Subzero: Fix -build-atts option.

src/IceCompileServer.cpp

 //===- subzero/src/IceCompileServer.cpp - Compile server ------------------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 109 matching lines @@
   (void)Written; // If something went wrong, we deliberately just give up.
 
   // If we reached here, we are failing ungracefully. Run the interrupt handlers
   // to make sure any special cleanups get done, in particular that we remove
   // files registered with RemoveFileOnSignal.
   llvm::sys::RunInterruptHandlers();
 
   exit(0);
 }
 
+struct {
+  const char *FlagName;
+  bool FlagValue;
+} ConditionalBuildAttributes[] = {
+    {"dump", BuildDefs::dump()},
+    {"llvm_cl", BuildDefs::llvmCl()},
+    {"llvm_ir", BuildDefs::llvmIr()},
+    {"llvm_ir_as_input", BuildDefs::llvmIrAsInput()},
+    {"minimal_build", BuildDefs::minimal()},
+    {"browser_mode", BuildDefs::browser()}};
+
+/// Dumps values of build attributes to Stream if Stream is non-null.
+void dumpBuildAttributes(Ostream &Str) {
+// List the supported targets.
+#define SUBZERO_TARGET(TARGET) Str << "target_" #TARGET << "\n";
+#include "llvm/Config/SZTargets.def"
+  const char *Prefix[2] = {"no", "allow"};
+  for (size_t i = 0; i < llvm::array_lengthof(ConditionalBuildAttributes);
+       ++i) {
+    const auto &A = ConditionalBuildAttributes[i];
+    Str << Prefix[A.FlagValue] << "_" << A.FlagName << "\n";
+  }
+}
+
 } // end of anonymous namespace
 
 void CLCompileServer::run() {
   if (BuildDefs::dump()) {
     llvm::sys::PrintStackTraceOnErrorSignal();
   }
   ClFlags::parseFlags(argc, argv);
   ClFlags Flags;
   ClFlagsExtra ExtraFlags;
   ClFlags::getParsedClFlags(Flags);
@@ skipping 51 matching lines @@
       (!BuildDefs::minimal() && ExtraFlags.getBitcodeAsText())
           ? TextDataStreamer::create(ExtraFlags.getIRFilename(), &StrError)
           : llvm::getDataFileStreamer(ExtraFlags.getIRFilename(), &StrError));
   if (!StrError.empty() || !InputStream) {
     llvm::SMDiagnostic Err(ExtraFlags.getIRFilename(),
                            llvm::SourceMgr::DK_Error, StrError);
     Err.print(ExtraFlags.getAppName().c_str(), *Ls);
     return transferErrorCode(getReturnValue(ExtraFlags, Ice::EC_Bitcode));
   }
 
+  if (ExtraFlags.getGenerateBuildAtts()) {
+    dumpBuildAttributes(*Os.get());
+    return transferErrorCode(getReturnValue(ExtraFlags, Ice::EC_None));
+  }
+
   Ctx.reset(
       new GlobalContext(Ls.get(), Os.get(), Ls.get(), ELFStr.get(), Flags));
   if (Ctx->getFlags().getNumTranslationThreads() != 0) {
     std::thread CompileThread([this, &ExtraFlags, &InputStream]() {
       Ctx->initParserThread();
       getCompiler().run(ExtraFlags, *Ctx.get(), std::move(InputStream));
     });
     CompileThread.join();
   } else {
     getCompiler().run(ExtraFlags, *Ctx.get(), std::move(InputStream));
   }
   transferErrorCode(getReturnValue(
       ExtraFlags, static_cast<ErrorCodes>(Ctx->getErrorStatus()->value())));
 }
 
 } // end of namespace Ice