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