1 Exhibit 8.2 WILSON SONSINI GOODRICH & ROSATI 650 Page Mill Road Palo Alto, California 94304 February 4, 1997 Epic Design Technology, Inc. 310 N. Mary Avenue Sunnyvale, California 94086 Ladies and Gentlemen: We have acted as counsel for EPIC Design Technology, Inc., a California corporation ("EPIC") in connection with the preparation and execution of the Agreement and Plan of Merger (the "Merger Agreement") dated as of January 16, 1997, among Synopsys, Inc., a Delaware corporation ("Synopsys"), EPIC Merger Co., Inc., a wholly-owned subsidiary of Synopsys incorporated in Delaware ("Sub"), and EPIC. Pursuant to the Merger Agreement, Sub will merge with and into EPIC (the "Merger"), and EPIC will become a wholly-owned subsidiary of Synopsys. Unless otherwise defined, capitalized terms referred to herein have the meanings set forth in the Merger Agreement. All section references, unless otherwise indicated, are to the Internal Revenue Code of 1986, as amended (the "Code"). You have requested our opinion regarding certain United States federal income tax consequences of the Merger. In delivering this opinion, we have reviewed and relied upon the facts, statements, descriptions and representations set forth in the Registration Statement on Form S-4 filed by Synopsys with the Securities and Exchange Commission (which contains a prospectus and joint proxy statement of EPIC and Synopsys) (the "Registration Statement"), the Merger Agreement (including Exhibits), an opinion of counsel received by Synopsys from Gray Cary Ware & Freidenrich, Professional Corporation, substantially identical in substance to this opinion (the "GCWF Tax Opinion"), and such other documents pertaining to the Merger as we have deemed necessary or appropriate. We have also relied upon certificates of officers of EPIC and Synopsys respectively (the "Officers' Certificates"). In connection with rendering this opinion, we have also assumed (without any independent investigation) that: 1. Original documents (including signatures) are authentic, documents submitted to us as copies conform to the original documents, and there has been (or will be by the Effective Time) due execution and delivery of all documents where due execution and delivery are prerequisites to effectiveness thereof; 2 Epic Design Technology, Inc. February 4, 1997 Page 2 2. Any statement made in any of the documents referred to herein, "to the best of the knowledge" of any person or party is correct without such qualification; 3. All statements, descriptions and representations contained in any of the documents referred to herein or otherwise made to us are true and correct in all material respects and no actions have been (or will be) taken which are inconsistent with such representations; 4. The Merger will be reported by Synopsys and EPIC on their respective federal income tax returns in a manner consistent with the opinion set forth below; 5. The Merger will be consummated in accordance with the Merger Agreement (and without any waiver, breach or amendment of any of the provisions thereof) and will be effective under the applicable state law; and 6. The GCWF Tax Opinion has been delivered and not withdrawn. Based on our examination of the foregoing items and subject to the assumptions, exceptions, limitations and qualifications set forth herein, we are of the opinion that for federal income tax purposes, the Merger will constitute a "reorganization" as defined in Section 368(a) of the Code. This opinion represents and is based upon our best judgment regarding the application of federal income tax laws arising under the Code, existing judicial decisions, administrative regulations and published rulings and procedures. Our opinion is not binding upon the Internal Revenue Service or the courts, and there is no assurance that the Internal Revenue Service will not successfully assert a contrary position. Furthermore, no assurance can be given that future legislative, judicial or administrative changes, on either a prospective or retroactive basis, would not adversely affect the accuracy of the conclusions stated herein. Nevertheless, we undertake no responsibility to advise you of any new developments in the application or interpretation of the Federal income tax laws. This opinion addresses only the classification of the Merger as a reorganization under Section 368(a) of the Code, and does not address any other federal, state, local or foreign tax consequences that may result from the Merger or any other transaction (including any transaction undertaken in connection with the Merger). No opinion is expressed as to any transaction other than the Merger as described in the Merger Agreement or to any transaction whatsoever, including the Merger, if all the transactions described in the Merger Agreement are not consummated in accordance with the terms of such Merger Agreement and without waiver or breach of any material provision thereof or if all of the representations, warranties, statements and assumptions upon which we relied are not true and accurate at all relevant times. In the event any one of the statements, representations, warranties or assumptions upon which we have relied to issue this opinion is incorrect, our opinion might be adversely affected and may not be relied upon. 3 Epic Design Technology, Inc. February 4, 1997 Page 3 This opinion has been delivered to you for the purpose of satisfying the requirements of Section 7.1(h) of the Merger Agreement. It may not be relied upon for any other purpose or by any other person or entity, and may not be made available to any other person or entity without our prior written consent. We hereby consent to the filing of this opinion as an exhibit to the Registration Statement and to the use of our name under the heading "Certain Federal Income Tax Consequences." In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act of 1933, as amended. Very truly yours, /s/ WILSON SONSINI GOODRICH & ROSATI WILSON SONSINI GOODRICH & ROSATI Professional Corporation