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#include "compiler.h"
#include <clang/CodeGen/CodeGenAction.h>
#include <clang/Driver/Compilation.h>
#include <clang/Driver/Driver.h>
#include <clang/Driver/Tool.h>
#include <clang/Frontend/CompilerInvocation.h>
#include <clang/Frontend/CompilerInstance.h>
#include <clang/Frontend/DiagnosticOptions.h>
#include <clang/Frontend/FrontendDiagnostic.h>
#include <clang/Frontend/TextDiagnosticPrinter.h>
#include <llvm/LLVMContext.h>
#include <llvm/Module.h>
#include <llvm/Config/config.h>
#include <llvm/ADT/OwningPtr.h>
#include <llvm/ADT/SmallString.h>
#include <llvm/Config/config.h>
#include <llvm/ExecutionEngine/ExecutionEngine.h>
#include <llvm/Support/ManagedStatic.h>
#include <llvm/Support/raw_ostream.h>
#include <llvm/System/Host.h>
#include <llvm/System/Path.h>
#include <llvm/Target/TargetSelect.h>
using namespace Coal;
using namespace clang;
Compiler::Compiler()
{
init();
}
Compiler::~Compiler()
{
}
bool Compiler::init()
{
llvm::sys::Path Path = llvm::sys::Path::GetCurrentDirectory();
clang::TextDiagnosticPrinter *DiagClient =
new TextDiagnosticPrinter(llvm::errs(), DiagnosticOptions());
clang::Diagnostic Diags(DiagClient);
clang::driver::Driver TheDriver(Path.str(), llvm::sys::getHostTriple(),
"a.out", /*IsProduction=*/false, /*CXXIsProduction=*/false,
Diags);
TheDriver.setTitle("clang interpreter");
// FIXME: This is a hack to try to force the driver to do something we can
// recognize. We need to extend the driver library to support this use model
// (basically, exactly one input, and the operation mode is hard wired).
llvm::SmallVector<const char *, 16> Args;
Args.push_back("-fsyntax-only");
llvm::OwningPtr<clang::driver::Compilation> C(TheDriver.BuildCompilation(Args.size(),
Args.data()));
if (!C)
return false;
// FIXME: This is copied from ASTUnit.cpp; simplify and eliminate.
// We expect to get back exactly one command job, if we didn't something
// failed. Extract that job from the compilation.
const driver::JobList &Jobs = C->getJobs();
if (Jobs.size() != 1 || !isa<driver::Command>(Jobs.begin())) {
llvm::SmallString<256> Msg;
llvm::raw_svector_ostream OS(Msg);
C->PrintJob(OS, C->getJobs(), "; ", true);
Diags.Report(diag::err_fe_expected_compiler_job) << OS.str();
return false;
}
const driver::Command *Cmd = cast<driver::Command>(*Jobs.begin());
if (llvm::StringRef(Cmd->getCreator().getName()) != "clang") {
Diags.Report(diag::err_fe_expected_clang_command);
return false;
}
// Initialize a compiler invocation object from the clang (-cc1) arguments.
const driver::ArgStringList &CCArgs = Cmd->getArguments();
llvm::OwningPtr<CompilerInvocation> CI(new CompilerInvocation);
CompilerInvocation::CreateFromArgs(*CI,
const_cast<const char **>(CCArgs.data()),
const_cast<const char **>(CCArgs.data()) +
CCArgs.size(),
Diags);
// Show the invocation, with -v.
if (CI->getHeaderSearchOpts().Verbose) {
llvm::errs() << "clang invocation:\n";
C->PrintJob(llvm::errs(), C->getJobs(), "\n", true);
llvm::errs() << "\n";
}
// FIXME: This is copied from cc1_main.cpp; simplify and eliminate.
// Create a compiler instance to handle the actual work.
m_clang.setLLVMContext(new llvm::LLVMContext);
m_clang.setInvocation(CI.take());
// Create the compilers actual diagnostics engine.
m_clang.createDiagnostics(int(CCArgs.size()),const_cast<char**>(
CCArgs.data()));
if (!m_clang.hasDiagnostics())
return false;
// Infer the builtin include path if unspecified.
if (m_clang.getHeaderSearchOpts().UseBuiltinIncludes &&
m_clang.getHeaderSearchOpts().ResourceDir.empty()) {
assert(0);
//m_clang.getHeaderSearchOpts().ResourceDir =
// CompilerInvocation::GetResourcesPath(argv[0], MainAddr);
}
return true;
}
llvm::Module * Compiler::compile(const std::string &text)
{
// Create and execute the frontend to generate an LLVM bitcode module.
llvm::OwningPtr<CodeGenAction> act(new EmitLLVMOnlyAction());
if (!m_clang.ExecuteAction(*act))
return 0;
return act->takeModule();
}
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