http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47653
Summary: [4.6 Regression] gcc.c-torture/execute/930614-2.c
FAILs with -fstack-check=generic -fgraphite-identity
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: zso...@seznam.cz
CC: s...@gcc.gnu.org
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 23280
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23280
reduced testcase
Output:
$ gcc -v
Using built-in specs.
COLLECT_GCC=/mnt/svn/gcc-trunk/binary-169929-lto-fortran-checking-yes-rtl-df/bin/gcc
COLLECT_LTO_WRAPPER=/mnt/svn/gcc-trunk/binary-169929-lto-fortran-checking-yes-rtl-df/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/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-169929-lto-fortran-checking-yes-rtl-df/
--with-cloog --with-ppl --with-cloog-include=/usr/include/cloog-ppl/
Thread model: posix
gcc version 4.6.0 20110208 (experimental) (GCC)
$ gcc -O -fstack-check=generic -ftree-pre -fgraphite-identity testcase.c
$ ./a.out
Segmentation fault
Program received signal SIGSEGV, Segmentation fault.
0x0000000000400552 in main () at testcase.c:7
7 x[i][j] = 0;
(gdb) disassemble
0x0000000000400549 <+101>: lea (%rcx,%rax,1),%edx
0x000000000040054c <+104>: movslq %edx,%rdx
0x000000000040054f <+107>: add %rsi,%rdx
=> 0x0000000000400552 <+110>: movl $0x0,(%r8,%rdx,4)
0x000000000040055a <+118>: add $0x1,%rax
0x000000000040055e <+122>: lea -0x1(%rax),%rdx
0x0000000000400562 <+126>: cmp %rdi,%rdx
0x0000000000400565 <+129>: jl 0x400549 <main+101>
Tested revisions:
r169929 - fail
4.5.2 - OK
