Prevent deopt when assigning double values to typed arrays

src/ia32/lithium-ia32.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * 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
@@ skipping 88 matching lines @@
   V(GlobalObject)                               \
   V(GlobalReceiver)                             \
   V(Goto)                                       \
   V(HasCachedArrayIndex)                        \
   V(HasCachedArrayIndexAndBranch)               \
   V(HasInstanceType)                            \
   V(HasInstanceTypeAndBranch)                   \
   V(InstanceOf)                                 \
   V(InstanceOfAndBranch)                        \
   V(InstanceOfKnownGlobal)                      \
+  V(Integer32ToClamped)                         \
   V(Integer32ToDouble)                          \
   V(InvokeFunction)                             \
   V(IsNull)                                     \
   V(IsNullAndBranch)                            \
   V(IsObject)                                   \
   V(IsObjectAndBranch)                          \
   V(IsSmi)                                      \
   V(IsSmiAndBranch)                             \
   V(IsConstructCall)                            \
   V(IsConstructCallAndBranch)                   \
@@ skipping 1463 matching lines @@
 class LInteger32ToDouble: public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LInteger32ToDouble(LOperand* value) {
     inputs_[0] = value;
   }
 
   DECLARE_CONCRETE_INSTRUCTION(Integer32ToDouble, "int32-to-double")
 };
 
 
+class LInteger32ToClamped: public LTemplateInstruction<1, 1, 0> {
+ public:
+  explicit LInteger32ToClamped(LOperand* value) {
+    inputs_[0] = value;
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(Integer32ToClamped, "int32-to-clamped-int-8")
+};
+
+
 class LNumberTagI: public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LNumberTagI(LOperand* value) {
     inputs_[0] = value;
   }
 
   DECLARE_CONCRETE_INSTRUCTION(NumberTagI, "number-tag-i")
 };
 
 
 class LNumberTagD: public LTemplateInstruction<1, 1, 1> {
  public:
   LNumberTagD(LOperand* value, LOperand* temp) {
     inputs_[0] = value;
     temps_[0] = temp;
   }
 
   DECLARE_CONCRETE_INSTRUCTION(NumberTagD, "number-tag-d")
 };
 
 
 // Sometimes truncating conversion from a tagged value to an int32.
 class LDoubleToI: public LTemplateInstruction<1, 1, 1> {
  public:
-  LDoubleToI(LOperand* value, LOperand* temp) {
+  LDoubleToI(LOperand* value, LOperand* temp, ToIRoundingMode mode)
+      : rounding_mode_(mode) {
     inputs_[0] = value;
     temps_[0] = temp;
   }
 
   DECLARE_CONCRETE_INSTRUCTION(DoubleToI, "double-to-i")
   DECLARE_HYDROGEN_ACCESSOR(Change)
 
-  bool truncating() { return hydrogen()->CanTruncateToInt32(); }
+  ToIRoundingMode rounding_mode() const { return rounding_mode_; }
+
+ private:
+  ToIRoundingMode rounding_mode_;
 };
 
 
 // Truncating conversion from a tagged value to an int32.
 class LTaggedToI: public LTemplateInstruction<1, 1, 1> {
  public:
-  LTaggedToI(LOperand* value, LOperand* temp) {
+  LTaggedToI(LOperand* value, LOperand* temp, ToIRoundingMode mode)
+      : rounding_mode_(mode) {
     inputs_[0] = value;
     temps_[0] = temp;
   }
 
   DECLARE_CONCRETE_INSTRUCTION(TaggedToI, "tagged-to-i")
   DECLARE_HYDROGEN_ACCESSOR(Change)
 
-  bool truncating() { return hydrogen()->CanTruncateToInt32(); }
+  bool rounding_mode() const { return rounding_mode_; }
+
+ private:
+  ToIRoundingMode rounding_mode_;
 };
 
 
 class LSmiTag: public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LSmiTag(LOperand* value) {
     inputs_[0] = value;
   }
 
   DECLARE_CONCRETE_INSTRUCTION(SmiTag, "smi-tag")
 };
 
 
 class LNumberUntagD: public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LNumberUntagD(LOperand* value) {
     inputs_[0] = value;
   }
 
   DECLARE_CONCRETE_INSTRUCTION(NumberUntagD, "double-untag")
 };
 
 
 class LSmiUntag: public LTemplateInstruction<1, 1, 0> {
  public:
-  LSmiUntag(LOperand* value, bool needs_check)
-      : needs_check_(needs_check) {
+  LSmiUntag(LOperand* value, bool needs_check, bool should_clamp)
+      : needs_check_(needs_check),
+        should_clamp_(should_clamp) {
     inputs_[0] = value;
   }
 
   DECLARE_CONCRETE_INSTRUCTION(SmiUntag, "smi-untag")
 
   bool needs_check() const { return needs_check_; }
+  bool should_clamp() const { return should_clamp_; }
 
  private:
   bool needs_check_;
+  bool should_clamp_;
 };
 
 
 class LStoreNamedField: public LTemplateInstruction<0, 2, 1> {
  public:
   LStoreNamedField(LOperand* obj, LOperand* val, LOperand* temp) {
     inputs_[0] = obj;
     inputs_[1] = val;
     temps_[0] = temp;
   }
@@ skipping 48 matching lines @@
   DECLARE_HYDROGEN_ACCESSOR(StoreKeyedFastElement)
 
   virtual void PrintDataTo(StringStream* stream);
 
   LOperand* object() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
 };
 
 
-class LStoreKeyedSpecializedArrayElement: public LTemplateInstruction<0, 3, 1> {
+class LStoreKeyedSpecializedArrayElement: public LTemplateInstruction<0, 3, 0> {
  public:
   LStoreKeyedSpecializedArrayElement(LOperand* external_pointer,
                                      LOperand* key,
-                                     LOperand* val,
-                                     LOperand* temp) {
+                                     LOperand* val) {
     inputs_[0] = external_pointer;
     inputs_[1] = key;
     inputs_[2] = val;
-    temps_[0] = temp;
   }
 
   DECLARE_CONCRETE_INSTRUCTION(StoreKeyedSpecializedArrayElement,
                                "store-keyed-specialized-array-element")
   DECLARE_HYDROGEN_ACCESSOR(StoreKeyedSpecializedArrayElement)
 
   LOperand* external_pointer() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
   ExternalArrayType array_type() const {
@@ skipping 503 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_LITHIUM_IA32_H_