Uniform and precise source positions for inlining

src/compiler/bytecode-graph-builder.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/bytecode-graph-builder.h"
 
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
 #include "src/compilation-info.h"
 #include "src/compiler/bytecode-branch-analysis.h"
+#include "src/compiler/compiler-source-position-table.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/operator-properties.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/objects-inl.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // The abstract execution environment simulates the content of the interpreter
@@ skipping 463 matching lines @@
     } else {
       liveness_block()->Checkpoint(result);
     }
   }
 
   return result;
 }
 
 BytecodeGraphBuilder::BytecodeGraphBuilder(
     Zone* local_zone, CompilationInfo* info, JSGraph* jsgraph,
-    float invocation_frequency, SourcePositionTable* source_positions)
+    float invocation_frequency, SourcePositionTable* source_positions,
+    int inlining_id)
     : local_zone_(local_zone),
       jsgraph_(jsgraph),
       invocation_frequency_(invocation_frequency),
       bytecode_array_(handle(info->shared_info()->bytecode_array())),
       exception_handler_table_(
           handle(HandlerTable::cast(bytecode_array()->handler_table()))),
       feedback_vector_(handle(info->closure()->feedback_vector())),
       frame_state_function_info_(common()->CreateFrameStateFunctionInfo(
           FrameStateType::kInterpretedFunction,
           bytecode_array()->parameter_count(),
           bytecode_array()->register_count(), info->shared_info())),
       osr_ast_id_(info->osr_ast_id()),
       merge_environments_(local_zone),
       exception_handlers_(local_zone),
       current_exception_handler_(0),
       input_buffer_size_(0),
       input_buffer_(nullptr),
       exit_controls_(local_zone),
       is_liveness_analysis_enabled_(FLAG_analyze_environment_liveness &&
                                     info->is_deoptimization_enabled()),
       state_values_cache_(jsgraph),
       liveness_analyzer_(
           static_cast<size_t>(bytecode_array()->register_count()), true,
           local_zone),
-      source_positions_(source_positions) {}
+      source_positions_(source_positions),
+      start_position_(info->shared_info()->start_position(), inlining_id) {}
 
 Node* BytecodeGraphBuilder::GetNewTarget() {
   if (!new_target_.is_set()) {
     int params = bytecode_array()->parameter_count();
     int index = Linkage::GetJSCallNewTargetParamIndex(params);
     const Operator* op = common()->Parameter(index, "%new.target");
     Node* node = NewNode(op, graph()->start());
     new_target_.set(node);
   }
   return new_target_.get();
@@ skipping 33 matching lines @@
 
 VectorSlotPair BytecodeGraphBuilder::CreateVectorSlotPair(int slot_id) {
   FeedbackVectorSlot slot;
   if (slot_id >= TypeFeedbackVector::kReservedIndexCount) {
     slot = feedback_vector()->ToSlot(slot_id);
   }
   return VectorSlotPair(feedback_vector(), slot);
 }
 
 bool BytecodeGraphBuilder::CreateGraph(bool stack_check) {
+  SourcePositionTable::Scope pos_scope(source_positions_, start_position_);
+
   // Set up the basic structure of the graph. Outputs for {Start} are the formal
   // parameters (including the receiver) plus new target, number of arguments,
   // context and closure.
   int actual_parameter_count = bytecode_array()->parameter_count() + 4;
   graph()->SetStart(graph()->NewNode(common()->Start(actual_parameter_count)));
 
   Environment env(this, bytecode_array()->register_count(),
                   bytecode_array()->parameter_count(), graph()->start(),
                   GetFunctionContext());
   set_environment(&env);
@@ skipping 1607 matching lines @@
   } else if (value != other) {
     // Phi does not exist yet, introduce one.
     value = NewPhi(inputs, value, control);
     value->ReplaceInput(inputs - 1, other);
   }
   return value;
 }
 
 void BytecodeGraphBuilder::UpdateCurrentSourcePosition(
     SourcePositionTableIterator* it, int offset) {
-  // TODO(neis): Remove this once inlining supports source positions.
-  if (source_positions_ == nullptr) return;
-
   if (it->done()) return;
 
   if (it->code_offset() == offset) {
-    source_positions_->set_current_position(it->source_position());
+    source_positions_->SetCurrentPosition(SourcePosition(
+        it->source_position().ScriptOffset(), start_position_.InliningId()));
     it->Advance();
   } else {
     DCHECK_GT(it->code_offset(), offset);
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8