http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48443
Summary: ICE: verify_flow_info failed: control flow in the
middle of basic block with -fprefetch-loop-arrays
--param l2-cache-size=0 and setjmp()
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: zso...@seznam.cz
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 23875
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23875
reduced testcase
Compiler output:
$ gcc -O -fprefetch-loop-arrays -fstrict-overflow -ftree-vectorize --param
l2-cache-size=0 testcase.c
testcase.c: In function 'foo':
testcase.c:3:6: error: control flow in the middle of basic block 10
testcase.c:3:6: error: control flow in the middle of basic block 10
testcase.c:3:6: internal compiler error: verify_flow_info failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
(gdb) bt
#0 error (gmsgid=0x1178ef8 "control flow in the middle of basic block %d") at
/mnt/svn/gcc-trunk/gcc/diagnostic.c:747
#1 0x00000000008e98d3 in gimple_verify_flow_info () at
/mnt/svn/gcc-trunk/gcc/tree-cfg.c:4464
#2 0x00000000005e6374 in verify_flow_info () at
/mnt/svn/gcc-trunk/gcc/cfghooks.c:257
#3 0x00000000009aee9a in tree_transform_and_unroll_loop (loop=0x7ffff7ed0a18,
factor=4, exit=0x7ffff59983c0, desc=Unhandled dwarf expression opcode 0xf3
)
at /mnt/svn/gcc-trunk/gcc/tree-ssa-loop-manip.c:1098
#4 0x000000000105d709 in loop_prefetch_arrays () at
/mnt/svn/gcc-trunk/gcc/tree-ssa-loop-prefetch.c:1862
#5 tree_ssa_prefetch_arrays () at
/mnt/svn/gcc-trunk/gcc/tree-ssa-loop-prefetch.c:1933
#6 0x00000000007efd46 in execute_one_pass (pass=0x164b520) at
/mnt/svn/gcc-trunk/gcc/passes.c:1555
#7 0x00000000007f0035 in execute_pass_list (pass=0x164b520) at
/mnt/svn/gcc-trunk/gcc/passes.c:1610
#8 0x00000000007f0047 in execute_pass_list (pass=0x164bac0) at
/mnt/svn/gcc-trunk/gcc/passes.c:1611
#9 0x00000000007f0047 in execute_pass_list (pass=0x164ad40) at
/mnt/svn/gcc-trunk/gcc/passes.c:1611
#10 0x0000000000934d15 in tree_rest_of_compilation (fndecl=0x7ffff5977f00) at
/mnt/svn/gcc-trunk/gcc/tree-optimize.c:422
#11 0x0000000000b01337 in cgraph_expand_function (node=0x7ffff5997000) at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1580
#12 0x0000000000b03a8c in cgraph_expand_all_functions () at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1639
#13 cgraph_optimize () at /mnt/svn/gcc-trunk/gcc/cgraphunit.c:1903
#14 0x0000000000b0401a in cgraph_finalize_compilation_unit () at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1100
#15 0x0000000000509094 in c_write_global_declarations () at
/mnt/svn/gcc-trunk/gcc/c-decl.c:9879
#16 0x00000000008dd94d in compile_file (argc=18, argv=0x7fffffffdbf8) at
/mnt/svn/gcc-trunk/gcc/toplev.c:591
Tested revisions:
r171948 - crash
4.6 r171597 - crash
4.5 r171597 - OK
4.4 r171597 - crash
