do not emit unreachable data symbols.

R=austin
DELTA=103  (71 added, 4 deleted, 28 changed)
OCL=33325
CL=33622

introduced explicit "data" symbol instead of etext
to mark beginning of data, so that using larger
alignment (i.e. 4MB like GNU loader) doesn't
confuse garbage collector.

split dodata into dodata and dobss in preparation
for putting the dynamic data + headers in the data
segment instead of stuffed at the beginning of the binary.

R=r
DELTA=52  (37 added, 3 deleted, 12 changed)
OCL=33610
CL=33618

R=r
DELTA=1  (1 added, 0 deleted, 0 changed)
OCL=33615
CL=33617

length-distance pairs.

The new test data was generated by "gzip shesells.txt", which is
presumably what you (rsc) did before, for the other test cases in
gunzip_test.go.

R=rsc
APPROVED=rsc
DELTA=21  (17 added, 2 deleted, 2 changed)
OCL=33582
CL=33616

R=rsc
DELTA=96  (25 added, 5 deleted, 66 changed)
OCL=33607
CL=33612

R=ken
OCL=33599
CL=33599

	go_spec.html#Return_statements

can be used to link to spec sections.  passes hlint.
renamed final section to simply "Implementation differences"
to shorten the name, but otherwise no non-formatting changes

R=gri
DELTA=230  (10 added, 0 deleted, 220 changed)
OCL=33598
CL=33598

remove ASCII digit comment that isn't true.

R=gri
DELTA=41  (1 added, 25 deleted, 15 changed)
OCL=33594
CL=33596

mark multifile section with TODO only
because that is a bigger change.

R=gri
DELTA=45  (9 added, 22 deleted, 14 changed)
OCL=33565
CL=33593

gzip.GzipInflater -> gzip.Inflater
gzip.NewGzipInflater -> gzip.NewInflater
zlib.NewZlibInflater -> zlib.NewInflater

io.ByteReader deleted in favor of bytes.Buffer
io.NewByteReader -> bytes.NewBuffer

R=r
DELTA=52  (3 added, 0 deleted, 49 changed)
OCL=33589
CL=33592

R=gri
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=33586
CL=33590

signed and unsigned integer conversions.

R=rsc
APPROVED=rsc
DELTA=398  (40 added, 230 deleted, 128 changed)
OCL=33546
CL=33569

R=rsc
APPROVED=rsc
DELTA=3  (0 added, 0 deleted, 3 changed)
OCL=33534
CL=33567

R=rsc
DELTA=12  (12 added, 0 deleted, 0 changed)
OCL=33554
CL=33563

import "fmt"
var fmt = 1

R=ken
OCL=33556
CL=33561

DELTA=137  (50 added, 24 deleted, 63 changed)
OCL=33476
CL=33553

R=rsc
DELTA=125  (13 added, 62 deleted, 50 changed)
OCL=33545
CL=33550

in the presence of yacc lookahead.
better but still not perfect

R=ken
OCL=33541
CL=33541

type names, gccgo no longer reports redefinition errors for
:=, because it no longer knows at parse time whether the type
has changed.  Adjust this test to not match "redefinition",
and to instead match gccgo's current output.

declbad.go:19:3: error: variables redeclared but no variable is new
declbad.go:34:3: error: variables redeclared but no variable is new
declbad.go:39:3: error: variables redeclared but no variable is new
declbad.go:44:3: error: variables redeclared but no variable is new
declbad.go:49:3: error: variables redeclared but no variable is new
declbad.go:24:3: error: incompatible types in assignment
declbad.go:29:3: error: incompatible types in assignment
declbad.go:39:3: error: incompatible types in assignment

R=rsc
DELTA=10  (0 added, 0 deleted, 10 changed)
OCL=33537
CL=33539

R=rsc
APPROVED=rsc
DELTA=104  (0 added, 33 deleted, 71 changed)
OCL=33531
CL=33535

R=rsc
DELTA=131  (61 added, 6 deleted, 64 changed)
OCL=33488
CL=33532

R=ken
OCL=33526
CL=33528

R=rsc
APPROVED=rsc
DELTA=2  (1 added, 0 deleted, 1 changed)
OCL=33518
CL=33527

R=rsc
DELTA=3  (0 added, 0 deleted, 3 changed)
OCL=33496
CL=33519

R=rsc
APPROVED=rsc
DELTA=1425  (1425 added, 0 deleted, 0 changed)
OCL=33432
CL=33517

re-enabling and massaging code.

R=rsc
APPROVED=rsc
DELTA=2496  (1880 added, 330 deleted, 286 changed)
OCL=33487
CL=33504

R=rsc
APPROVED=rsc
DELTA=84  (68 added, 4 deleted, 12 changed)
OCL=33493
CL=33499

R=rsc
APPROVED=rsc
DELTA=35  (30 added, 4 deleted, 1 changed)
OCL=33491
CL=33498

R=rsc
DELTA=263  (0 added, 263 deleted, 0 changed)
OCL=33466
CL=33485

- removed defs.go (moved declarations into arith.go where they belong)

R=r
DELTA=40  (16 added, 20 deleted, 4 changed)
OCL=33464
CL=33464

- implememted empty stubs for 386 assembly routines
- removed assembly code operating on single words (except for one)
- adjusted tests

R=rsc
DELTA=126  (46 added, 67 deleted, 13 changed)
OCL=33461
CL=33461

- changed Cmp to return -1, 0, +1
- added corresponding test cases

R=rsc
DELTA=173  (136 added, 3 deleted, 34 changed)
OCL=33431
CL=33459

R=rsc
APPROVED=rsc
DELTA=61  (61 added, 0 deleted, 0 changed)
OCL=33438
CL=33454

R=rsc
APPROVED=rsc
DELTA=35  (2 added, 1 deleted, 32 changed)
OCL=33436
CL=33453

R=rsc
APPROVED=rsc
DELTA=6  (0 added, 0 deleted, 6 changed)
OCL=33434
CL=33452

Since pres != nil was already checked and the routine sets *pres to false
and returns, the subsequent tests are unneeded.

R=rsc
APPROVED=rsc
DELTA=4  (0 added, 4 deleted, 0 changed)
OCL=33439
CL=33441

R=rsc
APPROVED=rsc
DELTA=204  (204 added, 0 deleted, 0 changed)
OCL=33437
CL=33440

does so in ways that permit its size to be known.

R=rsc
DELTA=35  (35 added, 0 deleted, 0 changed)
OCL=33427
CL=33433

bug165.go:13:6: error: invalid recursive type 'S'

This is a different line from the 6g error message, which is
"invalid map key type".  I accomodated both compilers by
merging the line.

bug188.go:13:2: error: unexpected reference to package

I made the error message less specific, which I think is fine
here.

R=rsc
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=33398
CL=33426

R=rsc
OCL=33418
CL=33418