Fix StoreIndexedInstr input representation requirements for Int32/Uint32 arrays.

runtime/vm/assembler_arm.h

Index: runtime/vm/assembler_arm.h
diff --git a/runtime/vm/assembler_arm.h b/runtime/vm/assembler_arm.h
index 9a08c8e6fe50243a428a2aac9978a885a16782aa..49e621bf4ed4f2112c243babf29935b1e7873227 100644
--- a/runtime/vm/assembler_arm.h
+++ b/runtime/vm/assembler_arm.h
@@ -717,6 +717,7 @@ class Assembler : public ValueObject {
   void Lsr(Register rd, Register rm, Register rs, Condition cond = AL);
   void Asr(Register rd, Register rm, uint32_t shift_imm, Condition cond = AL);
   void Asr(Register rd, Register rm, Register rs, Condition cond = AL);
+  void AsrS(Register rd, Register rm, uint32_t shift_imm, Condition cond = AL);
   void Ror(Register rd, Register rm, uint32_t shift_imm, Condition cond = AL);
   void Ror(Register rd, Register rm, Register rs, Condition cond = AL);
   void Rrx(Register rd, Register rm, Condition cond = AL);
@@ -734,6 +735,10 @@ class Assembler : public ValueObject {
     Lsl(reg, reg, kSmiTagSize, cond);
   }
 
+  void SmiTag(Register dst, Register src, Condition cond = AL) {
+    Lsl(dst, src, kSmiTagSize, cond);
+  }
+
   void SmiUntag(Register reg, Condition cond = AL) {
     Asr(reg, reg, kSmiTagSize, cond);
   }
@@ -742,6 +747,12 @@ class Assembler : public ValueObject {
     Asr(dst, src, kSmiTagSize, cond);
   }
 
+  void SmiUntag(Register dst, Register src, Label* ok) {
+    ASSERT(kSmiTagSize == 1);
+    AsrS(dst, src, kSmiTagSize);
+    b(ok, CC);
+  }
+
   // Function frame setup and tear down.
   void EnterFrame(RegList regs, intptr_t frame_space);
   void LeaveFrame(RegList regs);