https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69358
Bug ID: 69358
Summary: [6 regression] internal compiler error: in
equal_mem_array_ref_p
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ienkovich at gcc dot gnu.org
Target Milestone: ---
I see it starting from r232508.
>cat test.i
int a, b;
int c[1][4];
int fn1() {
int i, j, d;
j = 0;
for (; j < 4; j++)
for (; i; i++)
c[i][j] = a;
for (; i; i++) {
j = 0;
for (; j < 2; j++)
d = c[i][d] = c[i][j];
j = 0;
for (; j < 4; j++)
b = a;
}
}
>gcc -O2 -S test.i
test.i: In function 'fn1':
test.i:3:5: internal compiler error: in equal_mem_array_ref_p, at
tree-ssa-scopedtables.c:271
int fn1() {
^~~
0x1007f55 equal_mem_array_ref_p
/export/users/ienkovic/issues/avx-512/gcc/gcc/tree-ssa-scopedtables.c:271
0x10081d6 hashable_expr_equal_p
/export/users/ienkovic/issues/avx-512/gcc/gcc/tree-ssa-scopedtables.c:310
0x10097b3 expr_elt_hasher::equal(expr_hash_elt* const&, expr_hash_elt* const&)
/export/users/ienkovic/issues/avx-512/gcc/gcc/tree-ssa-scopedtables.c:747
0xf47a36 hash_table<expr_elt_hasher,
xcallocator>::find_slot_with_hash(expr_hash_elt* const&, unsigned int,
insert_option)
/export/users/ienkovic/issues/avx-512/gcc/gcc/hash-table.h:873
0xf47bc1 hash_table<expr_elt_hasher, xcallocator>::find_slot(expr_hash_elt*
const&, insert_option)
/export/users/ienkovic/issues/avx-512/gcc/gcc/hash-table.h:414
0xf46e4e lookup_avail_expr
/export/users/ienkovic/issues/avx-512/gcc/gcc/tree-ssa-dom.c:2018
0xf45677 eliminate_redundant_computations
/export/users/ienkovic/issues/avx-512/gcc/gcc/tree-ssa-dom.c:1460
0xf46763 optimize_stmt
/export/users/ienkovic/issues/avx-512/gcc/gcc/tree-ssa-dom.c:1863
0xf4534a dom_opt_dom_walker::before_dom_children(basic_block_def*)
/export/users/ienkovic/issues/avx-512/gcc/gcc/tree-ssa-dom.c:1368
0x16bad82 dom_walker::walk(basic_block_def*)
/export/users/ienkovic/issues/avx-512/gcc/gcc/domwalk.c:265
0xf4390e execute
/export/users/ienkovic/issues/avx-512/gcc/gcc/tree-ssa-dom.c:613
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Please include the complete backtrace with any bug report.
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