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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/196652">196652</a></dd>
<dt>Author</dt> <dd>fpizlo@apple.com</dd>
<dt>Date</dt> <dd>2016-02-16 13:12:04 -0800 (Tue, 16 Feb 2016)</dd>
</dl>
<h3>Log Message</h3>
<pre>FTL should support NewTypedArray
https://bugs.webkit.org/show_bug.cgi?id=154268
Reviewed by Saam Barati.
3% speed-up on pdfjs. This was already covered by many different tests.
* ftl/FTLCapabilities.cpp:
(JSC::FTL::canCompile):
* ftl/FTLLowerDFGToLLVM.cpp:
(JSC::FTL::DFG::LowerDFGToLLVM::compileNode):
(JSC::FTL::DFG::LowerDFGToLLVM::compileNewArrayWithSize):
(JSC::FTL::DFG::LowerDFGToLLVM::compileNewTypedArray):
(JSC::FTL::DFG::LowerDFGToLLVM::compileAllocatePropertyStorage):
(JSC::FTL::DFG::LowerDFGToLLVM::allocateBasicStorageAndGetEnd):
(JSC::FTL::DFG::LowerDFGToLLVM::allocateBasicStorage):
(JSC::FTL::DFG::LowerDFGToLLVM::allocateObject):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoreftlFTLCapabilitiescpp">trunk/Source/JavaScriptCore/ftl/FTLCapabilities.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreftlFTLLowerDFGToLLVMcpp">trunk/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (196651 => 196652)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog 2016-02-16 20:58:56 UTC (rev 196651)
+++ trunk/Source/JavaScriptCore/ChangeLog 2016-02-16 21:12:04 UTC (rev 196652)
</span><span class="lines">@@ -1,3 +1,23 @@
</span><ins>+2016-02-16 Filip Pizlo <fpizlo@apple.com>
+
+ FTL should support NewTypedArray
+ https://bugs.webkit.org/show_bug.cgi?id=154268
+
+ Reviewed by Saam Barati.
+
+ 3% speed-up on pdfjs. This was already covered by many different tests.
+
+ * ftl/FTLCapabilities.cpp:
+ (JSC::FTL::canCompile):
+ * ftl/FTLLowerDFGToLLVM.cpp:
+ (JSC::FTL::DFG::LowerDFGToLLVM::compileNode):
+ (JSC::FTL::DFG::LowerDFGToLLVM::compileNewArrayWithSize):
+ (JSC::FTL::DFG::LowerDFGToLLVM::compileNewTypedArray):
+ (JSC::FTL::DFG::LowerDFGToLLVM::compileAllocatePropertyStorage):
+ (JSC::FTL::DFG::LowerDFGToLLVM::allocateBasicStorageAndGetEnd):
+ (JSC::FTL::DFG::LowerDFGToLLVM::allocateBasicStorage):
+ (JSC::FTL::DFG::LowerDFGToLLVM::allocateObject):
+
</ins><span class="cx"> 2016-02-16 Saam barati <sbarati@apple.com>
</span><span class="cx">
</span><span class="cx"> stress/sampling-profiler-deep-stack.js fails on ARM 32bit
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreftlFTLCapabilitiescpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ftl/FTLCapabilities.cpp (196651 => 196652)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ftl/FTLCapabilities.cpp 2016-02-16 20:58:56 UTC (rev 196651)
+++ trunk/Source/JavaScriptCore/ftl/FTLCapabilities.cpp 2016-02-16 21:12:04 UTC (rev 196652)
</span><span class="lines">@@ -1,5 +1,5 @@
</span><span class="cx"> /*
</span><del>- * Copyright (C) 2013-2015 Apple Inc. All rights reserved.
</del><ins>+ * Copyright (C) 2013-2016 Apple Inc. All rights reserved.
</ins><span class="cx"> *
</span><span class="cx"> * Redistribution and use in source and binary forms, with or without
</span><span class="cx"> * modification, are permitted provided that the following conditions
</span><span class="lines">@@ -72,6 +72,7 @@
</span><span class="cx"> case NewObject:
</span><span class="cx"> case NewArray:
</span><span class="cx"> case NewArrayBuffer:
</span><ins>+ case NewTypedArray:
</ins><span class="cx"> case GetByOffset:
</span><span class="cx"> case GetGetterSetterByOffset:
</span><span class="cx"> case GetGetter:
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreftlFTLLowerDFGToLLVMcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp (196651 => 196652)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp 2016-02-16 20:58:56 UTC (rev 196651)
+++ trunk/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp 2016-02-16 21:12:04 UTC (rev 196652)
</span><span class="lines">@@ -845,6 +845,9 @@
</span><span class="cx"> case NewArrayWithSize:
</span><span class="cx"> compileNewArrayWithSize();
</span><span class="cx"> break;
</span><ins>+ case NewTypedArray:
+ compileNewTypedArray();
+ break;
</ins><span class="cx"> case GetTypedArrayByteOffset:
</span><span class="cx"> compileGetTypedArrayByteOffset();
</span><span class="cx"> break;
</span><span class="lines">@@ -4090,8 +4093,7 @@
</span><span class="cx">
</span><span class="cx"> LValue butterfly = m_out.sub(endOfStorage, payloadSize);
</span><span class="cx">
</span><del>- LValue object = allocateObject<JSArray>(
- structure, butterfly, failCase);
</del><ins>+ LValue object = allocateObject<JSArray>(structure, butterfly, failCase);
</ins><span class="cx">
</span><span class="cx"> m_out.store32(publicLength, butterfly, m_heaps.Butterfly_publicLength);
</span><span class="cx"> m_out.store32(vectorLength, butterfly, m_heaps.Butterfly_vectorLength);
</span><span class="lines">@@ -4159,6 +4161,63 @@
</span><span class="cx"> m_out.constIntPtr(structure));
</span><span class="cx"> setJSValue(vmCall(m_out.int64, m_out.operation(operationNewArrayWithSize), m_callFrame, structureValue, publicLength));
</span><span class="cx"> }
</span><ins>+
+ void compileNewTypedArray()
+ {
+ JSGlobalObject* globalObject = m_graph.globalObjectFor(m_node->origin.semantic);
+ TypedArrayType type = m_node->typedArrayType();
+ Structure* structure = globalObject->typedArrayStructure(type);
+
+ LValue size = lowInt32(m_node->child1());
+
+ LBasicBlock smallEnoughCase = FTL_NEW_BLOCK(m_out, ("NewTypedArray small enough case"));
+ LBasicBlock nonZeroCase = FTL_NEW_BLOCK(m_out, ("NewTypedArray non-zero case"));
+ LBasicBlock slowCase = FTL_NEW_BLOCK(m_out, ("NewTypedArray slow case"));
+ LBasicBlock continuation = FTL_NEW_BLOCK(m_out, ("NewTypedArray continuation"));
+
+ m_out.branch(
+ m_out.above(size, m_out.constInt32(JSArrayBufferView::fastSizeLimit)),
+ rarely(slowCase), usually(smallEnoughCase));
+
+ LBasicBlock lastNext = m_out.appendTo(smallEnoughCase, nonZeroCase);
+
+ m_out.branch(m_out.notZero32(size), usually(nonZeroCase), rarely(slowCase));
+
+ m_out.appendTo(nonZeroCase, slowCase);
+
+ LValue byteSize = m_out.shl(m_out.zeroExtPtr(size), m_out.constInt32(logElementSize(type)));
+ if (elementSize(type) < 8) {
+ byteSize = m_out.bitAnd(
+ m_out.add(byteSize, m_out.constIntPtr(7)),
+ m_out.constIntPtr(~static_cast<intptr_t>(7)));
+ }
+
+ LValue storage = allocateBasicStorage(byteSize, slowCase);
+
+ LValue fastResultValue = allocateObject<JSArrayBufferView>(structure, storage, slowCase);
+
+ m_out.storePtr(storage, fastResultValue, m_heaps.JSArrayBufferView_vector);
+ m_out.store32(size, fastResultValue, m_heaps.JSArrayBufferView_length);
+ m_out.store32(m_out.constInt32(FastTypedArray), fastResultValue, m_heaps.JSArrayBufferView_mode);
+
+ ValueFromBlock fastResult = m_out.anchor(fastResultValue);
+ m_out.jump(continuation);
+
+ m_out.appendTo(slowCase, continuation);
+
+ LValue slowResultValue = lazySlowPath(
+ [=] (const Vector<Location>& locations) -> RefPtr<LazySlowPath::Generator> {
+ return createLazyCallGenerator(
+ operationNewTypedArrayWithSizeForType(type), locations[0].directGPR(),
+ CCallHelpers::TrustedImmPtr(structure), locations[1].directGPR());
+ },
+ size);
+ ValueFromBlock slowResult = m_out.anchor(slowResultValue);
+ m_out.jump(continuation);
+
+ m_out.appendTo(continuation, lastNext);
+ setJSValue(m_out.phi(m_out.intPtr, fastResult, slowResult));
+ }
</ins><span class="cx">
</span><span class="cx"> void compileAllocatePropertyStorage()
</span><span class="cx"> {
</span><span class="lines">@@ -7932,6 +7991,11 @@
</span><span class="cx"> return m_out.sub(
</span><span class="cx"> m_out.loadPtr(m_out.absolute(&allocator.m_currentPayloadEnd)), newRemaining);
</span><span class="cx"> }
</span><ins>+
+ LValue allocateBasicStorage(LValue size, LBasicBlock slowPath)
+ {
+ return m_out.sub(allocateBasicStorageAndGetEnd(size, slowPath), size);
+ }
</ins><span class="cx">
</span><span class="cx"> LValue allocateObject(Structure* structure)
</span><span class="cx"> {
</span></span></pre>
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