Fix StoreIndexedInstr input representation requirements for Int32/Uint32 arrays.

runtime/vm/il_printer.cc

Index: runtime/vm/il_printer.cc
diff --git a/runtime/vm/il_printer.cc b/runtime/vm/il_printer.cc
index 26168147049ff47da59db977aa5df80ff6c43598..e973258a0008136a2cc81a4981d2a0f14528a141 100644
--- a/runtime/vm/il_printer.cc
+++ b/runtime/vm/il_printer.cc
@@ -1043,10 +1043,19 @@ void PhiInstr::PrintTo(BufferFormatter* f) const {
 }
 
 
+void UnboxIntNInstr::PrintOperandsTo(BufferFormatter* f) const {
+  if (is_truncating()) {
+    f->Print("[tr], ");
+  }
+  Definition::PrintOperandsTo(f);
+}
+
+
 void UnboxedIntConverterInstr::PrintOperandsTo(BufferFormatter* f) const {
-  f->Print("%s->%s, ",
+  f->Print("%s->%s%s, ",
            RepresentationToCString(from()),
-           RepresentationToCString(to()));
+           RepresentationToCString(to()),
+           is_truncating() ? "[tr]" : "");
   Definition::PrintOperandsTo(f);
 }