
|
2007-12-18 03:25:38 +03:00
|
|
|
return MemCpyFn = getIntrinsic(IID);
|
2007-07-11 21:01:13 +04:00
|
|
|
}
|
2007-08-21 04:21:21 +04:00
|
|
|
|
2008-02-20 01:01:01 +03:00
|
|
|
llvm::Function *CodeGenModule::getMemSetFn() {
|
|
|
|
if (MemSetFn) return MemSetFn;
|
|
|
|
llvm::Intrinsic::ID IID;
|
2008-03-08 11:34:58 +03:00
|
|
|
switch (Context.Target.getPointerWidth(0)) {
|
2008-02-20 01:01:01 +03:00
|
|
|
default: assert(0 && "Unknown ptr width");
|
|
|
|
case 32: IID = llvm::Intrinsic::memset_i32; break;
|
|
|
|
case 64: IID = llvm::Intrinsic::memset_i64; break;
|
|
|
|
}
|
|
|
|
return MemSetFn = getIntrinsic(IID);
|
|
|
|
}
|
2007-12-18 03:25:38 +03:00
|
|
|
|
2007-08-31 08:31:45 +04:00
|
|
|
llvm::Constant *CodeGenModule::
|
|
|
|
GetAddrOfConstantCFString(const std::string &str) {
|
2007-08-21 04:21:21 +04:00
|
|
|
llvm::StringMapEntry<llvm::Constant *> &Entry =
|
|
|
|
CFConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]);
|
|
|
|
|
|
|
|
if (Entry.getValue())
|
|
|
|
return Entry.getValue();
|
|
|
|
|
|
|
|
std::vector<llvm::Constant*> Fields;
|
|
|
|
|
|
|
|
if (!CFConstantStringClassRef) {
|
|
|
|
const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy);
|
|
|
|
Ty = llvm::ArrayType::get(Ty, 0);
|
|
|
|
|
|
|
|
CFConstantStringClassRef =
|
|
|
|
new llvm::GlobalVariable(Ty, false,
|
|
|
|
llvm::GlobalVariable::ExternalLinkage, 0,
|
|
|
|
"__CFConstantStringClassReference",
|
|
|
|
&getModule());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Class pointer.
|
|
|
|
llvm::Constant *Zero = llvm::Constant::getNullValue(llvm::Type::Int32Ty);
|
|
|
|
llvm::Constant *Zeros[] = { Zero, Zero };
|
|
|
|
llvm::Constant *C =
|
|
|
|
llvm::ConstantExpr::getGetElementPtr(CFConstantStringClassRef, Zeros, 2);
|
|
|
|
Fields.push_back(C);
|
|
|
|
|
|
|
|
// Flags.
|
|
|
|
const llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy);
|
|
|
|
Fields.push_back(llvm::ConstantInt::get(Ty, 1992));
|
|
|
|
|
|
|
|
// String pointer.
|
|
|
|
C = llvm::ConstantArray::get(str);
|
|
|
|
C = new llvm::GlobalVariable(C->getType(), true,
|
|
|
|
llvm::GlobalValue::InternalLinkage,
|
|
|
|
C, ".str", &getModule());
|
|
|
|
|
|
|
|
C = llvm::ConstantExpr::getGetElementPtr(C, Zeros, 2);
|
|
|
|
Fields.push_back(C);
|
|
|
|
|
|
|
|
// String length.
|
|
|
|
Ty = getTypes().ConvertType(getContext().LongTy);
|
|
|
|
Fields.push_back(llvm::ConstantInt::get(Ty, str.length()));
|
|
|
|
|
|
|
|
// The struct.
|
|
|
|
Ty = getTypes().ConvertType(getContext().getCFConstantStringType());
|
|
|
|
C = llvm::ConstantStruct::get(cast<llvm::StructType>(Ty), Fields);
|
2007-11-01 03:41:52 +03:00
|
|
|
llvm::GlobalVariable *GV =
|
|
|
|
new llvm::GlobalVariable(C->getType(), true,
|
|
|
|
llvm::GlobalVariable::InternalLinkage,
|
|
|
|
C, "", &getModule());
|
|
|
|
GV->setSection("__DATA,__cfstring");
|
|
|
|
Entry.setValue(GV);
|
|
|
|
return GV;
|
2007-08-21 04:21:21 +04:00
|
|
|
}
|
2007-11-28 08:34:05 +03:00
|
|
|
|
2008-02-11 03:02:17 +03:00
|
|
|
/// GenerateWritableString -- Creates storage for a string literal.
|
2007-11-28 08:34:05 +03:00
|
|
|
static llvm::Constant *GenerateStringLiteral(const std::string &str,
|
|
|
|
bool constant,
|
2007-12-02 10:19:18 +03:00
|
|
|
CodeGenModule &CGM) {
|
2007-11-28 08:34:05 +03:00
|
|
|
// Create Constant for this string literal
|
|
|
|
llvm::Constant *C=llvm::ConstantArray::get(str);
|
|
|
|
|
|
|
|
// Create a global variable for this string
|
|
|
|
C = new llvm::GlobalVariable(C->getType(), constant,
|
|
|
|
llvm::GlobalValue::InternalLinkage,
|
2007-12-02 10:19:18 +03:00
|
|
|
C, ".str", &CGM.getModule());
|
2007-11-28 08:34:05 +03:00
|
|
|
return C;
|
|
|
|
}
|
|
|
|
|
2008-02-11 03:02:17 +03:00
|
|
|
/// CodeGenModule::GetAddrOfConstantString -- returns a pointer to the character
|
|
|
|
/// array containing the literal. The result is pointer to array type.
|
2007-11-28 08:34:05 +03:00
|
|
|
llvm::Constant *CodeGenModule::GetAddrOfConstantString(const std::string &str) {
|
|
|
|
// Don't share any string literals if writable-strings is turned on.
|
|
|
|
if (Features.WritableStrings)
|
|
|
|
return GenerateStringLiteral(str, false, *this);
|
|
|
|
|
|
|
|
llvm::StringMapEntry<llvm::Constant *> &Entry =
|
|
|
|
ConstantStringMap.GetOrCreateValue(&str[0], &str[str.length()]);
|
|
|
|
|
|
|
|
if (Entry.getValue())
|
|
|
|
return Entry.getValue();
|
|
|
|
|
|
|
|
// Create a global variable for this.
|
|
|
|
llvm::Constant *C = GenerateStringLiteral(str, true, *this);
|
|
|
|
Entry.setValue(C);
|
|
|
|
return C;
|
|
|
|
}
|