https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63472
--- Comment #2 from ak at gcc dot gnu.org --- Looks like there are more problems with -fgnu-tm I hacked csmith to generate random __transaction_atomic blocks and I got a lot of crashes immediately. All I looked at were variants of these two: 0x8e23b7 crash_signal ../../gcc/gcc/toplev.c:340 0x92df5c copy_loops ../../gcc/gcc/tree-inline.c:2379 0x93225c copy_cfg_body ../../gcc/gcc/tree-inline.c:2583 0x93225c copy_body ../../gcc/gcc/tree-inline.c:2777 0x935ab3 tree_function_versioning(tree_node*, tree_node*, vec<ipa_replace_map*, va_gc, vl_embed>*, bool, bitmap_head*, bool, bitmap_head*, basic_block_def*) and 0x6d7465 expand_expr_addr_expr_1 ../../gcc/gcc/expr.c:7737 0x6cd9a6 expand_expr_addr_expr ../../gcc/gcc/expr.c:7779 0x6cd9a6 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool) ../../gcc/gcc/expr.c:10604 0x6084f1 expand_normal ../../gcc/gcc/expr.h:457 0x6084f1 precompute_register_parameters ../../gcc/gcc/calls.c:832 0x6084f1 expand_call(tree_node*, rtx_def*, int) ../../gcc/gcc/calls.c:3002 0x5fbeb0 expand_builtin(tree_node*, rtx_def*, rtx_def*, machine_mode, int) ../../gcc/gcc/builtins.c:6825 0x6cdd95 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool) ../../gcc/gcc/expr.c:10369 0x6d751a store_expr(tree_node*, rtx_def*, int, bool) ../../gcc/gcc/expr.c:5337 0x6dc2d9 expand_assignment(tree_node*, tree_node*, bool)