[Bug rtl-optimization/52004] New: bad asm generated with -O2 -finline-functions (and maybe -ftracer)

[marbacz at gmail dot com]

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)