hg: jdk/jdk: 8237581: Improve allocation expansion

[nils.eliasson at oracle.com]

Changeset: 6e507ee93768
Author:    neliasso
Date:      2020-02-06 11:21 +0100
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/6e507ee93768

8237581: Improve allocation expansion
Reviewed-by: vlivanov, redestad

! src/hotspot/share/opto/macro.cpp
! src/hotspot/share/opto/macro.hpp
+ test/hotspot/jtreg/compiler/allocation/TestAllocation.java
+ test/micro/org/openjdk/bench/vm/compiler/ArrayAllocation.java