[Bug target/42981] New: internal compiler error: in default_secondary_reload, at targhooks.c:660

[Bug target/42981] New: internal compiler error: in default_secondary_reload, at targhooks.c:660

[raj dot khem at gmail dot com]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 1185 bytes --]

gcc ICE's when compiling attached example

arm-none-eabi-gcc lib_pad.i -c -O  -fPIC -mthumb

../ncurses/./base/lib_pad.c: In function ‘pnoutrefresh’:
../ncurses/./base/lib_pad.c:218: internal compiler error: in
default_secondary_reload, at targhooks.c:660
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Target: arm-none-eabi
Configured with: ../sources/gcc-4_4-branch/configure --target=arm-none-eabi
--prefix=/scratch/oss/baremetal/arm-none-eabi/tools --enable-languages=c,c++
--with-newlib
Thread model: single
gcc version 4.4.4 20100203 (prerelease) (GCC)


-- 
           Summary: internal compiler error: in default_secondary_reload, at
                    targhooks.c:660
           Product: gcc
           Version: 4.4.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: raj dot khem at gmail dot com
 GCC build triplet: x86_64-linux-gnu
  GCC host triplet: x86_64-linux-gnu
GCC target triplet: arm-none-eabi


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42981

[Bug target/42981] internal compiler error: in default_secondary_reload, at targhooks.c:660

[raj dot khem at gmail dot com]

------- Comment #1 from raj dot khem at gmail dot com  2010-02-06 00:06 -------
Created an attachment (id=19811)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19811&action=view)
testcase


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42981

[Bug target/42981] internal compiler error: in default_secondary_reload, at targhooks.c:660

[rearnsha at gcc dot gnu dot org]

------- Comment #2 from rearnsha at gcc dot gnu dot org  2010-02-06 13:21 -------
Confirmed


-- 

rearnsha at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|0000-00-00 00:00:00         |2010-02-06 13:21:34
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42981

[Bug target/42981] internal compiler error: in default_secondary_reload, at targhooks.c:660

[rearnsha at gcc dot gnu dot org]

------- Comment #3 from rearnsha at gcc dot gnu dot org  2010-02-06 13:22 -------
Created an attachment (id=19813)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19813&action=view)
Reduced test case


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42981

[Bug target/42981] internal compiler error: in default_secondary_reload, at targhooks.c:660

[mikpe at it dot uu dot se]

------- Comment #4 from mikpe at it dot uu dot se  2010-02-06 21:08 -------
A bisection has identified this as a regression on 4.4 branch triggered by
r147081, the fix for PR39914. The same change was committed to trunk too, but
for some reason doesn't trigger the ICE there.


-- 

mikpe at it dot uu dot se changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mikpe at it dot uu dot se


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42981

[Bug target/42981] internal compiler error: in default_secondary_reload, at targhooks.c:660

[mikpe at it dot uu dot se]

------- Comment #5 from mikpe at it dot uu dot se  2010-02-07 11:17 -------
(In reply to comment #4)
> A bisection has identified this as a regression on 4.4 branch triggered by
> r147081, the fix for PR39914. The same change was committed to trunk too, but
> for some reason doesn't trigger the ICE there.

Trunk also ICEd on this test case for a while, but that was fixed by r147282,
one of several fixes to fwprop/df-problems.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42981

[Bug target/42981] internal compiler error: in default_secondary_reload, at targhooks.c:660

[mikpe at it dot uu dot se]

------- Comment #6 from mikpe at it dot uu dot se  2010-02-07 11:54 -------
gcc-4.5-20100204 ICEs with -O1 -fno-forward-propagate -fPIC -mthumb on the
original test case. So r147282, which enabled fwprop at -O1, merely masked the
problem.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42981