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: [email protected]
ReportedBy: [email protected]
CC: [email protected]
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.
