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Bug ID: JDK-6946892 c1 shouldn't do sign-extend to upper 32bits on x64
JDK-6946892 : c1 shouldn't do sign-extend to upper 32bits on x64

Details
Type:
Bug
Submit Date:
2010-04-23
Status:
Resolved
Updated Date:
2010-09-24
Project Name:
JDK
Resolved Date:
2010-05-05
Component:
hotspot
OS:
generic
Sub-Component:
compiler
CPU:
x86
Priority:
P4
Resolution:
Fixed
Affected Versions:
hs18
Fixed Versions:
hs18 (b04)

Related Reports
Backport:
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Sub Tasks

Description
C1 does sign-extension when it loads ints and shorts from memory to 64-bit registers. This cases problems for C2 in tiered, because it relies on the fact the int passed in a 64 bit register is zero-extended.
Webrev: http://cr.openjdk.java.net/~iveresov/6946892/webrev.00/

                                    

Comments
EVALUATION

http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/314e17ca2c23
                                     
2010-04-27



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