https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99777
Bug ID: 99777
Summary: ICE in build2, at tree.c:4869 with -O3
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: vsevolod.livinskij at frtk dot ru
Target Milestone: ---
The error is not specific to skylake-avx512, I have a reproducer that shows it.
Reproducer:
#include <algorithm>
extern int var_142;
extern int a, c;
long h;
unsigned long long e;
signed char d;
extern short arr_323[][7][5][30];
void test(long long b,
short f[][17][25][22][20]) {
for (char i = 0; i < 7; i += 3)
for (unsigned char l = e; l < 5; l += 2) {
if (std::max((long long)0, std::min((long long)7, b)))
for (bool j = 0; j < 1; j = b) {
for (unsigned k = d; k < 20; k++)
h = f[0][i][l][b][k];
for (int m = 0; m < 5; m++)
arr_323[c][i][l][m] = 0;
}
for (int n = 0; n < 4; n += a)
var_142 = n;
}
}
Error:
>$ g++ -O3 -march=skylake-avx512 func.cpp -c
during GIMPLE pass: lim
func.cpp: In function ‘void test(long long int, short int
(*)[17][25][22][20])’:
func.cpp:10:6: internal compiler error: in build2, at tree.c:4869
10 | void test(long long b,
| ^~~~
0x85386f build2(tree_code, tree_node*, tree_node*, tree_node*)
gcc/gcc_src/gcc/tree.c:4869
0xddb96f build2_loc
gcc/gcc_src/gcc/tree.h:4407
0xddb96f fold_build2_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
gcc/gcc_src/gcc/fold-const.c:13736
0xde8de3 extract_muldiv_1
gcc/gcc_src/gcc/fold-const.c:6976
0xdea422 extract_muldiv
gcc/gcc_src/gcc/fold-const.c:6662
0xdea422 extract_muldiv
gcc/gcc_src/gcc/fold-const.c:6662
0xdea422 extract_muldiv
gcc/gcc_src/gcc/fold-const.c:6662
0xdd6bb1 fold_binary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
gcc/gcc_src/gcc/fold-const.c:11486
0xddb94d fold_build2_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
gcc/gcc_src/gcc/fold-const.c:13734
0x1c3b096 aff_combination_add_elt(aff_tree*, tree_node*,
generic_wide_int<fixed_wide_int_storage<192> > const&)
gcc/gcc_src/gcc/tree-affine.c:187
0x1c3b3d5 aff_combination_add(aff_tree*, aff_tree*)
gcc/gcc_src/gcc/tree-affine.c:215
0x124fc0f mem_refs_may_alias_p
gcc/gcc_src/gcc/tree-ssa-loop-im.c:1718
0x124fc83 refs_independent_p
gcc/gcc_src/gcc/tree-ssa-loop-im.c:2703
0x12502b4 ref_indep_loop_p
gcc/gcc_src/gcc/tree-ssa-loop-im.c:2764
0x1255ff4 can_sm_ref_p
gcc/gcc_src/gcc/tree-ssa-loop-im.c:2832
0x1255ff4 find_refs_for_sm
gcc/gcc_src/gcc/tree-ssa-loop-im.c:2853
0x1255ff4 store_motion_loop
gcc/gcc_src/gcc/tree-ssa-loop-im.c:2889
0x1255ddc store_motion_loop
gcc/gcc_src/gcc/tree-ssa-loop-im.c:2896
0x1255ddc store_motion_loop
gcc/gcc_src/gcc/tree-ssa-loop-im.c:2896
0x1258262 do_store_motion
gcc/gcc_src/gcc/tree-ssa-loop-im.c:2911
gcc version 11.0.1 20210323 (6b1f841ce0ccf30eda7896ba5ab0aa94c72307b2) (GCC)
