Fix StoreIndexedInstr input representation requirements for Int32/Uint32 arrays.

runtime/vm/assembler_arm.cc

Index: runtime/vm/assembler_arm.cc
diff --git a/runtime/vm/assembler_arm.cc b/runtime/vm/assembler_arm.cc
index 5d69702364d5f9c8b4b724af631581ba6ea383e2..052173d17fa31fc339955e258f0057eb7c0f633a 100644
--- a/runtime/vm/assembler_arm.cc
+++ b/runtime/vm/assembler_arm.cc
@@ -2261,6 +2261,14 @@ void Assembler::Asr(Register rd, Register rm, uint32_t shift_imm,
 }
 
 
+void Assembler::AsrS(Register rd, Register rm, uint32_t shift_imm,
+                     Condition cond) {
+  ASSERT(shift_imm != 0);  // Do not use Asr if no shift is wanted.
+  if (shift_imm == 32) shift_imm = 0;  // Comply to UAL syntax.
+  movs(rd, Operand(rm, ASR, shift_imm), cond);
+}
+
+
 void Assembler::Asr(Register rd, Register rm, Register rs, Condition cond) {
   mov(rd, Operand(rm, ASR, rs), cond);
 }