gcc -fdump-rtl-expand ...
(call_insn 89 88 90 4 (set (reg:DI 0 ax)
(call (mem:QI (symbol_ref:DI ("memset") [flags 0x41] <function_decl 0x7f9d49127e00 __builtin_memset>) [0 __builtin_memset S1 A8])
(const_int 0 [0]))) "<b>text/convText.c</b>":53:3 -1