--- Comment #4 from philpem at philpem dot me dot uk 2010-04-22 21:28
---
I've just bisected the source tree with "svn-bisect" -- starting at rev 154096
(the first rev with lm32 support), ending at 158339 (gcc 4.5.0 release).
Turns out the bug was introduced in or befor
--- Comment #2 from philpem at philpem dot me dot uk 2010-04-19 20:33
---
Admittedly removing -O2 does fix the ICE in this file, however a different
source file (mm/filemap.c) causes a gcc ICE when it isn't built with -O2:
mm/filemap.c: In function do_generic_file_read:
mm/file
--- Comment #1 from philpem at philpem dot me dot uk 2010-04-19 20:27
---
Created an attachment (id=20426)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20426&action=view)
timerfd intermediate file
.i file, requested per bug reporting guidelines
--
http://gcc.
l:
fs/timerfd.c:105:1: error: unrecognizable insn:
(insn 44 43 45 5 fs/timerfd.c:94 (set (reg:SI 68)
(subreg:SI (mem/s:DI (plus:SI (reg/v/f:SI 39 [ ctx ])
(const_int 64 [0x40])) [0 S8 A64]) 4)) -1 (nil))
fs/timerfd.c:105:1: internal compiler error: in extract_insn, at recog.c:2103
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
This kernel compiles fine with gcc 3.4.0 and the lm32 patch which was published
on the GCC mailing list.
Removing "-O2" from the command line allows gcc to pass the ICE and compile
successfully.
--
Summary: ICE when building Linux kernel 2.6.34-rc4
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: philpem at philpem dot me dot uk
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43805
