Fold Box(Unbox(v)) and Unbox(Box(v)) for Float32x4 and Uint32x4

runtime/vm/intermediate_language.h

Index: runtime/vm/intermediate_language.h
diff --git a/runtime/vm/intermediate_language.h b/runtime/vm/intermediate_language.h
index f624d0e1384e916f4792ab7d87fb53b7ee286573..36131579194b46335111241af62813754a7ac622 100644
--- a/runtime/vm/intermediate_language.h
+++ b/runtime/vm/intermediate_language.h
@@ -4402,6 +4402,8 @@ class BoxFloat32x4Instr : public TemplateDefinition<1> {
 
   virtual bool MayThrow() const { return false; }
 
+  Definition* Canonicalize(FlowGraph* flow_graph);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(BoxFloat32x4Instr);
 };
@@ -4432,6 +4434,8 @@ class BoxUint32x4Instr : public TemplateDefinition<1> {
 
   virtual bool MayThrow() const { return false; }
 
+  Definition* Canonicalize(FlowGraph* flow_graph);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(BoxUint32x4Instr);
 };
@@ -4529,6 +4533,8 @@ class UnboxFloat32x4Instr : public TemplateDefinition<1> {
 
   virtual bool MayThrow() const { return false; }
 
+  Definition* Canonicalize(FlowGraph* flow_graph);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(UnboxFloat32x4Instr);
 };
@@ -4561,6 +4567,8 @@ class UnboxUint32x4Instr : public TemplateDefinition<1> {
 
   virtual bool MayThrow() const { return false; }
 
+  Definition* Canonicalize(FlowGraph* flow_graph);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(UnboxUint32x4Instr);
 };