Callers of globalDefinitions.hpp's build_u2_from() should instead call Bytes::get_Java_u2(). And, build_u2_from() should be removed.

The methods in class Bytes are optimized machine-specifically and may be much faster than globalDefinitions.hpp's build_u2_from() method.

The current callers of build_u2_from() are:

open/src/hotspot/share/jvmci/compilerRuntime.cpp: int len = build_u2_from((address)name);
open/src/hotspot/share/jvmci/compilerRuntime.cpp: int len = build_u2_from((address)name);
open/src/hotspot/share/jvmci/compilerRuntime.cpp: int method_name_len = build_u2_from((address)data);
open/src/hotspot/share/jvmci/compilerRuntime.cpp: int signature_name_len = build_u2_from((address)data);
open/src/hotspot/share/jvmci/compilerRuntime.cpp: int len = build_u2_from((address)name);
open/src/hotspot/share/aot/aotCompiledMethod.cpp: int klass_len = build_u2_from((address)meta_name);
open/src/hotspot/share/aot/aotCompiledMethod.cpp: int method_name_len = build_u2_from((address)klass_name + klass_len);
open/src/hotspot/share/aot/aotCompiledMethod.cpp: int klass_len = build_u2_from((address)meta_name);
open/src/hotspot/share/aot/aotCompiledMethod.cpp: int method_name_len = build_u2_from((address)klass_name + klass_len);
open/src/hotspot/share/aot/aotCompiledMethod.cpp: int signature_len = build_u2_from((address)klass_name + klass_len + 2 + method_name_len);
open/src/hotspot/share/aot/aotCodeHeap.cpp: int len = build_u2_from((address)stub_name);
open/src/hotspot/share/aot/aotCodeHeap.cpp: int method_name_len = build_u2_from((address)method_name);
open/src/hotspot/share/aot/aotCodeHeap.cpp: int signature_name_len = build_u2_from((address)signature_name);
open/src/hotspot/share/aot/aotCodeHeap.cpp: int klass_len = build_u2_from((address)aot_name);