[llvm-bugs] [Bug 35290] New: Unresolved external symbol in X86 inline asm after r314493/r314494

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=35290

            Bug ID: 35290
           Summary: Unresolved external symbol in X86 inline asm after
                    r314493/r314494
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: dmajor at mozilla.com
                CC: coby.tayree at intel.com, llvm-bugs at lists.llvm.org,
                    rnk at google.com

I bisected this to r314493/r314494:

$ cat yuv_row_table.cpp
extern const int kCoefficientsRgbY[1];
const int kCoefficientsRgbY[1] = {0};
int main() { return 0; }

$ cat yuv_row_win.cpp
extern const int kCoefficientsRgbY[1];
void FastConvertYUVToRGB32Row_SSE() {
  __asm {
    movq      mm1, [kCoefficientsRgbY + 8 * eax]
  }
}

$ clang-cl.exe -m32 yuv_row_table.cpp yuv_row_win.cpp
yuv_row_win-f72966.obj : error LNK2019: unresolved external symbol
kCoefficientsRgbY referenced in function "void __cdecl
FastConvertYUVToRGB32Row_SSE(void)" (?FastConvertYUVToRGB32Row_SSE@@YAXXZ)
yuv_row_table.exe : fatal error LNK1120: 1 unresolved externals

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