git: openjdk/mobile: 8233364: Fix undefined behavior in Canonicalizer::do_ShiftOp

[duke]

Changeset: 89e3782f
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2019-11-07 16:22:22 +0000
URL:       https://git.openjdk.java.net/mobile/commit/89e3782f

8233364: Fix undefined behavior in Canonicalizer::do_ShiftOp

Add java_shift_xxx helpers and use them.

Reviewed-by: aph, kvn

! src/hotspot/share/c1/c1_Canonicalizer.cpp
! src/hotspot/share/utilities/globalDefinitions.hpp
+ test/hotspot/gtest/utilities/test_java_arithmetic.cpp