Update representation-from-uses to support smi.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index 116c4e7aa721c20cde8bf71aac9bdb7a9cbdf35f..43a5ad869eb30a780157e5689354b0a1734b5e93 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -3000,6 +3000,9 @@ class HPhi: public HValue {
   int tagged_non_phi_uses() const {
     return non_phi_uses_[Representation::kTagged];
   }
+  int smi_non_phi_uses() const {
+    return non_phi_uses_[Representation::kSmi];
+  }
   int int32_non_phi_uses() const {
     return non_phi_uses_[Representation::kInteger32];
   }
@@ -3009,6 +3012,9 @@ class HPhi: public HValue {
   int tagged_indirect_uses() const {
     return indirect_uses_[Representation::kTagged];
   }
+  int smi_indirect_uses() const {
+    return indirect_uses_[Representation::kSmi];
+  }
   int int32_indirect_uses() const {
     return indirect_uses_[Representation::kInteger32];
   }