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.
5 #ifndef V8_HYDROGEN_OSR_H_
6 #define V8_HYDROGEN_OSR_H_
15 // Responsible for building graph parts related to OSR and otherwise
16 // setting up the graph to do an OSR compile.
17 class HOsrBuilder : public ZoneObject {
19 explicit HOsrBuilder(HOptimizedGraphBuilder* builder)
20 : unoptimized_frame_slots_(0),
23 osr_loop_entry_(NULL),
26 // Creates the loop entry block for the given statement, setting up OSR
27 // entries as necessary, and sets the current block to the new block.
28 HBasicBlock* BuildOsrLoopEntry(IterationStatement* statement);
30 // Process the hydrogen graph after it has been completed, performing
31 // any OSR-specific cleanups or changes.
34 // Process the OSR values and phis after initial graph optimization.
35 void FinishOsrValues();
37 // Return the number of slots in the unoptimized frame at the entry to OSR.
38 int UnoptimizedFrameSlots() const {
39 return unoptimized_frame_slots_;
42 bool HasOsrEntryAt(IterationStatement* statement);
45 int unoptimized_frame_slots_;
46 HOptimizedGraphBuilder* builder_;
47 HBasicBlock* osr_entry_;
48 HBasicBlock* osr_loop_entry_;
49 ZoneList<HUnknownOSRValue*>* osr_values_;
52 } } // namespace v8::internal
54 #endif // V8_HYDROGEN_OSR_H_