[Bug target/26687] gcc -O1 -fno-pic generates bad code that references uninitialized r31

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2006-03-15 12:33 -------
This comes from the following pattern:
(define_insn "movdf_low_si"
  [(set (match_operand:DF 0 "gpc_reg_operand" "=f,!r")
        (mem:DF (lo_sum:SI (match_operand:SI 1 "gpc_reg_operand" "b,b")
                           (match_operand 2 "" ""))))]
  "TARGET_MACHO && TARGET_HARD_FLOAT && TARGET_FPRS && !TARGET_64BIT"

But this has been fixed in 4.1.0 by:
2005-10-08  Andrew Pinski  <pinskia@physics.uc.edu>

        PR target/24136
        * config/rs6000/darwin.md (movdf_low_si): Remove early clobber.
        Rewrite for no need for the early clobber.
2005-09-13  Andrew Pinski  <pinskia@physics.uc.edu>

        * config/rs6000/darwin.md (movdf_low_si): Mark the outgoing r
constraint
        as early clobber.  Rewrite so the PIC register is not implicitly used.

I rewrote this part so that there was no need for the PIC register.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|major                       |normal
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.1.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26687