| //===--- LLVMCodegen.cpp - Emit LLVM Code from ASTs -----------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file was developed by Chris Lattner and is distributed under |
| // the University of Illinois Open Source License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This builds an AST and converts it to LLVM Code. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang.h" |
| #include "clang/CodeGen/ModuleBuilder.h" |
| #include "clang/Sema/ASTStreamer.h" |
| #include "clang/AST/AST.h" |
| #include "clang/Lex/Preprocessor.h" |
| #include "clang/Basic/Diagnostic.h" |
| #include "llvm/Module.h" |
| #include <iostream> |
| using namespace clang; |
| |
| //===----------------------------------------------------------------------===// |
| // LLVM Emission |
| //===----------------------------------------------------------------------===// |
| |
| void clang::EmitLLVMFromASTs(Preprocessor &PP, unsigned MainFileID, |
| bool PrintStats) { |
| Diagnostic &Diags = PP.getDiagnostics(); |
| // Create the streamer to read the file. |
| ASTContext Context(PP.getSourceManager(), PP.getTargetInfo(), |
| PP.getIdentifierTable()); |
| ASTStreamerTy *Streamer = ASTStreamer_Init(PP, Context, MainFileID); |
| |
| // Create the module to codegen into. |
| llvm::Module M("foo"); |
| |
| CodeGen::BuilderTy *Builder = CodeGen::Init(Context, M); |
| |
| while (Decl *D = ASTStreamer_ReadTopLevelDecl(Streamer)) { |
| // If an error occurred, stop code generation, but continue parsing and |
| // semantic analysis (to ensure all warnings and errors are emitted). |
| if (Diags.hasErrorOccurred()) |
| continue; |
| |
| if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { |
| CodeGen::CodeGenFunction(Builder, FD); |
| } else if (FileVarDecl *FVD = dyn_cast<FileVarDecl>(D)) { |
| CodeGen::CodeGenGlobalVar(Builder, FVD); |
| } else { |
| assert(isa<TypedefDecl>(D) && "Only expected typedefs here"); |
| // don't codegen for now, eventually pass down for debug info. |
| //std::cerr << "Read top-level typedef decl: '" << D->getName() << "'\n"; |
| } |
| } |
| |
| if (PrintStats) { |
| std::cerr << "\nSTATISTICS:\n"; |
| CodeGen::PrintStats(Builder); |
| ASTStreamer_PrintStats(Streamer); |
| Context.PrintStats(); |
| } |
| |
| CodeGen::Terminate(Builder); |
| ASTStreamer_Terminate(Streamer); |
| |
| // Print the generated code. |
| M.print(std::cout); |
| } |
| |