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Diffstat (limited to 'CodeGen/CodeGenFunction.cpp')
| -rw-r--r-- | CodeGen/CodeGenFunction.cpp | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/CodeGen/CodeGenFunction.cpp b/CodeGen/CodeGenFunction.cpp deleted file mode 100644 index 49f23f27c3..0000000000 --- a/CodeGen/CodeGenFunction.cpp +++ /dev/null @@ -1,182 +0,0 @@ -//===--- CodeGenFunction.cpp - Emit LLVM Code from ASTs for a Function ----===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This coordinates the per-function state used while generating code. -// -//===----------------------------------------------------------------------===// - -#include "CodeGenFunction.h" -#include "CodeGenModule.h" -#include "clang/Basic/TargetInfo.h" -#include "clang/AST/AST.h" -#include "llvm/CallingConv.h" -#include "llvm/Constants.h" -#include "llvm/DerivedTypes.h" -#include "llvm/Function.h" -#include "llvm/Analysis/Verifier.h" -#include "llvm/Support/CFG.h" -using namespace clang; -using namespace CodeGen; - -CodeGenFunction::CodeGenFunction(CodeGenModule &cgm) - : CGM(cgm), Target(CGM.getContext().Target), SwitchInsn(NULL), - CaseRangeBlock(NULL) {} - -ASTContext &CodeGenFunction::getContext() const { - return CGM.getContext(); -} - - -llvm::BasicBlock *CodeGenFunction::getBasicBlockForLabel(const LabelStmt *S) { - llvm::BasicBlock *&BB = LabelMap[S]; - if (BB) return BB; - - // Create, but don't insert, the new block. - return BB = new llvm::BasicBlock(S->getName()); -} - -llvm::Constant * -CodeGenFunction::GetAddrOfStaticLocalVar(const BlockVarDecl *BVD) { - return cast<llvm::Constant>(LocalDeclMap[BVD]); -} - -const llvm::Type *CodeGenFunction::ConvertType(QualType T) { - return CGM.getTypes().ConvertType(T); -} - -bool CodeGenFunction::hasAggregateLLVMType(QualType T) { - return !T->isRealType() && !T->isPointerType() && !T->isReferenceType() && - !T->isVoidType() && !T->isVectorType() && !T->isFunctionType(); -} - - -void CodeGenFunction::GenerateCode(const FunctionDecl *FD) { - LLVMIntTy = ConvertType(getContext().IntTy); - LLVMPointerWidth = static_cast<unsigned>( - getContext().getTypeSize(getContext().getPointerType(getContext().VoidTy))); - - CurFuncDecl = FD; - CurFn = cast<llvm::Function>(CGM.GetAddrOfFunctionDecl(FD, true)); - assert(CurFn->isDeclaration() && "Function already has body?"); - - // TODO: Set up linkage and many other things. Note, this is a simple - // approximation of what we really want. - if (FD->getAttr<DLLImportAttr>()) - CurFn->setLinkage(llvm::Function::DLLImportLinkage); - else if (FD->getAttr<DLLExportAttr>()) - CurFn->setLinkage(llvm::Function::DLLExportLinkage); - else if (FD->getAttr<WeakAttr>() || FD->isInline()) - CurFn->setLinkage(llvm::Function::WeakLinkage); - else if (FD->getStorageClass() == FunctionDecl::Static) - CurFn->setLinkage(llvm::Function::InternalLinkage); - - if (FD->getAttr<FastCallAttr>()) - CurFn->setCallingConv(llvm::CallingConv::Fast); - - if (const VisibilityAttr *attr = FD->getAttr<VisibilityAttr>()) - CurFn->setVisibility(attr->getVisibility()); - // FIXME: else handle -fvisibility - - - unsigned FuncAttrs = 0; - if (FD->getAttr<NoThrowAttr>()) - FuncAttrs |= llvm::ParamAttr::NoUnwind; - if (FD->getAttr<NoReturnAttr>()) - FuncAttrs |= llvm::ParamAttr::NoReturn; - - if (FuncAttrs) { - llvm::ParamAttrsWithIndex PAWI = - llvm::ParamAttrsWithIndex::get(0, FuncAttrs); - CurFn->setParamAttrs(llvm::PAListPtr::get(&PAWI, 1)); - } - - llvm::BasicBlock *EntryBB = new llvm::BasicBlock("entry", CurFn); - - // Create a marker to make it easy to insert allocas into the entryblock - // later. Don't create this with the builder, because we don't want it - // folded. - llvm::Value *Undef = llvm::UndefValue::get(llvm::Type::Int32Ty); - AllocaInsertPt = new llvm::BitCastInst(Undef, llvm::Type::Int32Ty, "allocapt", - EntryBB); - - Builder.SetInsertPoint(EntryBB); - - // Emit allocs for param decls. Give the LLVM Argument nodes names. - llvm::Function::arg_iterator AI = CurFn->arg_begin(); - - // Name the struct return argument. - if (hasAggregateLLVMType(FD->getResultType())) { - AI->setName("agg.result"); - ++AI; - } - - for (unsigned i = 0, e = FD->getNumParams(); i != e; ++i, ++AI) { - assert(AI != CurFn->arg_end() && "Argument mismatch!"); - EmitParmDecl(*FD->getParamDecl(i), AI); - } - - // Emit the function body. - EmitStmt(FD->getBody()); - - // Emit a return for code that falls off the end. If insert point - // is a dummy block with no predecessors then remove the block itself. - llvm::BasicBlock *BB = Builder.GetInsertBlock(); - if (isDummyBlock(BB)) - BB->eraseFromParent(); - else { - // FIXME: if this is C++ main, this should return 0. - if (CurFn->getReturnType() == llvm::Type::VoidTy) - Builder.CreateRetVoid(); - else - Builder.CreateRet(llvm::UndefValue::get(CurFn->getReturnType())); - } - assert(BreakContinueStack.empty() && - "mismatched push/pop in break/continue stack!"); - - // Remove the AllocaInsertPt instruction, which is just a convenience for us. - AllocaInsertPt->eraseFromParent(); - AllocaInsertPt = 0; - - // Verify that the function is well formed. - assert(!verifyFunction(*CurFn)); -} - -/// isDummyBlock - Return true if BB is an empty basic block -/// with no predecessors. -bool CodeGenFunction::isDummyBlock(const llvm::BasicBlock *BB) { - if (BB->empty() && pred_begin(BB) == pred_end(BB)) - return true; - return false; -} - -/// StartBlock - Start new block named N. If insert block is a dummy block -/// then reuse it. -void CodeGenFunction::StartBlock(const char *N) { - llvm::BasicBlock *BB = Builder.GetInsertBlock(); - if (!isDummyBlock(BB)) - EmitBlock(new llvm::BasicBlock(N)); - else - BB->setName(N); -} - -/// getCGRecordLayout - Return record layout info. -const CGRecordLayout *CodeGenFunction::getCGRecordLayout(CodeGenTypes &CGT, - QualType Ty) { - const RecordType *RTy = Ty->getAsRecordType(); - assert (RTy && "Unexpected type. RecordType expected here."); - - return CGT.getCGRecordLayout(RTy->getDecl()); -} - -/// WarnUnsupported - Print out a warning that codegen doesn't support the -/// specified stmt yet. -void CodeGenFunction::WarnUnsupported(const Stmt *S, const char *Type) { - CGM.WarnUnsupported(S, Type); -} - |