Mucheckstack: Add memmove to rts subprograms

Summary: Declare 32 bytes of stack usage: 8 %rbp + 24 for three locals (D, S, C).

Reviewers: #muen, ken

Reviewed By: #muen, ken

Subscribers: ken

Differential Revision: https://dev.codelabs.ch/D1395

Author: reet-

mucheckstack/src/stackcheck.adb

@@ -117,8 +117,7 @@ is
       Files.For_Each_File (Files   => CIs,
                            Process => Parse_File'Access);
 
-      --  Add stack usage information for mem[cmp|cpy|set] subprograms provided
-      --  by RTS.
+      --  Add stack usage information for mem* subprograms provided by RTS.
 
       Types.Add_Node (Graph      => CFG,
                       Subprogram => Types.Create (Name          => "memcmp",
@@ -130,6 +129,12 @@ is
                                                   Stack_Usage   => 0,
                                                   Dynamic_Stack => False,
                                                   Bounded_Stack => False));
+      --  8 %rbp + 24 for three locals (D, S, C).
+      Types.Add_Node (Graph      => CFG,
+                      Subprogram => Types.Create (Name          => "memmove",
+                                                  Stack_Usage   => 32,
+                                                  Dynamic_Stack => False,
+                                                  Bounded_Stack => False));
       Types.Add_Node (Graph      => CFG,
                       Subprogram => Types.Create (Name          => "memset",
                                                   Stack_Usage   => 0,