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Bug in gas line no. info, --target=iris

Problem
-------

Gas appears to get the line number debugging information wrong for the
last ".loc" pseudo-op in a source file.

Also, if there's only one ".loc" pseudo-op in a file, it does not
appear in the line number information.

Version
-------

GNU assembler version 940706 (iris), using BFD version cygnus-2.3
(also apparent in gas-2.3)

Test program
------------

        .file   1 "test.s"
        .text
        .ent    test
test:
        .loc    1 1
        li      $2, 1
        .loc    1 2
        li      $2, 2
        .end    test

Output (Using IRIX 4.0.5H)
--------------------------

% as -g test.s -o test.o 
% mips-tdump -l test.o

.
.
        There are 2 bytes holding line numbers, starting at 220.
            Line           1,   delta     0,   count  1
            Line           2,   delta     1,   count  1
.
.

% gas -g test.s -o test.o
% mips-tdump -l test.o
.
.
        There are 2 bytes holding line numbers, starting at 320.
            Line           1,   delta     0,   count  1
            Line           1,   delta     0,   count 16
.
.

----------------------------------------------------------------
David Johnson
International Computer Science Institute