[vm, compiler] Fix mismatch between ARM's StoreIndexedInstr::MakeLoca…

…tionSummary and EmitNativeCode.

TEST=dartfuzz
Bug: #56948
Change-Id: I7241071df2aedb34a88817896005eb0fdff674eb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/391487
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>

runtime/tests/vm/dart/regress_56948_test.dart

@@ -0,0 +1,26 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// The Dart Project Fuzz Tester (1.101).
+// Program generated as:
+//   dart dartfuzz.dart --seed 2618914219 --no-fp --no-ffi --flat
+// @dart=2.14
+
+import 'dart:typed_data';
+import 'dart:io';
+
+@pragma("vm:never-inline")
+foo() {
+  Int8List(28).fillRange(-19, 25, 9223372034707292160);
+}
+
+main() {
+  try {
+    foo();
+  } catch (e, st) {
+    print('foo throws');
+  }
+
+  sleep(Duration(seconds: 3)); // Let background compiler catch up.
+}

runtime/vm/compiler/backend/il_arm.cc

@@ -2384,7 +2384,7 @@ LocationSummary* StoreIndexedInstr::MakeLocationSummary(Zone* zone,
       locs->set_in(2, Location::Pair(Location::RequiresRegister(),
                                      Location::RequiresRegister()));
     } else if (rep == kUnboxedInt8 || rep == kUnboxedUint8) {
-      locs->set_in(2, LocationRegisterOrConstant(value()));
+      locs->set_in(2, LocationRegisterOrSmiConstant(value()));
     } else {
       locs->set_in(2, Location::RequiresRegister());
     }