Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5 | #include "src/compiler/control-builders.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 6 | |
| 7 | namespace v8 { |
| 8 | namespace internal { |
| 9 | namespace compiler { |
| 10 | |
| 11 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 12 | void IfBuilder::If(Node* condition, BranchHint hint) { |
| 13 | builder_->NewBranch(condition, hint); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 14 | else_environment_ = environment()->CopyForConditional(); |
| 15 | } |
| 16 | |
| 17 | |
| 18 | void IfBuilder::Then() { builder_->NewIfTrue(); } |
| 19 | |
| 20 | |
| 21 | void IfBuilder::Else() { |
| 22 | builder_->NewMerge(); |
| 23 | then_environment_ = environment(); |
| 24 | set_environment(else_environment_); |
| 25 | builder_->NewIfFalse(); |
| 26 | } |
| 27 | |
| 28 | |
| 29 | void IfBuilder::End() { |
| 30 | then_environment_->Merge(environment()); |
| 31 | set_environment(then_environment_); |
| 32 | } |
| 33 | |
| 34 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 35 | void LoopBuilder::BeginLoop(BitVector* assigned, bool is_osr) { |
| 36 | loop_environment_ = environment()->CopyForLoop(assigned, is_osr); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 37 | continue_environment_ = environment()->CopyAsUnreachable(); |
| 38 | break_environment_ = environment()->CopyAsUnreachable(); |
| 39 | } |
| 40 | |
| 41 | |
| 42 | void LoopBuilder::Continue() { |
| 43 | continue_environment_->Merge(environment()); |
| 44 | environment()->MarkAsUnreachable(); |
| 45 | } |
| 46 | |
| 47 | |
| 48 | void LoopBuilder::Break() { |
| 49 | break_environment_->Merge(environment()); |
| 50 | environment()->MarkAsUnreachable(); |
| 51 | } |
| 52 | |
| 53 | |
| 54 | void LoopBuilder::EndBody() { |
| 55 | continue_environment_->Merge(environment()); |
| 56 | set_environment(continue_environment_); |
| 57 | } |
| 58 | |
| 59 | |
| 60 | void LoopBuilder::EndLoop() { |
| 61 | loop_environment_->Merge(environment()); |
| 62 | set_environment(break_environment_); |
| 63 | } |
| 64 | |
| 65 | |
| 66 | void LoopBuilder::BreakUnless(Node* condition) { |
| 67 | IfBuilder control_if(builder_); |
| 68 | control_if.If(condition); |
| 69 | control_if.Then(); |
| 70 | control_if.Else(); |
| 71 | Break(); |
| 72 | control_if.End(); |
| 73 | } |
| 74 | |
| 75 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 76 | void LoopBuilder::BreakWhen(Node* condition) { |
| 77 | IfBuilder control_if(builder_); |
| 78 | control_if.If(condition); |
| 79 | control_if.Then(); |
| 80 | Break(); |
| 81 | control_if.Else(); |
| 82 | control_if.End(); |
| 83 | } |
| 84 | |
| 85 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 86 | void SwitchBuilder::BeginSwitch() { |
| 87 | body_environment_ = environment()->CopyAsUnreachable(); |
| 88 | label_environment_ = environment()->CopyAsUnreachable(); |
| 89 | break_environment_ = environment()->CopyAsUnreachable(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | |
| 93 | void SwitchBuilder::BeginLabel(int index, Node* condition) { |
| 94 | builder_->NewBranch(condition); |
| 95 | label_environment_ = environment()->CopyForConditional(); |
| 96 | builder_->NewIfTrue(); |
| 97 | body_environments_[index] = environment(); |
| 98 | } |
| 99 | |
| 100 | |
| 101 | void SwitchBuilder::EndLabel() { |
| 102 | set_environment(label_environment_); |
| 103 | builder_->NewIfFalse(); |
| 104 | } |
| 105 | |
| 106 | |
| 107 | void SwitchBuilder::DefaultAt(int index) { |
| 108 | label_environment_ = environment()->CopyAsUnreachable(); |
| 109 | body_environments_[index] = environment(); |
| 110 | } |
| 111 | |
| 112 | |
| 113 | void SwitchBuilder::BeginCase(int index) { |
| 114 | set_environment(body_environments_[index]); |
| 115 | environment()->Merge(body_environment_); |
| 116 | } |
| 117 | |
| 118 | |
| 119 | void SwitchBuilder::Break() { |
| 120 | break_environment_->Merge(environment()); |
| 121 | environment()->MarkAsUnreachable(); |
| 122 | } |
| 123 | |
| 124 | |
| 125 | void SwitchBuilder::EndCase() { body_environment_ = environment(); } |
| 126 | |
| 127 | |
| 128 | void SwitchBuilder::EndSwitch() { |
| 129 | break_environment_->Merge(label_environment_); |
| 130 | break_environment_->Merge(environment()); |
| 131 | set_environment(break_environment_); |
| 132 | } |
| 133 | |
| 134 | |
| 135 | void BlockBuilder::BeginBlock() { |
| 136 | break_environment_ = environment()->CopyAsUnreachable(); |
| 137 | } |
| 138 | |
| 139 | |
| 140 | void BlockBuilder::Break() { |
| 141 | break_environment_->Merge(environment()); |
| 142 | environment()->MarkAsUnreachable(); |
| 143 | } |
| 144 | |
| 145 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 146 | void BlockBuilder::BreakWhen(Node* condition, BranchHint hint) { |
| 147 | IfBuilder control_if(builder_); |
| 148 | control_if.If(condition, hint); |
| 149 | control_if.Then(); |
| 150 | Break(); |
| 151 | control_if.Else(); |
| 152 | control_if.End(); |
| 153 | } |
| 154 | |
| 155 | |
| 156 | void BlockBuilder::BreakUnless(Node* condition, BranchHint hint) { |
| 157 | IfBuilder control_if(builder_); |
| 158 | control_if.If(condition, hint); |
| 159 | control_if.Then(); |
| 160 | control_if.Else(); |
| 161 | Break(); |
| 162 | control_if.End(); |
| 163 | } |
| 164 | |
| 165 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 166 | void BlockBuilder::EndBlock() { |
| 167 | break_environment_->Merge(environment()); |
| 168 | set_environment(break_environment_); |
| 169 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 170 | |
| 171 | |
| 172 | void TryCatchBuilder::BeginTry() { |
| 173 | exit_environment_ = environment()->CopyAsUnreachable(); |
| 174 | catch_environment_ = environment()->CopyAsUnreachable(); |
| 175 | catch_environment_->Push(the_hole()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 176 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 177 | |
| 178 | |
| 179 | void TryCatchBuilder::Throw(Node* exception) { |
| 180 | environment()->Push(exception); |
| 181 | catch_environment_->Merge(environment()); |
| 182 | environment()->Pop(); |
| 183 | environment()->MarkAsUnreachable(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 184 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 185 | |
| 186 | |
| 187 | void TryCatchBuilder::EndTry() { |
| 188 | exit_environment_->Merge(environment()); |
| 189 | exception_node_ = catch_environment_->Pop(); |
| 190 | set_environment(catch_environment_); |
| 191 | } |
| 192 | |
| 193 | |
| 194 | void TryCatchBuilder::EndCatch() { |
| 195 | exit_environment_->Merge(environment()); |
| 196 | set_environment(exit_environment_); |
| 197 | } |
| 198 | |
| 199 | |
| 200 | void TryFinallyBuilder::BeginTry() { |
| 201 | finally_environment_ = environment()->CopyAsUnreachable(); |
| 202 | finally_environment_->Push(the_hole()); |
| 203 | finally_environment_->Push(the_hole()); |
| 204 | } |
| 205 | |
| 206 | |
| 207 | void TryFinallyBuilder::LeaveTry(Node* token, Node* value) { |
| 208 | environment()->Push(value); |
| 209 | environment()->Push(token); |
| 210 | finally_environment_->Merge(environment()); |
| 211 | environment()->Drop(2); |
| 212 | } |
| 213 | |
| 214 | |
| 215 | void TryFinallyBuilder::EndTry(Node* fallthrough_token, Node* value) { |
| 216 | environment()->Push(value); |
| 217 | environment()->Push(fallthrough_token); |
| 218 | finally_environment_->Merge(environment()); |
| 219 | environment()->Drop(2); |
| 220 | token_node_ = finally_environment_->Pop(); |
| 221 | value_node_ = finally_environment_->Pop(); |
| 222 | set_environment(finally_environment_); |
| 223 | } |
| 224 | |
| 225 | |
| 226 | void TryFinallyBuilder::EndFinally() { |
| 227 | // Nothing to be done here. |
| 228 | } |
| 229 | |
| 230 | } // namespace compiler |
| 231 | } // namespace internal |
| 232 | } // namespace v8 |