[turbofan] Introduce proper abstractions for ToNumber truncations.

src/compiler/code-stub-assembler.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_CODE_STUB_ASSEMBLER_H_
 #define V8_COMPILER_CODE_STUB_ASSEMBLER_H_
 
 #include <map>
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
@@ skipping 246 matching lines @@
   // Macros
   // ===========================================================================
 
   // Tag a Word as a Smi value.
   Node* SmiTag(Node* value);
   // Untag a Smi value as a Word.
   Node* SmiUntag(Node* value);
 
   // Smi conversions.
   Node* SmiToFloat64(Node* value);
-  Node* SmiToInt32(Node* value);
+  Node* SmiToWord32(Node* value);
 
   // Smi operations.
   Node* SmiAdd(Node* a, Node* b);
   Node* SmiAddWithOverflow(Node* a, Node* b);
   Node* SmiSub(Node* a, Node* b);
   Node* SmiSubWithOverflow(Node* a, Node* b);
   Node* SmiEqual(Node* a, Node* b);
   Node* SmiLessThan(Node* a, Node* b);
   Node* SmiLessThanOrEqual(Node* a, Node* b);
   Node* SmiMin(Node* a, Node* b);
@@ skipping 11 matching lines @@
   Node* LoadBufferObject(Node* buffer, int offset,
                          MachineType rep = MachineType::AnyTagged());
   // Load a field from an object on the heap.
   Node* LoadObjectField(Node* object, int offset,
                         MachineType rep = MachineType::AnyTagged());
   // Load the floating point value of a HeapNumber.
   Node* LoadHeapNumberValue(Node* object);
   // Store the floating point value of a HeapNumber.
   Node* StoreHeapNumberValue(Node* object, Node* value);
   // Truncate the floating point value of a HeapNumber to an Int32.
-  Node* TruncateHeapNumberValueToInt32(Node* object);
+  Node* TruncateHeapNumberValueToWord32(Node* object);
   // Load the bit field of a Map.
   Node* LoadMapBitField(Node* map);
   // Load the instance type of a Map.
   Node* LoadMapInstanceType(Node* map);
 
   // Load an array element from a FixedArray.
   Node* LoadFixedArrayElementSmiIndex(Node* object, Node* smi_index,
                                       int additional_offset = 0);
   Node* LoadFixedArrayElementConstantIndex(Node* object, int index);
 
@@ skipping 17 matching lines @@
   // Returns a node that is true if the given bit is set in |word32|.
   template <typename T>
   Node* BitFieldDecode(Node* word32) {
     return BitFieldDecode(word32, T::kShift, T::kMask);
   }
 
   Node* BitFieldDecode(Node* word32, uint32_t shift, uint32_t mask);
 
   // Conversions.
   Node* ChangeInt32ToTagged(Node* value);
+  Node* TruncateTaggedToFloat64(Node* context, Node* value);
+  Node* TruncateTaggedToWord32(Node* context, Node* value);
 
   // Branching helpers.
   // TODO(danno): Can we be more cleverish wrt. edge-split?
   void BranchIf(Node* condition, Label* if_true, Label* if_false);
 
 #define BRANCH_HELPER(name)                                                \
   void BranchIf##name(Node* a, Node* b, Label* if_true, Label* if_false) { \
     BranchIf(name(a, b), if_true, if_false);                               \
   }
   CODE_STUB_ASSEMBLER_COMPARE_BINARY_OP_LIST(BRANCH_HELPER)
@@ skipping 88 matching lines @@
   // Map of variables to the list of value nodes that have been added from each
   // merge path in their order of merging.
   std::map<Variable::Impl*, std::vector<Node*>> variable_merges_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_STUB_ASSEMBLER_H_