Type feedback for Unary Plus

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 60a6912654fe50b3533a470a1df8a540d145b37d..849c85d533d6c4e686e307af732e11cbe2b49393 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -1436,6 +1436,16 @@ HValue* HSub::Canonicalize() {
 }
 
 
+HValue* HMul::Canonicalize() {
+  if (left()->IsInteger32Constant() &&
+      HConstant::cast(left())->Integer32Value() == 1 &&
+      right()->representation().IsSpecialization()) {
+    return right();
+  }
+  return this;
+}
+
+
 HValue* HChange::Canonicalize() {
   return (from().Equals(to())) ? value() : this;
 }