[Bug libfortran/28747] Empty write STREAM I/O file positioning problem

jvdelisle at gcc dot gnu dot org gcc-bugzilla@gcc.gnu.org
Sat Aug 19 03:29:00 GMT 2006



------- Comment #6 from jvdelisle at gcc dot gnu dot org  2006-08-19 03:29 -------
Here is a comparison of no optimization and with -O1.  Does this code look the
same on x86-64 that is not FreeBSD?

Code with no optimization: This does not work.

        call    _gfortran_st_write_done
        movq    $.LC0, -424(%rbp)
        movl    $8, -416(%rbp)
        movl    $10, -428(%rbp)
        movq    $1, -392(%rbp)
        movl    $512, -432(%rbp)
        leaq    -432(%rbp), %rdi
        call    _gfortran_st_write

Code with -O1: This works

        call    _gfortran_st_write_done
        movq    $.LC0, 8(%rsp)
        movl    $8, 16(%rsp)
        movl    $10, 4(%rsp)
        movq    $1, 40(%rsp)
        movl    $512, (%rsp)
        movq    %rsp, %rdi
        call    _gfortran_st_write


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28747



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