[PATCH] D55484: ComputeLineNumbers: delete SSE2 vectorization

[Shi Yan via Phabricator via cfe-commits]

shi-yan added a comment.
Herald added a project: LLVM.

I'm hitting a crash by this code,

getting:

  exception thrown: RuntimeError: unreachable,RuntimeError: unreachable
      at ComputeLineNumbers(clang::DiagnosticsEngine&, clang::SrcMgr::ContentCache*, llvm::BumpPtrAllocatorImpl<llvm::MallocAllocator, 4096ul, 4096ul>&, clang::SourceManager const&, bool&) (wasm-function[21781]:719)
      at clang::SourceManager::getLineNumber(clang::FileID, unsigned int, bool*) const (wasm-function[21780]:187)
      at clang::SourceManager::getPresumedLoc(clang::SourceLocation, bool) const (wasm-function[21779]:733)
      at clang::Preprocessor::HandlePragmaSystemHeader(clang::Token&) (wasm-function[21284]:297)
      at (anonymous namespace)::PragmaSystemHeaderHandler::HandlePragma(clang::Preprocessor&, clang::PragmaIntroducer, clang::Token&) (wasm-function[21317]:5)
      at clang::PragmaNamespace::HandlePragma(clang::Preprocessor&, clang::PragmaIntroducer, clang::Token&) (wasm-function[21278]:565)
      at clang::PragmaNamespace::HandlePragma(clang::Preprocessor&, clang::PragmaIntroducer, clang::Token&) (wasm-function[21278]:565)
      at clang::Preprocessor::HandlePragmaDirective(clang::PragmaIntroducer) (wasm-function[21279]:142)
      at clang::Preprocessor::HandleDirective(clang::Token&) (wasm-function[21157]:1721)
      at clang::Lexer::LexTokenInternal(clang::Token&, bool) (wasm-function[20897]:14349)

The reason seems to be that the code appears to expect the Buf is zero ended, but it doesn't seem to be the case. The last character of the Buf was actually \n


Repository:
  rL LLVM

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  https://reviews.llvm.org/D55484/new/

https://reviews.llvm.org/D55484