[llvm-bugs] [Bug 39086] New: [AMDGPU][MC] Need flag to designate instructions that only have extended encoding

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=39086

            Bug ID: 39086
           Summary: [AMDGPU][MC] Need flag to designate instructions that
                    only have extended encoding
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: Alexander.Timofeev at amd.com
                CC: llvm-bugs at lists.llvm.org

Normally mnemonics of the short and extended encoding differ by the suffix -
"_e32" and "_e64" respectively.
Some of VOP2/VOP3 instructions only have extended encoding.
In current implementation AMDGPUInstrPrinter appends "_e64" suffix to the
mnemonic if instruction description has SIInstrFlags::VOP3 flag set.
So we have a bunch of hacks around to suppress printing the "_e64" suffix for
the instructions that only have extended from.

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