[llvm-bugs] [Bug 40903] New: [AMDGPU][MC][GFX7][GFX8] src0 of v_movrelsd_b32 should accept vgprs only

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https://bugs.llvm.org/show_bug.cgi?id=40903

            Bug ID: 40903
           Summary: [AMDGPU][MC][GFX7][GFX8] src0 of v_movrelsd_b32 should
                    accept vgprs only
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: AMDGPU
          Assignee: unassignedbugs at nondot.org
          Reporter: dpreobrazhensky at luxoft.com
                CC: llvm-bugs at lists.llvm.org

In contrast with other 'movrels' opcodes, v_movrelsd_b32 accepts an
sgpr/constant as src0. This is incorrect. These operands are not supported by
SP3 for v_movrelsd_b32.

Compare:

    v_movrels_b32 v0, v0  // ok
    v_movrels_b32 v0, s0  // error
    v_movrels_b32 v0, 0   // error

    v_movrelsd_b32 v0, v0  // ok
    v_movrelsd_b32 v0, s0  // ok (but should trigger an error)
    v_movrelsd_b32 v0, 0   // ok (but should trigger an error)

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