Simplify the definition of a given function, including the guard and measure.
See simplify-defun.
ACL2 !>:trans1 (simplify-defun+ f1 :enable (foo bar)) (SIMPLIFY-DEFUN F1 :SIMPLIFY-GUARD T :SIMPLIFY-MEASURE T :ENABLE (FOO BAR)) ACL2 !>:trans1 (show-simplify-defun+ f1 :enable (foo bar)) (SHOW-SIMPLIFY-DEFUN F1 :SIMPLIFY-GUARD T :SIMPLIFY-MEASURE T :ENABLE (FOO BAR)) ACL2 !>