https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78598
Bug ID: 78598
Summary: tree-ssa-loop-prefetch.c:835:16: runtime error: signed
integer overflow
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
Target Milestone: ---
markus@x4 mplayer % cat subassconvert.i
struct bstr {
long len;
} fn1();
struct microdvd_tag {
int key;
int data1;
struct bstr data_string;
} fn2() {
struct microdvd_tag *a;
int i = sizeof "cfshyYpo";
for (;; i--)
switch (a[i].key)
case 'y':
if (a[i].data1)
fn1();
}
markus@x4 mplayer % UBSAN_OPTIONS=print_stacktrace=1
/var/tmp/gcc_ubsan/usr/local/bin/gcc -O3 -march=amdfam10 -c subassconvert.i
../../gcc/gcc/tree-ssa-loop-prefetch.c:835:16: runtime error: signed integer
overflow: 288230376151711743 * 64 cannot be represented in type 'long int'
#0 0x232e7bd in prune_ref_by_group_reuse
../../gcc/gcc/tree-ssa-loop-prefetch.c:835
#1 0x232e7bd in prune_ref_by_reuse
../../gcc/gcc/tree-ssa-loop-prefetch.c:923
#2 0x232e7bd in prune_group_by_reuse
../../gcc/gcc/tree-ssa-loop-prefetch.c:936
#3 0x232e7bd in prune_by_reuse ../../gcc/gcc/tree-ssa-loop-prefetch.c:975
#4 0x232e7bd in loop_prefetch_arrays
../../gcc/gcc/tree-ssa-loop-prefetch.c:1879
#5 0x232e7bd in tree_ssa_prefetch_arrays()
../../gcc/gcc/tree-ssa-loop-prefetch.c:1989
#6 0x195ad78 in execute_one_pass(opt_pass*) ../../gcc/gcc/passes.c:2370
#7 0x195cc0b in execute_pass_list_1 ../../gcc/gcc/passes.c:2459
#8 0x195cc34 in execute_pass_list_1 ../../gcc/gcc/passes.c:2460
#9 0x195cc34 in execute_pass_list_1 ../../gcc/gcc/passes.c:2460
#10 0x195ccc4 in execute_pass_list(function*, opt_pass*)
../../gcc/gcc/passes.c:2470
#11 0xc75e4b in cgraph_node::expand() ../../gcc/gcc/cgraphunit.c:2001
#12 0xc7b35a in expand_all_functions ../../gcc/gcc/cgraphunit.c:2137
#13 0xc7b35a in symbol_table::compile() ../../gcc/gcc/cgraphunit.c:2494
#14 0xc85517 in symbol_table::compile() ../../gcc/gcc/cgraphunit.c:2587
#15 0xc85517 in symbol_table::finalize_compilation_unit()
../../gcc/gcc/cgraphunit.c:2584
#16 0x1d3ead0 in compile_file ../../gcc/gcc/toplev.c:488
#17 0x629a34 in do_compile ../../gcc/gcc/toplev.c:1983
#18 0x629a34 in toplev::main(int, char**) ../../gcc/gcc/toplev.c:2117
#19 0x62c066 in main ../../gcc/gcc/main.c:39
#20 0x7f60d01cf310 in __libc_start_main ../csu/libc-start.c:286
#21 0x62c489 in _start
(/var/tmp/gcc_ubsan/usr/local/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/cc1+0x62c489)
