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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/162866">162866</a></dd>
<dt>Author</dt> <dd>fpizlo@apple.com</dd>
<dt>Date</dt> <dd>2014-01-27 13:52:39 -0800 (Mon, 27 Jan 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>FTL should support NewArrayWithSize
https://bugs.webkit.org/show_bug.cgi?id=127698
Reviewed by Mark Hahnenberg.
* ftl/FTLCapabilities.cpp:
(JSC::FTL::canCompile):
* ftl/FTLLowerDFGToLLVM.cpp:
(JSC::FTL::LowerDFGToLLVM::compileNode):
(JSC::FTL::LowerDFGToLLVM::compileNewArrayWithSize):
* tests/stress/new-array-storage-array-with-size.js: Added.
(foo):
(test):
* tests/stress/new-array-with-size-with-bad-time.js: Added.
(foo):
* tests/stress/new-contiguous-array-with-size.js: Added.
(foo):
(test):
* tests/stress/new-double-array-with-size.js: Added.
(foo):
(test):
* tests/stress/new-int32-array-with-size.js: Added.
(foo):
(test):
* tests/stress/new-undecided-array-with-size.js: Added.
(foo):
(test):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#branchesjsCStackSourceJavaScriptCoreChangeLog">branches/jsCStack/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#branchesjsCStackSourceJavaScriptCoreftlFTLCapabilitiescpp">branches/jsCStack/Source/JavaScriptCore/ftl/FTLCapabilities.cpp</a></li>
<li><a href="#branchesjsCStackSourceJavaScriptCoreftlFTLLowerDFGToLLVMcpp">branches/jsCStack/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#branchesjsCStackSourceJavaScriptCoretestsstressnewarraystoragearraywithsizejs">branches/jsCStack/Source/JavaScriptCore/tests/stress/new-array-storage-array-with-size.js</a></li>
<li><a href="#branchesjsCStackSourceJavaScriptCoretestsstressnewarraywithsizewithbadtimejs">branches/jsCStack/Source/JavaScriptCore/tests/stress/new-array-with-size-with-bad-time.js</a></li>
<li><a href="#branchesjsCStackSourceJavaScriptCoretestsstressnewcontiguousarraywithsizejs">branches/jsCStack/Source/JavaScriptCore/tests/stress/new-contiguous-array-with-size.js</a></li>
<li><a href="#branchesjsCStackSourceJavaScriptCoretestsstressnewdoublearraywithsizejs">branches/jsCStack/Source/JavaScriptCore/tests/stress/new-double-array-with-size.js</a></li>
<li><a href="#branchesjsCStackSourceJavaScriptCoretestsstressnewint32arraywithsizejs">branches/jsCStack/Source/JavaScriptCore/tests/stress/new-int32-array-with-size.js</a></li>
<li><a href="#branchesjsCStackSourceJavaScriptCoretestsstressnewundecidedarraywithsizejs">branches/jsCStack/Source/JavaScriptCore/tests/stress/new-undecided-array-with-size.js</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="branchesjsCStackSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: branches/jsCStack/Source/JavaScriptCore/ChangeLog (162865 => 162866)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsCStack/Source/JavaScriptCore/ChangeLog 2014-01-27 21:45:10 UTC (rev 162865)
+++ branches/jsCStack/Source/JavaScriptCore/ChangeLog 2014-01-27 21:52:39 UTC (rev 162866)
</span><span class="lines">@@ -1,3 +1,33 @@
</span><ins>+2014-01-27 Filip Pizlo <fpizlo@apple.com>
+
+ FTL should support NewArrayWithSize
+ https://bugs.webkit.org/show_bug.cgi?id=127698
+
+ Reviewed by Mark Hahnenberg.
+
+ * ftl/FTLCapabilities.cpp:
+ (JSC::FTL::canCompile):
+ * ftl/FTLLowerDFGToLLVM.cpp:
+ (JSC::FTL::LowerDFGToLLVM::compileNode):
+ (JSC::FTL::LowerDFGToLLVM::compileNewArrayWithSize):
+ * tests/stress/new-array-storage-array-with-size.js: Added.
+ (foo):
+ (test):
+ * tests/stress/new-array-with-size-with-bad-time.js: Added.
+ (foo):
+ * tests/stress/new-contiguous-array-with-size.js: Added.
+ (foo):
+ (test):
+ * tests/stress/new-double-array-with-size.js: Added.
+ (foo):
+ (test):
+ * tests/stress/new-int32-array-with-size.js: Added.
+ (foo):
+ (test):
+ * tests/stress/new-undecided-array-with-size.js: Added.
+ (foo):
+ (test):
+
</ins><span class="cx"> 2014-01-27 Michael Saboff <msaboff@apple.com>
</span><span class="cx">
</span><span class="cx"> CStack Branch: [X86-32] testapi crashes in gatherConservativeRoots()
</span></span></pre></div>
<a id="branchesjsCStackSourceJavaScriptCoreftlFTLCapabilitiescpp"></a>
<div class="modfile"><h4>Modified: branches/jsCStack/Source/JavaScriptCore/ftl/FTLCapabilities.cpp (162865 => 162866)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsCStack/Source/JavaScriptCore/ftl/FTLCapabilities.cpp 2014-01-27 21:45:10 UTC (rev 162865)
+++ branches/jsCStack/Source/JavaScriptCore/ftl/FTLCapabilities.cpp 2014-01-27 21:52:39 UTC (rev 162866)
</span><span class="lines">@@ -130,6 +130,7 @@
</span><span class="cx"> case GetCallee:
</span><span class="cx"> case ToString:
</span><span class="cx"> case MakeRope:
</span><ins>+ case NewArrayWithSize:
</ins><span class="cx"> // These are OK.
</span><span class="cx"> break;
</span><span class="cx"> case GetById:
</span></span></pre></div>
<a id="branchesjsCStackSourceJavaScriptCoreftlFTLLowerDFGToLLVMcpp"></a>
<div class="modfile"><h4>Modified: branches/jsCStack/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp (162865 => 162866)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsCStack/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp 2014-01-27 21:45:10 UTC (rev 162865)
+++ branches/jsCStack/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp 2014-01-27 21:52:39 UTC (rev 162866)
</span><span class="lines">@@ -423,6 +423,9 @@
</span><span class="cx"> case NewArrayBuffer:
</span><span class="cx"> compileNewArrayBuffer();
</span><span class="cx"> break;
</span><ins>+ case NewArrayWithSize:
+ compileNewArrayWithSize();
+ break;
</ins><span class="cx"> case AllocatePropertyStorage:
</span><span class="cx"> compileAllocatePropertyStorage();
</span><span class="cx"> break;
</span><span class="lines">@@ -2237,6 +2240,109 @@
</span><span class="cx"> m_out.constIntPtr(m_node->numConstants())));
</span><span class="cx"> }
</span><span class="cx">
</span><ins>+ void compileNewArrayWithSize()
+ {
+ LValue publicLength = lowInt32(m_node->child1());
+
+ JSGlobalObject* globalObject = m_graph.globalObjectFor(m_node->codeOrigin);
+ Structure* structure = globalObject->arrayStructureForIndexingTypeDuringAllocation(
+ m_node->indexingType());
+
+ if (!globalObject->isHavingABadTime() && !hasArrayStorage(m_node->indexingType())) {
+ ASSERT(
+ hasUndecided(structure->indexingType())
+ || hasInt32(structure->indexingType())
+ || hasDouble(structure->indexingType())
+ || hasContiguous(structure->indexingType()));
+
+ LBasicBlock fastCase = FTL_NEW_BLOCK(m_out, ("NewArrayWithSize fast case"));
+ LBasicBlock largeCase = FTL_NEW_BLOCK(m_out, ("NewArrayWithSize large case"));
+ LBasicBlock failCase = FTL_NEW_BLOCK(m_out, ("NewArrayWithSize fail case"));
+ LBasicBlock slowCase = FTL_NEW_BLOCK(m_out, ("NewArrayWithSize slow case"));
+ LBasicBlock continuation = FTL_NEW_BLOCK(m_out, ("NewArrayWithSize continuation"));
+
+ m_out.branch(
+ m_out.aboveOrEqual(publicLength, m_out.constInt32(MIN_SPARSE_ARRAY_INDEX)),
+ largeCase, fastCase);
+
+ LBasicBlock lastNext = m_out.appendTo(fastCase, largeCase);
+
+ // We don't round up to BASE_VECTOR_LEN for new Array(blah).
+ LValue vectorLength = publicLength;
+
+ LValue payloadSize =
+ m_out.shl(m_out.zeroExt(vectorLength, m_out.intPtr), m_out.constIntPtr(3));
+
+ LValue butterflySize = m_out.add(
+ payloadSize, m_out.constIntPtr(sizeof(IndexingHeader)));
+
+ LValue endOfStorage = allocateBasicStorageAndGetEnd(butterflySize, failCase);
+
+ LValue butterfly = m_out.sub(endOfStorage, payloadSize);
+
+ LValue object = allocateObject<JSArray>(
+ m_out.constIntPtr(structure), butterfly, failCase);
+
+ m_out.store32(publicLength, butterfly, m_heaps.Butterfly_publicLength);
+ m_out.store32(vectorLength, butterfly, m_heaps.Butterfly_vectorLength);
+
+ if (hasDouble(m_node->indexingType())) {
+ LBasicBlock initLoop = FTL_NEW_BLOCK(m_out, ("NewArrayWithSize double init loop"));
+ LBasicBlock initDone = FTL_NEW_BLOCK(m_out, ("NewArrayWithSize double init done"));
+
+ ValueFromBlock originalIndex = m_out.anchor(vectorLength);
+ ValueFromBlock originalPointer = m_out.anchor(butterfly);
+ m_out.branch(m_out.notZero32(vectorLength), initLoop, initDone);
+
+ LBasicBlock initLastNext = m_out.appendTo(initLoop, initDone);
+ LValue index = m_out.phi(m_out.int32, originalIndex);
+ LValue pointer = m_out.phi(m_out.intPtr, originalPointer);
+
+ m_out.store64(
+ m_out.constInt64(bitwise_cast<int64_t>(QNaN)),
+ TypedPointer(m_heaps.indexedDoubleProperties.atAnyIndex(), pointer));
+
+ LValue nextIndex = m_out.sub(index, m_out.int32One);
+ addIncoming(index, m_out.anchor(nextIndex));
+ addIncoming(pointer, m_out.anchor(m_out.add(pointer, m_out.intPtrEight)));
+ m_out.branch(m_out.notZero32(nextIndex), initLoop, initDone);
+
+ m_out.appendTo(initDone, initLastNext);
+ }
+
+ ValueFromBlock fastResult = m_out.anchor(object);
+ m_out.jump(continuation);
+
+ m_out.appendTo(largeCase, failCase);
+ ValueFromBlock largeStructure = m_out.anchor(m_out.constIntPtr(
+ globalObject->arrayStructureForIndexingTypeDuringAllocation(ArrayWithArrayStorage)));
+ m_out.jump(slowCase);
+
+ m_out.appendTo(failCase, slowCase);
+ ValueFromBlock failStructure = m_out.anchor(m_out.constIntPtr(structure));
+ m_out.jump(slowCase);
+
+ m_out.appendTo(slowCase, continuation);
+ LValue structureValue = m_out.phi(
+ m_out.intPtr, largeStructure, failStructure);
+ ValueFromBlock slowResult = m_out.anchor(vmCall(
+ m_out.operation(operationNewArrayWithSize),
+ m_callFrame, structureValue, publicLength));
+ m_out.jump(continuation);
+
+ m_out.appendTo(continuation, lastNext);
+ setJSValue(m_out.phi(m_out.intPtr, fastResult, slowResult));
+ return;
+ }
+
+ LValue structureValue = m_out.select(
+ m_out.aboveOrEqual(publicLength, m_out.constInt32(MIN_SPARSE_ARRAY_INDEX)),
+ m_out.constIntPtr(
+ globalObject->arrayStructureForIndexingTypeDuringAllocation(ArrayWithArrayStorage)),
+ m_out.constIntPtr(structure));
+ setJSValue(vmCall(m_out.operation(operationNewArrayWithSize), m_callFrame, structureValue, publicLength));
+ }
+
</ins><span class="cx"> void compileAllocatePropertyStorage()
</span><span class="cx"> {
</span><span class="cx"> StructureTransitionData& data = m_node->structureTransitionData();
</span></span></pre></div>
<a id="branchesjsCStackSourceJavaScriptCoretestsstressnewarraystoragearraywithsizejs"></a>
<div class="addfile"><h4>Added: branches/jsCStack/Source/JavaScriptCore/tests/stress/new-array-storage-array-with-size.js (0 => 162866)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsCStack/Source/JavaScriptCore/tests/stress/new-array-storage-array-with-size.js (rev 0)
+++ branches/jsCStack/Source/JavaScriptCore/tests/stress/new-array-storage-array-with-size.js 2014-01-27 21:52:39 UTC (rev 162866)
</span><span class="lines">@@ -0,0 +1,23 @@
</span><ins>+function foo(x) {
+ return new Array(x);
+}
+
+noInline(foo);
+
+function test(size) {
+ var result = foo(size);
+ if (result.length != size)
+ throw "Error: bad result: " + result;
+ var sawThings = false;
+ for (var s in result)
+ sawThings = true;
+ if (sawThings)
+ throw "Error: array is in bad state: " + result;
+ result[0] = "42.5";
+ if (result[0] != "42.5")
+ throw "Error: array is in wierd state: " + result;
+}
+
+for (var i = 0; i < 100000; ++i) {
+ test(1000000);
+}
</ins></span></pre></div>
<a id="branchesjsCStackSourceJavaScriptCoretestsstressnewarraywithsizewithbadtimejs"></a>
<div class="addfile"><h4>Added: branches/jsCStack/Source/JavaScriptCore/tests/stress/new-array-with-size-with-bad-time.js (0 => 162866)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsCStack/Source/JavaScriptCore/tests/stress/new-array-with-size-with-bad-time.js (rev 0)
+++ branches/jsCStack/Source/JavaScriptCore/tests/stress/new-array-with-size-with-bad-time.js 2014-01-27 21:52:39 UTC (rev 162866)
</span><span class="lines">@@ -0,0 +1,34 @@
</span><ins>+function foo(x) {
+ return new Array(x);
+}
+
+noInline(foo);
+
+var poke;
+Array.prototype.__defineSetter__("1", function() {
+ poke = "poke";
+});
+
+function test(size) {
+ var result = foo(size);
+ if (result.length != size)
+ throw "Error: bad result: " + result;
+ var sawThings = false;
+ for (var s in result) {
+ if (s != "1")
+ sawThings = true;
+ }
+ if (sawThings)
+ throw "Error: array is in bad state: " + result;
+ result[0] = "42.5";
+ if (result[0] != "42.5")
+ throw "Error: array is in wierd state: " + result;
+ poke = null;
+ result[1] = 42;
+ if (poke != "poke")
+ throw "Error: setter not called.";
+}
+
+for (var i = 0; i < 100000; ++i) {
+ test(42);
+}
</ins></span></pre></div>
<a id="branchesjsCStackSourceJavaScriptCoretestsstressnewcontiguousarraywithsizejs"></a>
<div class="addfile"><h4>Added: branches/jsCStack/Source/JavaScriptCore/tests/stress/new-contiguous-array-with-size.js (0 => 162866)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsCStack/Source/JavaScriptCore/tests/stress/new-contiguous-array-with-size.js (rev 0)
+++ branches/jsCStack/Source/JavaScriptCore/tests/stress/new-contiguous-array-with-size.js 2014-01-27 21:52:39 UTC (rev 162866)
</span><span class="lines">@@ -0,0 +1,31 @@
</span><ins>+function foo(x) {
+ return new Array(x);
+}
+
+noInline(foo);
+
+function test(size) {
+ var result = foo(size);
+ if (result.length != size) {
+ print("Got a weird length: " + result.length);
+ throw "Error: bad result: " + result;
+ }
+ var sawThings = false;
+ for (var s in result)
+ sawThings = true;
+ if (sawThings) {
+ print("Saw things!");
+ throw "Error: array is in bad state: " + result;
+ }
+ result[0] = "42.5";
+ if (result[0] != "42.5") {
+ print("Didn't store what I thought I stored.");
+ throw "Error: array is in wierd state: " + result;
+ }
+}
+
+for (var i = 0; i < 100000; ++i) {
+ test(0);
+ test(1);
+ test(42);
+}
</ins></span></pre></div>
<a id="branchesjsCStackSourceJavaScriptCoretestsstressnewdoublearraywithsizejs"></a>
<div class="addfile"><h4>Added: branches/jsCStack/Source/JavaScriptCore/tests/stress/new-double-array-with-size.js (0 => 162866)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsCStack/Source/JavaScriptCore/tests/stress/new-double-array-with-size.js (rev 0)
+++ branches/jsCStack/Source/JavaScriptCore/tests/stress/new-double-array-with-size.js 2014-01-27 21:52:39 UTC (rev 162866)
</span><span class="lines">@@ -0,0 +1,25 @@
</span><ins>+function foo(x) {
+ return new Array(x);
+}
+
+noInline(foo);
+
+function test(size) {
+ var result = foo(size);
+ if (result.length != size)
+ throw "Error: bad result: " + result;
+ var sawThings = false;
+ for (var s in result)
+ sawThings = true;
+ if (sawThings)
+ throw "Error: array is in bad state: " + result;
+ result[0] = 42.5;
+ if (result[0] != 42.5)
+ throw "Error: array is in wierd state: " + result;
+}
+
+for (var i = 0; i < 100000; ++i) {
+ test(0);
+ test(1);
+ test(42);
+}
</ins></span></pre></div>
<a id="branchesjsCStackSourceJavaScriptCoretestsstressnewint32arraywithsizejs"></a>
<div class="addfile"><h4>Added: branches/jsCStack/Source/JavaScriptCore/tests/stress/new-int32-array-with-size.js (0 => 162866)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsCStack/Source/JavaScriptCore/tests/stress/new-int32-array-with-size.js (rev 0)
+++ branches/jsCStack/Source/JavaScriptCore/tests/stress/new-int32-array-with-size.js 2014-01-27 21:52:39 UTC (rev 162866)
</span><span class="lines">@@ -0,0 +1,25 @@
</span><ins>+function foo(x) {
+ return new Array(x);
+}
+
+noInline(foo);
+
+function test(size) {
+ var result = foo(size);
+ if (result.length != size)
+ throw "Error: bad result: " + result;
+ var sawThings = false;
+ for (var s in result)
+ sawThings = true;
+ if (sawThings)
+ throw "Error: array is in bad state: " + result;
+ result[0] = 42;
+ if (result[0] != 42)
+ throw "Error: array is in wierd state: " + result;
+}
+
+for (var i = 0; i < 100000; ++i) {
+ test(0);
+ test(1);
+ test(42);
+}
</ins></span></pre></div>
<a id="branchesjsCStackSourceJavaScriptCoretestsstressnewundecidedarraywithsizejs"></a>
<div class="addfile"><h4>Added: branches/jsCStack/Source/JavaScriptCore/tests/stress/new-undecided-array-with-size.js (0 => 162866)</h4>
<pre class="diff"><span>
<span class="info">--- branches/jsCStack/Source/JavaScriptCore/tests/stress/new-undecided-array-with-size.js (rev 0)
+++ branches/jsCStack/Source/JavaScriptCore/tests/stress/new-undecided-array-with-size.js 2014-01-27 21:52:39 UTC (rev 162866)
</span><span class="lines">@@ -0,0 +1,22 @@
</span><ins>+function foo(x) {
+ return new Array(x);
+}
+
+noInline(foo);
+
+function test(size) {
+ var result = foo(size);
+ if (result.length != size)
+ throw "Error: bad result: " + result;
+ var sawThings = false;
+ for (var s in result)
+ sawThings = true;
+ if (sawThings)
+ throw "Error: array is in bad state: " + result;
+}
+
+for (var i = 0; i < 100000; ++i) {
+ test(0);
+ test(1);
+ test(42);
+}
</ins></span></pre>
</div>
</div>
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