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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/57105] New: [4.9 Regression] ICE: in add_insn_before_nobb, at emit-rtl.c:3883 with -Os -fselective-scheduling2 -g
Date: Sun, 28 Apr 2013 17:42:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57105

             Bug #: 57105
           Summary: [4.9 Regression] ICE: in add_insn_before_nobb, at
                    emit-rtl.c:3883 with -Os -fselective-scheduling2 -g
    Classification: Unclassified
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz


Created attachment 29966
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29966
reduced testcase

Compiler output:
$ gcc -Os -fselective-scheduling2 -g testcase.c
testcase.c: In function 'foo':
testcase.c:16:1: internal compiler error: in add_insn_before_nobb, at
emit-rtl.c:3883
 }
 ^
0x758a1f add_insn_before_nobb
        /mnt/svn/gcc-trunk/gcc/emit-rtl.c:3883
0x761441 add_insn_before(rtx_def*, rtx_def*, basic_block_def*)
        /mnt/svn/gcc-trunk/gcc/emit-rtl.c:3945
0x76447e emit_note_before(insn_note, rtx_def*)
        /mnt/svn/gcc-trunk/gcc/emit-rtl.c:4516
0x7a6b44 change_scope
        /mnt/svn/gcc-trunk/gcc/final.c:1591
0x7acef2 reemit_insn_block_notes
        /mnt/svn/gcc-trunk/gcc/final.c:1640
0x7acef2 final_start_function(rtx_def*, _IO_FILE*, int)
        /mnt/svn/gcc-trunk/gcc/final.c:1733
0x7aff25 rest_of_handle_final
        /mnt/svn/gcc-trunk/gcc/final.c:4331
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

$ gcc -v                                       
Using built-in specs.
COLLECT_GCC=/mnt/svn/gcc-trunk/binary-latest/bin/gcc
COLLECT_LTO_WRAPPER=/mnt/svn/gcc-trunk/binary-198366-lto-fortran-checking-yes-rtl-df/libexec/gcc/x86_64-unknown-linux-gnu/4.9.0/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-198366-lto-fortran-checking-yes-rtl-df/
--without-cloog --without-ppl
Thread model: posix
gcc version 4.9.0 20130428 (experimental) (GCC) 

Tested revisions:
r198366 - crash
4.8 r198018 - OK