[9] RFR(S): 8137160: Use Compile::live_nodes instead of Compile::unique() in appropriate places -- followup

[Zoltán Majó]

Hi,


please review the following patch for JDK-8137160.

Bug: https://bugs.openjdk.java.net/browse/JDK-8137160

Problem: JDK-8011858 changed memory allocation for compiler-related data 
structures to use Compile::live_nodes() instead of 
Compile::unique_nodes() to reduce the C2 compiler's memory usage. While 
backporting JDK-8011858 to 8u72, we discovered two code locations where 
live_nodes() and be used instead of unique_nodes().

Solution: This patch changes allocation at the above-mentioned two code 
locations to use live_nodes() instead of unique_nodes(). The patch also 
updates comments so that they match the source code.

Webrev:
http://cr.openjdk.java.net/~zmajo/8137160/webrev.00/

Testing:
- JPRT, all tests pass;
- all hotspot tests executed locally; all tests pass that pass with an 
unmodified VM.

Thank you and best regards,


Zoltan