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[patch] Avoid division by zero in data-refs dependence analysis

From: Ira Rosen <IRAR at il dot ibm dot com>
To: gcc-patches at gnu dot org
Cc: Revital1 Eres <ERES at il dot ibm dot com>
Date: Thu, 22 Mar 2007 16:06:42 +0200
Subject: [patch] Avoid division by zero in data-refs dependence analysis

An attempt to divide by zero was made (causing ICE on the attached test
case) for evolution functions with zero step.

Thanks to Revital for the test case.

Bootstrapped and tested on ppc-linux.
O.K. for mainline?

Thanks,
Ira

ChangeLog entry:

      * tree-data-ref.c (chrec_steps_divide_constant_p): Avoid division
      by 0.

(See attached file: patch.txt)


:ADDPATCH SSA:

Attachment: patch.txt
Description: Text document

Follow-Ups:
- Re: [patch] Avoid division by zero in data-refs dependence analysis
  - From: Sebastian Pop

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