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* [Bug rtl-optimization/52004] New: bad asm generated with -O2 -finline-functions (and maybe -ftracer)
@ 2012-01-26 0:51 marbacz at gmail dot com
2012-01-26 1:02 ` [Bug rtl-optimization/52004] " marbacz at gmail dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: marbacz at gmail dot com @ 2012-01-26 0:51 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52004
Bug #: 52004
Summary: bad asm generated with -O2 -finline-functions (and
maybe -ftracer)
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: marbacz@gmail.com
Created attachment 26469
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26469
Test case from GDB.
Compiling attached file (from GDB 7.4) generates assembly that chokes the
assembler. I'm attaching original and reduced testcases. I'm not sure whether
the reduced one is still valid C but on that one you don't need -ftracer (-O2
-finline-functions is enough for the assembler to fail).
gcc -O2 -finline-functions -ftracer -c linux-x86-low.c
linux-x86-low.c: Assembler messages:
linux-x86-low.c:2570: Error: symbol `start_i386_reg_a' is already defined
linux-x86-low.c:2572: Error: symbol `end_i386_reg_a' is already defined
linux-x86-low.c:2579: Error: symbol `start_i386_reg_b' is already defined
linux-x86-low.c:2583: Error: symbol `end_i386_reg_b' is already defined
linux-x86-low.c:2584: Error: symbol `start_i386_reg_c' is already defined
linux-x86-low.c:2587: Error: symbol `end_i386_reg_c' is already defined
linux-x86-low.c:2694: Error: symbol `start_i386_void_call_2_a' is already
defined
linux-x86-low.c:2699: Error: symbol `end_i386_void_call_2_a' is already defined
linux-x86-low.c:2715: Error: symbol `start_i386_void_call_2_b' is already
defined
linux-x86-low.c:2718: Error: symbol `end_i386_void_call_2_b' is already defined
linux-x86-low.c:2666: Error: symbol `start_i386_int_call_1_a' is already
defined
linux-x86-low.c:2668: Error: symbol `end_i386_int_call_1_a' is already defined
linux-x86-low.c:2680: Error: symbol `start_i386_int_call_1_c' is already
defined
linux-x86-low.c:2683: Error: symbol `end_i386_int_call_1_c' is already defined
linux-x86-low.c:2081: Error: symbol `start_amd64_void_call_2_b' is already
defined
linux-x86-low.c:2082: Error: symbol `end_amd64_void_call_2_b' is already
defined
linux-x86-low.c:2075: Error: symbol `start_amd64_void_call_2_a' is already
defined
linux-x86-low.c:2077: Error: symbol `end_amd64_void_call_2_a' is already
defined
~ # gcc -v
Using built-in specs.
COLLECT_GCC=/usr/x86_64-pc-linux-gnu/gcc-bin/4.7.0-svn-183541-20120125/gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/4.7.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.7.0-svn-183541-20120125
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.0-svn-183541-20120125/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.7.0-svn-183541-20120125
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.7.0-svn-183541-20120125/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.7.0-svn-183541-20120125/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.0-svn-183541-20120125/include/g++-v4
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --disable-altivec
--disable-fixed-point --with-ppl --with-cloog --disable-ppl-version-check
--with-cloog-include=/usr/include/cloog-ppl --enable-lto --enable-nls
--without-included-gettext --with-system-zlib --disable-werror
--enable-secureplt --disable-multilib --enable-libmudflap --enable-libssp
--enable-libgomp
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/4.7.0-svn-183541-20120125/python
--enable-checking=assert,fold,gc,misc,rtlflag,runtime,tree --disable-libgcj
--disable-libquadmath --enable-languages=c,c++ --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
--enable-targets=all --with-pkgversion='svn 183541-20120125'
--enable-build-with-cxx
Thread model: posix
gcc version 4.7.0 20120125 (experimental) (svn 183541-20120125)
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/52004] bad asm generated with -O2 -finline-functions (and maybe -ftracer)
2012-01-26 0:51 [Bug rtl-optimization/52004] New: bad asm generated with -O2 -finline-functions (and maybe -ftracer) marbacz at gmail dot com
@ 2012-01-26 1:02 ` marbacz at gmail dot com
2012-01-26 2:50 ` pinskia at gcc dot gnu.org
2012-01-26 3:48 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: marbacz at gmail dot com @ 2012-01-26 1:02 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52004
--- Comment #1 from Marcin Baczynski <marbacz at gmail dot com> 2012-01-26 00:37:21 UTC ---
Created attachment 26470
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26470
Reduced test case.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/52004] bad asm generated with -O2 -finline-functions (and maybe -ftracer)
2012-01-26 0:51 [Bug rtl-optimization/52004] New: bad asm generated with -O2 -finline-functions (and maybe -ftracer) marbacz at gmail dot com
2012-01-26 1:02 ` [Bug rtl-optimization/52004] " marbacz at gmail dot com
@ 2012-01-26 2:50 ` pinskia at gcc dot gnu.org
2012-01-26 3:48 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2012-01-26 2:50 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52004
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-26 00:46:24 UTC ---
inline-asm that contains a label is buggy:
"start_" "amd64_ref1" ":"
*** This bug has been marked as a duplicate of bug 20468 ***
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/52004] bad asm generated with -O2 -finline-functions (and maybe -ftracer)
2012-01-26 0:51 [Bug rtl-optimization/52004] New: bad asm generated with -O2 -finline-functions (and maybe -ftracer) marbacz at gmail dot com
2012-01-26 1:02 ` [Bug rtl-optimization/52004] " marbacz at gmail dot com
2012-01-26 2:50 ` pinskia at gcc dot gnu.org
@ 2012-01-26 3:48 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2012-01-26 3:48 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52004
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-01-26 00:50:40 UTC ---
Those functions should be marked as noinline and noclone or better yet use
toplevel inline-asm for those instructions.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-01-26 0:51 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2012-01-26 0:51 [Bug rtl-optimization/52004] New: bad asm generated with -O2 -finline-functions (and maybe -ftracer) marbacz at gmail dot com
2012-01-26 1:02 ` [Bug rtl-optimization/52004] " marbacz at gmail dot com
2012-01-26 2:50 ` pinskia at gcc dot gnu.org
2012-01-26 3:48 ` pinskia at gcc dot gnu.org
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