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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/198024">198024</a></dd>
<dt>Author</dt> <dd>commit-queue@webkit.org</dd>
<dt>Date</dt> <dd>2016-03-11 09:51:00 -0800 (Fri, 11 Mar 2016)</dd>
</dl>
<h3>Log Message</h3>
<pre>Unreviewed, rolling out <a href="http://trac.webkit.org/projects/webkit/changeset/197994">r197994</a>.
https://bugs.webkit.org/show_bug.cgi?id=155368
Broke several ARM tests (Requested by msaboff on #webkit).
Reverted changeset:
"[JSC] Add register reuse for ArithAdd of an Int32 and
constant in DFG"
https://bugs.webkit.org/show_bug.cgi?id=155164
http://trac.webkit.org/changeset/197994</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGOSRExith">trunk/Source/JavaScriptCore/dfg/DFGOSRExit.h</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGOSRExitCompiler32_64cpp">trunk/Source/JavaScriptCore/dfg/DFGOSRExitCompiler32_64.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGOSRExitCompiler64cpp">trunk/Source/JavaScriptCore/dfg/DFGOSRExitCompiler64.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGSpeculativeJITcpp">trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp</a></li>
</ul>
<h3>Removed Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoretestsstressarithaddwithconstantoverflowjs">trunk/Source/JavaScriptCore/tests/stress/arith-add-with-constant-overflow.js</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (198023 => 198024)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog 2016-03-11 17:28:46 UTC (rev 198023)
+++ trunk/Source/JavaScriptCore/ChangeLog 2016-03-11 17:51:00 UTC (rev 198024)
</span><span class="lines">@@ -1,3 +1,17 @@
</span><ins>+2016-03-11 Commit Queue <commit-queue@webkit.org>
+
+ Unreviewed, rolling out r197994.
+ https://bugs.webkit.org/show_bug.cgi?id=155368
+
+ Broke several ARM tests (Requested by msaboff on #webkit).
+
+ Reverted changeset:
+
+ "[JSC] Add register reuse for ArithAdd of an Int32 and
+ constant in DFG"
+ https://bugs.webkit.org/show_bug.cgi?id=155164
+ http://trac.webkit.org/changeset/197994
+
</ins><span class="cx"> 2016-03-11 Yusuke Suzuki <utatane.tea@gmail.com>
</span><span class="cx">
</span><span class="cx"> [ES6] Implement Reflect.set without receiver support
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGOSRExith"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGOSRExit.h (198023 => 198024)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGOSRExit.h 2016-03-11 17:28:46 UTC (rev 198023)
+++ trunk/Source/JavaScriptCore/dfg/DFGOSRExit.h 2016-03-11 17:51:00 UTC (rev 198024)
</span><span class="lines">@@ -48,9 +48,8 @@
</span><span class="cx">
</span><span class="cx"> // This enum describes the types of additional recovery that
</span><span class="cx"> // may need be performed should a speculation check fail.
</span><del>-enum SpeculationRecoveryType : uint8_t {
</del><ins>+enum SpeculationRecoveryType {
</ins><span class="cx"> SpeculativeAdd,
</span><del>- SpeculativeAddImmediate,
</del><span class="cx"> BooleanSpeculationCheck
</span><span class="cx"> };
</span><span class="cx">
</span><span class="lines">@@ -61,34 +60,22 @@
</span><span class="cx"> class SpeculationRecovery {
</span><span class="cx"> public:
</span><span class="cx"> SpeculationRecovery(SpeculationRecoveryType type, GPRReg dest, GPRReg src)
</span><del>- : m_src(src)
</del><ins>+ : m_type(type)
</ins><span class="cx"> , m_dest(dest)
</span><del>- , m_type(type)
</del><ins>+ , m_src(src)
</ins><span class="cx"> {
</span><span class="cx"> }
</span><span class="cx">
</span><del>- SpeculationRecovery(SpeculationRecoveryType type, GPRReg dest, int32_t immediate)
- : m_immediate(immediate)
- , m_dest(dest)
- , m_type(type)
- {
- }
-
</del><span class="cx"> SpeculationRecoveryType type() { return m_type; }
</span><span class="cx"> GPRReg dest() { return m_dest; }
</span><span class="cx"> GPRReg src() { return m_src; }
</span><del>- int32_t immediate() { return m_immediate; }
</del><span class="cx">
</span><span class="cx"> private:
</span><del>- // different recovery types may required different additional information here.
- union {
- GPRReg m_src;
- int32_t m_immediate;
- };
- GPRReg m_dest;
-
</del><span class="cx"> // Indicates the type of additional recovery to be performed.
</span><span class="cx"> SpeculationRecoveryType m_type;
</span><ins>+ // different recovery types may required different additional information here.
+ GPRReg m_dest;
+ GPRReg m_src;
</ins><span class="cx"> };
</span><span class="cx">
</span><span class="cx"> // === OSRExit ===
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGOSRExitCompiler32_64cpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGOSRExitCompiler32_64.cpp (198023 => 198024)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGOSRExitCompiler32_64.cpp 2016-03-11 17:28:46 UTC (rev 198023)
+++ trunk/Source/JavaScriptCore/dfg/DFGOSRExitCompiler32_64.cpp 2016-03-11 17:51:00 UTC (rev 198024)
</span><span class="lines">@@ -56,10 +56,6 @@
</span><span class="cx"> case SpeculativeAdd:
</span><span class="cx"> m_jit.sub32(recovery->src(), recovery->dest());
</span><span class="cx"> break;
</span><del>-
- case SpeculativeAddImmediate:
- m_jit.sub32(AssemblyHelpers::Imm32(recovery->immediate()), recovery->dest());
- break;
</del><span class="cx">
</span><span class="cx"> case BooleanSpeculationCheck:
</span><span class="cx"> break;
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGOSRExitCompiler64cpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGOSRExitCompiler64.cpp (198023 => 198024)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGOSRExitCompiler64.cpp 2016-03-11 17:28:46 UTC (rev 198023)
+++ trunk/Source/JavaScriptCore/dfg/DFGOSRExitCompiler64.cpp 2016-03-11 17:51:00 UTC (rev 198024)
</span><span class="lines">@@ -61,11 +61,6 @@
</span><span class="cx"> m_jit.sub32(recovery->src(), recovery->dest());
</span><span class="cx"> m_jit.or64(GPRInfo::tagTypeNumberRegister, recovery->dest());
</span><span class="cx"> break;
</span><del>-
- case SpeculativeAddImmediate:
- m_jit.sub32(AssemblyHelpers::Imm32(recovery->immediate()), recovery->dest());
- m_jit.or64(GPRInfo::tagTypeNumberRegister, recovery->dest());
- break;
</del><span class="cx">
</span><span class="cx"> case BooleanSpeculationCheck:
</span><span class="cx"> m_jit.xor64(AssemblyHelpers::TrustedImm32(static_cast<int32_t>(ValueFalse)), recovery->dest());
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGSpeculativeJITcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp (198023 => 198024)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp 2016-03-11 17:28:46 UTC (rev 198023)
+++ trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp 2016-03-11 17:51:00 UTC (rev 198024)
</span><span class="lines">@@ -3256,26 +3256,19 @@
</span><span class="cx">
</span><span class="cx"> if (node->child2()->isInt32Constant()) {
</span><span class="cx"> SpeculateInt32Operand op1(this, node->child1());
</span><del>- GPRTemporary result(this, Reuse, op1);
-
- GPRReg gpr1 = op1.gpr();
</del><span class="cx"> int32_t imm2 = node->child2()->asInt32();
</span><del>- GPRReg gprResult = result.gpr();
</del><span class="cx">
</span><span class="cx"> if (!shouldCheckOverflow(node->arithMode())) {
</span><del>- m_jit.add32(Imm32(imm2), gpr1, gprResult);
- int32Result(gprResult, node);
</del><ins>+ GPRTemporary result(this, Reuse, op1);
+ m_jit.add32(Imm32(imm2), op1.gpr(), result.gpr());
+ int32Result(result.gpr(), node);
</ins><span class="cx"> return;
</span><span class="cx"> }
</span><span class="cx">
</span><del>- MacroAssembler::Jump check = m_jit.branchAdd32(MacroAssembler::Overflow, gpr1, Imm32(imm2), gprResult);
- if (gpr1 == gprResult) {
- speculationCheck(Overflow, JSValueRegs(), 0, check,
- SpeculationRecovery(SpeculativeAddImmediate, gpr1, imm2));
- } else
- speculationCheck(Overflow, JSValueRegs(), 0, check);
</del><ins>+ GPRTemporary result(this);
+ speculationCheck(Overflow, JSValueRegs(), 0, m_jit.branchAdd32(MacroAssembler::Overflow, op1.gpr(), Imm32(imm2), result.gpr()));
</ins><span class="cx">
</span><del>- int32Result(gprResult, node);
</del><ins>+ int32Result(result.gpr(), node);
</ins><span class="cx"> return;
</span><span class="cx"> }
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoretestsstressarithaddwithconstantoverflowjs"></a>
<div class="delfile"><h4>Deleted: trunk/Source/JavaScriptCore/tests/stress/arith-add-with-constant-overflow.js (198023 => 198024)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/tests/stress/arith-add-with-constant-overflow.js 2016-03-11 17:28:46 UTC (rev 198023)
+++ trunk/Source/JavaScriptCore/tests/stress/arith-add-with-constant-overflow.js 2016-03-11 17:51:00 UTC (rev 198024)
</span><span class="lines">@@ -1,21 +0,0 @@
</span><del>-function opaqueAdd(a)
-{
- return a + 42;
-}
-noInline(opaqueAdd);
-
-// Warm up.
-for (let i = 0; i < 1e4; ++i) {
- let result = opaqueAdd(5);
- if (result !== 47)
- throw "Invalid opaqueAdd(5) at i = " + i;
-}
-
-// Overflow.
-for (let i = 0; i < 1e3; ++i) {
- for (let j = -50; j < 50; ++j) {
- let result = opaqueAdd(2147483647 + j);
- if (result !== 2147483689 + j)
- throw "Invalid opaqueAdd(" + 2147483647 + j + ") at i = " + i + " j = " + j;
- }
-}
</del></span></pre>
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