http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48880
Summary: regression when performing __builtin_object_size in
deep inline chain
Product: gcc
Version: 4.6.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: bary...@smp.if.uj.edu.pl
Created attachment 24188
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24188
minimized test case
Hi. My first bug report to gcc :)
$ gcc-4.6 -v
Using built-in specs.
COLLECT_GCC=gcc-4.6
COLLECT_LTO_WRAPPER=/usr/lib/gcc/i486-linux-gnu/4.6.1/lto-wrapper
Target: i486-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 4.6.0-6'
--with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++,go --prefix=/usr
--program-suffix=-4.6 --enable-shared --enable-multiarch
--with-multiarch-defaults=i386-linux-gnu --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6
--libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-plugin --enable-objc-gc
--enable-targets=all --with-arch-32=i586 --with-tune=generic
--enable-checking=release --build=i486-linux-gnu --host=i486-linux-gnu
--target=i486-linux-gnu
Thread model: posix
gcc version 4.6.1 20110428 (prerelease) (Debian 4.6.0-6)
linux (2.6.38) kernel fails to compile when using gcc 4.6. It fails on
binfmt_misc.o compilation.
Minimized test case attached (from 780703 bytes, down to 471 bytes, thanks to
delta)
gcc 4.5.3 works without problem.
gcc 4.6.1 gives:
$ gcc-4.6 -O2 -c binfmt_misc_ultramini.i
binfmt_misc_ultramini.i: In function ‘p.part.0’:
binfmt_misc_ultramini.i:8:14: error: call to ‘c_overflow’ declared with
attribute error: c() buffer size is not provably correct
$
Regression dissapear when i use -O3 or -finline-functions optimization. Also
problem disapears when i subtelly change minimized test case. Thus it is
problem with inliner.
Regards,
Witek
