Bug 32965 - missing documentation for -ftree-dse
Summary: missing documentation for -ftree-dse
Status: RESOLVED FIXED
Alias: None
Product: gcc
Classification: Unclassified
Component: web (show other bugs)
Version: unknown
: P3 minor
Target Milestone: 4.3.0
Assignee: Not yet assigned to anyone
URL:
Keywords:
: 33798 (view as bug list)
Depends on:
Blocks: 13756
  Show dependency tree / graph
 
Reported: 2007-08-02 02:29 UTC by rmoore-gcc
Modified: 2007-10-17 09:14 UTC (History)
2 users (show)

See Also:
Host:
Target:
Build:
Known to work:
Known to fail:
Last reconfirmed: 2007-08-02 02:33:37

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description rmoore-gcc 2007-08-02 02:29:14 UTC 
http://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html shows -ftree-dse as an optimization enabled by -O / -O1, but doesn't document it below.

via http://tinyurl.com/3cdlnu
Per tree-ssa-dce.c:
A dead store is a store into a memory location which will later be
overwritten by another store without any intervening loads. In this
case the earlier store can be deleted.
Comment 1 Andrew Pinski 2007-08-02 02:33:37 UTC 
Confirmed.  This was listed on PR 13756.
Comment 2 patchapp@dberlin.org 2007-09-04 09:45:29 UTC 
Subject: Bug number PR 32965

A patch for this bug has been added to the patch tracker.
The mailing list url for the patch is http://gcc.gnu.org/ml/gcc-patches/2007-09/msg00190.html
Comment 3 Rask Ingemann Lambertsen 2007-09-05 19:48:15 UTC 
Subject: Bug 32965

Author: rask
Date: Wed Sep  5 19:47:56 2007
New Revision: 128146

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=128146
Log:
	PR web/32965
	PR tree-optimization/13756
	* doc/invoke.texi (Options That Control Optimization): Document
	-ftree-dse.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/doc/invoke.texi
Comment 4 Rask Ingemann Lambertsen 2007-09-05 19:56:17 UTC 
Fixed with revision 128146. The online documentation will be updated automatically within 24 hours.
Comment 5 Andrew Pinski 2007-10-17 09:14:27 UTC 
*** Bug 33798 has been marked as a duplicate of this bug. ***