[llvm-bugs] [Bug 38560] New: Arm backend does not recognise "vmov R, R[n]".

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=38560

            Bug ID: 38560
           Summary: Arm backend does not recognise "vmov R, R[n]".
           Product: new-bugs
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: iains-llvm at btconnect.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 20711
  --> https://bugs.llvm.org/attachment.cgi?id=20711&action=edit
add vmov R, R[n] insn alias.

ran into this building newlib.

The documentation for the vmov insn says that in 
"vmov.32 R, R[n]" the ".32" may be ommitted and is assumed to be 32.

patch adds an insn alias for this, unless there's expected to be an alternate
solution?


testcase

=====
$ more /src/test-arm/bare-vmov.S 
#define synd            r0

/*  NEON registers */

#define vdata0_0        d2      /* Lower half of vdata0 */

        .syntax unified
        .arch   armv7-a
        .fpu    neon

        .text
        .thumb_func

        .global foo
        .type foo,%function
        .cfi_startproc

foo:

        /* Termination condition found, let's calculate the syndrome value. */
        vmov            synd, vdata0_0[0]

        bx      lr

        .cfi_endproc
        .size   foo, . - foo

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