at PC, to deal with functions that end with a CALL
instruction.  Special case known call-by-return functions.

R=rsc
APPROVED=rsc
DELTA=12  (6 added, 6 deleted, 0 changed)
OCL=33255
CL=33279

R=rsc
OCL=33273
CL=33276

R=r
DELTA=49  (0 added, 14 deleted, 35 changed)
OCL=33272
CL=33272

R=rsc
DELTA=2339  (19 added, 2303 deleted, 17 changed)
OCL=33239
CL=33253

R=rsc
APPROVED=rsc
DELTA=9  (4 added, 3 deleted, 2 changed)
OCL=33238
CL=33251

backtraces don't work,
but they didn't work when i started either.

R=ken
OCL=33230
CL=33230

R=rsc
APPROVED=rsc
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=33209
CL=33227

  archive size +70%
  binary size +30%

old

wreck.mtv=; ls -l /Users/rsc/bin/{godoc,gofmt}
-rwxr-xr-x  1 rsc  eng  1487922 Aug 13 13:21 /Users/rsc/bin/godoc
-rwxr-xr-x  1 rsc  eng   995995 Aug 13 13:21 /Users/rsc/bin/gofmt
wreck.mtv=; du -sh $GOROOT/pkg/
9.5M	/home/rsc/go/pkg/
wreck.mtv=;

new

wreck.mtv=; ls -l /Users/rsc/bin/{godoc,gofmt}
-rwxr-xr-x  1 rsc  eng  2014390 Aug 13 14:25 /Users/rsc/bin/godoc
-rwxr-xr-x  1 rsc  eng  1268705 Aug 13 14:25 /Users/rsc/bin/gofmt
wreck.mtv=; du -sh $GOROOT/pkg
 16M	/home/rsc/go/pkg
wreck.mtv=;

R=ken
OCL=33217
CL=33220

R=r
DELTA=67  (17 added, 29 deleted, 21 changed)
OCL=33215
CL=33219

R=rsc
DELTA=204  (153 added, 49 deleted, 2 changed)
OCL=33213
CL=33213

R=gri
DELTA=4  (0 added, 4 deleted, 0 changed)
OCL=33202
CL=33204

also fix the comments in the generated files.

R=rsc
DELTA=949  (470 added, 465 deleted, 14 changed)
OCL=33197
CL=33201

R=rsc
DELTA=38  (21 added, 3 deleted, 14 changed)
OCL=33193
CL=33200

OCL=33178
CL=33180

bug039.go:6:7: error: redefinition of 'x'
bug039.go:5:1: note: previous definition of 'x' was here

bug049.go:6:9: error: incompatible types in binary expression

bug062.go:6:7: error: incompatible type in initialization

bug086.go:5:1: error: control reaches end of non-void function

bug103.go:8:2: error: variable has no type

bug121.go:9:2: error: expected signature or type name

bug131.go:7:7: error: incompatible type in initialization

bug165.go:10:8: error: expected complete type

bug171.go:5:1: error: control reaches end of non-void function
bug171.go:6:1: error: control reaches end of non-void function

bug172.go:7:6: error: expected integer type

bug182.go:7:2: error: if statement expects boolean expression

bug183.go:10:5: error: incompatible types in assignment
bug183.go:19:5: error: incompatible types in assignment

R=rsc
DELTA=15  (0 added, 0 deleted, 15 changed)
OCL=33168
CL=33175

R=rsc
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=33174
CL=33174

R=gri,iant
DELTA=47  (43 added, 0 deleted, 4 changed)
OCL=33127
CL=33173

R=rsc
DELTA=30  (5 added, 0 deleted, 25 changed)
OCL=33138
CL=33170

no types yet.

R=ken
OCL=33142
CL=33146

R=ken
OCL=33144
CL=33144

R=ken
OCL=33134
CL=33141

R=rsc
APPROVED=rsc
DELTA=334  (110 added, 211 deleted, 13 changed)
OCL=33135
CL=33137

R=rsc
APPROVED=rsc
DELTA=15  (9 added, 6 deleted, 0 changed)
OCL=33136
CL=33136

character string to machine address.
not filled in, just carved out.

R=austin
DELTA=77  (11 added, 34 deleted, 32 changed)
OCL=33122
CL=33124

R=ken
OCL=33123
CL=33123

R=r
DELTA=827  (0 added, 826 deleted, 1 changed)
OCL=33117
CL=33120

TBR=austin
DELTA=9  (4 added, 4 deleted, 1 changed)
OCL=33115
CL=33115

R=ken
OCL=33108
CL=33113

R=r
DELTA=31  (2 added, 28 deleted, 1 changed)
OCL=33064
CL=33112

R=r
DELTA=163  (1 added, 149 deleted, 13 changed)
OCL=33106
CL=33111

R=r
DELTA=6  (4 added, 0 deleted, 2 changed)
OCL=33107
CL=33110

R=rsc
APPROVED=rsc
DELTA=22  (22 added, 0 deleted, 0 changed)
OCL=33053
CL=33104

R=rsc
OCL=33103
CL=33103

had to reorder some init code.

R=r
DELTA=136  (15 added, 110 deleted, 11 changed)
OCL=33071
CL=33102

to whole-package compilation.

R=r
OCL=33070
CL=33101

mostly removing forward declarations.

R=r
DELTA=138  (2 added, 127 deleted, 9 changed)
OCL=33068
CL=33099

gobuild is obsolete; don't build it (will delete eventually).

revised gotest for whole-package compilation.

R=r
DELTA=102  (68 added, 6 deleted, 28 changed)
OCL=33067
CL=33098

whole-package compilation.  new Makefiles,
tests now in separate package

	bytes
	flag
	fmt
	io
	math
	once
	os
	reflect
	strconv
	sync
	time
	utf8

delete import "xxx" in package xxx.

inside package xxx, xxx is not declared
anymore so s/xxx.//g

delete file and package level forward declarations.

note the new internal_test.go and sync
and strconv to provide public access to
internals during testing.  the installed version
of the package omits that file and thus does
not open the internals to all clients.

R=r
OCL=33065
CL=33097

8g: save AX/DX around div

R=ken
OCL=33094
CL=33096

R=ken
OCL=33063
CL=33095