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[Bug middle-end/57806] New: Waste work in propagate_nothrow()
- 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: Wed, 03 Jul 2013 16:48:47 +0000
- Subject: [Bug middle-end/57806] New: Waste work in propagate_nothrow()
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57806
Bug ID: 57806
Summary: Waste work in propagate_nothrow()
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
The problem appears in revision 200588 in version 4.9.
In method "propagate_nothrow()" in gcc/ipa-pure-const.c, the loop on line 1432
should break immediately after "can_throw" is set to "true". All the iterations
after "can_throw" set to "true" do not perform any useful work, at best they
just set "can_throw" again to "true".