35052bc2ea
This essentially relands r14930 and r14935 with adaptions to the current code base. It models the instantiation of an implicit receiver for CallNew nodes in hydrogen using HAllocate together with generic stores instead of one specialized HAllocateObject instruction, hence creating a single choking point for inlined allocation in optimized code. R=hpayer@chromium.org Review URL: https://codereview.chromium.org/19207002 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15673 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
67 lines
2.6 KiB
C++
67 lines
2.6 KiB
C++
// Copyright 2013 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "hydrogen-escape-analysis.h"
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namespace v8 {
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namespace internal {
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void HEscapeAnalysisPhase::CollectIfNoEscapingUses(HInstruction* instr) {
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for (HUseIterator it(instr->uses()); !it.Done(); it.Advance()) {
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HValue* use = it.value();
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if (use->HasEscapingOperandAt(it.index())) {
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if (FLAG_trace_escape_analysis) {
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PrintF("#%d (%s) escapes through #%d (%s) @%d\n", instr->id(),
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instr->Mnemonic(), use->id(), use->Mnemonic(), it.index());
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}
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return;
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}
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}
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if (FLAG_trace_escape_analysis) {
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PrintF("#%d (%s) is being captured\n", instr->id(), instr->Mnemonic());
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}
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captured_.Add(instr, zone());
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}
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void HEscapeAnalysisPhase::CollectCapturedValues() {
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int block_count = graph()->blocks()->length();
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for (int i = 0; i < block_count; ++i) {
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HBasicBlock* block = graph()->blocks()->at(i);
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for (HInstructionIterator it(block); !it.Done(); it.Advance()) {
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HInstruction* instr = it.Current();
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if (instr->IsAllocate()) {
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CollectIfNoEscapingUses(instr);
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}
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}
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}
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}
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} } // namespace v8::internal
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