[llvm-bugs] [Bug 28452] New: Regression(likely r274678): "unsupported relocation type" UNREACHABLE while building chromium on Windows

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=28452

            Bug ID: 28452
           Summary: Regression(likely r274678): "unsupported relocation
                    type" UNREACHABLE while building chromium on Windows
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: nicolasweber at gmx.de
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

We're seeing this on our bots:

FAILED: obj/ppapi/ppapi_gles2_lib/gl2ext_ppapi.obj 
../../third_party/llvm-build/Release+Asserts/bin/clang-cl.exe /nologo
/showIncludes /FC @obj/ppapi/ppapi_gles2_lib/gl2ext_ppapi.obj.rsp /c
../../ppapi/lib/gl/gles2/gl2ext_ppapi.c
/Foobj/ppapi/ppapi_gles2_lib/gl2ext_ppapi.obj
/Fd"obj/ppapi/ppapi_gles2_lib_c.pdb"
unsupported relocation type
UNREACHABLE executed at
C:\b\c\b\ClangToTWin64\src\third_party\llvm\lib\Target\X86\MCTargetDesc\X86WinCOFFObjectWriter.cpp:73!
Wrote crash dump file
"C:\Users\CHROME~1\AppData\Local\Temp\clang-cl.exe-c8a82e.dmp"


Regression range is 274664:274696, and r274678 looks pretty related.

Upstream bug: https://bugs.chromium.org/p/chromium/issues/detail?id=626336

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