[llvm-bugs] [Bug 26485] New: [REGRESSION] UNREACHABLE executed at lib/CodeGen/RegAllocFast.cpp:361!

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=26485

            Bug ID: 26485
           Summary: [REGRESSION] UNREACHABLE executed at
                    lib/CodeGen/RegAllocFast.cpp:361!
           Product: libraries
           Version: 3.8
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Register Allocator
          Assignee: unassignedbugs at nondot.org
          Reporter: compnerd at compnerd.org
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 15829
  --> https://llvm.org/bugs/attachment.cgi?id=15829&action=edit
reduced.c

This is a regression lowering TLS access in C on Darwin, currently on 3.8 and
3.9 (master).  The attached lit-style test case reproduces the fast reg alloc
failure.  Note that this only occurs at -O0 as the problem is only exhibited
for the fast register allocator.

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