http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47001
Summary: segmentation fault in vect_mark_slp_stmts
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: dcb...@hotmail.com
Created attachment 22808
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22808
C source code
I just tried to compile package groonga-1.0.3 with the latest 4.6
snapshot 20101211 on a Fedora Linux box. The compiler said
io.c: In function 'grn_io_open':
io.c:402:12: warning: variable 'flags' set but not used
[-Wunused-but-set-variable]
io.c:397:1: 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.
valgrind says
==8475== Invalid read of size 4
==8475== at 0x92FA3D: vect_mark_slp_stmts (tree-vect-slp.c:2597)
==8475== by 0x932443: vect_make_slp_decision (tree-vect-slp.c:1347)
==8475== by 0x928F80: vect_analyze_loop (tree-vect-loop.c:1497)
==8475== by 0x935647: vectorize_loops (tree-vectorizer.c:199)
==8475== by 0x74510E: execute_one_pass (passes.c:1553)
==8475== by 0x7453B4: execute_pass_list (passes.c:1608)
==8475== by 0x7453C6: execute_pass_list (passes.c:1609)
==8475== by 0x7453C6: execute_pass_list (passes.c:1609)
==8475== by 0x838CD5: tree_rest_of_compilation (tree-optimize.c:422)
==8475== by 0x9D6540: cgraph_expand_function (cgraphunit.c:1508)
==8475== by 0x9D8AA9: cgraph_optimize (cgraphunit.c:1567)
==8475== by 0x9D9019: cgraph_finalize_compilation_unit (cgraphunit.c:1031)
==8475== Address 0x4 is not stack'd, malloc'd or (recently) free'd
==8475==
Source code attached. Flag -O3 required.
