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* [Bug target/28896]  New: m68k port quietly accepts -fstack-limit-symbol on ColdFire
@ 2006-08-30  6:14 kazu at gcc dot gnu dot org
  2006-08-31  2:50 ` [Bug target/28896] conditional trap goes messed up pinskia at gcc dot gnu dot org
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: kazu at gcc dot gnu dot org @ 2006-08-30  6:14 UTC (permalink / raw)
  To: gcc-bugs

m68k port quietly accepts -fstack-limit-symbol on ColdFire.

-fstack-limit-symbol causes gcc to output "trapcs".
However, ColdFire does not support any conditional trap.


-- 
           Summary: m68k port quietly accepts -fstack-limit-symbol on
                    ColdFire
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kazu at gcc dot gnu dot org
GCC target triplet: m68k-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28896


^ permalink raw reply	[flat|nested] 4+ messages in thread
* [Bug target/28896] conditional trap goes messed up
  2006-08-30  6:14 [Bug target/28896] New: m68k port quietly accepts -fstack-limit-symbol on ColdFire kazu at gcc dot gnu dot org
@ 2006-08-31  2:50 ` pinskia at gcc dot gnu dot org
  2006-08-31  2:58 ` kazu at gcc dot gnu dot org
  2006-08-31  3:06 ` [Bug target/28896] -fstack-limit-symbol and m68k and non 68020 pinskia at gcc dot gnu dot org
  2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-08-31  2:50 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #1 from pinskia at gcc dot gnu dot org  2006-08-31 02:50 -------
Actually it is not just -fstack-limit-symbol that could go wrong but it is also
builtin_trap:
(define_insn "conditional_trap"
  [(trap_if (match_operator 0 "valid_dbcc_comparison_p"
                            [(cc0) (const_int 0)])
            (match_operand:SI 1 "const_int_operand" "I"))]
  "TARGET_68020 && ! flags_in_68881 ()"

Are you sure you supplied the correct flags to the compiler because
conditional_trap is only enabled for 020.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|m68k port quietly accepts - |conditional trap goes messed
                   |fstack-limit-symbol on      |up
                   |ColdFire                    |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28896


^ permalink raw reply	[flat|nested] 4+ messages in thread
* [Bug target/28896] conditional trap goes messed up
  2006-08-30  6:14 [Bug target/28896] New: m68k port quietly accepts -fstack-limit-symbol on ColdFire kazu at gcc dot gnu dot org
  2006-08-31  2:50 ` [Bug target/28896] conditional trap goes messed up pinskia at gcc dot gnu dot org
@ 2006-08-31  2:58 ` kazu at gcc dot gnu dot org
  2006-08-31  3:06 ` [Bug target/28896] -fstack-limit-symbol and m68k and non 68020 pinskia at gcc dot gnu dot org
  2 siblings, 0 replies; 4+ messages in thread
From: kazu at gcc dot gnu dot org @ 2006-08-31  2:58 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #2 from kazu at gcc dot gnu dot org  2006-08-31 02:58 -------
trapcs for -fstack-limit-symbol is printed as text in m68k.c,
not as an insn in m68k.md.

Search for trapcs in m68k.c.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28896


^ permalink raw reply	[flat|nested] 4+ messages in thread
* [Bug target/28896] -fstack-limit-symbol and m68k and non 68020
  2006-08-30  6:14 [Bug target/28896] New: m68k port quietly accepts -fstack-limit-symbol on ColdFire kazu at gcc dot gnu dot org
  2006-08-31  2:50 ` [Bug target/28896] conditional trap goes messed up pinskia at gcc dot gnu dot org
  2006-08-31  2:58 ` kazu at gcc dot gnu dot org
@ 2006-08-31  3:06 ` pinskia at gcc dot gnu dot org
  2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-08-31  3:06 UTC (permalink / raw)
  To: gcc-bugs



------- Comment #3 from pinskia at gcc dot gnu dot org  2006-08-31 03:06 -------
Oh:
  if (current_function_limit_stack
      && GET_CODE (stack_limit_rtx) == SYMBOL_REF)
    asm_fprintf (stream, "\tcmp" ASM_DOT "l %I%s+%wd,%Rsp\n\ttrapcs\n",
                 XSTR (stack_limit_rtx, 0), current_frame.size + 4);

So this is a problem with more than coldfire then and also 68000 and 68010 code
gen.

Really m68k_output_function_prologue should be rewritten to use rtl patterns
instead of text.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-08-31 03:06:40
               date|                            |
            Summary|conditional trap goes messed|-fstack-limit-symbol and
                   |up                          |m68k and non 68020


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28896


^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2006-08-31  3:06 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2006-08-30  6:14 [Bug target/28896] New: m68k port quietly accepts -fstack-limit-symbol on ColdFire kazu at gcc dot gnu dot org
2006-08-31  2:50 ` [Bug target/28896] conditional trap goes messed up pinskia at gcc dot gnu dot org
2006-08-31  2:58 ` kazu at gcc dot gnu dot org
2006-08-31  3:06 ` [Bug target/28896] -fstack-limit-symbol and m68k and non 68020 pinskia at gcc dot gnu dot org

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