MIPS: va_arg is unable to correct extract an empty zero-length array

[Nick Clifton]

Hi Eric, Hi Richard,

  A customer has reported the following bug with the MIPS target.  Since
  it is for a GNU extension to the C language (zero-length arrays) that
  is being used in a non-intended fashion (the zero-length array is in a
  structure with no other fields) I doubt if you will want to
  investigate the problem too much, but I thought that it was worth
  reporting anyway:

    % mips64vr-elf-gcc -mgp32 -O2 -Tddb.ld -march=vr5500 bug.c
    % mips64vr-elf-run a.out
    assertion "arg4 == va4" failed: file "bug.c", line 40, function: foo

  As an aside if the type3 structure in bug.c is given another,
  non-zero-length field, then the test passes.

Cheers
  Nick

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