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1692
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1 /*
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2 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 2008, 2009 Red Hat, Inc.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 *
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24 */
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25
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26 class SharkTopLevelBlock;
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27 class DeferredZeroCheck;
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28
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29 class SharkFunction : public SharkTargetInvariants {
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30 friend class SharkStackWithNormalFrame;
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31
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32 public:
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33 static llvm::Function* build(ciEnv* env,
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34 SharkBuilder* builder,
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35 ciTypeFlow* flow,
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36 const char* name) {
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37 SharkFunction function(env, builder, flow, name);
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38 return function.function();
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39 }
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40
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41 private:
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42 SharkFunction(ciEnv* env,
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43 SharkBuilder* builder,
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44 ciTypeFlow* flow,
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45 const char* name)
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46 : SharkTargetInvariants(env, builder, flow) { initialize(name); }
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47
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48 private:
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49 void initialize(const char* name);
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50
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51 private:
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52 llvm::Function* _function;
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53 SharkTopLevelBlock** _blocks;
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54 GrowableArray<DeferredZeroCheck*> _deferred_zero_checks;
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55 SharkStack* _stack;
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56
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57 public:
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58 llvm::Function* function() const {
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59 return _function;
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60 }
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61 int block_count() const {
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62 return flow()->block_count();
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63 }
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64 SharkTopLevelBlock* block(int i) const {
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65 assert(i < block_count(), "should be");
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66 return _blocks[i];
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67 }
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68 GrowableArray<DeferredZeroCheck*>* deferred_zero_checks() {
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69 return &_deferred_zero_checks;
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70 }
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71 SharkStack* stack() const {
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72 return _stack;
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73 }
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74
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75 // On-stack replacement
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76 private:
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77 bool is_osr() const {
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78 return flow()->is_osr_flow();
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79 }
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80 const llvm::FunctionType* entry_point_type() const {
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81 if (is_osr())
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82 return SharkType::osr_entry_point_type();
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83 else
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84 return SharkType::entry_point_type();
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85 }
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86
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87 // Block management
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88 private:
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89 llvm::BasicBlock* _block_insertion_point;
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90
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91 void set_block_insertion_point(llvm::BasicBlock* block_insertion_point) {
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92 _block_insertion_point = block_insertion_point;
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93 }
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94 llvm::BasicBlock* block_insertion_point() const {
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95 return _block_insertion_point;
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96 }
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97
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98 public:
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99 llvm::BasicBlock* CreateBlock(const char* name = "") const {
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100 return llvm::BasicBlock::Create(
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101 SharkContext::current(), name, function(), block_insertion_point());
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102 }
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103
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104 // Deferred zero checks
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105 public:
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106 void add_deferred_zero_check(SharkTopLevelBlock* block,
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107 SharkValue* value);
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108
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109 private:
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110 void do_deferred_zero_checks();
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111 };
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