[arm64][turbofan] Fix add+shr for big shift values.

test/cctest/compiler/test-run-machops.cc

Index: test/cctest/compiler/test-run-machops.cc
diff --git a/test/cctest/compiler/test-run-machops.cc b/test/cctest/compiler/test-run-machops.cc
index 195f0a91dcb440c794bf8d7f2d96a3776d17f266..c8261aea49ff38249d5634995bdd7a7d202bcb81 100644
--- a/test/cctest/compiler/test-run-machops.cc
+++ b/test/cctest/compiler/test-run-machops.cc
@@ -6709,6 +6709,29 @@ TEST(ParentFramePointer) {
   CHECK_EQ(1, r.Call(1));
 }
 
+#if V8_TARGET_ARCH_64_BIT
+
+TEST(Regression5923) {
+  {
+    BufferedRawMachineAssemblerTester<int64_t> m(MachineType::Int64());
+    m.Return(m.Int64Add(
+        m.Word64Shr(m.Parameter(0), m.Int64Constant(4611686018427387888)),
+        m.Parameter(0)));
+    int64_t input = 16;
+    m.Call(input);
+  }
+  {
+    BufferedRawMachineAssemblerTester<int64_t> m(MachineType::Int64());
+    m.Return(m.Int64Add(
+        m.Parameter(0),
+        m.Word64Shr(m.Parameter(0), m.Int64Constant(4611686018427387888))));
+    int64_t input = 16;
+    m.Call(input);
+  }
+}
+
+#endif  // V8_TARGET_ARCH_64_BIT
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8