visible only when enabling internal debug mode:
- in rare cases expression depth can underflow
- when printing a single labeled statement, indentation
  may underflow if not setup correctly

R=rsc
CC=golang-dev
https://golang.org/cl/484041

R=rsc
CC=golang-dev
https://golang.org/cl/461041

- go/filter.go: make MergePackageFiles smarter
- go/printer.go: handle positions from multiple files

R=rsc
CC=golang-dev
https://golang.org/cl/460042

R=r
CC=golang-dev
https://golang.org/cl/444043

Problem pointed out by rsc.

R=rsc
CC=golang-dev
https://golang.org/cl/444041

This was discussed with Ken and Russ.  6g has been changed,
and both compilers now work this way.  This avoids a double
type conversion--first to the float type, then to the complex
type.

R=r
CC=golang-dev, ken2, rsc
https://golang.org/cl/419042

R=rsc
CC=golang-dev
https://golang.org/cl/424041

R=rsc
CC=golang-dev
https://golang.org/cl/238042

R=rsc
CC=golang-dev
https://golang.org/cl/384044

R=r
CC=golang-dev
https://golang.org/cl/382045

- on the commandline: godoc -x big
- in a webpage: provide form parameter ?m=src

Known issues:
- Positioning of comments incorrect in several cases. Separate CL.
- Need a link/menu to switch between different modes of presentation
  in the web view.

R=rsc
CC=golang-dev
https://golang.org/cl/376041

R=ken2
CC=golang-dev
https://golang.org/cl/384043

R=ken2
CC=golang-dev
https://golang.org/cl/417042

R=r
CC=golang-dev
https://golang.org/cl/391041

2. add complex algorithm for map/chan
3. test for use of complex in
   array, slice, field, chan, map,
   field, pointer.

R=rsc
CC=golang-dev
https://golang.org/cl/384041

R=ken2
CC=golang-dev
https://golang.org/cl/370041

lots of missing parts, but builds and can call dlls, see a sample code in syscall_mingw.go

R=rsc
CC=golang-dev
https://golang.org/cl/218042

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/369041

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/367041

R=rsc
CC=golang-dev
https://golang.org/cl/357043

c = cmplx(imag(c), real(c))
without a temporary

R=rsc
CC=golang-dev
https://golang.org/cl/360043

for 6g and 8g. can also be used
for 5g. 5g is still a stub.

R=rsc
CC=golang-dev
https://golang.org/cl/362041

trivial stuff
lex.c: these prototypes are in a.h
asm.c: unused variables
arm-pass.txt deal w/ sieve.go rename and addition of sieve2.go

R=kaib, rsc
CC=golang-dev
https://golang.org/cl/244041

R=rsc
CC=golang-dev
https://golang.org/cl/224081

R=agl1, rsc
CC=golang-dev
https://golang.org/cl/253045

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/258041

R=rsc
CC=golang-dev
https://golang.org/cl/302042

R=rsc
CC=golang-dev
https://golang.org/cl/240043

R=r
CC=cemeyer, golang-dev
https://golang.org/cl/313041

do not convert to float prematurely.

R=ken2
CC=golang-dev
https://golang.org/cl/311041

Fixes #654.

R=ken2
CC=golang-dev
https://golang.org/cl/310041

This keeps fragmentation from delaying
garbage collections (and causing more fragmentation).

Cuts fresh godoc (with indexes) from 261M to 166M (120M live).
Cuts toy wc program from 50M to 8M.

Fixes #647.

R=r, cw
CC=golang-dev
https://golang.org/cl/257041

R=gri, r
CC=golang-dev
https://golang.org/cl/294042

R=r
CC=golang-dev
https://golang.org/cl/296042

Previously we would require safe primes for our RSA key generation.
Since this took rather a long time, this removes the requirement that
the primes be safe.

OpenSSL doesn't use safe primes for RSA key generation either
(openssl-0.9.8l/crypto/rsa/rsa_gen.c:122)

Fixes #649.

R=rsc
CC=golang-dev
https://golang.org/cl/253041

R=rsc, adg, r
CC=golang-dev
https://golang.org/cl/264041

R=r
CC=golang-dev
https://golang.org/cl/247041

add tests.

R=rsc, ken2, ken3
CC=golang-dev
https://golang.org/cl/261041

R=r
CC=golang-dev
https://golang.org/cl/254043

8g and 5g have stubs to ignore complex

R=rsc
CC=golang-dev
https://golang.org/cl/257042