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//===--- 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.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);
}
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