[llvm-bugs] [Bug 42889] New: Sanitizer + -O3 stalls in LLVM backend

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=42889

            Bug ID: 42889
           Summary: Sanitizer + -O3 stalls in LLVM backend
           Product: clang
           Version: 8.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: LLVM Codegen
          Assignee: unassignedclangbugs at nondot.org
          Reporter: dominik.strasser at onespin.com
                CC: llvm-bugs at lists.llvm.org, neeilans at live.com,
                    richard-llvm at metafoo.co.uk

Created attachment 22339
  --> https://bugs.llvm.org/attachment.cgi?id=22339&action=edit
Source code stalling the compiler

compiling the attached source (admittedly large, it is a bison output) runs for
hours in the backend.

Looking at the clang backtrace suggests that
llvm::RegAllocBase::allocatePhysRegs
could be the problematic code area.

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