// Copyright 2013 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #include "hydrogen-escape-analysis.h" namespace v8 { namespace internal { void HEscapeAnalysisPhase::CollectIfNoEscapingUses(HInstruction* instr) { for (HUseIterator it(instr->uses()); !it.Done(); it.Advance()) { HValue* use = it.value(); if (use->HasEscapingOperandAt(it.index())) { if (FLAG_trace_escape_analysis) { PrintF("#%d (%s) escapes through #%d (%s) @%d\n", instr->id(), instr->Mnemonic(), use->id(), use->Mnemonic(), it.index()); } return; } } if (FLAG_trace_escape_analysis) { PrintF("#%d (%s) is being captured\n", instr->id(), instr->Mnemonic()); } captured_.Add(instr, zone()); } void HEscapeAnalysisPhase::CollectCapturedValues() { int block_count = graph()->blocks()->length(); for (int i = 0; i < block_count; ++i) { HBasicBlock* block = graph()->blocks()->at(i); for (HInstructionIterator it(block); !it.Done(); it.Advance()) { HInstruction* instr = it.Current(); if (instr->IsAllocate()) { CollectIfNoEscapingUses(instr); } } } } } } // namespace v8::internal