https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102285
--- Comment #5 from qinzhao at gcc dot gnu.org --- with the latest GCC, for all the 42647 c files under gcc/testsuite, with -c -g -O2 -Wall -ftrivial-auto-var-init=zero, there is only one failure: /home/opc/Install/latest/bin/gcc -c -g -ftrivial-auto-var-init=zero -O2 -Wall ./gcc.dg/graphite/pr82421.c during RTL pass: expand ./gcc.dg/graphite/pr82421.c: In function ‘qy’: ./gcc.dg/graphite/pr82421.c:10:7: internal compiler error: in expand_expr_addr_expr_1, at expr.c:8432 10 | int fb[tw]; | ^~ 0x6b3494 expand_expr_addr_expr_1 ../../latest-gcc/gcc/expr.c:8432 0xaecd9d expand_expr_addr_expr ../../latest-gcc/gcc/expr.c:8545 0xaecd9d expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool) ../../latest-gcc/gcc/expr.c:11761 0xaeac65 expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool) ../../latest-gcc/gcc/expr.c:8733 0xaeac65 expand_expr ../../latest-gcc/gcc/expr.h:301 0xaeac65 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode, expand_modifier) ../../latest-gcc/gcc/expr.c:9053 0xaeb732 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool) ../../latest-gcc/gcc/expr.c:11818 0x991030 expand_expr ../../latest-gcc/gcc/expr.h:301 0x991030 get_memory_rtx ../../latest-gcc/gcc/builtins.c:1369 0x9989f5 expand_builtin_memset_args ../../latest-gcc/gcc/builtins.c:4101 0x9c4a67 expand_call_stmt ../../latest-gcc/gcc/cfgexpand.c:2749 0x9c4a67 expand_gimple_stmt_1 ../../latest-gcc/gcc/cfgexpand.c:3876 0x9c4a67 expand_gimple_stmt ../../latest-gcc/gcc/cfgexpand.c:4040 0x9cac8b expand_gimple_basic_block ../../latest-gcc/gcc/cfgexpand.c:6082 0x9cc98f execute ../../latest-gcc/gcc/cfgexpand.c:6808 Please submit a full bug report, delete -ftrivial-auto-var-init=zero, the failure is gone. I will study this one to fix it.