Seeing a segfault trying to build 164.gzip from cpu2000. Noticed it with -O3,
but also occurs for "-O2/-O1 -ftree-vectorize".
run/00000001> cat junk.c
typedef unsigned short ush;
extern ush prev[];
void fill_window()
{
register unsigned n, m;
for (n = 0; n < 32768; n++) {
m = prev[n];
prev[n] = (ush)(m >= 0x8000 ? m-0x8000 : 0);
}
}
run/00000001> /home/pthaugen/install/gcc/trunk/bin/gcc -c -m32 -O3 junk.c
junk.c: In function 'fill_window':
junk.c:4: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Program received signal SIGSEGV, Segmentation fault.
vectorizable_operation (stmt=0xf7f69860, bsi=0x0, vec_stmt=0x0, slp_node=0x0)
at /home/pthaugen/src/gcc/trunk/gcc/gcc/tree-vect-transform.c:3807
3807 nunits_out = TYPE_VECTOR_SUBPARTS (vectype_out);
(gdb) bt 5
#0 vectorizable_operation (stmt=0xf7f69860, bsi=0x0, vec_stmt=0x0,
slp_node=0x0)
at /home/pthaugen/src/gcc/trunk/gcc/gcc/tree-vect-transform.c:3807
#1 0x106efc68 in vect_analyze_operations (loop_vinfo=0x109d8d20)
at /home/pthaugen/src/gcc/trunk/gcc/gcc/tree-vect-analyze.c:484
#2 0x106f7060 in vect_analyze_loop (loop=0xf7ec43f0)
at /home/pthaugen/src/gcc/trunk/gcc/gcc/tree-vect-analyze.c:4341
#3 0x104d010c in vectorize_loops ()
at /home/pthaugen/src/gcc/trunk/gcc/gcc/tree-vectorizer.c:2501
#4 0x1045e000 in tree_vectorize ()
at /home/pthaugen/src/gcc/trunk/gcc/gcc/tree-ssa-loop.c:216
(More stack frames follow...)
--
Summary: Segfault in vectorizable_operation
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pthaugen at gcc dot gnu dot org
GCC build triplet: powerpc64-linux
GCC host triplet: powerpc64-linux
GCC target triplet: powerpc64-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33742
