4d3a5f658a
Adding a new kind of PcDescriptor to mark the location of function returns in generated code. This will be needed to put a single-step breakpoint just before the function return. Also adding a NOP instruction after the ret, so that the function return code pattern adds up to 5 bytes, which is needed to patch in a breakpoint call. Review URL: https://chromiumcodereview.appspot.com//9385022 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@4159 260f80e4-7a28-3924-810f-c04153c831b5