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[Bug middle-end/57789] New: Waste work in repo_emit_p()
- From: "pchang9 at cs dot wisc.edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 02 Jul 2013 20:18:11 +0000
- Subject: [Bug middle-end/57789] New: Waste work in repo_emit_p()
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57789
Bug ID: 57789
Summary: Waste work in repo_emit_p()
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: pchang9 at cs dot wisc.edu
CC: nistor1 at illinois dot edu
Created attachment 30428
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30428&action=edit
Suggested patch
The problem appears in revision 200588 in version 4.9. I have attached a
one-line patch that fixes it.
In method "repo_emit_p()" in repo.c, the loop on line 342 should break
immediately after "emit_p" is set to 1. All the iterations after "emit_p" set
to 1 do not perform any useful work, at best they just set "emit_p" again to 1.