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* [Bug middle-end/25905] New: [4.2 regression] ICE in expand_compound_operation
@ 2006-01-21 23:24 schwab at suse dot de
2006-01-21 23:25 ` [Bug middle-end/25905] " schwab at suse dot de
` (11 more replies)
0 siblings, 12 replies; 13+ messages in thread
From: schwab at suse dot de @ 2006-01-21 23:24 UTC (permalink / raw)
To: gcc-bugs
$ ./xgcc -B./ unwind-dw2-fde-glibc.i -S -O -v
Reading specs from ./specs
Target: m68k-linux
Configured with: ../gcc/configure --prefix=/usr/local/m68k-linux
--host=powerpc-linux --target=m68k-linux
--with-sysroot=/usr/local/m68k-linux/m68k-linux/sys-root --enable-shared
--enable-__cxa_atexit --with-system-zlib
--enable-languages=c,c++,fortran,java,objc --no-create --no-recursion
Thread model: posix
gcc version 4.2.0 20060121 (experimental)
./cc1 -fpreprocessed unwind-dw2-fde-glibc.i -quiet -dumpbase
unwind-dw2-fde-glibc.i -auxbase unwind-dw2-fde-glibc -O -version -o
unwind-dw2-fde-glibc.s
GNU C version 4.2.0 20060121 (experimental) (m68k-linux)
compiled by GNU C version 4.0.2 20050901 (prerelease) (SUSE Linux).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 0ad6bd3654ebd3f56f26d23ad96d1796
../../gcc/gcc/unwind-dw2-fde.c: In function
‘fde_single_encoding_compare’:
../../gcc/gcc/unwind-dw2-fde.c:350: internal compiler error: in
expand_compound_operation, at combine.c:5644
Caused by:
r109961 | bonzini | 2006-01-19 15:54:57 +0100 (Do, 19 Jan 2006) | 13 lines
2006-01-19 Paolo Bonzini <bonzini@gnu.org>
* combine.c (try_combine): Do not worry about MEMs wrapped by USEs.
(expand_compound_operation, expand_field_assignment): Fail if the
bit lengths of an extract operation are out of range.
(make_extraction): Compute wanted_inner_mode based on the position
and length of the extraction. Make it extraction_mode for non-constant
positions, and do not modify offset in that case. When generating a
new MEM, use a mode that can hold the extraction while keeping correct
alignment. Remove code that supported MEMs wrapped by USEs.
(simplify_shift_const_1, force_to_mode) <case USE>: Remove.
--
Summary: [4.2 regression] ICE in expand_compound_operation
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: schwab at suse dot de
GCC target triplet: m68k-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25905
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25905] [4.2 regression] ICE in expand_compound_operation
2006-01-21 23:24 [Bug middle-end/25905] New: [4.2 regression] ICE in expand_compound_operation schwab at suse dot de
@ 2006-01-21 23:25 ` schwab at suse dot de
2006-01-21 23:41 ` pinskia at gcc dot gnu dot org
` (10 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: schwab at suse dot de @ 2006-01-21 23:25 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from schwab at suse dot de 2006-01-21 23:25 -------
Created an attachment (id=10696)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=10696&action=view)
Testcase
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25905
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25905] [4.2 regression] ICE in expand_compound_operation
2006-01-21 23:24 [Bug middle-end/25905] New: [4.2 regression] ICE in expand_compound_operation schwab at suse dot de
2006-01-21 23:25 ` [Bug middle-end/25905] " schwab at suse dot de
@ 2006-01-21 23:41 ` pinskia at gcc dot gnu dot org
2006-01-21 23:44 ` pinskia at gcc dot gnu dot org
` (9 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-01-21 23:41 UTC (permalink / raw)
To: gcc-bugs
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu dot
| |org
Target Milestone|--- |4.2.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25905
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25905] [4.2 regression] ICE in expand_compound_operation
2006-01-21 23:24 [Bug middle-end/25905] New: [4.2 regression] ICE in expand_compound_operation schwab at suse dot de
2006-01-21 23:25 ` [Bug middle-end/25905] " schwab at suse dot de
2006-01-21 23:41 ` pinskia at gcc dot gnu dot org
@ 2006-01-21 23:44 ` pinskia at gcc dot gnu dot org
2006-01-22 13:41 ` pbrook at gcc dot gnu dot org
` (8 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-01-21 23:44 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from pinskia at gcc dot gnu dot org 2006-01-21 23:44 -------
I think this is related to PR 25890 which is reproducible on x86_64-linux-gnu
also.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |25890
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25905
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25905] [4.2 regression] ICE in expand_compound_operation
2006-01-21 23:24 [Bug middle-end/25905] New: [4.2 regression] ICE in expand_compound_operation schwab at suse dot de
` (2 preceding siblings ...)
2006-01-21 23:44 ` pinskia at gcc dot gnu dot org
@ 2006-01-22 13:41 ` pbrook at gcc dot gnu dot org
2006-01-23 8:14 ` bonzini at gnu dot org
` (7 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: pbrook at gcc dot gnu dot org @ 2006-01-22 13:41 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from pbrook at gcc dot gnu dot org 2006-01-22 13:41 -------
Smaller testcase:
void
read_encoded_value_with_base (const unsigned char *p, unsigned * val)
{
union unaligned
{
unsigned short u2;
}
__attribute__ ((__packed__));
const union unaligned *u = (const union unaligned *) p;
*val = u->u2;
}
--
pbrook at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2006-01-22 13:41:02
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25905
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25905] [4.2 regression] ICE in expand_compound_operation
2006-01-21 23:24 [Bug middle-end/25905] New: [4.2 regression] ICE in expand_compound_operation schwab at suse dot de
` (3 preceding siblings ...)
2006-01-22 13:41 ` pbrook at gcc dot gnu dot org
@ 2006-01-23 8:14 ` bonzini at gnu dot org
2006-01-23 8:22 ` bonzini at gnu dot org
` (6 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: bonzini at gnu dot org @ 2006-01-23 8:14 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from bonzini at gnu dot org 2006-01-23 08:14 -------
The ICE is the same, but the cause is probably different as 25890 is an
ICE-on-undefined.
I think it's easiest to punt and return failure instead of asserting, but I
want to investigate how we reach the assertion failure in this case.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25905
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25905] [4.2 regression] ICE in expand_compound_operation
2006-01-21 23:24 [Bug middle-end/25905] New: [4.2 regression] ICE in expand_compound_operation schwab at suse dot de
` (4 preceding siblings ...)
2006-01-23 8:14 ` bonzini at gnu dot org
@ 2006-01-23 8:22 ` bonzini at gnu dot org
2006-01-23 8:28 ` bonzini at gnu dot org
` (5 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: bonzini at gnu dot org @ 2006-01-23 8:22 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from bonzini at gnu dot org 2006-01-23 08:22 -------
I cannot reproduce Paul's testcase, but I found this one:
struct object
{
unsigned long mixed_encoding:1;
unsigned long encoding:8;
}
__attribute__ ((packed));
int search_object (struct object *ob)
{
return ob->encoding == 0x00;
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25905
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25905] [4.2 regression] ICE in expand_compound_operation
2006-01-21 23:24 [Bug middle-end/25905] New: [4.2 regression] ICE in expand_compound_operation schwab at suse dot de
` (5 preceding siblings ...)
2006-01-23 8:22 ` bonzini at gnu dot org
@ 2006-01-23 8:28 ` bonzini at gnu dot org
2006-01-23 8:47 ` kkojima at gcc dot gnu dot org
` (4 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: bonzini at gnu dot org @ 2006-01-23 8:28 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from bonzini at gnu dot org 2006-01-23 08:28 -------
Uhm, expand has a bug and creates an invalid
(insn 11 7 12 2 (set (subreg:SI (reg:QI 33) 0)
(zero_extract:SI (mem/s:QI (reg/v/f:SI 31 [ ob ]) [0 S1 A8])
(const_int 8 [0x8])
(const_int 1 [0x1]))) 354 {*m68k.md:4965} (insn_list:REG_DEP_TRUE 6
(nil))
(expr_list:REG_DEAD (reg/v/f:SI 31 [ ob ])
(nil)))
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25905
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25905] [4.2 regression] ICE in expand_compound_operation
2006-01-21 23:24 [Bug middle-end/25905] New: [4.2 regression] ICE in expand_compound_operation schwab at suse dot de
` (6 preceding siblings ...)
2006-01-23 8:28 ` bonzini at gnu dot org
@ 2006-01-23 8:47 ` kkojima at gcc dot gnu dot org
2006-01-23 10:01 ` bonzini at gnu dot org
` (3 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: kkojima at gcc dot gnu dot org @ 2006-01-23 8:47 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from kkojima at gcc dot gnu dot org 2006-01-23 08:47 -------
*** Bug 25919 has been marked as a duplicate of this bug. ***
--
kkojima at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kkojima at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25905
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25905] [4.2 regression] ICE in expand_compound_operation
2006-01-21 23:24 [Bug middle-end/25905] New: [4.2 regression] ICE in expand_compound_operation schwab at suse dot de
` (7 preceding siblings ...)
2006-01-23 8:47 ` kkojima at gcc dot gnu dot org
@ 2006-01-23 10:01 ` bonzini at gnu dot org
2006-01-23 20:42 ` joel at gcc dot gnu dot org
` (2 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: bonzini at gnu dot org @ 2006-01-23 10:01 UTC (permalink / raw)
To: gcc-bugs
--
bonzini at gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |bonzini at gnu dot org
|dot org |
Status|NEW |ASSIGNED
Last reconfirmed|2006-01-22 13:41:02 |2006-01-23 10:01:48
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25905
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25905] [4.2 regression] ICE in expand_compound_operation
2006-01-21 23:24 [Bug middle-end/25905] New: [4.2 regression] ICE in expand_compound_operation schwab at suse dot de
` (8 preceding siblings ...)
2006-01-23 10:01 ` bonzini at gnu dot org
@ 2006-01-23 20:42 ` joel at gcc dot gnu dot org
2006-01-24 14:29 ` bonzini at gcc dot gnu dot org
2006-01-24 14:30 ` bonzini at gnu dot org
11 siblings, 0 replies; 13+ messages in thread
From: joel at gcc dot gnu dot org @ 2006-01-23 20:42 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from joel at gcc dot gnu dot org 2006-01-23 20:42 -------
sh-rtems fails to build also. Andrew thought it was related so I am adding
myself and this link to my failure post.
http://gcc.gnu.org/ml/gcc/2006-01/msg00869.html
--
joel at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |joel at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25905
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25905] [4.2 regression] ICE in expand_compound_operation
2006-01-21 23:24 [Bug middle-end/25905] New: [4.2 regression] ICE in expand_compound_operation schwab at suse dot de
` (9 preceding siblings ...)
2006-01-23 20:42 ` joel at gcc dot gnu dot org
@ 2006-01-24 14:29 ` bonzini at gcc dot gnu dot org
2006-01-24 14:30 ` bonzini at gnu dot org
11 siblings, 0 replies; 13+ messages in thread
From: bonzini at gcc dot gnu dot org @ 2006-01-24 14:29 UTC (permalink / raw)
To: gcc-bugs
------- Comment #9 from bonzini at gnu dot org 2006-01-24 14:29 -------
Subject: Bug 25905
Author: bonzini
Date: Tue Jan 24 14:29:25 2006
New Revision: 110170
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=110170
Log:
2006-01-23 Paolo Bonzini <bonzini@gnu.org>
PR rtl-optimization/25890
PR rtl-optimization/25905
* combine.c (expand_compound_operation, expand_field_assignment):
Fail if the bitfield's final position is out of bounds.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/combine.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25905
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug middle-end/25905] [4.2 regression] ICE in expand_compound_operation
2006-01-21 23:24 [Bug middle-end/25905] New: [4.2 regression] ICE in expand_compound_operation schwab at suse dot de
` (10 preceding siblings ...)
2006-01-24 14:29 ` bonzini at gcc dot gnu dot org
@ 2006-01-24 14:30 ` bonzini at gnu dot org
11 siblings, 0 replies; 13+ messages in thread
From: bonzini at gnu dot org @ 2006-01-24 14:30 UTC (permalink / raw)
To: gcc-bugs
------- Comment #10 from bonzini at gnu dot org 2006-01-24 14:30 -------
Patch committed.
--
bonzini at gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25905
^ permalink raw reply [flat|nested] 13+ messages in thread
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2006-01-21 23:24 [Bug middle-end/25905] New: [4.2 regression] ICE in expand_compound_operation schwab at suse dot de
2006-01-21 23:25 ` [Bug middle-end/25905] " schwab at suse dot de
2006-01-21 23:41 ` pinskia at gcc dot gnu dot org
2006-01-21 23:44 ` pinskia at gcc dot gnu dot org
2006-01-22 13:41 ` pbrook at gcc dot gnu dot org
2006-01-23 8:14 ` bonzini at gnu dot org
2006-01-23 8:22 ` bonzini at gnu dot org
2006-01-23 8:28 ` bonzini at gnu dot org
2006-01-23 8:47 ` kkojima at gcc dot gnu dot org
2006-01-23 10:01 ` bonzini at gnu dot org
2006-01-23 20:42 ` joel at gcc dot gnu dot org
2006-01-24 14:29 ` bonzini at gcc dot gnu dot org
2006-01-24 14:30 ` bonzini at gnu dot org
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