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* [Bug rtl-optimization/57379] New: [4.9 Regression]: Segfault in invalidate_any_buried_refs (x=0x0) at ../../gcc-svn/trunk/gcc/gcse.c:3850
@ 2013-05-22 19:42 ubizjak at gmail dot com
2013-05-22 22:11 ` [Bug target/57379] " ubizjak at gmail dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: ubizjak at gmail dot com @ 2013-05-22 19:42 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57379
Bug ID: 57379
Summary: [4.9 Regression]: Segfault in
invalidate_any_buried_refs (x=0x0) at
../../gcc-svn/trunk/gcc/gcse.c:3850
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ubizjak at gmail dot com
Target: alpha-linux-gnu
Created attachment 30167
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30167&action=edit
Preprocessed source
This is recent regression.
The segfault can be triggered with crosscompiler to alpha-linux-gnu, configured
with:
"../gcc-svn/trunk/configure --target=alpha-linux-gnu --with-long-double-128"
$ ~/gcc-build-alpha/gcc/cc1 -O2 -fpreprocessed -quiet libgcc2.i -o libgcc2.s
../../../gcc-svn/trunk/libgcc/libgcc2.c: In function ‘__multc3’:
../../../gcc-svn/trunk/libgcc/libgcc2.c:1927:1: internal compiler error:
Segmentation fault
0x8a5c0f crash_signal
../../gcc-svn/trunk/gcc/toplev.c:333
0x6fa870 invalidate_any_buried_refs
../../gcc-svn/trunk/gcc/gcse.c:3850
0x6fa924 invalidate_any_buried_refs
../../gcc-svn/trunk/gcc/gcse.c:3862
0x6fa924 invalidate_any_buried_refs
../../gcc-svn/trunk/gcc/gcse.c:3862
gdb session:
(gdb) r
Starting program: /home/uros/gcc-build-alpha/gcc/cc1 -O2 -fpreprocessed -quiet
libgcc2.i -o libgcc2.s
Program received signal SIGSEGV, Segmentation fault.
invalidate_any_buried_refs (x=0x0) at ../../gcc-svn/trunk/gcc/gcse.c:3850
3850 if (MEM_P (x) && simple_mem (x))
(gdb) b
#0 invalidate_any_buried_refs (x=0x0) at ../../gcc-svn/trunk/gcc/gcse.c:3850
#1 0x00000000006fa925 in invalidate_any_buried_refs (x=0x7ffff1884690) at
../../gcc-svn/trunk/gcc/gcse.c:3862
#2 0x00000000006fa925 in invalidate_any_buried_refs (x=0x7ffff1884678) at
../../gcc-svn/trunk/gcc/gcse.c:3862
#3 0x00000000006fa925 in invalidate_any_buried_refs (x=x@entry=0x7ffff1884660)
at ../../gcc-svn/trunk/gcc/gcse.c:3862
#4 0x00000000006fb4c2 in compute_ld_motion_mems () at
../../gcc-svn/trunk/gcc/gcse.c:3922
#5 one_pre_gcse_pass () at ../../gcc-svn/trunk/gcc/gcse.c:2679
#6 execute_rtl_pre () at ../../gcc-svn/trunk/gcc/gcse.c:4119
#7 0x00000000008033f0 in execute_one_pass (pass=pass@entry=0x10765c0
<pass_rtl_pre>) at ../../gcc-svn/trunk/gcc/passes.c:2337
#8 0x0000000000803855 in execute_pass_list (pass=0x10765c0 <pass_rtl_pre>) at
../../gcc-svn/trunk/gcc/passes.c:2389
...
(gdb) f 1
#1 0x00000000006fa925 in invalidate_any_buried_refs (x=0x7ffff1884690) at
../../gcc-svn/trunk/gcc/gcse.c:3862
3862 invalidate_any_buried_refs (XEXP (x, i));
(gdb) p debug_rtx (x)
(expr_list:REG_DEP_TRUE (reg/v:TF 70 [ x ])
(nil))
$1 = void
(gdb) f 4
#4 0x00000000006fb4c2 in compute_ld_motion_mems () at
../../gcc-svn/trunk/gcc/gcse.c:3922
3922 invalidate_any_buried_refs (src_eq);
(gdb) p debug_rtx (src_eq)
(expr_list:REG_DEP_TRUE (symbol_ref:DI ("_OtsEqlX") [flags 0x41])
(expr_list:REG_DEP_TRUE (reg/v:TF 70 [ x ])
(expr_list:REG_DEP_TRUE (reg/v:TF 70 [ x ])
(nil))))
$2 = void
(gdb) p debug_rtx (insn)
(insn 65 64 66 2 (set (reg:DI 148)
(reg:DI 0 $0)) ../../../gcc-svn/trunk/libgcc/libgcc2.c:1882 226
{*movdi}
(expr_list:REG_DEAD (reg:DI 0 $0)
(expr_list:REG_EQUAL (expr_list:REG_DEP_TRUE (symbol_ref:DI
("_OtsEqlX") [flags 0x41])
(expr_list:REG_DEP_TRUE (reg/v:TF 70 [ x ])
(expr_list:REG_DEP_TRUE (reg/v:TF 70 [ x ])
(nil))))
(nil))))
$3 = void
It looks like recursion doesn't check for NULL_RTX when processing expr_list.
>From gcc-bugs-return-422920-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 22 20:17:49 2013
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From: "fabien at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/37140] type inherited from base class not recognized
Date: Wed, 22 May 2013 20:17:00 -0000
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fabien at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |fabien at gcc dot gnu.org
--- Comment #5 from fabien at gcc dot gnu.org ---
(In reply to Paolo Carlini from comment #4)
> PR14258 is fixed and this is still rejected. Maybe Fabien wants to have a
> look?!?
Sure, I'll have a look. Thank you Paolo!
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/57379] [4.9 Regression]: Segfault in invalidate_any_buried_refs (x=0x0) at ../../gcc-svn/trunk/gcc/gcse.c:3850
2013-05-22 19:42 [Bug rtl-optimization/57379] New: [4.9 Regression]: Segfault in invalidate_any_buried_refs (x=0x0) at ../../gcc-svn/trunk/gcc/gcse.c:3850 ubizjak at gmail dot com
@ 2013-05-22 22:11 ` ubizjak at gmail dot com
2013-05-23 8:41 ` rguenth at gcc dot gnu.org
2013-06-10 18:46 ` ubizjak at gmail dot com
2 siblings, 0 replies; 4+ messages in thread
From: ubizjak at gmail dot com @ 2013-05-22 22:11 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57379
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|rtl-optimization |target
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Target issue, a very strange equal note is attached to the result of TFmode
xfloating compare.
I am testing following patch:
--cut here--
Index: alpha.c
===================================================================
--- alpha.c (revision 199214)
+++ alpha.c (working copy)
@@ -3067,12 +3067,8 @@ alpha_emit_xfloating_compare (enum rtx_code *pcode
operands[1] = op1;
out = gen_reg_rtx (DImode);
- /* What's actually returned is -1,0,1, not a proper boolean value,
- so use an EXPR_LIST as with a generic libcall instead of a
- comparison type expression. */
- note = gen_rtx_EXPR_LIST (VOIDmode, op1, NULL_RTX);
- note = gen_rtx_EXPR_LIST (VOIDmode, op0, note);
- note = gen_rtx_EXPR_LIST (VOIDmode, func, note);
+ /* What's actually returned is -1,0,1, not a proper boolean value. */
+ note = gen_rtx_UNSPEC (DImode, gen_rtvec (2, op0, op1), UNSPEC_COMPARE);
alpha_emit_xfloating_libcall (func, out, operands, 2, note);
return out;
Index: alpha.md
===================================================================
--- alpha.md (revision 199214)
+++ alpha.md (working copy)
@@ -23,6 +23,7 @@
;; Uses of UNSPEC in this file:
(define_c_enum "unspec" [
+ UNSPEC_COMPARE
UNSPEC_ARG_HOME
UNSPEC_LDGP1
UNSPEC_INSXH
--cut here--
>From gcc-bugs-return-422929-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 22 22:46:54 2013
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/57352] internal compiler error in cp_parser_abort_tentative_parse at cp/parser.c:22878
Date: Wed, 22 May 2013 22:46:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |4.9.0
--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed for 4.9.0.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/57379] [4.9 Regression]: Segfault in invalidate_any_buried_refs (x=0x0) at ../../gcc-svn/trunk/gcc/gcse.c:3850
2013-05-22 19:42 [Bug rtl-optimization/57379] New: [4.9 Regression]: Segfault in invalidate_any_buried_refs (x=0x0) at ../../gcc-svn/trunk/gcc/gcse.c:3850 ubizjak at gmail dot com
2013-05-22 22:11 ` [Bug target/57379] " ubizjak at gmail dot com
@ 2013-05-23 8:41 ` rguenth at gcc dot gnu.org
2013-06-10 18:46 ` ubizjak at gmail dot com
2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-05-23 8:41 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57379
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.9.0
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/57379] [4.9 Regression]: Segfault in invalidate_any_buried_refs (x=0x0) at ../../gcc-svn/trunk/gcc/gcse.c:3850
2013-05-22 19:42 [Bug rtl-optimization/57379] New: [4.9 Regression]: Segfault in invalidate_any_buried_refs (x=0x0) at ../../gcc-svn/trunk/gcc/gcse.c:3850 ubizjak at gmail dot com
2013-05-22 22:11 ` [Bug target/57379] " ubizjak at gmail dot com
2013-05-23 8:41 ` rguenth at gcc dot gnu.org
@ 2013-06-10 18:46 ` ubizjak at gmail dot com
2 siblings, 0 replies; 4+ messages in thread
From: ubizjak at gmail dot com @ 2013-06-10 18:46 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57379
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Target Milestone|4.9.0 |4.7.4
--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed in mainline and backported to 4.8.1 and 4.7.4 branches.
>From gcc-bugs-return-424128-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 10 18:52:10 2013
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From: "anass.lasram at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/57575] lvalue function accepted as an rvalue
Date: Mon, 10 Jun 2013 18:52:00 -0000
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Anass Lasram <anass.lasram at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Anass Lasram <anass.lasram at gmail dot com> ---
(In reply to Daniel Krügler from comment #1)
> Your assumptions are mistaken. In C++ it is valid to bind a function value
> to an rvalue reference of that function type. It is only so, that binding to
> an lvalue reference is preferred.
>
> In other words, the following is valid as well:
>
> float f() { return 0.f; }
> float (&&r)(void) = f;
>
> See for example [over.ics.ref] p3 (emphasis mine):
>
> "Except for an implicit object parameter, for which see 13.3.1, a standard
> conversion sequence cannot be formed if it requires [..] binding an rvalue
> reference to an lvalue **other than a function lvalue**."
Thanks Daniel for the rectification.
>From gcc-bugs-return-424129-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 10 19:19:51 2013
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From: "drussel at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/57580] New: Repeated _Pragma message directives in macro causes problems
Date: Mon, 10 Jun 2013 19:19:00 -0000
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Bug ID: 57580
Summary: Repeated _Pragma message directives in macro causes
problems
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: drussel at gmail dot com
Input:
#define BROKEN \
_Pragma("message(\"message0\")") \
_Pragma("message(\"message1\")")
BROKEN
Output:
gcc -c test.cpp
test.cpp:5:2: error: stray ‘#’ in program
test.cpp:5:27: note: #pragma message: message0
test.cpp:5:3: error: ‘pragma’ does not name a type
gcc 4.6.3 and clang are both happy with the code.
>From gcc-bugs-return-424130-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jun 10 19:34:21 2013
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug regression/57551] [4.9 Regression]: g++.dg/ext/visibility/anon6.C scan-assembler 1BIiE1cE
Date: Mon, 10 Jun 2013 19:34:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|jason at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Reassigning since Honza has been working on this.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2013-05-22 19:42 [Bug rtl-optimization/57379] New: [4.9 Regression]: Segfault in invalidate_any_buried_refs (x=0x0) at ../../gcc-svn/trunk/gcc/gcse.c:3850 ubizjak at gmail dot com
2013-05-22 22:11 ` [Bug target/57379] " ubizjak at gmail dot com
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This is a public inbox, see mirroring instructions
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as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).