JavaScriptCore-7601.1.46.3.tar.gz

[apple/javascriptcore.git] / bytecode / ArrayProfile.h

diff --git a/bytecode/ArrayProfile.h b/bytecode/ArrayProfile.h
index 302365ff006e2c3dcdc53ae9bd2ebf663b9d97f6..66b295da7920a10c9a7cf627d5428f8b5dc15478 100644 (file)
--- a/bytecode/ArrayProfile.h
+++ b/bytecode/ArrayProfile.h
@@ -37,20 +37,44 @@ namespace JSC {
 class CodeBlock;
 class LLIntOffsetsExtractor;
 
-// This is a bitfield where each bit represents an IndexingType that we have seen.
-// There are 32 indexing types, so an unsigned is enough.
+// This is a bitfield where each bit represents an type of array access that we have seen.
+// There are 16 indexing types that use the lower bits.
+// There are 9 typed array types taking the bits 16 to 25.
 typedef unsigned ArrayModes;
 
+const ArrayModes Int8ArrayMode = 1 << 16;
+const ArrayModes Int16ArrayMode = 1 << 17;
+const ArrayModes Int32ArrayMode = 1 << 18;
+const ArrayModes Uint8ArrayMode = 1 << 19;
+const ArrayModes Uint8ClampedArrayMode = 1 << 20;
+const ArrayModes Uint16ArrayMode = 1 << 21;
+const ArrayModes Uint32ArrayMode = 1 << 22;
+const ArrayModes Float32ArrayMode = 1 << 23;
+const ArrayModes Float64ArrayMode = 1 << 24;
+
 #define asArrayModes(type) \
     (static_cast<unsigned>(1) << static_cast<unsigned>(type))
 
+#define ALL_TYPED_ARRAY_MODES \
+    (Int8ArrayMode            \
+    | Int16ArrayMode          \
+    | Int32ArrayMode          \
+    | Uint8ArrayMode          \
+    | Uint8ClampedArrayMode   \
+    | Uint16ArrayMode         \
+    | Uint32ArrayMode         \
+    | Float32ArrayMode        \
+    | Float64ArrayMode        \
+    )
+
 #define ALL_NON_ARRAY_ARRAY_MODES                       \
     (asArrayModes(NonArray)                             \
     | asArrayModes(NonArrayWithInt32)                   \
     | asArrayModes(NonArrayWithDouble)                  \
     | asArrayModes(NonArrayWithContiguous)              \
     | asArrayModes(NonArrayWithArrayStorage)            \
-    | asArrayModes(NonArrayWithSlowPutArrayStorage))
+    | asArrayModes(NonArrayWithSlowPutArrayStorage)     \
+    | ALL_TYPED_ARRAY_MODES)
 
 #define ALL_ARRAY_ARRAY_MODES                           \
     (asArrayModes(ArrayClass)                           \
@@ -65,6 +89,29 @@ typedef unsigned ArrayModes;
 
 inline ArrayModes arrayModeFromStructure(Structure* structure)
 {
+    switch (structure->classInfo()->typedArrayStorageType) {
+    case TypeInt8:
+        return Int8ArrayMode;
+    case TypeUint8:
+        return Uint8ArrayMode;
+    case TypeUint8Clamped:
+        return Uint8ClampedArrayMode;
+    case TypeInt16:
+        return Int16ArrayMode;
+    case TypeUint16:
+        return Uint16ArrayMode;
+    case TypeInt32:
+        return Int32ArrayMode;
+    case TypeUint32:
+        return Uint32ArrayMode;
+    case TypeFloat32:
+        return Float32ArrayMode;
+    case TypeFloat64:
+        return Float64ArrayMode;
+    case TypeDataView:
+    case NotTypedArray:
+        break;
+    }
     return asArrayModes(structure->indexingType());
 }
 
@@ -162,6 +209,8 @@ public:
     StructureID* addressOfLastSeenStructureID() { return &m_lastSeenStructureID; }
     ArrayModes* addressOfArrayModes() { return &m_observedArrayModes; }
     bool* addressOfMayStoreToHole() { return &m_mayStoreToHole; }
+
+    void setOutOfBounds() { m_outOfBounds = true; }
     bool* addressOfOutOfBounds() { return &m_outOfBounds; }
     
     void observeStructure(Structure* structure)
@@ -170,6 +219,7 @@ public:
     }
     
     void computeUpdatedPrediction(const ConcurrentJITLocker&, CodeBlock*);
+    void computeUpdatedPrediction(const ConcurrentJITLocker&, CodeBlock*, Structure* lastSeenStructure);
     
     ArrayModes observedArrayModes(const ConcurrentJITLocker&) const { return m_observedArrayModes; }
     bool mayInterceptIndexedAccesses(const ConcurrentJITLocker&) const { return m_mayInterceptIndexedAccesses; }
@@ -197,7 +247,7 @@ private:
     ArrayModes m_observedArrayModes;
 };
 
-typedef SegmentedVector<ArrayProfile, 4, 0> ArrayProfileVector;
+typedef SegmentedVector<ArrayProfile, 4> ArrayProfileVector;
 
 } // namespace JSC