[Bug c/56164] New: avr-gcc 4.7.2 fail with __flash keyword

[Bug c/56164] New: avr-gcc 4.7.2 fail with __flash keyword

[demiurg_spb at freemail dot ru]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56164

             Bug #: 56164
           Summary: avr-gcc 4.7.2 fail with __flash keyword
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: critical
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: demiurg_spb@freemail.ru


Problem is present with __flash keyword, with PROGMEM everything is ok.

Compiller output:
==================================================================
module.c: In function 'foo': 
module.c:52:1: error: unable to find a register to spill in class
'BASE_POINTER_REGS' 
module.c:52:1: error: this is the insn: 
(insn 73 72 74 5 (set (reg:SF 66 [ D.1445 ]) 
(unspec:SF [ 
(reg:HI 30 r30) 
(const_int 0 [0]) 
] UNSPEC_LPM)) module.c:28 9 {load_sf} 
(expr_list:REG_DEAD (reg:HI 30 r30) 
(nil))) 
module.c:52: confused by earlier errors, bailing out 
make.EXE: *** [../bin/test/test.elf] Error 1
==================================================================

[Bug c/56164] avr-gcc 4.7.2 fail with __flash keyword

[demiurg_spb at freemail dot ru]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56164

--- Comment #1 from demiurg_spb at freemail dot ru 2013-01-31 14:30:00 UTC ---
Created attachment 29316
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29316
testcase (zip-archive)

[Bug c/56164] avr-gcc 4.7.2 fail with __flash keyword

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56164

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2013-01-31
                 CC|                            |gjl at gcc dot gnu.org
     Ever Confirmed|0                           |1

--- Comment #2 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2013-01-31 15:24:58 UTC ---
(In reply to comment #1)
> testcase (zip-archive)

Please provide a test case, following the bug reporting instructions in 

http://gcc.gnu.org/bugs/#report

[Bug c/56164] avr-gcc 4.7.2 fail with __flash keyword

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56164

--- Comment #3 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2013-01-31 20:25:20 UTC ---
Created attachment 29322
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29322
Small an valis test case

Output with avr-gcc 4.7.2:

avr-gcc -S -mmcu=atmega8  -Os foo.c
foo.c: In function 'psy':
foo.c:18:1: error: unable to find a register to spill in class 'POINTER_REGS'
 }
 ^
foo.c:18:1: error: this is the insn:
(insn 26 25 28 2 (set (reg:SF 59 [ D.1396 ])
        (unspec:SF [
                (reg:HI 30 r30)
                (const_int 0 [0])
            ] UNSPEC_LPM)) foo.c:9 22 {load_sf}
     (expr_list:REG_DEAD (reg:HI 30 r30)
        (nil)))
foo.c:18:1: internal compiler error: in spill_failure, at reload1.c:2124
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

[Bug target/56164] [avr] ICE: spill fail with __flash keyword

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56164

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |avr
           Priority|P3                          |P4
             Status|WAITING                     |NEW
           Keywords|                            |ice-on-valid-code
          Component|c                           |target
            Summary|avr-gcc 4.7.2 fail with     |[avr] ICE: spill fail with
                   |__flash keyword             |__flash keyword
   Target Milestone|---                         |4.7.3
      Known to fail|                            |4.7.2
           Severity|critical                    |normal

[Bug target/56164] [avr] ICE: spill fail with __flash keyword

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56164

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2013-01-31 00:00:00         |2013-02-07 0:00

--- Comment #4 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2013-02-07 17:45:56 UTC ---
Confirmed with:

gcc version 4.7.3 20130207 (prerelease) [gcc-4_7-branch revision 195858] (GCC)

Configured with:

../../gcc.gnu.org/gcc-4_7-branch/configure --target=avr
--prefix=/local/gnu/install/gcc-4.7 --disable-nls --with-dwarf2
--enable-languages=c,c++ --enable-target-optspace=yes --with-avrlibc=yes

Invocation:

avr-gcc spill-flash-2.c -S -Os -mmcu=atmega8

spill-flash.c: In function 'psy':
spill-flash.c:18:1: error: unable to find a register to spill in class
'POINTER_REGS'
spill-flash.c:18:1: error: this is the insn:
(insn 26 25 28 2 (set (reg:SF 59 [ D.1370 ])
        (unspec:SF [
                (reg:HI 30 r30)
                (const_int 0 [0])
            ] UNSPEC_LPM)) spill-flash.c:9 9 {load_sf}
     (expr_list:REG_DEAD (reg:HI 30 r30)
        (nil)))
spill-flash.c:18: confused by earlier errors, bailing out

[Bug target/56164] [avr] ICE: spill fail with __flash keyword

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56164

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.7.3                       |4.7.4

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> 2013-04-11 07:58:55 UTC ---
GCC 4.7.3 is being released, adjusting target milestone.

[Bug target/56164] [avr] ICE: spill fail with __flash keyword

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56164

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.7.4                       |---

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Unsetting target milestone of open non-regression bug from version of branch
being closed.