[llvm] [TargetLowering][COFF] Allow GlobalAlias in lowerRelativeReference (PR #220674)

[via llvm-commits]

ronlieb wrote:

@andysjlim  seeing a downstream build failure on pyTorch on windows after this commit landed.
might take a few days to get a reproducer.  Mentioning now for awareness.

[2071/7188] Building CXX object c10/hip/CMakeFiles/c10_hip.dir/HIPException.cpp.obj
FAILED: c10/hip/CMakeFiles/c10_hip.dir/HIPException.cpp.obj
... clang-cl.exe ... -c -- B:\src\pytorch\c10\hip\HIPException.cpp
error: symbol '__ImageBase' can not be undefined in a subtraction expression
error: symbol '__ImageBase' can not be undefined in a subtraction expression
error: symbol '__ImageBase' can not be undefined in a subtraction expression
3 errors generated.


https://github.com/llvm/llvm-project/pull/220674