Request for reviews (XS): 6866651: Regression: simple int sum crashes jvm (build 1.6.0_14-b08 and 1.7.0-ea-b59)
Thomas.Rodriguez at Sun.COM
Fri Aug 14 15:35:14 PDT 2009
You also don't need the /othervm part.
On Aug 14, 2009, at 3:09 PM, Vladimir Kozlov wrote:
> Looks good.
> I would remove -server from the test options to run it with tested
> (client) VM instead of default VM.
> changpeng fang - Sun Microsystems - Santa Clara United States wrote:
>> Fixed 6866651: Regression: simple int sum crashes jvm (build
>> 1.6.0_14-b08 and 1.7.0-ea-b59)
>> set_req_X will do dead code elimination if the original input has
>> no other use. However, it is possible to
>> have the current node (this) removed if a dead loop exists. So,
>> dead code elimination in set_req_X is not
>> safe, and may cause undesired consequences (like the segfault in
>> Instead of doing dead code elimination immediately in set_req_X, we
>> put the dead node (original input) into
>> the worklist, and the dead node will eventually be eliminated when
>> it is its turn to be processed.
>> In addition, before ideal transformations, we replace a node with
>> a constant if we know it computes a constant
>> to skip unneeded optimizations on this node.
>> Tests: JPRT, CompileTheWorld, Test case in bug report (Test.java in
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