[Bug middle-end/54759] New: [4.8 regression] segfault for gcc.dg/vect/pr49093.c on Solaris

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54759



             Bug #: 54759

           Summary: [4.8 regression] segfault for gcc.dg/vect/pr49093.c on

                    Solaris

    Classification: Unclassified

           Product: gcc

           Version: 4.8.0

            Status: UNCONFIRMED

          Severity: normal

          Priority: P3

         Component: middle-end

        AssignedTo: unassig...@gcc.gnu.org

        ReportedBy: ebotca...@gcc.gnu.org

                CC: de...@gcc.gnu.org

              Host: sparc-sun-solaris2.10

            Target: sparc-sun-solaris2.10

             Build: sparc-sun-solaris2.10





We have a segfault for gcc.dg/vect/pr49093.c on SPARC/Solaris:



Program received signal SIGSEGV, Segmentation fault.

[Switching to Thread 1 (LWP 1)]

0xff0ae9b0 in strlen () from /lib/libc.so.1

(gdb) bt

#0  0xff0ae9b0 in strlen () from /lib/libc.so.1

#1  0xff1134d8 in _ndoprnt () from /lib/libc.so.1

#2  0xff1154a0 in fprintf () from /lib/libc.so.1

#3  0x00743778 in vectorize_loops ()

    at /nile.build/botcazou/gcc-head/src/gcc/tree-vectorizer.c:198

#4  0x0067739c in tree_vectorize ()

    at /nile.build/botcazou/gcc-head/src/gcc/tree-ssa-loop.c:215



(gdb) frame 3

#3  0x00743778 in vectorize_loops ()

    at /nile.build/botcazou/gcc-head/src/gcc/tree-vectorizer.c:198

198                 LOC_FILE (vect_location), LOC_LINE (vect_location));

(gdb) list

193     

194             vect_location = find_loop_location (loop);

195             if (vect_location != UNKNOWN_LOC

196                 && vect_verbosity_level > REPORT_NONE)

197               fprintf (vect_dump, "\nAnalyzing loop at %s:%d\n",

198                 LOC_FILE (vect_location), LOC_LINE (vect_location));

199     

200             loop_vinfo = vect_analyze_loop (loop);

201             loop->aux = loop_vinfo;

202     

(gdb) p vect_location 

$1 = 2147483648

(gdb) call expand_location(vect_location)

$4 = {file = 0x0, line = 0, column = 0, data = 0xfb4a5ad0, sysp = false}



This is reproducible with a bare cross-compiler on x86_64-suse-linux:



gdb --args gcc/cc1 -quiet -O1 -ftree-vectorize -fdump-tree-vect-details

-fno-tree-fre -mcpu=v9 pr49093.c



(gdb) b tree-vectorizer.c:197



Breakpoint 1, vectorize_loops ()

    at /home/eric/svn/gcc/gcc/tree-vectorizer.c:198

198                 LOC_FILE (vect_location), LOC_LINE (vect_location));

(gdb) call expand_location(vect_location)

$4 = {file = 0x0, line = 0, column = 0, data = 0x7ffff68dfaa0, sysp = false}