[Bug target/19636] Can't compile ethernut OS (avr-gcc)

[Bug target/19636] Can't compile ethernut OS (avr-gcc)

[berndtrog at yahoo dot com]

------- Comment #11 from berndtrog at yahoo dot com  2005-12-05 18:34 -------
Compiling of usart.i still fails:

usart.c: In function 'UsartIOCtl':
usart.c:821: error: unable to find a register to spill in class
'BASE_POINTER_REGS'
usart.c:821: error: this is the insn:
(insn 663 162 163 14 (set (mem:HI (plus:HI (reg/f:HI 28 r28)
                (const_int 1 [0x1])) [31 S2 A8])
        (reg:HI 24 r24)) 12 {*movhi} (nil)
    (nil))
usart.c:821: confused by earlier errors, bailing out

Tested with: 4.0.3 20051123, 4.1.0 20051202, 4.2.0 20051202

It compiles OK with 3.4.5 


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] Can't compile ethernut OS (avr-gcc)

[plessl at tik dot ee dot ethz dot ch]

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------- Comment #12 from plessl at tik dot ee dot ethz dot ch  2006-10-11 08:44 -------
I can confirm that this bug still exists on with avr-gcc (GCC) 4.0.2 (running
on Mac OS X 10.4.8/PPC, installed via Macports)

avr-gcc -Os ~/Documents/Downloads/usart.iusart.c: In function ‘UsartIOCtl’:
usart.c:821: error: unable to find a register to spill in class
‘BASE_POINTER_REGS’
usart.c:821: error: this is the insn:
(insn 663 162 163 14 (set (mem:HI (plus:HI (reg/f:HI 28 r28)
                (const_int 1 [0x1])) [31 S2 A8])
        (reg:HI 24 r24)) 12 {*movhi} (nil)
    (nil))
usart.c:821: confused by earlier errors, bailing out


Is there any news on this bug? 


-- 

plessl at tik dot ee dot ethz dot ch changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |plessl at tik dot ee dot
                   |                            |ethz dot ch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] Can't compile ethernut OS (avr-gcc)

[eweddington at cso dot atmel dot com]

------- Comment #13 from eweddington at cso dot atmel dot com  2006-10-11 17:05 -------
(In reply to comment #12)
> I can confirm that this bug still exists on with avr-gcc (GCC) 4.0.2 (running
> on Mac OS X 10.4.8/PPC, installed via Macports)
<snip>
> Is there any news on this bug? 

Sorry, no. Your comment has been the latest news.

Can you try using GCC 4.1.1 and see if you can still reproduce this bug? That
would be very informative.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] Can't compile ethernut OS (avr-gcc)

[plessl at tik dot ee dot ethz dot ch]

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------- Comment #14 from plessl at tik dot ee dot ethz dot ch  2006-10-17 14:43 -------
(In reply to comment #13)
> Can you try using GCC 4.1.1 and see if you can still reproduce this bug? That
> would be very informative.

Yes, the bug is still present in gcc-4.1.1, see below. I also had problems
building gcc-4.1.1 for avr. libssp doesn't compile for this target, hence I had
to disable it  by passing --disable-libssp to configure.

usart.c: In function ‘UsartIOCtl’:
usart.c:821: error: unable to find a register to spill in class
‘BASE_POINTER_REGS’
usart.c:821: error: this is the insn:
(insn 663 162 163 14 (set (mem/c:HI (plus:HI (reg/f:HI 28 r28)
                (const_int 1 [0x1])) [27 S2 A8])
        (reg:HI 24 r24)) 12 {*movhi} (nil)
    (nil))
usart.c:821: confused by earlier errors, bailing out


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] Can't compile ethernut OS (avr-gcc)

[yuecelm at ee dot ethz dot ch]

------- Comment #15 from yuecelm at ee dot ethz dot ch  2006-10-27 10:31 -------
Found an important hint:

If the switch instruction is replaced with else ifs, the file is also
compilable with the -Os option. It seems that the avr-gcc >4.0 can only
optimize a limited number of cases (the file usart.i has 33 cases in one switch
statement).


-- 

yuecelm at ee dot ethz dot ch changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |yuecelm at ee dot ethz dot
                   |                            |ch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] Can't compile ethernut OS (avr-gcc)

[eweddington at cso dot atmel dot com]

-- 

eweddington at cso dot atmel dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
      Known to fail|4.0.0                       |4.0.0 4.0.2 4.1.1
   Last reconfirmed|0000-00-00 00:00:00         |2007-04-09 22:14:02
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] Can't compile ethernut OS (avr-gcc)

[eweddington at cso dot atmel dot com]

------- Comment #16 from eweddington at cso dot atmel dot com  2007-05-21 17:03 -------
Fails with 4.1.2.


-- 

eweddington at cso dot atmel dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|4.0.0 4.0.2 4.1.1           |4.0.0 4.0.2 4.1.1 4.1.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] [4.0/4.1/4.2 regression] Can't compile large switch statement

[eweddington at cso dot atmel dot com]

------- Comment #17 from eweddington at cso dot atmel dot com  2007-05-21 17:09 -------
Fails on 4.2.0.


-- 

eweddington at cso dot atmel dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|4.0.0 4.0.2 4.1.1 4.1.2     |4.0.0 4.0.2 4.1.1 4.1.2
                   |                            |4.2.0
            Summary|Can't compile ethernut OS   |[4.0/4.1/4.2 regression]
                   |(avr-gcc)                   |Can't compile large switch
                   |                            |statement
   Target Milestone|---                         |4.2.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] [4.0/4.1/4.2 regression] Can't compile large switch statement

[eweddington at cso dot atmel dot com]

------- Comment #18 from eweddington at cso dot atmel dot com  2007-05-21 17:17 -------
Using the target specific option -mno-tablejump fixes the bug for 4.1.2 and
4.2.0.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] [4.0/4.1/4.2 regression] Can't compile large switch statement

[eweddington at cso dot atmel dot com]

------- Comment #19 from eweddington at cso dot atmel dot com  2007-05-30 18:59 -------
Testcase succeeds with 4.3-20070525, with all -O settings. Changing target
milestone to 4.3.0, lowering priority.


-- 

eweddington at cso dot atmel dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P2                          |P4
   Target Milestone|4.2.1                       |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] [4.0/4.1/4.2 regression] Can't compile large switch statement

[jsm28 at gcc dot gnu dot org]

------- Comment #20 from jsm28 at gcc dot gnu dot org  2008-03-15 00:39 -------
Update milestone after 4.3.0 release.


-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.3.0                       |4.3.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] [4.0/4.1/4.2 regression] Can't compile large switch statement

[jsm28 at gcc dot gnu dot org]

-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.3.1                       |4.2.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] [4.1/4.2 regression] Can't compile large switch statement

[jsm28 at gcc dot gnu dot org]

------- Comment #21 from jsm28 at gcc dot gnu dot org  2008-05-19 20:22 -------
4.2.4 is being released, changing milestones to 4.2.5.


-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.2.4                       |4.2.5


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] [4.2 regression] Can't compile large switch statement

[jsm28 at gcc dot gnu dot org]

------- Comment #22 from jsm28 at gcc dot gnu dot org  2008-07-04 22:45 -------
Closing 4.1 branch.


-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.1/4.2 regression] Can't  |[4.2 regression] Can't
                   |compile large switch        |compile large switch
                   |statement                   |statement


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] [4.2 regression] Can't compile large switch statement

[aesok at gcc dot gnu dot org]

------- Comment #23 from aesok at gcc dot gnu dot org  2008-09-14 12:51 -------
Subject: Bug 19636

Author: aesok
Date: Sun Sep 14 12:50:10 2008
New Revision: 140360

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=140360
Log:
        PR target/19636
        PR target/24894
        PR target/31644
        PR target/31786
        * config/avr/avr.c (legitimate_address_p): Fix problem where subreg
        is not recognized as a valid register usage. Allow REG_X to be used
        as a base pointer.
        * config/avr/avr.h (LEGITIMIZE_RELOAD_ADDRESS): Remove code that
        forces a reload when using a base register.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/avr/avr.c
    trunk/gcc/config/avr/avr.h


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636

[Bug target/19636] [4.2 regression] Can't compile large switch statement

[jsm28 at gcc dot gnu dot org]

------- Comment #24 from jsm28 at gcc dot gnu dot org  2009-03-30 15:39 -------
Closing 4.2 branch, reported as working with 4.3.


-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
      Known to fail|4.0.0 4.0.2 4.0.4 4.1.1     |4.0.0 4.0.2 4.0.4 4.1.1
                   |4.1.2 4.2.0                 |4.1.2 4.2.0 4.2.5
      Known to work|3.3.2 3.4.3                 |3.3.2 3.4.3 4.3.0
         Resolution|                            |FIXED
   Target Milestone|4.2.5                       |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19636