[Bug gas/19620] New: [AArch64] Register name is not allowed as symbol name in mov[k,z,n] instructions.

[renlin.li at arm dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=19620

            Bug ID: 19620
           Summary: [AArch64] Register name is not allowed as symbol name
                    in mov[k,z,n] instructions.
           Product: binutils
           Version: 2.27 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: renlin.li at arm dot com
  Target Milestone: ---

In AArch64 gas, register name or string starts with valid register name
(followed by a dot) is rejected as symbol name for mov[z,k,n] instruction.

The restriction applies to all w/x register and sp/wzr/xzr register.

For example, the following instructions are illegal according to current
implementation. Because 'x2' is viewed as a register.

movk x2, #:abs_g0_nc: x2.22
movk x2, #:abs_g0_nc: x2

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