cmpc: remove the safety-level qualifier :SAFE from the inliner

This inlining qualifier was commented to be applied only in the safe code, but
in the code it was applied all the same as :always (as a second choice after the
unsafe optimizer). Moreover there was only single sysfun that specified it.

src/cmp/cmpbackend-cxx/cmpc-inl-sysfun.lsp

@@ -23,9 +23,9 @@
 ;;; Here, ARG-TYPE is the list of argument types belonging to the lisp family,
 ;;; while RETURN-REP-TYPE is a representation type, i.e. the C type of the
 ;;; output expression. EXPANSION-STRING is a C/C++ expression template, like the
-;;; ones used by C-INLINE. Finally, KIND can be :ALWAYS, :SAFE or :UNSAFE,
-;;; depending on whether the inline expression should be applied always, in safe
-;;; or in unsafe compilation mode, respectively.
+;;; ones used by C-INLINE. Finally, KIND can be :ALWAYS or :UNSAFE, depending on
+;;; whether the inline expression should be applied always or only in the unsafe
+;;; compilation mode, respectively.
 ;;;
 
 (defun inline-information (name safety)
@@ -41,9 +41,8 @@
   (setf safety
         (case safety
           (:unsafe :inline-unsafe)
-          (:safe :inline-safe)
           (:always :inline-always)
-          (t (error "In DEF-INLINE, wrong value of SAFETY"))))
+          (t (error "In DEF-INLINE, ~s is a wrong value of SAFETY." safety))))
   ;; Ensure we can inline this form. We only inline when the features are
   ;; there (checked above) and when the C types are part of this machine
   ;; (checked here).
@@ -333,7 +332,7 @@
 
     (def-inline cl:cons :always (t t) t "CONS(#0,#1)")
 
-    (def-inline cl:endp :safe (t) :bool "ecl_endp(#0)")
+    (def-inline cl:endp :always (t) :bool "ecl_endp(#0)")
     (def-inline cl:endp :unsafe (t) :bool "#0==ECL_NIL")
 
     (def-inline cl:nth :always (t t) t "ecl_nth(ecl_to_size(#0),#1)")

src/cmp/cmpbackend-cxx/cmpc-inliner.lsp

@@ -96,10 +96,6 @@
         (let ((other (inline-type-matches x types return-type)))
           (when other
             (setf output (choose-inline-info output other return-type return-rep-type))))))
-    (dolist (x (inline-information fname ':INLINE-SAFE))
-      (let ((other (inline-type-matches x types return-type)))
-        (when other
-          (setf output (choose-inline-info output other return-type return-rep-type)))))
     (dolist (x (inline-information fname ':INLINE-ALWAYS))
       (let ((other (inline-type-matches x types return-type)))
         (when other

src/cmp/cmpbackend-cxx/cmpc-opt-inl.lsp

@@ -14,7 +14,6 @@
 
 ;;; Valid property names for open coded functions are:
 ;;;  :INLINE-ALWAYS
-;;;  :INLINE-SAFE       safe-compile only
 ;;;  :INLINE-UNSAFE     non-safe-compile only
 ;;;
 ;;; Each property is a list of 'inline-info's, where each inline-info is:
@@ -22,12 +21,14 @@
 ;;;
 ;;; For each open-codable function, open coding will occur only if there exits
 ;;; an appropriate property with the argument types equal to 'types' and with
-;;; the return-type equal to 'type'.  The third element
-;;; is T if and only if side effects may occur by the call of the function.
-;;; Even if *DESTINATION* is TRASH, open code for such a function with side
-;;; effects must be included in the compiled code.
-;;; The forth element is T if and only if the result value is a new Lisp
-;;; object, i.e., it must be explicitly protected against GBC.
+;;; the return-type equal to 'type'.
+;;;
+;;; The third element is T if and only if side effects may occur by the call of
+;;; the function.  Even if *DESTINATION* is TRASH, open code for such a function
+;;; with side effects must be included in the compiled code.
+;;;
+;;; The forth element is T if and only if the result value is a new Lisp object,
+;;; i.e., it must be explicitly protected against GBC.
 
 (defun make-inline-temp-var (value-type &optional rep-type)
   (let ((out-rep-type (or rep-type (lisp-type->rep-type value-type))))