hg: jdk/sandbox: 8213419: C2 may hang in MulLNode::Ideal()/MulINode::Ideal() with gcc 8.2.1

[chris.hegarty at oracle.com]

Changeset: 1089e8fd8439
Author:    roland
Date:      2018-11-14 13:15 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/1089e8fd8439

8213419: C2 may hang in MulLNode::Ideal()/MulINode::Ideal() with gcc 8.2.1
Reviewed-by: kvn, dlong, aph

! src/hotspot/cpu/aarch64/assembler_aarch64.hpp
! src/hotspot/share/opto/mulnode.cpp
! src/hotspot/share/utilities/globalDefinitions.hpp
+ test/hotspot/jtreg/compiler/integerArithmetic/MultiplyByIntegerMinHang.java