[llvm-bugs] [Bug 40873] New: [AMDGPU][MC] Many operands do not accept constant expressions for unclear reason

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=40873

            Bug ID: 40873
           Summary: [AMDGPU][MC] Many operands do not accept constant
                    expressions for unclear reason
           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

Examples:

    x = 1
    v_or3_b32 v1, v2, v3, 1  // ok
    v_or3_b32 v1, v2, v3, x  // error

    y = 0x11213141
    v_madak_f32 v5, v1, v2, 0x11213141 // ok
    v_madak_f32 v5, v1, v2, y          // error

A list of known issues:
- reg/const (isRegOrInlineNoMods)
- reg/lit (isVSrcB64, isVSrcB16, isVSrcF16, isVSrcF16, isVCSrcV2F16 etc)
- sopp, sopk 16-bit  constants
- s_setreg_imm32_b32 32-bit constant
- madak fp constants

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