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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/compiler/bytecode-graph-builder.h" | 5 #include "src/compiler/bytecode-graph-builder.h" |
6 | 6 |
7 #include "src/ast/ast.h" | 7 #include "src/ast/ast.h" |
8 #include "src/ast/scopes.h" | 8 #include "src/ast/scopes.h" |
9 #include "src/compilation-info.h" | 9 #include "src/compilation-info.h" |
10 #include "src/compiler/bytecode-branch-analysis.h" | 10 #include "src/compiler/bytecode-branch-analysis.h" |
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497 invocation_frequency_(invocation_frequency), | 497 invocation_frequency_(invocation_frequency), |
498 bytecode_array_(handle(info->shared_info()->bytecode_array())), | 498 bytecode_array_(handle(info->shared_info()->bytecode_array())), |
499 exception_handler_table_( | 499 exception_handler_table_( |
500 handle(HandlerTable::cast(bytecode_array()->handler_table()))), | 500 handle(HandlerTable::cast(bytecode_array()->handler_table()))), |
501 feedback_vector_(handle(info->closure()->feedback_vector())), | 501 feedback_vector_(handle(info->closure()->feedback_vector())), |
502 frame_state_function_info_(common()->CreateFrameStateFunctionInfo( | 502 frame_state_function_info_(common()->CreateFrameStateFunctionInfo( |
503 FrameStateType::kInterpretedFunction, | 503 FrameStateType::kInterpretedFunction, |
504 bytecode_array()->parameter_count(), | 504 bytecode_array()->parameter_count(), |
505 bytecode_array()->register_count(), info->shared_info())), | 505 bytecode_array()->register_count(), info->shared_info())), |
506 osr_ast_id_(info->osr_ast_id()), | 506 osr_ast_id_(info->osr_ast_id()), |
| 507 osr_loop_offset_(-1), |
507 merge_environments_(local_zone), | 508 merge_environments_(local_zone), |
508 exception_handlers_(local_zone), | 509 exception_handlers_(local_zone), |
509 current_exception_handler_(0), | 510 current_exception_handler_(0), |
510 input_buffer_size_(0), | 511 input_buffer_size_(0), |
511 input_buffer_(nullptr), | 512 input_buffer_(nullptr), |
512 exit_controls_(local_zone), | 513 exit_controls_(local_zone), |
513 is_liveness_analysis_enabled_(FLAG_analyze_environment_liveness && | 514 is_liveness_analysis_enabled_(FLAG_analyze_environment_liveness && |
514 info->is_deoptimization_enabled()), | 515 info->is_deoptimization_enabled()), |
515 state_values_cache_(jsgraph), | 516 state_values_cache_(jsgraph), |
516 liveness_analyzer_( | 517 liveness_analyzer_( |
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1926 } | 1927 } |
1927 set_environment(nullptr); | 1928 set_environment(nullptr); |
1928 } | 1929 } |
1929 | 1930 |
1930 void BytecodeGraphBuilder::MergeControlToLeaveFunction(Node* exit) { | 1931 void BytecodeGraphBuilder::MergeControlToLeaveFunction(Node* exit) { |
1931 exit_controls_.push_back(exit); | 1932 exit_controls_.push_back(exit); |
1932 set_environment(nullptr); | 1933 set_environment(nullptr); |
1933 } | 1934 } |
1934 | 1935 |
1935 void BytecodeGraphBuilder::BuildOSRLoopEntryPoint(int current_offset) { | 1936 void BytecodeGraphBuilder::BuildOSRLoopEntryPoint(int current_offset) { |
1936 if (!osr_ast_id_.IsNone() && osr_ast_id_.ToInt() == current_offset) { | 1937 if (!osr_ast_id_.IsNone() && osr_loop_offset_ == current_offset) { |
1937 // For OSR add a special {OsrLoopEntry} node into the current loop header. | 1938 // For OSR add a special {OsrLoopEntry} node into the current loop header. |
1938 // It will be turned into a usable entry by the OSR deconstruction. | 1939 // It will be turned into a usable entry by the OSR deconstruction. |
1939 Environment* loop_env = merge_environments_[current_offset]; | 1940 Environment* loop_env = merge_environments_[current_offset]; |
1940 Environment* osr_env = loop_env->CopyForOsrEntry(); | 1941 Environment* osr_env = loop_env->CopyForOsrEntry(); |
1941 osr_env->PrepareForOsrEntry(); | 1942 osr_env->PrepareForOsrEntry(); |
1942 loop_env->Merge(osr_env); | 1943 loop_env->Merge(osr_env); |
1943 } | 1944 } |
1944 } | 1945 } |
1945 | 1946 |
1946 void BytecodeGraphBuilder::BuildOSRNormalEntryPoint() { | 1947 void BytecodeGraphBuilder::BuildOSRNormalEntryPoint() { |
1947 if (!osr_ast_id_.IsNone()) { | 1948 if (!osr_ast_id_.IsNone()) { |
1948 // For OSR add an {OsrNormalEntry} as the the top-level environment start. | 1949 // For OSR add an {OsrNormalEntry} as the the top-level environment start. |
1949 // It will be replaced with {Dead} by the OSR deconstruction. | 1950 // It will be replaced with {Dead} by the OSR deconstruction. |
1950 NewNode(common()->OsrNormalEntry()); | 1951 NewNode(common()->OsrNormalEntry()); |
1951 // Note that the requested OSR entry point must be the target of a backward | 1952 // Translate the offset of the jump instruction to the jump target offset of |
1952 // branch, otherwise there will not be a proper loop header available. | 1953 // that instruction so that the derived BailoutId points to the loop header. |
1953 DCHECK(branch_analysis()->backward_branches_target(osr_ast_id_.ToInt())); | 1954 osr_loop_offset_ = loop_analysis()->GetLoopOffsetFor(osr_ast_id_.ToInt()); |
| 1955 DCHECK(branch_analysis()->backward_branches_target(osr_loop_offset_)); |
1954 } | 1956 } |
1955 } | 1957 } |
1956 | 1958 |
1957 void BytecodeGraphBuilder::BuildLoopExitsForBranch(int target_offset) { | 1959 void BytecodeGraphBuilder::BuildLoopExitsForBranch(int target_offset) { |
1958 int origin_offset = bytecode_iterator().current_offset(); | 1960 int origin_offset = bytecode_iterator().current_offset(); |
1959 // Only build loop exits for forward edges. | 1961 // Only build loop exits for forward edges. |
1960 if (target_offset > origin_offset) { | 1962 if (target_offset > origin_offset) { |
1961 BuildLoopExitsUntilLoop(loop_analysis()->GetLoopOffsetFor(target_offset)); | 1963 BuildLoopExitsUntilLoop(loop_analysis()->GetLoopOffsetFor(target_offset)); |
1962 } | 1964 } |
1963 } | 1965 } |
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2233 source_positions_->set_current_position(it->source_position()); | 2235 source_positions_->set_current_position(it->source_position()); |
2234 it->Advance(); | 2236 it->Advance(); |
2235 } else { | 2237 } else { |
2236 DCHECK_GT(it->code_offset(), offset); | 2238 DCHECK_GT(it->code_offset(), offset); |
2237 } | 2239 } |
2238 } | 2240 } |
2239 | 2241 |
2240 } // namespace compiler | 2242 } // namespace compiler |
2241 } // namespace internal | 2243 } // namespace internal |
2242 } // namespace v8 | 2244 } // namespace v8 |
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