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Bug ID: 6463375 Fix the condition for a commutative operation's inputs swapping during final graph reshaping
6463375 : Fix the condition for a commutative operation's inputs swapping during final graph reshaping

Details
Type:
Bug
Submit Date:
2006-08-24
Status:
Resolved
Updated Date:
2010-04-03
Project Name:
JDK
Resolved Date:
2006-11-14
Component:
hotspot
OS:
solaris_9
Sub-Component:
compiler
CPU:
sparc
Priority:
P4
Resolution:
Fixed
Affected Versions:
7
Fixed Versions:
hs10

Related Reports
Backport:
JDK-2176752 - Fix the condition for a commutative operation's inputs swapping during final graph reshaping
Backport:
JDK-2171817 - Fix the condition for a commutative operation's inputs swapping during final graph reshaping

Sub Tasks

Description
The condition in final_graph_reshaping_impl() is incomplete.
It misses the check for commutative nodes MaxI and MinI.
And it allows to swap the input from a loop's Phi node to the second input
of a commutative node.
All this increse a register pressure during RA.

Comments
EVALUATION

See description.
2006-08-24 
SUGGESTED FIX

Webrev:                 http://analemma.sfbay.sun.com/net/prt-archiver.sfbay/data/archived_workspaces/main/c2_baseline/2006/20060824120305.kvn.6463375/workspace/webrevs/webrev-2006.08.24/index.html
2006-08-24


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