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src/hotspot/share/opto/bytecodeInfo.cpp
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rev 54728 : force inline of iterator() methods for better scalar replacement of iterators
rev 54748 : force inline of iterator() methods for better scalar replacement of iterators, v2.0
@@ -1,7 +1,7 @@
/*
- * Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
@@ -75,10 +75,11 @@
/**
* Return true when EA is ON and a java constructor is called or
* a super constructor is called from an inlined java constructor.
* Also return true for boxing methods.
+ * Also return true for Iterable::iterator() invocation that is essential for forall-loops performance.
*/
static bool is_init_with_ea(ciMethod* callee_method,
ciMethod* caller_method, Compile* C) {
if (!C->do_escape_analysis() || !EliminateAllocations) {
return false; // EA is off
@@ -92,10 +93,15 @@
return true; // super constructor is called from inlined constructor
}
if (C->eliminate_boxing() && callee_method->is_boxing_method()) {
return true;
}
+ if (callee_method->name() == ciSymbol::iterator_name()) {
+ if (callee_method->signature()->return_type()->is_subtype_of(C->env()->Iterator_klass())) {
+ return true;
+ }
+ }
return false;
}
/**
* Force inlining unboxing accessor.
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