fzou1 wrote:

> > > > Suppress EGPR/NDD instructions for relocations to avoid APX relocation 
> > > > types emitted. This is to keep backward compatibility with old version 
> > > > of ld and other linkers without APX support. If there are APX 
> > > > relocation types, old version of linkers would raise "unsupported 
> > > > relocation type" error. Example:
> > > > ```
> > > > $ llvm-mc -filetype=obj -o got.o -triple=x86_64-unknown-linux got.s
> > > > $ ld got.o -o got.exe
> > > > ld: got.o: unsupported relocation type 0x2b
> > > > ...
> > > > 
> > > > $ cat got.s
> > > > ...
> > > > movq foo@GOTPCREL(%rip), %r16
> > > > 
> > > > $ llvm-objdump -dr got.o
> > > > ...
> > > > 1: d5 48 8b 05 00 00 00 00       movq    (%rip), %r16
> > > > 0000000000000005:  R_X86_64_CODE_4_GOTPCRELX    foo-0x4
> > > > ```
> > > 
> > > 
> > > Could you add who is the user for such request: LLVM + APX + old BFD 
> > > linker? The code looks like a dirty workaround. I expect a real user.
> > 
> > 
> > Agree. But without this, users cannot try APX features with LLVM + old 
> > builtin linker on RHEL9 OS which is expected to be EOL in 2032.
> 
> Okay, can you add this info into description of this PR?

Updated. Thanks.

https://github.com/llvm/llvm-project/pull/136660
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