RFR(S): 8203215: IdealLoopTree::split_outer_loop leaves phi-nodes with only one input
vladimir.kozlov at oracle.com
Wed May 16 01:15:58 UTC 2018
Yes, it is reasonable place to do IGV optimization.
> On May 15, 2018, at 2:06 AM, Nils Eliasson <nils.eliasson at oracle.com> wrote:
> I ran into an issue in the ZGC repo caused by optimizations encountering loop-phi-nodes having only one input. I tracked down the source of these to IdealLoopTree::split_outer_loop that is a part of beautify_loops.
> This patch makes sure that the phis that may need a transform is processed after beautify_loops is completed, but before the loop tree is rebuilt.
> Bug: https://bugs.openjdk.java.net/browse/JDK-8203215
> Webrev: http://cr.openjdk.java.net/~neliasso/8203215/webrev.01/
> Please review,
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