http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53185
Bug #: 53185 Summary: segmentation fault in vectorizable_load Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassig...@gcc.gnu.org ReportedBy: g...@intrepid.com CC: ne...@intrepid.com Target: x86_64 Created attachment 27280 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27280 script to demonstrate compiler segfault GCC 4.8 trunk revision r187034 encounters a segfault when compiling the attached test case. This appears to be a relatively recent regression. Here's the back trace. Program received signal SIGSEGV, Segmentation fault. 0x0000000000d93153 in vectorizable_load (stmt=0x7ffff1889460, gsi=0x7fffffffd680, vec_stmt=0x7fffffffd5a0, slp_node=0x0, slp_node_instance=0x0) at gcc/tree-vect-stmts.c:4563 4563 ivstep = fold_build2 (MULT_EXPR, TREE_TYPE (ivstep), ivstep, (gdb) where #0 0x0000000000d93153 in vectorizable_load (stmt=0x7ffff1889460, gsi=0x7fffffffd680, vec_stmt=0x7fffffffd5a0, slp_node=0x0, slp_node_instance=0x0) at gcc/tree-vect-stmts.c:4563 #1 0x0000000000d978e4 in vect_transform_stmt (stmt=0x7ffff1889460, gsi=0x7fffffffd680, grouped_store=0x7fffffffd677 "", slp_node=0x0, slp_node_instance=0x0) at gcc/tree-vect-stmts.c:5639 #2 0x0000000000dac324 in vect_transform_loop (loop_vinfo=0x1cd0630) at gcc/tree-vect-loop.c:5461 #3 0x0000000000dbfd08 in vectorize_loops () at gcc/tree-vectorizer.c:214 #4 0x0000000000cbf6b4 in tree_vectorize () at gcc/tree-ssa-loop.c:218 #5 0x0000000000a22eb0 in execute_one_pass (pass=0x19fdc40) at gcc/passes.c:2181 #6 0x0000000000a23096 in execute_pass_list (pass=0x19fdc40) at gcc/passes.c:2236 #7 0x0000000000a230b7 in execute_pass_list (pass=0x19fda60) at gcc/passes.c:2237 To reproduce, copy the attached do-fail script and gasnet_core.i file to the gcc build directory, and run do-fail. The compiler was configured with --disable-bootstrap --disable-multilib and --enable-checking, however, the failure occurred after a full bootstrap and with various other configure switches as well.