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* [Bug middle-end/57661] New: [4.9 Regression] ICE: SIGSEGV in verify_ssa
@ 2013-06-20 13:37 zsojka at seznam dot cz
2013-06-24 11:09 ` [Bug middle-end/57661] " rguenth at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: zsojka at seznam dot cz @ 2013-06-20 13:37 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57661
Bug ID: 57661
Summary: [4.9 Regression] ICE: SIGSEGV in verify_ssa
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Created attachment 30326
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30326&action=edit
partially reduced testcase
Compiler output:
$ gcc -O2 -fno-tree-forwprop -std=gnu++0x testcase.C
testcase.C: In destructor '_Rope_RopeFunction<_CharT,
_Alloc>::~_Rope_RopeFunction() [with _CharT = char; _Alloc = allocator<char>]':
testcase.C:54:5: internal compiler error: Segmentation fault
~_Rope_RopeFunction () throw ()
^
0xbe9c8f crash_signal
/mnt/svn/gcc-trunk/gcc/toplev.c:333
0xd6b5f0 verify_ssa(bool)
/mnt/svn/gcc-trunk/gcc/tree-ssa.c:938
0xafc281 execute_function_todo
/mnt/svn/gcc-trunk/gcc/passes.c:1970
0xafcbe7 execute_todo
/mnt/svn/gcc-trunk/gcc/passes.c:2002
0xafe8e1 execute_one_ipa_transform_pass
/mnt/svn/gcc-trunk/gcc/passes.c:2185
0xafe8e1 execute_all_ipa_transforms()
/mnt/svn/gcc-trunk/gcc/passes.c:2215
0x874a38 expand_function
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1584
0x8766f6 expand_all_functions
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1695
0x8766f6 compile()
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:2029
0x876cc9 finalize_compilation_unit()
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:2106
0x685d60 cp_write_global_declarations()
/mnt/svn/gcc-trunk/gcc/cp/decl2.c:4356
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$ gcc -v
Using built-in specs.
COLLECT_GCC=/mnt/svn/gcc-trunk/binary-latest/bin/gcc
COLLECT_LTO_WRAPPER=/mnt/svn/gcc-trunk/binary-200224-lto-fortran-checking-yes-rtl-df/libexec/gcc/x86_64-unknown-linux-gnu/4.9.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /mnt/svn/gcc-trunk//configure --enable-checking=yes,rtl,df
--enable-languages=c,c++,lto,fortran
--prefix=/mnt/svn/gcc-trunk/binary-200224-lto-fortran-checking-yes-rtl-df/
--without-cloog --without-ppl
Thread model: posix
gcc version 4.9.0 20130619 (experimental) (GCC)
Tested revisions:
r200224 - crash
4.8 r198018 - OK
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/57661] [4.9 Regression] ICE: SIGSEGV in verify_ssa
2013-06-20 13:37 [Bug middle-end/57661] New: [4.9 Regression] ICE: SIGSEGV in verify_ssa zsojka at seznam dot cz
@ 2013-06-24 11:09 ` rguenth at gcc dot gnu.org
2013-07-12 1:50 ` mpolacek at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-06-24 11:09 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57661
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2013-06-24
Target Milestone|--- |4.9.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed, we are missing the SSA_NAME_DEF_STMT for _18.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/57661] [4.9 Regression] ICE: SIGSEGV in verify_ssa
2013-06-20 13:37 [Bug middle-end/57661] New: [4.9 Regression] ICE: SIGSEGV in verify_ssa zsojka at seznam dot cz
2013-06-24 11:09 ` [Bug middle-end/57661] " rguenth at gcc dot gnu.org
@ 2013-07-12 1:50 ` mpolacek at gcc dot gnu.org
2013-07-22 22:03 ` jakub at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2013-07-12 1:50 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57661
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Probably something in the inliner; -fno-inline prevents the ICE.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/57661] [4.9 Regression] ICE: SIGSEGV in verify_ssa
2013-06-20 13:37 [Bug middle-end/57661] New: [4.9 Regression] ICE: SIGSEGV in verify_ssa zsojka at seznam dot cz
2013-06-24 11:09 ` [Bug middle-end/57661] " rguenth at gcc dot gnu.org
2013-07-12 1:50 ` mpolacek at gcc dot gnu.org
@ 2013-07-22 22:03 ` jakub at gcc dot gnu.org
2013-07-22 22:36 ` jakub at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2013-07-22 22:03 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57661
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yeah, ipa-split.c together with MEM_REF gimple_clobber_p and anonymous SSA_NAME
cause this.
ipa-split intentionally ignores clobber stmts during analysis, because they
aren't real stmts, worst case we just ignore them and/or throw them away.
If a clobber has a decl on lhs, then the decl is always present and not a
problem. If it is a MEM_REF clobber with non-anonymous SSA_NAME, it is also
just fine, ipa-split will during the cloning of the fn to *.part.* turn those
SSA_NAMEs into SSA_NAME_IS_DEFAULT_DEF ones, and then tree-ssa-live will throw
such clobbers away as useless. But anonymous SSA_NAMEs aren't meant to be ever
SSA_NAME_IS_DEFAULT_DEF, which causes this problem.
Perhaps ipa-split should just fix such SSA_NAMEs up (look up what anonymous
SSA_NAMEs have no SSA_NAME_DEFAULT_STMT and remove all clobbers that depend on
those and remove those SSA_NAMEs?
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/57661] [4.9 Regression] ICE: SIGSEGV in verify_ssa
2013-06-20 13:37 [Bug middle-end/57661] New: [4.9 Regression] ICE: SIGSEGV in verify_ssa zsojka at seznam dot cz
` (2 preceding siblings ...)
2013-07-22 22:03 ` jakub at gcc dot gnu.org
@ 2013-07-22 22:36 ` jakub at gcc dot gnu.org
2013-07-22 23:50 ` jakub at gcc dot gnu.org
2013-08-13 19:58 ` jakub at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2013-07-22 22:36 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57661
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Perhaps if copy_cfg_body saved a pointer to the blocks_to_copy bitmap
temporarily into a new field in *id, the copying of clobber stmts could check
if for MEM_REF clobbers the SSA_NAME mentioned there has a definition in a
block not listed in blocks_to_copy and in that case instead of copying over the
clobber stmt just throw it on the floor.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/57661] [4.9 Regression] ICE: SIGSEGV in verify_ssa
2013-06-20 13:37 [Bug middle-end/57661] New: [4.9 Regression] ICE: SIGSEGV in verify_ssa zsojka at seznam dot cz
` (3 preceding siblings ...)
2013-07-22 22:36 ` jakub at gcc dot gnu.org
@ 2013-07-22 23:50 ` jakub at gcc dot gnu.org
2013-08-13 19:58 ` jakub at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2013-07-22 23:50 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57661
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 30537
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30537&action=edit
gcc49-pr57661.patch
Untested fix.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/57661] [4.9 Regression] ICE: SIGSEGV in verify_ssa
2013-06-20 13:37 [Bug middle-end/57661] New: [4.9 Regression] ICE: SIGSEGV in verify_ssa zsojka at seznam dot cz
` (4 preceding siblings ...)
2013-07-22 23:50 ` jakub at gcc dot gnu.org
@ 2013-08-13 19:58 ` jakub at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2013-08-13 19:58 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57661
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Aug 13 17:06:13 2013
New Revision: 201698
URL: http://gcc.gnu.org/viewcvs?rev=201698&root=gcc&view=rev
Log:
PR tree-optimization/57661
* tree-inline.h (struct copy_body_data): Add blocks_to_copy field.
* tree-inline.c (tree_function_versioning): Initialize it.
(remap_gimple_stmt): Return GIMPLE_NOP for MEM_REF lhs clobber stmts
if id->blocks_to_copy and MEM_REF's SSA_NAME is defined in a block
that is not being copied.
* g++.dg/opt/pr57661.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/opt/pr57661.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-inline.c
trunk/gcc/tree-inline.h
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2013-08-13 19:58 UTC | newest]
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2013-06-20 13:37 [Bug middle-end/57661] New: [4.9 Regression] ICE: SIGSEGV in verify_ssa zsojka at seznam dot cz
2013-06-24 11:09 ` [Bug middle-end/57661] " rguenth at gcc dot gnu.org
2013-07-12 1:50 ` mpolacek at gcc dot gnu.org
2013-07-22 22:03 ` jakub at gcc dot gnu.org
2013-07-22 22:36 ` jakub at gcc dot gnu.org
2013-07-22 23:50 ` jakub at gcc dot gnu.org
2013-08-13 19:58 ` jakub at gcc dot gnu.org
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