1 ;;;; This file implements the IR1 finalize phase, which checks for
2 ;;;; various semantic errors.
4 ;;;; This software is part of the SBCL system. See the README file for
7 ;;;; This software is derived from the CMU CL system, which was
8 ;;;; written at Carnegie Mellon University and released into the
9 ;;;; public domain. The software is in the public domain and is
10 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
11 ;;;; files for more information.
15 ;;; Give the user grief about optimizations that we weren't able to do. It
16 ;;; is assumed that they want to hear, or there wouldn't be any entries in the
17 ;;; table. If the node has been deleted or is no longer a known call, then do
18 ;;; nothing; some other optimization must have gotten to it.
19 (defun note-failed-optimization (node failures)
20 (declare (type combination node) (list failures))
21 (unless (or (node-deleted node)
22 (not (function-info-p (combination-kind node))))
23 (let ((*compiler-error-context* node))
24 (dolist (failure failures)
25 (let ((what (cdr failure))
26 (note (transform-note (car failure))))
29 (compiler-note "unable to ~A because:~%~6T~?"
30 note (first what) (rest what)))
31 ((valid-function-use node what
32 :argument-test #'types-intersect
33 :result-test #'values-types-intersect)
35 (flet ((frob (string &rest stuff)
38 (valid-function-use node what
39 :warning-function #'frob
40 :error-function #'frob))
42 (compiler-note "unable to ~A due to type uncertainty:~@
44 note (messages))))))))))
46 ;;; For each named function with an XEP, note the definition of that
47 ;;; name, and add derived type information to the info environment. We
48 ;;; also delete the FUNCTIONAL from *FREE-FUNCTIONS* to eliminate the
49 ;;; possibility that new references might be converted to it.
50 (defun finalize-xep-definition (fun)
51 (let* ((leaf (functional-entry-function fun))
52 (name (leaf-name leaf))
53 (dtype (definition-type leaf)))
54 (setf (leaf-type leaf) dtype)
55 (when (or (and name (symbolp name))
56 (and (consp name) (eq (car name) 'setf)))
57 (let* ((where (info :function :where-from name))
58 (*compiler-error-context* (lambda-bind (main-entry leaf)))
59 (global-def (gethash name *free-functions*))
61 (and (defined-function-p global-def)
62 (eq (defined-function-functional global-def) leaf))))
63 (note-name-defined name :function)
65 (remhash name *free-functions*))
68 (let ((approx-type (info :function :assumed-type name)))
69 (when (and approx-type (function-type-p dtype))
70 (valid-approximate-type approx-type dtype))
71 (setf (info :function :type name) dtype)
72 (setf (info :function :assumed-type name) nil))
73 (setf (info :function :where-from name) :defined))
74 (:declared); Just keep declared type.
77 (setf (info :function :type name) dtype)))))))
80 ;;; Find all calls in Component to assumed functions and update the assumed
81 ;;; type information. This is delayed until now so that we have the best
82 ;;; possible information about the actual argument types.
83 (defun note-assumed-types (component name var)
84 (when (and (eq (leaf-where-from var) :assumed)
85 (not (and (defined-function-p var)
86 (eq (defined-function-inlinep var) :notinline)))
87 (eq (info :function :where-from name) :assumed)
88 (eq (info :function :kind name) :function))
89 (let ((atype (info :function :assumed-type name)))
90 (dolist (ref (leaf-refs var))
91 (let ((dest (continuation-dest (node-cont ref))))
92 (when (and (eq (block-component (node-block ref)) component)
94 (eq (continuation-use (basic-combination-fun dest)) ref))
95 (setq atype (note-function-use dest atype)))))
96 (setf (info :function :assumed-type name) atype))))
98 ;;; Do miscellaneous things that we want to do once all optimization has
100 ;;; -- Record the derived result type before the back-end trashes the
102 ;;; -- Note definition of any entry points.
103 ;;; -- Note any failed optimizations.
104 (defun ir1-finalize (component)
105 (declare (type component component))
106 (dolist (fun (component-lambdas component))
107 (case (functional-kind fun)
109 (finalize-xep-definition fun))
111 (setf (leaf-type fun) (definition-type fun)))))
113 (maphash #'note-failed-optimization
114 (component-failed-optimizations component))
116 (maphash #'(lambda (k v)
117 (note-assumed-types component k v))