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: [email protected]
ReportedBy: [email protected]
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)
