[stubs] Don't unconditionally canonicalize in ChangeFloat64ToTagged.

src/code-stub-assembler.h

Index: src/code-stub-assembler.h
diff --git a/src/code-stub-assembler.h b/src/code-stub-assembler.h
index 76d4cece1bea1ba2f589a30c396d6b1626b707ee..5a01b1bbe7649751b3eda6defead359c193796b4 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -17,6 +17,7 @@ class CallInterfaceDescriptor;
 class StatsCounter;
 class StubCache;
 
+enum class CanonicalizationMode { kDontCanonicalize, kCanonicalize };
 enum class PrimitiveType { kBoolean, kNumber, kString, kSymbol };
 
 enum class UnicodeEncoding {
@@ -427,7 +428,11 @@ class CodeStubAssembler : public compiler::CodeAssembler {
   compiler::Node* TruncateHeapNumberValueToWord32(compiler::Node* object);
 
   // Conversions.
-  compiler::Node* ChangeFloat64ToTagged(compiler::Node* value);
+  // Returns a tagged representation of the float64 {value}. Might optionally
+  // try to canonicalize to Smi representation if the {value} is in Smi range.
+  compiler::Node* ChangeFloat64ToTagged(
+      compiler::Node* value,
+      CanonicalizationMode mode = CanonicalizationMode::kDontCanonicalize);
   compiler::Node* ChangeInt32ToTagged(compiler::Node* value);
   compiler::Node* ChangeUint32ToTagged(compiler::Node* value);