eliminate code related to --no-ir-gen

src/IceCompiler.cpp

 //===- subzero/src/IceCompiler.cpp - Driver for bitcode translation -------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 29 matching lines @@
 
 namespace Ice {
 
 namespace {
 
 struct {
   const char *FlagName;
   int FlagValue;
 } ConditionalBuildAttributes[] = {
     {"dump", BuildDefs::dump()},
-    {"disable_ir_gen", BuildDefs::disableIrGen()},
     {"llvm_cl", BuildDefs::llvmCl()},
     {"llvm_ir", BuildDefs::llvmIr()},
     {"llvm_ir_as_input", BuildDefs::llvmIrAsInput()},
     {"minimal_build", BuildDefs::minimal()},
     {"browser_mode", BuildDefs::browser()}};
 
 // Validates values of build attributes. Prints them to Stream if Stream is
 // non-null.
 void validateAndGenerateBuildAttributes(Ostream *Stream) {
   // List the supported targets.
@@ skipping 27 matching lines @@
 
 } // end of anonymous namespace
 
 void Compiler::run(const Ice::ClFlagsExtra &ExtraFlags, GlobalContext &Ctx,
                    std::unique_ptr<llvm::DataStreamer> &&InputStream) {
   validateAndGenerateBuildAttributes(
       ExtraFlags.getGenerateBuildAtts() ? &Ctx.getStrDump() : nullptr);
   if (ExtraFlags.getGenerateBuildAtts())
     return Ctx.getErrorStatus()->assign(EC_None);
 
-  if (!BuildDefs::disableIrGen() && Ctx.getFlags().getDisableIRGeneration()) {
-    Ctx.getStrError() << "Error: Build doesn't allow --no-ir-gen when not "
-                      << "ALLOW_DISABLE_IR_GEN!\n";
-    return Ctx.getErrorStatus()->assign(EC_Args);
-  }
-
   // The Minimal build (specifically, when dump()/emit() are not implemented)
   // allows only --filetype=obj. Check here to avoid cryptic error messages
   // downstream.
   if (!BuildDefs::dump() && Ctx.getFlags().getOutFileType() != FT_Elf) {
     // TODO(stichnot): Access the actual command-line argument via
     // llvm::Option.ArgStr and .ValueStr .
     Ctx.getStrError()
         << "Error: only --filetype=obj is supported in this build.\n";
     return Ctx.getErrorStatus()->assign(EC_Args);
   }
@@ skipping 70 matching lines @@
 
   if (Ctx.getFlags().getTimeEachFunction()) {
     constexpr bool DumpCumulative = false;
     Ctx.dumpTimers(GlobalContext::TSK_Funcs, DumpCumulative);
   }
   constexpr bool FinalStats = true;
   Ctx.dumpStats("_FINAL_", FinalStats);
 }
 
 } // end of namespace Ice