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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/186805">186805</a></dd>
<dt>Author</dt> <dd>mmirman@apple.com</dd>
<dt>Date</dt> <dd>2015-07-14 10:24:29 -0700 (Tue, 14 Jul 2015)</dd>
</dl>
<h3>Log Message</h3>
<pre>Makes compileArithSub in the DFG ensure that the constant is an int32.
https://bugs.webkit.org/show_bug.cgi?id=146910
rdar://problem/21729083
Reviewed by Filip Pizlo.
Also fixes the debug build problem where all edges are assumed to
have UntypedUse before the fixup phase.
* dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::SpeculativeJIT::compileArithSub):
* dfg/DFGValidate.cpp:
(JSC::DFG::Validate::validateEdgeWithDoubleResultIfNecessary):
* tests/stress/arith-add-with-constants.js: Added some tests for this case.
(arithAdd42WrittenAsInteger):
(testArithAdd42WrittenAsInteger):
(arithSub42WrittenAsDouble):
(testArithSub42WrittenAsDouble):
(doubleConstant):
(testDoubleConstant): Added test for the case of +0.0 and Math.min(0.0)
(arithAdd42WrittenAsDouble): Deleted.
(testArithAdd42WrittenAsDouble): Deleted.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGSpeculativeJITcpp">trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGValidatecpp">trunk/Source/JavaScriptCore/dfg/DFGValidate.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoretestsstressarithaddwithconstantsjs">trunk/Source/JavaScriptCore/tests/stress/arith-add-with-constants.js</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (186804 => 186805)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog 2015-07-14 16:16:03 UTC (rev 186804)
+++ trunk/Source/JavaScriptCore/ChangeLog 2015-07-14 17:24:29 UTC (rev 186805)
</span><span class="lines">@@ -1,3 +1,28 @@
</span><ins>+2015-07-13 Matthew Mirman <mmirman@apple.com>
+
+ Makes compileArithSub in the DFG ensure that the constant is an int32.
+ https://bugs.webkit.org/show_bug.cgi?id=146910
+ rdar://problem/21729083
+
+ Reviewed by Filip Pizlo.
+
+ Also fixes the debug build problem where all edges are assumed to
+ have UntypedUse before the fixup phase.
+
+ * dfg/DFGSpeculativeJIT.cpp:
+ (JSC::DFG::SpeculativeJIT::compileArithSub):
+ * dfg/DFGValidate.cpp:
+ (JSC::DFG::Validate::validateEdgeWithDoubleResultIfNecessary):
+ * tests/stress/arith-add-with-constants.js: Added some tests for this case.
+ (arithAdd42WrittenAsInteger):
+ (testArithAdd42WrittenAsInteger):
+ (arithSub42WrittenAsDouble):
+ (testArithSub42WrittenAsDouble):
+ (doubleConstant):
+ (testDoubleConstant): Added test for the case of +0.0 and Math.min(0.0)
+ (arithAdd42WrittenAsDouble): Deleted.
+ (testArithAdd42WrittenAsDouble): Deleted.
+
</ins><span class="cx"> 2015-07-13 Basile Clement <basile_clement@apple.com>
</span><span class="cx">
</span><span class="cx"> Object cycles should not prevent allocation elimination/sinking
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGSpeculativeJITcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp (186804 => 186805)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp 2015-07-14 16:16:03 UTC (rev 186804)
+++ trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp 2015-07-14 17:24:29 UTC (rev 186805)
</span><span class="lines">@@ -2989,7 +2989,7 @@
</span><span class="cx"> case Int32Use: {
</span><span class="cx"> ASSERT(!shouldCheckNegativeZero(node->arithMode()));
</span><span class="cx">
</span><del>- if (node->child2()->isNumberConstant()) {
</del><ins>+ if (node->child2()->isInt32Constant()) {
</ins><span class="cx"> SpeculateInt32Operand op1(this, node->child1());
</span><span class="cx"> int32_t imm2 = node->child2()->asInt32();
</span><span class="cx"> GPRTemporary result(this);
</span><span class="lines">@@ -3006,7 +3006,7 @@
</span><span class="cx"> return;
</span><span class="cx"> }
</span><span class="cx">
</span><del>- if (node->child1()->isNumberConstant()) {
</del><ins>+ if (node->child1()->isInt32Constant()) {
</ins><span class="cx"> int32_t imm1 = node->child1()->asInt32();
</span><span class="cx"> SpeculateInt32Operand op2(this, node->child2());
</span><span class="cx"> GPRTemporary result(this);
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGValidatecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGValidate.cpp (186804 => 186805)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGValidate.cpp 2015-07-14 16:16:03 UTC (rev 186804)
+++ trunk/Source/JavaScriptCore/dfg/DFGValidate.cpp 2015-07-14 17:24:29 UTC (rev 186805)
</span><span class="lines">@@ -574,9 +574,9 @@
</span><span class="cx"> return;
</span><span class="cx">
</span><span class="cx"> if (m_graph.m_planStage < PlanStage::AfterFixup)
</span><del>- VALIDATE((node, edge), edge.useKind() == UntypedUse);
- else
- VALIDATE((node, edge), edge.useKind() == DoubleRepUse || edge.useKind() == DoubleRepRealUse || edge.useKind() == DoubleRepMachineIntUse);
</del><ins>+ return;
+
+ VALIDATE((node, edge), edge.useKind() == DoubleRepUse || edge.useKind() == DoubleRepRealUse || edge.useKind() == DoubleRepMachineIntUse);
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> void checkOperand(
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoretestsstressarithaddwithconstantsjs"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/tests/stress/arith-add-with-constants.js (186804 => 186805)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/tests/stress/arith-add-with-constants.js 2015-07-14 16:16:03 UTC (rev 186804)
+++ trunk/Source/JavaScriptCore/tests/stress/arith-add-with-constants.js 2015-07-14 17:24:29 UTC (rev 186805)
</span><span class="lines">@@ -167,56 +167,105 @@
</span><span class="cx"> testArithAdd42WrittenAsInteger();
</span><span class="cx">
</span><span class="cx">
</span><del>-function arithAdd42WrittenAsDouble(x) {
- var a = x + 42.0;
- var b = 42. + x;
</del><ins>+
+
+// Test "value + 42".
+function arithAdd42WrittenAsInteger(x) {
+ var a = x + 42;
+ var b = 42 + x;
</ins><span class="cx"> if (!(isNaN(x) && isNaN(a) && isNaN(b)) && a !== b)
</span><del>- throw "Internal error on arithAdd42WrittenAsDouble, a = " + a + " b = " + b;
</del><ins>+ throw "Internal error on arithAdd42WrittenAsInteger, a = " + a + " b = " + b;
</ins><span class="cx"> return a;
</span><span class="cx"> }
</span><del>-noInline(arithAdd42WrittenAsDouble);
</del><ins>+noInline(arithAdd42WrittenAsInteger);
</ins><span class="cx">
</span><del>-function testArithAdd42WrittenAsDouble() {
</del><ins>+function testArithAdd42WrittenAsInteger() {
</ins><span class="cx"> for (var i = 0; i < 1e4; ++i) {
</span><del>- var result = arithAdd42WrittenAsDouble(13);
</del><ins>+ var result = arithAdd42WrittenAsInteger(13);
</ins><span class="cx"> if (result !== 55) {
</span><del>- throw "arithAdd42WrittenAsDouble(i) = " + result + ", expected 55";
</del><ins>+ throw "arithAdd42WrittenAsInteger(13) = " + result + ", expected 55";
</ins><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> for (var i = 0; i < 1e4; ++i) {
</span><del>- var result = arithAdd42WrittenAsDouble(-0);
</del><ins>+ var result = arithAdd42WrittenAsInteger(-0);
</ins><span class="cx"> if (result !== 42) {
</span><del>- throw "arithAdd42WrittenAsDouble(-0) = " + result + ", expected 42";
</del><ins>+ throw "arithAdd42WrittenAsInteger(-0) = " + result + ", expected 42";
</ins><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> for (var i = 0; i < 1e4; ++i) {
</span><del>- var result = arithAdd42WrittenAsDouble(13.3);
</del><ins>+ var result = arithAdd42WrittenAsInteger(13.3);
</ins><span class="cx"> if (result !== 55.3) {
</span><del>- throw "arithAdd42WrittenAsDouble(13.3) = " + result + ", expected 55.3";
</del><ins>+ throw "arithAdd42WrittenAsInteger(13.3) = " + result + ", expected 55.3";
</ins><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> for (var i = 0; i < 1e4; ++i) {;
</span><del>- var result = arithAdd42WrittenAsDouble(NaN);
</del><ins>+ var result = arithAdd42WrittenAsInteger(NaN);
</ins><span class="cx"> if (!isNaN(result)) {
</span><del>- throw "arithAdd42WrittenAsDouble(NaN) = " + result + ", expected NaN";
</del><ins>+ throw "arithAdd42WrittenAsInteger(NaN) = " + result + ", expected NaN";
</ins><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> for (var i = 0; i < 1e4; ++i) {;
</span><del>- var result = arithAdd42WrittenAsDouble(Infinity);
</del><ins>+ var result = arithAdd42WrittenAsInteger(Infinity);
</ins><span class="cx"> if (isFinite(result)) {
</span><del>- throw "arithAdd42WrittenAsDouble(Infinity) = " + result + ", expected Infinity";
</del><ins>+ throw "arithAdd42WrittenAsInteger(Infinity) = " + result + ", expected Infinity";
</ins><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> for (var i = 0; i < 1e4; ++i) {;
</span><del>- var result = arithAdd42WrittenAsDouble(-Infinity);
</del><ins>+ var result = arithAdd42WrittenAsInteger(-Infinity);
</ins><span class="cx"> if (isFinite(result) || result >= 0) {
</span><del>- throw "arithAdd42WrittenAsDouble(-Infinity) = " + result + ", expected -Infinity";
</del><ins>+ throw "arithAdd42WrittenAsInteger(-Infinity) = " + result + ", expected -Infinity";
</ins><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx"> }
</span><del>-testArithAdd42WrittenAsDouble();
</del><span class="cx">\ No newline at end of file
</span><ins>+testArithAdd42WrittenAsInteger();
+
+function arithSub42WrittenAsDouble(x) {
+ var a = (x|0) - 42.0;
+ var b = -42. + (x|0);
+ if (!(isNaN(x) && isNaN(a) && isNaN(b)) && a !== b)
+ throw "Internal error on arithSub42WrittenAsDouble, a = " + a + " b = " + b;
+ return a;
+}
+noInline(arithSub42WrittenAsDouble);
+
+function testArithSub42WrittenAsDouble() {
+ for (var i = 0; i < 1e4; ++i) {
+ var result = arithSub42WrittenAsDouble(13);
+ if (result !== -29) {
+ throw "arithSub42WrittenAsDouble(13) = " + result + ", expected -29";
+ }
+ }
+
+ for (var i = 0; i < 1e4; ++i) {
+ var result = arithSub42WrittenAsDouble(-0);
+ if (result !== -42) {
+ throw "arithSub42WrittenAsDouble(-0) = " + result + ", expected -42";
+ }
+ }
+
+ for (var i = 0; i < 1e4; ++i) {
+ var result = arithSub42WrittenAsDouble(13.3);
+ if (result !== -29) {
+ throw "arithSub42WrittenAsDouble(13.3) = " + result + ", expected -29";
+ }
+ }
+}
+testArithSub42WrittenAsDouble();
+
+
+function doubleConstant(){
+ Math.min(0.0);
+ +0.0;
+} noInline(doubleConstant);
+
+function testDoubleConstant(){
+ for (var i = 0; i < 1e4; ++i) {
+ doubleConstant();
+ }
+}
+testDoubleConstant();
</ins></span></pre>
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