fix bug in codegen when we modified move instruction instead of text.
fix bug in codegen when we modified move instruction instead
of text.

R=rsc
APPROVED=rsc
DELTA=3  (1 added, 2 deleted, 0 changed)
OCL=31575
CL=31575

webfd/go-zh,bryanxu/go-zh,webfd/go-zh,npe9/noahevans-go9,rflanagan/reginaldflanagan-project1,webfd/go-zh,sanjosh/sanjos100-tipc,sanjosh/sanjos100-tipc,glycerine/jeaten-go-arrayof-structof,rflanagan/reginaldflanagan-project1,rflanagan/reginaldflanagan-project1,scirelli/scirelli-go,d0f/go-zh,d0f/go-zh,rflanagan/reginaldflanagan-project1,npe9/noahevans-go9,Triskite/willstone-goclone,webfd/go-zh,scirelli/scirelli-go,sanjosh/sanjos100-tipc,bryanxu/go-zh,glycerine/jeaten-go-arrayof-structof,bryanxu/go-zh,scirelli/scirelli-go,rflanagan/reginaldflanagan-project1,mhennings/marcohennings-go,glycerine/jeaten-go-arrayof-structof,rdp/rogerpack2005-golang,mhennings/marcohennings-go,d0f/go-zh,d0f/go-zh,bryanxu/go-zh,Triskite/willstone-goclone,scirelli/scirelli-go,npe9/noahevans-go9,rdp/rogerpack2005-golang,scirelli/scirelli-go,rdp/rogerpack2005-golang,rdp/rogerpack2005-golang,glycerine/jeaten-go-arrayof-structof,rdp/rogerpack2005-golang,glycerine/jeaten-go-arrayof-structof,bryanxu/go-zh,webfd/go-zh,mhennings/marcohennings-go,glycerine/jeaten-go-arrayof-structof,Triskite/willstone-goclone,rflanagan/reginaldflanagan-project1,Triskite/willstone-goclone,d0f/go-zh,webfd/go-zh,sanjosh/sanjos100-tipc,glycerine/jeaten-go-arrayof-structof,sanjosh/sanjos100-tipc,d0f/go-zh,scirelli/scirelli-go,mhennings/marcohennings-go,Triskite/willstone-goclone,npe9/noahevans-go9,d0f/go-zh,mhennings/marcohennings-go,npe9/noahevans-go9,scirelli/scirelli-go,rdp/rogerpack2005-golang,rdp/rogerpack2005-golang,webfd/go-zh,npe9/noahevans-go9,bryanxu/go-zh,rdp/rogerpack2005-golang,sanjosh/sanjos100-tipc,mhennings/marcohennings-go,Triskite/willstone-goclone,mhennings/marcohennings-go,bryanxu/go-zh,mhennings/marcohennings-go,bryanxu/go-zh,glycerine/jeaten-go-arrayof-structof,npe9/noahevans-go9,sanjosh/sanjos100-tipc,npe9/noahevans-go9,rflanagan/reginaldflanagan-project1,Triskite/willstone-goclone,scirelli/scirelli-go,webfd/go-zh,sanjosh/sanjos100-tipc,rflanagan/reginaldflanagan-project1,d0f/go-zh,Triskite/willstone-goclone