[llvm-bugs] [Bug 28200] New: [mc] Some F64 insns (v_add_f64 etc.) -- floating inline const lead to assert.

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=28200

            Bug ID: 28200
           Summary: [mc] Some F64 insns (v_add_f64 etc.) -- floating
                    inline const lead to assert.
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: AMDGPU
          Assignee: artem.tamazov at amd.com
          Reporter: artem.tamazov at amd.com
                CC: llvm-bugs at lists.llvm.org, nikolay.haustov at amd.com
    Classification: Unclassified

Created attachment 16581
  --> https://llvm.org/bugs/attachment.cgi?id=16581&action=edit
00204.tests_tg_gfx7_asm_lit1_bug.06.08.min.v_add_etc_f64-fconst_assert.zip

Example of failing instruction:
> v_add_f64 v[0:1], 0.5, 0
> ...
> Encoding of this operand type is not supported yet.
> UNREACHABLE executed at C:\work-1\asm-git-1\llvm\lib\Target\AMDGPU\MCTargetDesc\SIMCCodeEmitter.cpp:293!

Tested with r273139 (git # 4a94acfea8bfd6eb6b5809dd40f03e1fa42e673a)

GFX7 lit tests attached.

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