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.
18 ;;; Give the user grief about optimizations that we weren't able to do. It
19 ;;; is assumed that they want to hear, or there wouldn't be any entries in the
20 ;;; table. If the node has been deleted or is no longer a known call, then do
21 ;;; nothing; some other optimization must have gotten to it.
22 (defun note-failed-optimization (node failures)
23 (declare (type combination node) (list failures))
24 (unless (or (node-deleted node)
25 (not (function-info-p (combination-kind node))))
26 (let ((*compiler-error-context* node))
27 (dolist (failure failures)
28 (let ((what (cdr failure))
29 (note (transform-note (car failure))))
32 (compiler-note "unable to ~A because:~%~6T~?"
33 note (first what) (rest what)))
34 ((valid-function-use node what
35 :argument-test #'types-intersect
36 :result-test #'values-types-intersect)
38 (flet ((frob (string &rest stuff)
41 (valid-function-use node what
42 :warning-function #'frob
43 :error-function #'frob))
45 (compiler-note "unable to ~A due to type uncertainty:~@
47 note (messages))))))))))
49 ;;; For each named function with an XEP, note the definition of that
50 ;;; name, and add derived type information to the info environment. We
51 ;;; also delete the FUNCTIONAL from *FREE-FUNCTIONS* to eliminate the
52 ;;; possibility that new references might be converted to it.
53 (defun finalize-xep-definition (fun)
54 (let* ((leaf (functional-entry-function fun))
55 (name (leaf-name leaf))
56 (dtype (definition-type leaf)))
57 (setf (leaf-type leaf) dtype)
58 (when (or (and name (symbolp name))
59 (and (consp name) (eq (car name) 'setf)))
60 (let* ((where (info :function :where-from name))
61 (*compiler-error-context* (lambda-bind (main-entry leaf)))
62 (global-def (gethash name *free-functions*))
64 (and (defined-function-p global-def)
65 (eq (defined-function-functional global-def) leaf))))
66 (note-name-defined name :function)
68 (remhash name *free-functions*))
71 (let ((approx-type (info :function :assumed-type name)))
72 (when (and approx-type (function-type-p dtype))
73 (valid-approximate-type approx-type dtype))
74 (setf (info :function :type name) dtype)
75 (setf (info :function :assumed-type name) nil))
76 (setf (info :function :where-from name) :defined))
77 (:declared); Just keep declared type.
80 (setf (info :function :type name) dtype)))))))
83 ;;; Find all calls in Component to assumed functions and update the assumed
84 ;;; type information. This is delayed until now so that we have the best
85 ;;; possible information about the actual argument types.
86 (defun note-assumed-types (component name var)
87 (when (and (eq (leaf-where-from var) :assumed)
88 (not (and (defined-function-p var)
89 (eq (defined-function-inlinep var) :notinline)))
90 (eq (info :function :where-from name) :assumed)
91 (eq (info :function :kind name) :function))
92 (let ((atype (info :function :assumed-type name)))
93 (dolist (ref (leaf-refs var))
94 (let ((dest (continuation-dest (node-cont ref))))
95 (when (and (eq (block-component (node-block ref)) component)
97 (eq (continuation-use (basic-combination-fun dest)) ref))
98 (setq atype (note-function-use dest atype)))))
99 (setf (info :function :assumed-type name) atype))))
101 ;;; Do miscellaneous things that we want to do once all optimization has
103 ;;; -- Record the derived result type before the back-end trashes the
105 ;;; -- Note definition of any entry points.
106 ;;; -- Note any failed optimizations.
107 (defun ir1-finalize (component)
108 (declare (type component component))
109 (dolist (fun (component-lambdas component))
110 (case (functional-kind fun)
112 (finalize-xep-definition fun))
114 (setf (leaf-type fun) (definition-type fun)))))
116 (maphash #'note-failed-optimization
117 (component-failed-optimizations component))
119 (maphash #'(lambda (k v)
120 (note-assumed-types component k v))