Force sequential parsing when threads=0.

src/PNaClTranslator.cpp

 //===- subzero/src/PNaClTranslator.cpp - ICE from bitcode -----------------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 2977 matching lines @@
 /// Parses the module block in the bitcode file.
 class ModuleParser final : public BlockParserBaseClass {
   ModuleParser() = delete;
   ModuleParser(const ModuleParser &) = delete;
   ModuleParser &operator=(const ModuleParser &) = delete;
 
 public:
   ModuleParser(unsigned BlockID, TopLevelParser *Context)
       : BlockParserBaseClass(BlockID, Context),
         Timer(Ice::TimerStack::TT_parseModule,
-              Context->getTranslator().getContext()) {}
+              Context->getTranslator().getContext()),
+        IsParseParallel(Ice::GlobalContext::Flags.isParseParallel()) {}
   ~ModuleParser() override = default;
   const char *getBlockName() const override { return "module"; }
   NaClBitstreamCursor &getCursor() const { return Record.GetCursor(); }
 
 private:
   Ice::TimerMarker Timer;
   // True if we have already installed names for unnamed global declarations,
   // and have generated global constant initializers.
   bool GlobalDeclarationNamesAndInitializersInstalled = false;
   // True if we have already processed the symbol table for the module.
   bool FoundValuesymtab = false;
+  const bool IsParseParallel;
 
   // Generates names for unnamed global addresses (i.e. functions and global
   // variables). Then lowers global variable declaration initializers to the
   // target. May be called multiple times. Only the first call will do the
   // installation.
   void installGlobalNamesAndGlobalVarInitializers() {
     if (!GlobalDeclarationNamesAndInitializersInstalled) {
       Context->installGlobalNames();
       Context->createValueIDs();
       Context->verifyFunctionTypeSignatures();
@@ skipping 121 matching lines @@
 
     FoundValuesymtab = true;
     ModuleValuesymtabParser Parser(BlockID, this);
     return Parser.ParseThisBlock();
   }
   case naclbitc::FUNCTION_BLOCK_ID: {
     installGlobalNamesAndGlobalVarInitializers();
     Ice::GlobalContext *Ctx = Context->getTranslator().getContext();
     uint32_t SeqNumber = Context->getTranslator().getNextSequenceNumber();
     NaClBcIndexSize_t FcnId = Context->getNextFunctionBlockValueID();
-    if (Ctx->getFlags().getParseParallel()) {
+    if (IsParseParallel) {
       // Skip the block and copy into a buffer. Note: We copy into a buffer
       // using the top-level parser to make sure that the underlying
       // buffer reading from the data streamer is not thread safe.
       NaClBitstreamCursor &Cursor = Record.GetCursor();
       uint64_t StartBit = Cursor.GetCurrentBitNo();
       if (SkipBlock())
         return true;
       const uint64_t EndBit = Cursor.GetCurrentBitNo();
       const uintptr_t StartByte = Cursor.getStartWordByteForBit(StartBit);
       const uintptr_t EndByte = Cursor.getEndWordByteForBit(EndBit);
@@ skipping 134 matching lines @@
     raw_string_ostream StrBuf(Buffer);
     StrBuf << IRFilename << ": Does not contain a module!";
     llvm::report_fatal_error(StrBuf.str());
   }
   if (InputStreamFile.getBitcodeBytes().getExtent() % 4 != 0) {
     llvm::report_fatal_error("Bitcode stream should be a multiple of 4 bytes");
   }
 }
 
 } // end of namespace Ice