;;; -*- Mode: Common-Lisp; Package: COMPILER; Base: 10.; Patch-File: T -*-

;;; Reason: MULTIPLE-VALUE-PROG1 fails to compile correctly when in the condition part of a COND. [10484]

;;;                           RESTRICTED RIGHTS LEGEND
;;;
;;; Use, duplication, or disclosure by the Government is subject to
;;; restrictions as set forth in subdivision (c)(1)(ii) of the Rights in
;;; Technical Data and Computer Software clause at 52.227-7013.
;;;
;;;   TEXAS INSTRUMENTS INCORPORATED      
;;;   P.O. BOX 2909, M/S 2151             
;;;   AUSTIN, TEXAS 78769                 
;;;
;;; Copyright (C) 1989 Texas Instruments Incorporated.
;;; All rights reserved.

;;; Written 05/30/90 11:32:09 by BERGER,
;;; while running on ARIES from band LODX
;;; With SYSTEM 6.35, VIRTUAL-MEMORY 6.3, EH 6.8, MAKE-SYSTEM 6.3, MICRONET 6.0, LOCAL-FILE 6.2,
;;;  BASIC-PATHNAME 6.5, NETWORK-SUPPORT-COLD 6.2, BASIC-NAMESPACE 6.8, NETWORK-NAMESPACE 6.1,
;;;  DISK-IO 6.3, DISK-LABEL 6.0, BASIC-FILE 6.13, MAC-PATHNAME 6.0, NETWORK-PATHNAME 6.2,
;;;  COMPILER 6.14, TV 6.25, DATALINK 6.0, CHAOSNET 6.8, GC 6.4, MEMORY-AUX 6.0, NVRAM 6.3,
;;;  SYSLOG 6.2, STREAMER-TAPE 6.6, UCL 6.0, INPUT-EDITOR 6.0, METER 6.2, ZWEI 6.18,
;;;  DEBUG-TOOLS 6.4, NETWORK-SUPPORT 6.1, NETWORK-SERVICE 6.3, DATALINK-DISPLAYS 6.0,
;;;  FONT-EDITOR 6.1, SERIAL 6.0, PRINTER 6.6, MAC-PRINTER-TYPES 6.2, PRINTER-TYPES 6.2,
;;;  IMAGEN 6.1, SUGGESTIONS 6.1, MAIL-DAEMON 6.6, MAIL-READER 6.8, TELNET 6.1, VT100 6.0,
;;;  NAMESPACE-EDITOR 6.5, PROFILE 6.3, VISIDOC 6.7, TI-CLOS 6.47, CLEH 6.5, IP 3.65,
;;;  Experimental CLX 6.11, CLUE 6.104, X11M 6.24, Experimental BUG 11.19,  microcode 483,
;;;  Band Name: REL 6.0 +SLE 5/30

#!C
; From file P2HAND.LISP#> COMPILER; SYS:
#10R COMPILER#:
(COMPILER-LET ((*PACKAGE* (FIND-PACKAGE "COMPILER"))
                          (SI:*LISP-MODE* :COMMON-LISP)
                          (*READTABLE* COMMON-LISP-READTABLE)
                          (SI:*READER-SYMBOL-SUBSTITUTIONS* SYS::*COMMON-LISP-SYMBOL-SUBSTITUTIONS*))
  (COMPILER#:PATCH-SOURCE-FILE "SYS: COMPILER; P2HAND.#"


(DEFUN P2MULTIPLE-VALUE-PROG1 (TAIL DEST)
  ;;  4/21/86 CLM - Fix to prevent superfluous RETURN instruction
  ;;                from being generated.
  ;; 10/08/86 DNG - Fix to not use RETURN-N when only a single value pushed.
  ;; 01/16/87 CLM - Fix to handle unbinding of special variables if within a
  ;;                CATCH.
  (LET (SINGLE-VALUE-RETURN)
    (COND ((OR (EQ DEST 'D-RETURN)
	       (EQ M-V-TARGET 'RETURN-CATCH))
	   (SETQ SINGLE-VALUE-RETURN
		 (P2MV (CAR TAIL) 'D-PDL 'RETURN))
	   (UNLESS SINGLE-VALUE-RETURN
	     (SETQ M-V-TARGET NIL)) )
	  (M-V-TARGET
	   (UNLESS (P2MV (CAR TAIL) DEST M-V-TARGET)
	     (SETQ M-V-TARGET nil)))
	  (T (P2 (CAR TAIL)
		 (IF (EQ DEST 'D-LAST)
		     'D-PDL
		   DEST))))
    (DOLIST (FORM (CDR TAIL))
      (P2 FORM 'D-IGNORE))
    (IF (AND (EQ DEST 'D-RETURN)
	     (NOT SINGLE-VALUE-RETURN))
	(OUT-AUX 'RETURN-N)
      ;;RDA: Change WHEN to IF
      (if (MEMBER DEST '(D-RETURN D-LAST) :TEST #'EQ)
	(MOVE-RESULT-FROM-PDL DEST)
	;; ; DAB 05-30-90 FOR RA [10484]
	;;RDA: When returning on value on the stack, make sure the flags are
	;;correct too.  This kludge pops and pushs the value that's already
	;;on the stack to reset the flags.
	(if (eq dest 'd-pdl)
	    (OUTI `(MOVE ,DEST PDL-POP)))
	))))
))