[llvm-bugs] [Bug 30746] New: Compilation of large string map with asan and debug symbols never finishes

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=30746

            Bug ID: 30746
           Summary: Compilation of large string map with asan and debug
                    symbols never finishes
           Product: libraries
           Version: 3.8
          Hardware: Macintosh
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Common Code Generator Code
          Assignee: unassignedbugs at nondot.org
          Reporter: efidler at topologyinc.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 17463
  --> https://llvm.org/bugs/attachment.cgi?id=17463&action=edit
test C++ file

I have a "static std::map<std::string, std::string>" with a few hundred
entries.

With Clang 3.7, a regular debug build takes 2.42s and an ASAN debug build takes
24.72s. With Clang 3.8, a regular debug build takes 2.53s and an ASAN debug
build never finishes (I gave up after waiting a few hours).

I'm testing on macOS sierra with llvm installed from homebrew, if that matters.

The closest bug I found was https://llvm.org/bugs/show_bug.cgi?id=26055 but I
don't know enough about LLVM internals to know if that's really related.

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