[cfe-dev] llvm assertion error

[Anton Smirnov]

I'm trying to use LLVM/Clang API to compile the source code to LLVM IR.

clang_ir.cpp:

    #include <iostream>

    #include <clang/Driver/Compilation.h>
    #include <clang/Driver/Driver.h>
    #include <clang/Frontend/TextDiagnosticPrinter.h>
    #include <llvm/Support/Host.h>
    #include <llvm/Support/Program.h>
    #include <llvm/Support/raw_ostream.h>

    using namespace std;
    using namespace clang;
    using namespace clang::driver;

    int main(int argc, char** argv)
    {
        cout << "Starting ----" << std::endl;

    // [clang -S -emit-llvm ./test/hello_world.cpp]

        // Arguments to pass to the clang driver:
    //    clang getinmemory.c -lcurl -v
    // Path to the C file
    string clangPath = "clang";

    string inputPath = "./test/hello_world.cpp";
    string outputPath = "hello_world.ll";

    vector<const char *> args;
    args.push_back(clangPath.c_str());
    args.push_back("-S");
    args.push_back("-emit-llvm");
    args.push_back(inputPath.c_str());

    // The clang driver needs a DiagnosticsEngine so it can report problems
    clang::DiagnosticOptions *Options = new clang::DiagnosticOptions();
    //clang::TextDiagnosticPrinter *DiagClient = new
clang::TextDiagnosticPrinter(llvm::errs(), Options);
    clang::IntrusiveRefCntPtr<clang::DiagnosticIDs> DiagID(new
clang::DiagnosticIDs());
    clang::DiagnosticsEngine Diags(DiagID, Options);

    cout << "making driver" << endl;

    // Create the clang driver
    clang::driver::Driver TheDriver(args[0],
llvm::sys::getDefaultTargetTriple(), outputPath, Diags);

    // C++ code
    //TheDriver.CCCIsCXX = true;

    cout << "making compilation" << endl;

    // Create the set of actions to perform
    clang::OwningPtr<clang::driver::Compilation>
Compilation(TheDriver.BuildCompilation(args));

    cout << "printing actions:" << endl;

    // Print the set of actions
    TheDriver.PrintActions(*Compilation);

        std::cout << "Done ----" << std::endl;

        // Carry out the actions
    int Res = 0;
    SmallVector<std::pair<int, const Command *>, 4> FailingCommands;
      if (Compilation)
    Res = TheDriver.ExecuteCompilation(*Compilation, FailingCommands);

    // Report problems
    /*
    if (Res < 0)
    TheDriver.generateCompilationDiagnostics(*Compilation, FailingCommands);
    */
    for (SmallVectorImpl< std::pair<int,
    const Command *> >::iterator it = FailingCommands.begin(),
    ie = FailingCommands.end(); it != ie; ++it) {
        int CommandRes = it->first;
        const Command *FailingCommand = it->second;
        if (!Res)
          Res = CommandRes;

        // If result status is < 0, then the driver command signalled an
error.
        // If result status is 70, then the driver command reported a fatal
error.
        // In these cases, generate additional diagnostic information if
possible.
        if (CommandRes < 0 || CommandRes == 70) {
          TheDriver.generateCompilationDiagnostics(*Compilation,
FailingCommand);
          break;
        }
      }

        return Res;
    }

successfully built with command-line:

    MBA-Anton:build asmirnov$ clang++ `llvm-config --cxxflags` `llvm-config
--ldflags` `llvm-config --libs all` -lclang -lclangAST -lclangASTMatchers
-lclangAnalysis -lclangApplyReplacements -lclangBasic -lclangCodeGen
-lclangDriver -lclangDynamicASTMatchers -lclangEdit -lclangFormat
-lclangFrontend -lclangFrontendTool -lclangIndex -lclangLex -lclangParse
-lclangQuery -lclangRewriteCore -lclangRewriteFrontend -lclangSema
-lclangSerialization -lclangStaticAnalyzerCheckers
-lclangStaticAnalyzerCore -lclangStaticAnalyzerFrontend -lclangTidy
-lclangTidyLLVMModule -lclangTooling ../clang_ir.cpp -o clang_ir
    MBA-Anton:build asmirnov$

while running i'm getting assertion error:

    MBA-Anton:build asmirnov$ ./clang_ir
    Starting ----
    making driver
    making compilation
    Assertion failed: (getClient() && "DiagnosticClient not set!"),
function EmitCurrentDiagnostic, file
/Users/asmirnov/Documents/dev/src/llvm_34/tools/clang/lib/Basic/Diagnostic.cpp,
line 391.
    Abort trap: 6
    MBA-Anton:build asmirnov$
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