webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 143 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/bytecode/ArithProfile.cpp b/Source/JavaScriptCore/bytecode/ArithProfile.cpp
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index 000000000..1fa7c7989
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+++ b/Source/JavaScriptCore/bytecode/ArithProfile.cpp
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+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "ArithProfile.h"
+
+#include "CCallHelpers.h"
+#include "JSCInlines.h"
+
+namespace JSC {
+
+#if ENABLE(JIT)
+void ArithProfile::emitObserveResult(CCallHelpers& jit, JSValueRegs regs, TagRegistersMode mode)
+{
+    if (!shouldEmitSetDouble() && !shouldEmitSetNonNumber())
+        return;
+
+    CCallHelpers::Jump isInt32 = jit.branchIfInt32(regs, mode);
+    CCallHelpers::Jump notDouble = jit.branchIfNotDoubleKnownNotInt32(regs, mode);
+    emitSetDouble(jit);
+    CCallHelpers::Jump done = jit.jump();
+    notDouble.link(&jit);
+    emitSetNonNumber(jit);
+    done.link(&jit);
+    isInt32.link(&jit);
+}
+
+bool ArithProfile::shouldEmitSetDouble() const
+{
+    uint32_t mask = ArithProfile::Int32Overflow | ArithProfile::Int52Overflow | ArithProfile::NegZeroDouble | ArithProfile::NonNegZeroDouble;
+    return (m_bits & mask) != mask;
+}
+
+void ArithProfile::emitSetDouble(CCallHelpers& jit) const
+{
+    if (shouldEmitSetDouble())
+        jit.or32(CCallHelpers::TrustedImm32(ArithProfile::Int32Overflow | ArithProfile::Int52Overflow | ArithProfile::NegZeroDouble | ArithProfile::NonNegZeroDouble), CCallHelpers::AbsoluteAddress(addressOfBits()));
+}
+
+bool ArithProfile::shouldEmitSetNonNumber() const
+{
+    uint32_t mask = ArithProfile::NonNumber;
+    return (m_bits & mask) != mask;
+}
+
+void ArithProfile::emitSetNonNumber(CCallHelpers& jit) const
+{
+    if (shouldEmitSetNonNumber())
+        jit.or32(CCallHelpers::TrustedImm32(ArithProfile::NonNumber), CCallHelpers::AbsoluteAddress(addressOfBits()));
+}
+#endif // ENABLE(JIT)
+
+} // namespace JSC
+
+namespace WTF {
+    
+using namespace JSC;
+
+void printInternal(PrintStream& out, const ArithProfile& profile)
+{
+    const char* separator = "";
+
+    out.print("Result:<");
+    if (!profile.didObserveNonInt32()) {
+        out.print("Int32");
+        separator = "|";
+    } else {
+        if (profile.didObserveNegZeroDouble()) {
+            out.print(separator, "NegZeroDouble");
+            separator = "|";
+        }
+        if (profile.didObserveNonNegZeroDouble()) {
+            out.print(separator, "NonNegZeroDouble");
+            separator = "|";
+        }
+        if (profile.didObserveNonNumber()) {
+            out.print(separator, "NonNumber");
+            separator = "|";
+        }
+        if (profile.didObserveInt32Overflow()) {
+            out.print(separator, "Int32Overflow");
+            separator = "|";
+        }
+        if (profile.didObserveInt52Overflow()) {
+            out.print(separator, "Int52Overflow");
+            separator = "|";
+        }
+    }
+    if (profile.tookSpecialFastPath())
+        out.print(separator, "Took special fast path.");
+    out.print(">");
+
+    out.print(" LHS ObservedType:<");
+    out.print(profile.lhsObservedType());
+    out.print("> RHS ObservedType:<");
+    out.print(profile.rhsObservedType());
+    out.print(">");
+
+    out.print(" LHS ResultType:<", RawPointer(bitwise_cast<void*>(static_cast<uintptr_t>(profile.lhsResultType().bits()))));
+    out.print("> RHS ResultType:<", RawPointer(bitwise_cast<void*>(static_cast<uintptr_t>(profile.rhsResultType().bits()))));
+    out.print(">");
+}
+
+void printInternal(PrintStream& out, const JSC::ObservedType& observedType)
+{
+    const char* separator = "";
+    if (observedType.sawInt32()) {
+        out.print(separator, "Int32");
+        separator = "|";
+    }
+    if (observedType.sawNumber()) {
+        out.print(separator, "Number");
+        separator = "|";
+    }
+    if (observedType.sawNonNumber()) {
+        out.print(separator, "NonNumber");
+        separator = "|";
+    }
+}
+
+} // namespace WTF