Mercurial > hg > graal-jvmci-8
view src/share/vm/opto/stringopts.hpp @ 1367:9e321dcfa5b7
6940726: Use BIS instruction for allocation prefetch on Sparc
Summary: Use BIS instruction for allocation prefetch on Sparc
Reviewed-by: twisti
author | kvn |
---|---|
date | Wed, 07 Apr 2010 12:39:27 -0700 |
parents | 7c57aead6d3e |
children | c18cbe5936b8 |
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/* * Copyright 2009 Sun Microsystems, Inc. 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. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ class StringConcat; class PhaseStringOpts : public Phase { friend class StringConcat; private: PhaseGVN* _gvn; // List of dead nodes to clean up aggressively at the end Unique_Node_List dead_worklist; // Memory slices needed for code gen int char_adr_idx; int value_field_idx; int count_field_idx; int offset_field_idx; // Integer.sizeTable - used for int to String conversion ciField* size_table_field; // A set for use by various stages VectorSet _visited; // Collect a list of all SB.toString calls Node_List collect_toString_calls(); // Examine the use of the SB alloc to see if it can be replace with // a single string construction. StringConcat* build_candidate(CallStaticJavaNode* call); // Replace all the SB calls in concat with an optimization String allocation void replace_string_concat(StringConcat* concat); // Load the value of a static field, performing any constant folding. Node* fetch_static_field(GraphKit& kit, ciField* field); // Compute the number of characters required to represent the int value Node* int_stringSize(GraphKit& kit, Node* value); // Copy the characters representing value into char_array starting at start void int_getChars(GraphKit& kit, Node* value, Node* char_array, Node* start, Node* end); // Copy of the contents of the String str into char_array starting at index start. Node* copy_string(GraphKit& kit, Node* str, Node* char_array, Node* start); // Clean up any leftover nodes void record_dead_node(Node* node); void remove_dead_nodes(); PhaseGVN* gvn() { return _gvn; } enum { // max length of constant string copy unrolling in copy_string unroll_string_copy_length = 6 }; public: PhaseStringOpts(PhaseGVN* gvn, Unique_Node_List* worklist); };