Bug 42949 - ICE: reload_cse_simplify_operands, at postreload.c:396
Summary: ICE: reload_cse_simplify_operands, at postreload.c:396
Status: RESOLVED WONTFIX
Alias: None
Product: gcc
Classification: Unclassified
Component: target (show other bugs)
Version: 4.5.0
: P3 normal
Target Milestone: ---
Assignee: Not yet assigned to anyone
URL:
Keywords: ice-on-valid-code
Depends on:
Blocks:
 
Reported: 2010-02-03 20:46 UTC by Ryan Mansfield
Modified: 2013-12-17 16:41 UTC (History)
2 users (show)

See Also:
Host: i686-pc-linux-gnu
Target: arm-unknown-linux-gnu
Build: i686-pc-linux-gnu
Known to work:
Known to fail:
Last reconfirmed: 2010-02-06 15:23:48

Attachments
Preprocessed C++ source. (1.54 KB, text/plain)
2010-02-03 20:47 UTC, Ryan Mansfield 		Details
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Ryan Mansfield 2010-02-03 20:46:03 UTC 
ICE in  reload_cse_simplify_operands, at postreload.c:396. ICE doesn't happen with an ARM EABI configuration.

ryan@zoidberg:~/gnu/gcc/trunk/arm/gcc$ ./xgcc -v
Using built-in specs.
COLLECT_GCC=./xgcc
Target: arm-unknown-linux-gnu
Configured with: ../configure --target=arm-unknown-linux-gnu --prefix=/home/ryan/x-tools/arm-unknown-linux-gnu --with-headers=/home/ryan/x-tools/arm-unknown-linux-gnu/arm-unknown-linux-gnu/include --with-local-prefix=/home/ryan/x-tools/arm-unknown-linux-gnu/arm-unknown-linux-gnu --disable-nls --enable-threads=posix --enable-symvers=gnu --enable-__cxa_atexit --enable-languages=c++ --enable-shared --enable-c99 --enable-long-long
Thread model: posix
gcc version 4.5.0 20100203 (experimental) [trunk revision 156467] (GCC) 


ryan@zoidberg:~/gnu/gcc/trunk/arm/gcc$ ./xgcc -B. -O1 -mfpu=vfp -mfloat-abi=softfp ~/ice.ii
/home/ryan/ice.ii: In member function 'virtual TTT* ticu::fold(TOperator, TTT*, TInfoSink&)':
/home/ryan/ice.ii:175:6: error: insn does not satisfy its constraints:
(insn 741 248 742 6 /home/ryan/ice.ii:68 (set (mem/c:SF (plus:SI (reg/f:SI 11 fp)
                (const_int -1024 [0xfffffc00])) [0 %sfp+-1020 S4 A32])
        (reg:SF 78 s15)) 590 {*movsf_vfp} (nil))
/home/ryan/ice.ii:175:6: internal compiler error: in reload_cse_simplify_operands, at postreload.c:396
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Comment 1 Ryan Mansfield 2010-02-03 20:47:27 UTC 
Created attachment 19799 [details]
Preprocessed C++ source.
Comment 2 Richard Earnshaw 2010-02-06 15:23:48 UTC 
Confirmed.  coproc_secondary_reload_class needs to be taught about reg_equiv_mem (at a minimum).
Comment 3 Ian Bolton 2011-03-24 14:24:23 UTC 
For gcc 4.5 r171282, arm-none-linux-gnueabi, I can run this command without error:

arm-none-linux-gnueabi-g++ ~/investigate/pr42949.i -B. -c -O1 -mfpu=vfp

It also works for trunk (r171212).

I therefore think this is fixed or has ceased to be, but it would be good to get confirmation someone else.
Comment 4 Mikael Pettersson 2011-03-24 15:13:17 UTC 
(In reply to comment #3)
> For gcc 4.5 r171282, arm-none-linux-gnueabi, I can run this command without
> error:
> 
> arm-none-linux-gnueabi-g++ ~/investigate/pr42949.i -B. -c -O1 -mfpu=vfp
> 
> It also works for trunk (r171212).
> 
> I therefore think this is fixed or has ceased to be, but it would be good to
> get confirmation someone else.

You tested with an EABI compiler.  The original report stated that the ICE occurs with arm-linux configurations, i.e. OABI, but not with EABI configurations.
Comment 5 Ryan Mansfield 2013-12-17 16:41:44 UTC 
ARM OABI is no longer a supported target