This patch flips the default for the VRP2 pass to execute ranger vrp rather
than the assert_expr version of VRP.
* params.opt (param_vrp2_mode): Make ranger the default for VRP2.
--param=vrp1-mode=[vrp|ranger] Specifies the mode VRP1 should operate in.
-param=vrp2-mode=
-Common Joined Var(param_vrp2_mode) Enum(vrp_mode) Init(VRP_MODE_VRP) Param Optimization
+Common Joined Var(param_vrp2_mode) Enum(vrp_mode) Init(VRP_MODE_RANGER) Param Optimization
--param=vrp2-mode=[vrp|ranger] Specifies the mode VRP2 should operate in.
Enum