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* [Bug c/42991] New: cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s)
@ 2010-02-07 10:24 dcb314 at hotmail dot com
2010-02-07 10:25 ` [Bug c/42991] " dcb314 at hotmail dot com
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: dcb314 at hotmail dot com @ 2010-02-07 10:24 UTC (permalink / raw)
To: gcc-bugs
I just tried to compile the Linux kernel 2.6.33-rc6 under valgrind
with the C compiler version 4.5 snapshot 20100128 and valgrind said
==17102== Conditional jump or move depends on uninitialised value(s)
==17102== at 0x56D105: expand_debug_expr (cfgexpand.c:2487)
==17102== by 0x56C912: expand_debug_expr (cfgexpand.c:2876)
==17102== by 0x570D54: gimple_expand_cfg (cfgexpand.c:2981)
==17102== by 0x722ECA: execute_one_pass (passes.c:1561)
==17102== by 0x723154: execute_pass_list (passes.c:1616)
==17102== by 0x818C94: tree_rest_of_compilation (tree-optimize.c:413)
==17102== by 0x99A420: cgraph_expand_function (cgraphunit.c:1543)
==17102== by 0x99CE44: cgraph_optimize (cgraphunit.c:1622)
==17102== by 0x99D3A4: cgraph_finalize_compilation_unit (cgraphunit.c:1093)
==17102== by 0x4B0602: c_write_global_declarations (c-decl.c:9537)
==17102== by 0x7C7AFB: toplev_main (toplev.c:1065)
==17102== by 0x6568A7C: (below main) (in /lib64/libc-2.10.1.so)
==17102==
Line 2487 of cfgexpand.c is
if (bitsize == 0)
return NULL;
Preprocessed source code attached. Flags -Os -g required.
--
Summary: cfgexpand.c:2487: Conditional jump or move depends on
uninitialised value(s)
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dcb314 at hotmail dot com
GCC host triplet: x86_64-suse-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42991
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/42991] cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s)
2010-02-07 10:24 [Bug c/42991] New: cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s) dcb314 at hotmail dot com
@ 2010-02-07 10:25 ` dcb314 at hotmail dot com
2010-02-07 10:59 ` [Bug debug/42991] [4.5 Regression] " rguenth at gcc dot gnu dot org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: dcb314 at hotmail dot com @ 2010-02-07 10:25 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from dcb314 at hotmail dot com 2010-02-07 10:25 -------
Created an attachment (id=19817)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19817&action=view)
C source code
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42991
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug debug/42991] [4.5 Regression] cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s)
2010-02-07 10:24 [Bug c/42991] New: cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s) dcb314 at hotmail dot com
2010-02-07 10:25 ` [Bug c/42991] " dcb314 at hotmail dot com
@ 2010-02-07 10:59 ` rguenth at gcc dot gnu dot org
2010-02-07 15:23 ` rguenth at gcc dot gnu dot org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-02-07 10:59 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from rguenth at gcc dot gnu dot org 2010-02-07 10:58 -------
Which means that likely DEBUG_DECLs do not have DECL_SIZE set properly.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aoliva at gcc dot gnu dot
| |org
Keywords| |wrong-debug
Summary|cfgexpand.c:2487: |[4.5 Regression]
|Conditional jump or move |cfgexpand.c:2487:
|depends on uninitialised |Conditional jump or move
|value(s) |depends on uninitialised
| |value(s)
Target Milestone|--- |4.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42991
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug debug/42991] [4.5 Regression] cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s)
2010-02-07 10:24 [Bug c/42991] New: cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s) dcb314 at hotmail dot com
2010-02-07 10:25 ` [Bug c/42991] " dcb314 at hotmail dot com
2010-02-07 10:59 ` [Bug debug/42991] [4.5 Regression] " rguenth at gcc dot gnu dot org
@ 2010-02-07 15:23 ` rguenth at gcc dot gnu dot org
2010-02-07 15:29 ` rguenth at gcc dot gnu dot org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-02-07 15:23 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from rguenth at gcc dot gnu dot org 2010-02-07 15:22 -------
No, this is not really debug-expr related. We have
struct crypto_tfm {
...
void *__crt_ctx[] __attribute__ ((__aligned__(__alignof__(unsigned long
long))));
};
and the FIELD_DECL for __crt_ctx has DECL_SIZE == 0, so get_inner_reference
on a COMPONENT_REF of __crt_ctx will leave us with *pbitsize uninitialized.
I have a patch.
--
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 |2010-02-07 15:22:59
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42991
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug debug/42991] [4.5 Regression] cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s)
2010-02-07 10:24 [Bug c/42991] New: cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s) dcb314 at hotmail dot com
` (2 preceding siblings ...)
2010-02-07 15:23 ` rguenth at gcc dot gnu dot org
@ 2010-02-07 15:29 ` rguenth at gcc dot gnu dot org
2010-02-07 17:18 ` rguenth at gcc dot gnu dot org
2010-02-07 17:19 ` rguenth at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-02-07 15:29 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from rguenth at gcc dot gnu dot org 2010-02-07 15:29 -------
*** Bug 42993 has been marked as a duplicate of this bug. ***
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42991
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug debug/42991] [4.5 Regression] cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s)
2010-02-07 10:24 [Bug c/42991] New: cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s) dcb314 at hotmail dot com
` (3 preceding siblings ...)
2010-02-07 15:29 ` rguenth at gcc dot gnu dot org
@ 2010-02-07 17:18 ` rguenth at gcc dot gnu dot org
2010-02-07 17:19 ` rguenth at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-02-07 17:18 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from rguenth at gcc dot gnu dot org 2010-02-07 17:18 -------
Subject: Bug 42991
Author: rguenth
Date: Sun Feb 7 17:18:22 2010
New Revision: 156575
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=156575
Log:
2010-02-07 Richard Guenther <rguenther@suse.de>
PR middle-end/42991
* expr.c (get_inner_reference): Always initialize *pbitsize.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expr.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42991
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug debug/42991] [4.5 Regression] cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s)
2010-02-07 10:24 [Bug c/42991] New: cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s) dcb314 at hotmail dot com
` (4 preceding siblings ...)
2010-02-07 17:18 ` rguenth at gcc dot gnu dot org
@ 2010-02-07 17:19 ` rguenth at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-02-07 17:19 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from rguenth at gcc dot gnu dot org 2010-02-07 17:18 -------
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=42991
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2010-02-07 17:19 UTC | newest]
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2010-02-07 10:24 [Bug c/42991] New: cfgexpand.c:2487: Conditional jump or move depends on uninitialised value(s) dcb314 at hotmail dot com
2010-02-07 10:25 ` [Bug c/42991] " dcb314 at hotmail dot com
2010-02-07 10:59 ` [Bug debug/42991] [4.5 Regression] " rguenth at gcc dot gnu dot org
2010-02-07 15:23 ` rguenth at gcc dot gnu dot org
2010-02-07 15:29 ` rguenth at gcc dot gnu dot org
2010-02-07 17:18 ` rguenth at gcc dot gnu dot org
2010-02-07 17:19 ` rguenth at gcc dot gnu dot org
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