x.go:13: T is not I - missing M()

NOT
x.go:13: T is not I - missing Mfunc()

R=ken
OCL=24316
CL=24316

R=ken
OCL=23958
CL=23961

heuristic to not print bogus strings.
fix one error message format.

R=ken
OCL=23849
CL=23851

don't use intermediate register to move
32-or-fewer-bit immediate constants
into memory.

R=ken
OCL=23726
CL=23726

not pointers to structs.

fix defered dotdotdot.

R=r,ken
DELTA=25  (7 added, 5 deleted, 13 changed)
OCL=23620
CL=23625

R=r
OCL=23592
CL=23592

can be compared/hashed.

R=r
DELTA=351  (201 added, 80 deleted, 70 changed)
OCL=23423
CL=23481

implement hiding lowercase methods m in
signatures by adding in a hash of the package name
to the type hash code.

remove remaining checks for internally-generated _ names:
they are all gone.

R=ken
OCL=23236
CL=23238

   and don't put inaccessible private methods
   in signature.

R=ken
OCL=23138
CL=23140

R=ken
OCL=22454
CL=22457

can do methods on them without pointer worries.

R=ken
OCL=22434
CL=22436

remove TPTR wrapper around TMAP, TCHAN, TSTRING.

R=ken
OCL=22406
CL=22409

R=ken
OCL=22370
CL=22372

also, after
	func g() (int, int)
	func f(int, int)
allow
	f(g())
and
	func h() (int, int) { return g() }

R=ken
DELTA=356  (252 added, 26 deleted, 78 changed)
OCL=22319
CL=22325

new for pointers

R=r
OCL=22158
CL=22158

receivers in methods.
put back original code for hilbert/bignum

R=r
OCL=21910
CL=21920

other [] cleanup.

convert() is gone.

R=r
DELTA=352  (144 added, 68 deleted, 140 changed)
OCL=21660
CL=21662

R=r
DELTA=192  (145 added, 8 deleted, 39 changed)
OCL=21609
CL=21614

x.go:11: illegal types for operand: AS
	*I
	*T
	(*interface vs *struct)

R=r
DELTA=10  (8 added, 0 deleted, 2 changed)
OCL=21457
CL=21602

mainly a syntactic change: the compiler representations don't change
(chan and map are now hidden pointers like string).

R=ken
OCL=21578
CL=21582

R=ken
OCL=21565
CL=21565

R=r
OCL=21564
CL=21564

R=r
OCL=20834
CL=20834

a range m (implies :=)
a,b range m (implies :=)
a:b range m (implies :=)

a := range m
a,b := range m
a:b := range m

a = range m
a,b = range m
a:b = range m

R=r
OCL=20676
CL=20676

makes lineno correct for statements without semicolons.

R=ken
OCL=19454
CL=19454

R=ken
OCL=19299
CL=19299

to distinguish not computed (0) vs trivial (1).

add missing ullmancalc on function args.

R=ken
OCL=18711
CL=18711

i isolated last night.  does not fix rob's
interface-smashing bug.

R=ken
OCL=18698
CL=18698

R=r
OCL=18646
CL=18646

always show original name

R=ken
OCL=18603
CL=18603

	* allow conversion between nil interface and any type.
	* mark signatures as DUPOK so that multiple .6 can
	  contain sigt.*[]byte and only one gets used.

R=ken
OCL=18538
CL=18542

	sigi and sigt:
	sys·sigi_inter -> sigi·inter
	sys·sigt_int -> sigt·int
	Package·sigt_Type -> sigt·Package.Type

	local type T in file x.go T_x -> T·x
	second one T_x_1 -> T·x·1

	method names M on T  T_M -> T·M

correctly handle local embedded types

init functions are the only place left that use underscores

R=ken
OCL=18377
CL=18377

R=r
OCL=18319
CL=18319

R=r
OCL=18317
CL=18317

R=r
DELTA=44  (2 added, 15 deleted, 27 changed)
OCL=18270
CL=18273

R=ken
OCL=18202
CL=18202

R=ken
OCL=18180
CL=18180

distribute tag across multiple names.

R=ken
OCL=18178
CL=18178

R=ken
OCL=18176
CL=18176

R=r
OCL=18081
CL=18081