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* [Bug tree-optimization/39804] New: internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754
@ 2009-04-18 9:51 segher at kernel dot crashing dot org
2009-04-18 9:53 ` [Bug tree-optimization/39804] " segher at kernel dot crashing dot org
` (8 more replies)
0 siblings, 9 replies; 10+ messages in thread
From: segher at kernel dot crashing dot org @ 2009-04-18 9:51 UTC (permalink / raw)
To: gcc-bugs
i386-linux-gcc -O1 -S probe_roms_32.i
/home/segher/src/kernel/arch/x86/kernel/probe_roms_32.c: In function
'romchecksum':
/home/segher/src/kernel/arch/x86/kernel/probe_roms_32.c:165: internal compiler
error: in propagate_necessity, at tree-ssa-dce.c:754
--
Summary: internal compiler error: in propagate_necessity, at
tree-ssa-dce.c:754
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: segher at kernel dot crashing dot org
GCC host triplet: x86_64-linux
GCC target triplet: i386-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39804
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/39804] internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754
2009-04-18 9:51 [Bug tree-optimization/39804] New: internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754 segher at kernel dot crashing dot org
@ 2009-04-18 9:53 ` segher at kernel dot crashing dot org
2009-04-18 10:03 ` rguenth at gcc dot gnu dot org
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: segher at kernel dot crashing dot org @ 2009-04-18 9:53 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from segher at kernel dot crashing dot org 2009-04-18 09:53 -------
Created an attachment (id=17653)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17653&action=view)
testcase, not minimised
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39804
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/39804] internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754
2009-04-18 9:51 [Bug tree-optimization/39804] New: internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754 segher at kernel dot crashing dot org
2009-04-18 9:53 ` [Bug tree-optimization/39804] " segher at kernel dot crashing dot org
@ 2009-04-18 10:03 ` rguenth at gcc dot gnu dot org
2009-04-18 10:05 ` rguenth at gcc dot gnu dot org
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-04-18 10:03 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from rguenth at gcc dot gnu dot org 2009-04-18 10:02 -------
Mine.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |rguenth at gcc dot gnu dot
|dot org |org
Status|UNCONFIRMED |ASSIGNED
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2009-04-18 10:02:49
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39804
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/39804] internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754
2009-04-18 9:51 [Bug tree-optimization/39804] New: internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754 segher at kernel dot crashing dot org
2009-04-18 9:53 ` [Bug tree-optimization/39804] " segher at kernel dot crashing dot org
2009-04-18 10:03 ` rguenth at gcc dot gnu dot org
@ 2009-04-18 10:05 ` rguenth at gcc dot gnu dot org
2009-04-18 10:06 ` [Bug tree-optimization/39804] [4.5 Regression] " rguenth at gcc dot gnu dot org
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-04-18 10:05 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from rguenth at gcc dot gnu dot org 2009-04-18 10:05 -------
Hmm, I get
./cc1 -quiet -O probe_roms_32.i
/home/segher/src/kernel/arch/x86/kernel/probe_roms_32.c: In function
'romchecksum':
/home/segher/src/kernel/arch/x86/kernel/probe_roms_32.c:165: error: found a
real definition for a non-register
/home/segher/src/kernel/arch/x86/kernel/probe_roms_32.c:165: error: in
statement
c.368_15 = c_12(D);
/home/segher/src/kernel/arch/x86/kernel/probe_roms_32.c:165: internal compiler
error: verify_ssa failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39804
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/39804] [4.5 Regression] internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754
2009-04-18 9:51 [Bug tree-optimization/39804] New: internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754 segher at kernel dot crashing dot org
` (2 preceding siblings ...)
2009-04-18 10:05 ` rguenth at gcc dot gnu dot org
@ 2009-04-18 10:06 ` rguenth at gcc dot gnu dot org
2009-04-18 10:22 ` rguenth at gcc dot gnu dot org
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-04-18 10:06 UTC (permalink / raw)
To: gcc-bugs
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Summary|internal compiler error: in |[4.5 Regression] internal
|propagate_necessity, at |compiler error: in
|tree-ssa-dce.c:754 |propagate_necessity, at
| |tree-ssa-dce.c:754
Target Milestone|--- |4.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39804
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/39804] [4.5 Regression] internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754
2009-04-18 9:51 [Bug tree-optimization/39804] New: internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754 segher at kernel dot crashing dot org
` (3 preceding siblings ...)
2009-04-18 10:06 ` [Bug tree-optimization/39804] [4.5 Regression] " rguenth at gcc dot gnu dot org
@ 2009-04-18 10:22 ` rguenth at gcc dot gnu dot org
2009-04-18 13:02 ` rguenth at gcc dot gnu dot org
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-04-18 10:22 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from rguenth at gcc dot gnu dot org 2009-04-18 10:22 -------
typedef unsigned char u8;
struct __large_struct { unsigned long buf[100]; };
static inline __attribute__((always_inline)) unsigned long
__copy_from_user_inatomic(void *to, const void *from, unsigned long n)
{
unsigned long ret = 0;
asm volatile("1: mov""b"" %2,%""b""1\n" "2:\n"
".section .fixup,\"ax\"\n"
"3: mov %3,%0\n"
" xor""b"" %""b""1,%""b""1\n"
" jmp 2b\n"
".previous\n"
" .section __ex_table,\"a\"\n"
" " ".balign 4" " " "\n"
" " ".long" " " "1b" "," "3b" "\n"
" .previous\n"
: "=r" (ret), "=q"(*(u8 *)to)
: "m" ((*(struct __large_struct *)(from))), "i" (1), "0" (ret));
return ret;
}
int romchecksum(const unsigned char *rom, unsigned char c)
{
unsigned char sum;
for (sum = 0;
!__copy_from_user_inatomic(&(c), ( typeof(c) *)(rom++), sizeof(c));)
sum += c;
}
Likely some missed corner-case in walking address-taken operations in asms.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39804
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/39804] [4.5 Regression] internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754
2009-04-18 9:51 [Bug tree-optimization/39804] New: internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754 segher at kernel dot crashing dot org
` (4 preceding siblings ...)
2009-04-18 10:22 ` rguenth at gcc dot gnu dot org
@ 2009-04-18 13:02 ` rguenth at gcc dot gnu dot org
2009-04-18 13:02 ` rguenth at gcc dot gnu dot org
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-04-18 13:02 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from rguenth at gcc dot gnu dot org 2009-04-18 13:02 -------
Fixed.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39804
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/39804] [4.5 Regression] internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754
2009-04-18 9:51 [Bug tree-optimization/39804] New: internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754 segher at kernel dot crashing dot org
` (5 preceding siblings ...)
2009-04-18 13:02 ` rguenth at gcc dot gnu dot org
@ 2009-04-18 13:02 ` rguenth at gcc dot gnu dot org
2009-04-18 14:55 ` hjl at gcc dot gnu dot org
2009-04-19 19:39 ` segher at kernel dot crashing dot org
8 siblings, 0 replies; 10+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-04-18 13:02 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from rguenth at gcc dot gnu dot org 2009-04-18 13:02 -------
Subject: Bug 39804
Author: rguenth
Date: Sat Apr 18 13:02:00 2009
New Revision: 146314
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=146314
Log:
2009-04-18 Richard Guenther <rguenther@suse.de>
PR middle-end/39804
* tree-ssa-ccp.c (fold_stmt_1): New function factored from ...
(fold_stmt): ... this and ...
(fold_stmt_inplace): ... this.
(fold_stmt_1): Fold references in calls and asms.
* tree-cfg.c (remove_useless_stmts_cond): Use fold_stmt.
* gcc.target/i386/pr39804.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr39804.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-cfg.c
trunk/gcc/tree-ssa-ccp.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39804
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/39804] [4.5 Regression] internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754
2009-04-18 9:51 [Bug tree-optimization/39804] New: internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754 segher at kernel dot crashing dot org
` (6 preceding siblings ...)
2009-04-18 13:02 ` rguenth at gcc dot gnu dot org
@ 2009-04-18 14:55 ` hjl at gcc dot gnu dot org
2009-04-19 19:39 ` segher at kernel dot crashing dot org
8 siblings, 0 replies; 10+ messages in thread
From: hjl at gcc dot gnu dot org @ 2009-04-18 14:55 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from hjl at gcc dot gnu dot org 2009-04-18 14:54 -------
Subject: Bug 39804
Author: hjl
Date: Sat Apr 18 14:54:32 2009
New Revision: 146315
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=146315
Log:
2009-04-18 H.J. Lu <hongjiu.lu@intel.com>
Backport from mainline:
2009-04-18 Richard Guenther <rguenther@suse.de>
PR middle-end/39804
* gcc.target/i386/pr39804.c: New testcase.
Added:
branches/gcc-4_4-branch/gcc/testsuite/gcc.target/i386/pr39804.c
- copied unchanged from r146314,
trunk/gcc/testsuite/gcc.target/i386/pr39804.c
Modified:
branches/gcc-4_4-branch/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39804
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug tree-optimization/39804] [4.5 Regression] internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754
2009-04-18 9:51 [Bug tree-optimization/39804] New: internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754 segher at kernel dot crashing dot org
` (7 preceding siblings ...)
2009-04-18 14:55 ` hjl at gcc dot gnu dot org
@ 2009-04-19 19:39 ` segher at kernel dot crashing dot org
8 siblings, 0 replies; 10+ messages in thread
From: segher at kernel dot crashing dot org @ 2009-04-19 19:39 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from segher at kernel dot crashing dot org 2009-04-19 19:39 -------
> Added:
> branches/gcc-4_4-branch/gcc/testsuite/gcc.target/i386/pr39804.c
Hi hjl,
Why backport a single testcase from trunk to 4.4? This bug never existed
on 4.4, it's not terribly useful as far as I can see.
Also, I didn't see this on gcc-patches.
Segher
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39804
^ permalink raw reply [flat|nested] 10+ messages in thread
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2009-04-18 9:51 [Bug tree-optimization/39804] New: internal compiler error: in propagate_necessity, at tree-ssa-dce.c:754 segher at kernel dot crashing dot org
2009-04-18 9:53 ` [Bug tree-optimization/39804] " segher at kernel dot crashing dot org
2009-04-18 10:03 ` rguenth at gcc dot gnu dot org
2009-04-18 10:05 ` rguenth at gcc dot gnu dot org
2009-04-18 10:06 ` [Bug tree-optimization/39804] [4.5 Regression] " rguenth at gcc dot gnu dot org
2009-04-18 10:22 ` rguenth at gcc dot gnu dot org
2009-04-18 13:02 ` rguenth at gcc dot gnu dot org
2009-04-18 13:02 ` rguenth at gcc dot gnu dot org
2009-04-18 14:55 ` hjl at gcc dot gnu dot org
2009-04-19 19:39 ` segher at kernel dot crashing dot org
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