-- a/gcc/common.opt
++ b/gcc/common.opt
Enable copy propagation of scalar-evolution information.
ftrivial-auto-var-init=
Common Joined RejectNegative Enum(auto_init_type) Var(flag_auto_var_init) Init(AUTO_INIT_UNINITIALIZED) Optimization
Common Joined RejectNegative Enum(auto_init_type) Var(flag_auto_var_init) Init(AUTO_INIT_ZERO) Optimization
-ftrivial-auto-var-init=[uninitialized|pattern|zero] Add initializations to automatic variables.
Enum