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<title>[192659] trunk/Source/JavaScriptCore</title>
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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/192659">192659</a></dd>
<dt>Author</dt> <dd>fpizlo@apple.com</dd>
<dt>Date</dt> <dd>2015-11-19 14:18:15 -0800 (Thu, 19 Nov 2015)</dd>
</dl>

<h3>Log Message</h3>
<pre>FTL-&gt;B3 lowering should support integer comparisons with the opcode abstracted and a few other things
https://bugs.webkit.org/show_bug.cgi?id=151463

Reviewed by Geoffrey Garen.

* ftl/FTLB3Output.h:
(JSC::FTL::Output::signExt):
(JSC::FTL::Output::zeroExt):
(JSC::FTL::Output::zeroExtPtr):
(JSC::FTL::Output::fpToInt):
(JSC::FTL::Output::fpToUInt):
(JSC::FTL::Output::fpToInt32):
(JSC::FTL::Output::baseIndex):
(JSC::FTL::Output::absolute):
(JSC::FTL::Output::load32NonNegative):
(JSC::FTL::Output::equal):
(JSC::FTL::Output::notEqual):
(JSC::FTL::Output::above):
(JSC::FTL::Output::lessThan):
(JSC::FTL::Output::lessThanOrEqual):
(JSC::FTL::Output::doubleEqual):
(JSC::FTL::Output::doubleNotEqualOrUnordered):
(JSC::FTL::Output::doubleLessThan):
(JSC::FTL::Output::icmp): Deleted.
(JSC::FTL::Output::fcmp): Deleted.
* ftl/FTLLowerDFGToLLVM.cpp:
(JSC::FTL::DFG::LowerDFGToLLVM::compileCompareEq):
(JSC::FTL::DFG::LowerDFGToLLVM::compileCompareLess):
(JSC::FTL::DFG::LowerDFGToLLVM::compileCompareLessEq):
(JSC::FTL::DFG::LowerDFGToLLVM::compileCompareGreater):
(JSC::FTL::DFG::LowerDFGToLLVM::compileCompareGreaterEq):
(JSC::FTL::DFG::LowerDFGToLLVM::compileLogicalNot):
(JSC::FTL::DFG::LowerDFGToLLVM::baseIndex):
(JSC::FTL::DFG::LowerDFGToLLVM::compare):
(JSC::FTL::DFG::LowerDFGToLLVM::speculateTruthyObject):
(JSC::FTL::DFG::LowerDFGToLLVM::nonSpeculativeCompare):</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoreftlFTLB3Outputh">trunk/Source/JavaScriptCore/ftl/FTLB3Output.h</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 (192658 => 192659)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog        2015-11-19 22:05:36 UTC (rev 192658)
+++ trunk/Source/JavaScriptCore/ChangeLog        2015-11-19 22:18:15 UTC (rev 192659)
</span><span class="lines">@@ -1,3 +1,42 @@
</span><ins>+2015-11-19  Filip Pizlo  &lt;fpizlo@apple.com&gt;
+
+        FTL-&gt;B3 lowering should support integer comparisons with the opcode abstracted and a few other things
+        https://bugs.webkit.org/show_bug.cgi?id=151463
+
+        Reviewed by Geoffrey Garen.
+
+        * ftl/FTLB3Output.h:
+        (JSC::FTL::Output::signExt):
+        (JSC::FTL::Output::zeroExt):
+        (JSC::FTL::Output::zeroExtPtr):
+        (JSC::FTL::Output::fpToInt):
+        (JSC::FTL::Output::fpToUInt):
+        (JSC::FTL::Output::fpToInt32):
+        (JSC::FTL::Output::baseIndex):
+        (JSC::FTL::Output::absolute):
+        (JSC::FTL::Output::load32NonNegative):
+        (JSC::FTL::Output::equal):
+        (JSC::FTL::Output::notEqual):
+        (JSC::FTL::Output::above):
+        (JSC::FTL::Output::lessThan):
+        (JSC::FTL::Output::lessThanOrEqual):
+        (JSC::FTL::Output::doubleEqual):
+        (JSC::FTL::Output::doubleNotEqualOrUnordered):
+        (JSC::FTL::Output::doubleLessThan):
+        (JSC::FTL::Output::icmp): Deleted.
+        (JSC::FTL::Output::fcmp): Deleted.
+        * ftl/FTLLowerDFGToLLVM.cpp:
+        (JSC::FTL::DFG::LowerDFGToLLVM::compileCompareEq):
+        (JSC::FTL::DFG::LowerDFGToLLVM::compileCompareLess):
+        (JSC::FTL::DFG::LowerDFGToLLVM::compileCompareLessEq):
+        (JSC::FTL::DFG::LowerDFGToLLVM::compileCompareGreater):
+        (JSC::FTL::DFG::LowerDFGToLLVM::compileCompareGreaterEq):
+        (JSC::FTL::DFG::LowerDFGToLLVM::compileLogicalNot):
+        (JSC::FTL::DFG::LowerDFGToLLVM::baseIndex):
+        (JSC::FTL::DFG::LowerDFGToLLVM::compare):
+        (JSC::FTL::DFG::LowerDFGToLLVM::speculateTruthyObject):
+        (JSC::FTL::DFG::LowerDFGToLLVM::nonSpeculativeCompare):
+
</ins><span class="cx"> 2015-11-19  Benjamin Poulain  &lt;bpoulain@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         [JSC] When the iterated allocator is forced to spill, nuke the Moves that were already proven to be useless
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreftlFTLB3Outputh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ftl/FTLB3Output.h (192658 => 192659)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ftl/FTLB3Output.h        2015-11-19 22:05:36 UTC (rev 192658)
+++ trunk/Source/JavaScriptCore/ftl/FTLB3Output.h        2015-11-19 22:18:15 UTC (rev 192659)
</span><span class="lines">@@ -175,7 +175,7 @@
</span><span class="cx"> 
</span><span class="cx">     LValue signExt(LValue value, LType type) { CRASH(); }
</span><span class="cx">     LValue zeroExt(LValue value, LType type) { return m_block-&gt;appendNew&lt;B3::Value&gt;(m_proc, B3::ZExt32, type, origin(), value); }
</span><del>-    LValue zeroExtPtr(LValue value) { CRASH(); }
</del><ins>+    LValue zeroExtPtr(LValue value) { return zeroExt(value, B3::Int64); }
</ins><span class="cx">     LValue fpToInt(LValue value, LType type) { CRASH(); }
</span><span class="cx">     LValue fpToUInt(LValue value, LType type) { CRASH(); }
</span><span class="cx">     LValue fpToInt32(LValue value) { CRASH(); }
</span><span class="lines">@@ -247,8 +247,14 @@
</span><span class="cx"> 
</span><span class="cx">     LValue baseIndex(LValue base, LValue index, Scale, ptrdiff_t offset = 0) { CRASH(); }
</span><span class="cx"> 
</span><del>-    TypedPointer baseIndex(const AbstractHeap&amp; heap, LValue base, LValue index, Scale scale, ptrdiff_t offset = 0) { CRASH(); }
-    TypedPointer baseIndex(IndexedAbstractHeap&amp; heap, LValue base, LValue index, JSValue indexAsConstant = JSValue(), ptrdiff_t offset = 0) { CRASH(); }
</del><ins>+    TypedPointer baseIndex(const AbstractHeap&amp; heap, LValue base, LValue index, Scale scale, ptrdiff_t offset = 0)
+    {
+        return TypedPointer(heap, baseIndex(base, index, scale, offset));
+    }
+    TypedPointer baseIndex(IndexedAbstractHeap&amp; heap, LValue base, LValue index, JSValue indexAsConstant = JSValue(), ptrdiff_t offset = 0)
+    {
+        return heap.baseIndex(*this, base, index, indexAsConstant, offset);
+    }
</ins><span class="cx"> 
</span><span class="cx">     TypedPointer absolute(void* address)
</span><span class="cx">     {
</span><span class="lines">@@ -276,7 +282,6 @@
</span><span class="cx">     LValue load32NonNegative(TypedPointer pointer) { return load32(pointer); }
</span><span class="cx">     LValue load32NonNegative(LValue base, const AbstractField&amp; field) { return load32(base, field); }
</span><span class="cx"> 
</span><del>-    LValue icmp(LIntPredicate cond, LValue left, LValue right) { CRASH(); }
</del><span class="cx">     LValue equal(LValue left, LValue right) { return m_block-&gt;appendNew&lt;B3::Value&gt;(m_proc, B3::Equal, origin(), left, right); }
</span><span class="cx">     LValue notEqual(LValue left, LValue right) { return m_block-&gt;appendNew&lt;B3::Value&gt;(m_proc, B3::NotEqual, origin(), left, right); }
</span><span class="cx">     LValue above(LValue left, LValue right) { return m_block-&gt;appendNew&lt;B3::Value&gt;(m_proc, B3::Above, origin(), left, right); }
</span><span class="lines">@@ -288,7 +293,6 @@
</span><span class="cx">     LValue lessThan(LValue left, LValue right) { return m_block-&gt;appendNew&lt;B3::Value&gt;(m_proc, B3::LessThan, origin(), left, right); }
</span><span class="cx">     LValue lessThanOrEqual(LValue left, LValue right) { return m_block-&gt;appendNew&lt;B3::Value&gt;(m_proc, B3::LessEqual, origin(), left, right); }
</span><span class="cx"> 
</span><del>-    LValue fcmp(LRealPredicate cond, LValue left, LValue right) { CRASH(); }
</del><span class="cx">     LValue doubleEqual(LValue left, LValue right) { return m_block-&gt;appendNew&lt;B3::Value&gt;(m_proc, B3::Equal, origin(), left, right); }
</span><span class="cx">     LValue doubleNotEqualOrUnordered(LValue left, LValue right) { return m_block-&gt;appendNew&lt;B3::Value&gt;(m_proc, B3::NotEqual, origin(), left, right); }
</span><span class="cx">     LValue doubleLessThan(LValue left, LValue right) { return m_block-&gt;appendNew&lt;B3::Value&gt;(m_proc, B3::LessThan, origin(), left, right); }
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreftlFTLLowerDFGToLLVMcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp (192658 => 192659)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp        2015-11-19 22:05:36 UTC (rev 192658)
+++ trunk/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp        2015-11-19 22:18:15 UTC (rev 192659)
</span><span class="lines">@@ -4522,7 +4522,11 @@
</span><span class="cx">         }
</span><span class="cx">         
</span><span class="cx">         if (m_node-&gt;isBinaryUseKind(UntypedUse)) {
</span><del>-            nonSpeculativeCompare(LLVMIntEQ, operationCompareEq);
</del><ins>+            nonSpeculativeCompare(
+                [&amp;] (LValue left, LValue right) {
+                    return m_out.equal(left, right);
+                },
+                operationCompareEq);
</ins><span class="cx">             return;
</span><span class="cx">         }
</span><span class="cx"> 
</span><span class="lines">@@ -4667,22 +4671,50 @@
</span><span class="cx">     
</span><span class="cx">     void compileCompareLess()
</span><span class="cx">     {
</span><del>-        compare(LLVMIntSLT, LLVMRealOLT, operationCompareLess);
</del><ins>+        compare(
+            [&amp;] (LValue left, LValue right) {
+                return m_out.lessThan(left, right);
+            },
+            [&amp;] (LValue left, LValue right) {
+                return m_out.doubleLessThan(left, right);
+            },
+            operationCompareLess);
</ins><span class="cx">     }
</span><span class="cx">     
</span><span class="cx">     void compileCompareLessEq()
</span><span class="cx">     {
</span><del>-        compare(LLVMIntSLE, LLVMRealOLE, operationCompareLessEq);
</del><ins>+        compare(
+            [&amp;] (LValue left, LValue right) {
+                return m_out.lessThanOrEqual(left, right);
+            },
+            [&amp;] (LValue left, LValue right) {
+                return m_out.doubleLessThanOrEqual(left, right);
+            },
+            operationCompareLessEq);
</ins><span class="cx">     }
</span><span class="cx">     
</span><span class="cx">     void compileCompareGreater()
</span><span class="cx">     {
</span><del>-        compare(LLVMIntSGT, LLVMRealOGT, operationCompareGreater);
</del><ins>+        compare(
+            [&amp;] (LValue left, LValue right) {
+                return m_out.greaterThan(left, right);
+            },
+            [&amp;] (LValue left, LValue right) {
+                return m_out.doubleGreaterThan(left, right);
+            },
+            operationCompareGreater);
</ins><span class="cx">     }
</span><span class="cx">     
</span><span class="cx">     void compileCompareGreaterEq()
</span><span class="cx">     {
</span><del>-        compare(LLVMIntSGE, LLVMRealOGE, operationCompareGreaterEq);
</del><ins>+        compare(
+            [&amp;] (LValue left, LValue right) {
+                return m_out.greaterThanOrEqual(left, right);
+            },
+            [&amp;] (LValue left, LValue right) {
+                return m_out.doubleGreaterThanOrEqual(left, right);
+            },
+            operationCompareGreaterEq);
</ins><span class="cx">     }
</span><span class="cx">     
</span><span class="cx">     void compileLogicalNot()
</span><span class="lines">@@ -6523,15 +6555,16 @@
</span><span class="cx">         return m_out.baseIndex(
</span><span class="cx">             heap, storage, m_out.zeroExtPtr(index), provenValue(edge), offset);
</span><span class="cx">     }
</span><del>-    
</del><ins>+
+    template&lt;typename IntFunctor, typename DoubleFunctor&gt;
</ins><span class="cx">     void compare(
</span><del>-        LIntPredicate intCondition, LRealPredicate realCondition,
</del><ins>+        const IntFunctor&amp; intFunctor, const DoubleFunctor&amp; doubleFunctor,
</ins><span class="cx">         S_JITOperation_EJJ helperFunction)
</span><span class="cx">     {
</span><span class="cx">         if (m_node-&gt;isBinaryUseKind(Int32Use)) {
</span><span class="cx">             LValue left = lowInt32(m_node-&gt;child1());
</span><span class="cx">             LValue right = lowInt32(m_node-&gt;child2());
</span><del>-            setBoolean(m_out.icmp(intCondition, left, right));
</del><ins>+            setBoolean(intFunctor(left, right));
</ins><span class="cx">             return;
</span><span class="cx">         }
</span><span class="cx">         
</span><span class="lines">@@ -6539,19 +6572,19 @@
</span><span class="cx">             Int52Kind kind;
</span><span class="cx">             LValue left = lowWhicheverInt52(m_node-&gt;child1(), kind);
</span><span class="cx">             LValue right = lowInt52(m_node-&gt;child2(), kind);
</span><del>-            setBoolean(m_out.icmp(intCondition, left, right));
</del><ins>+            setBoolean(intFunctor(left, right));
</ins><span class="cx">             return;
</span><span class="cx">         }
</span><span class="cx">         
</span><span class="cx">         if (m_node-&gt;isBinaryUseKind(DoubleRepUse)) {
</span><span class="cx">             LValue left = lowDouble(m_node-&gt;child1());
</span><span class="cx">             LValue right = lowDouble(m_node-&gt;child2());
</span><del>-            setBoolean(m_out.fcmp(realCondition, left, right));
</del><ins>+            setBoolean(doubleFunctor(left, right));
</ins><span class="cx">             return;
</span><span class="cx">         }
</span><span class="cx">         
</span><span class="cx">         if (m_node-&gt;isBinaryUseKind(UntypedUse)) {
</span><del>-            nonSpeculativeCompare(intCondition, helperFunction);
</del><ins>+            nonSpeculativeCompare(intFunctor, helperFunction);
</ins><span class="cx">             return;
</span><span class="cx">         }
</span><span class="cx">         
</span><span class="lines">@@ -6602,8 +6635,9 @@
</span><span class="cx">                 m_out.load8ZeroExt32(cell, m_heaps.JSCell_typeInfoFlags),
</span><span class="cx">                 m_out.constInt32(MasqueradesAsUndefined)));
</span><span class="cx">     }
</span><del>-    
-    void nonSpeculativeCompare(LIntPredicate intCondition, S_JITOperation_EJJ helperFunction)
</del><ins>+
+    template&lt;typename IntFunctor&gt;
+    void nonSpeculativeCompare(const IntFunctor&amp; intFunctor, S_JITOperation_EJJ helperFunction)
</ins><span class="cx">     {
</span><span class="cx">         LValue left = lowJSValue(m_node-&gt;child1());
</span><span class="cx">         LValue right = lowJSValue(m_node-&gt;child2());
</span><span class="lines">@@ -6619,8 +6653,7 @@
</span><span class="cx">         m_out.branch(isNotInt32(right), rarely(slowPath), usually(fastPath));
</span><span class="cx">         
</span><span class="cx">         m_out.appendTo(fastPath, slowPath);
</span><del>-        ValueFromBlock fastResult = m_out.anchor(
-            m_out.icmp(intCondition, unboxInt32(left), unboxInt32(right)));
</del><ins>+        ValueFromBlock fastResult = m_out.anchor(intFunctor(unboxInt32(left), unboxInt32(right)));
</ins><span class="cx">         m_out.jump(continuation);
</span><span class="cx">         
</span><span class="cx">         m_out.appendTo(slowPath, continuation);
</span></span></pre>
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