Fixes #2828.

R=ken2
CC=golang-dev
https://golang.org/cl/5653065

R=ken2
CC=golang-dev
https://golang.org/cl/5654060

Apparently l and $1 were the same register on Linux.
On the other systems, the compiler caught it.

R=ken2
CC=golang-dev
https://golang.org/cl/5654061

Fixes #2804.

R=ken2
CC=golang-dev
https://golang.org/cl/5652067

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5652066

Fixes #2716.

R=ken2
CC=golang-dev
https://golang.org/cl/5652065

Otherwise lockorder may be misaligned, since lockorder is a
list of pointers and pollorder is a list of uint16.
Discovered running gccgo (which uses a modified copy of this
code) on SPARC.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5655054

If the values being compared have different concrete types,
then they're clearly unequal without needing to invoke the
actual interface compare routine.  This speeds tests for
specific values, like if err == io.EOF, by about 3x.

benchmark                  old ns/op    new ns/op    delta
BenchmarkIfaceCmp100             843          287  -65.95%
BenchmarkIfaceCmpNil100          184          182   -1.09%

Fixes #2591.

R=ken2
CC=golang-dev
https://golang.org/cl/5651073

Same fix as 6g, tripped by the 6g test case.

R=ken2
CC=golang-dev
https://golang.org/cl/5651074

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5651072

Fixes #1743.
(Actually was fixed earlier, but now we have proof.)

R=ken2
CC=golang-dev
https://golang.org/cl/5649064

Fixes #2295.

R=ken2
CC=golang-dev
https://golang.org/cl/5655057

Also show actual expression in message when possible.

Fixes #2599.

R=ken2
CC=golang-dev
https://golang.org/cl/5654059

Was trying to optimize a duplicate float64 move
by registerizing an int64.

Fixes #2588.

R=ken2
CC=golang-dev
https://golang.org/cl/5645086

This will help html/template copy templates.

R=golang-dev, gri, nigeltao, r
CC=golang-dev
https://golang.org/cl/5653062

Fix it twice: reuse registers more aggressively in cgen abop,
and also release R14 and R15, which are no longer m and g.

Fixes #2669.

R=ken2
CC=golang-dev
https://golang.org/cl/5655056

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5653056

This CL changes default SOL_SOCKET settings to mitigate connect
failure on OpenBSD or similar platforms which support randomized
transport protocol port number assignment.

Fixes #2830.

R=rsc, jsing
CC=golang-dev
https://golang.org/cl/5648044

R=nigeltao
CC=golang-dev
https://golang.org/cl/5649062

Fixes #2838.

R=rsc, r
CC=golang-dev
https://golang.org/cl/5651060

R=go.peter.90, n13m3y3r, gustavo
CC=golang-dev
https://golang.org/cl/5655053

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5645085

Fixes #2927.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5651062

Fixes #2939.

R=rsc, r
CC=golang-dev
https://golang.org/cl/5655050

Should be obviously correct.  Includes minimal test case.
A future CL should clear up the logic around typecheckok and importpkg != nil someday.

R=rsc, dsymonds, rsc
CC=golang-dev
https://golang.org/cl/5652057

make syscall.ProcAttr.Files be []uintptr

all.bash passes on Linux.
things seem to compile on GOOS={darwin,windows}

R=golang-dev, mattn.jp, alex.brainman, rsc
CC=golang-dev
https://golang.org/cl/5653055

Fixes #2932

R=gri
CC=golang-dev
https://golang.org/cl/5654046

- Added test case for issue 1542.

Fixes #1542.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5645080

If a printer is configured with the SourcePos mode
set, it will emit //-line comments as necessary to
ensure that the result - if reparsed - reflects the
original source position information.

This change required a bit of reworking of the
output section in printer.go. Specifically:

- Introduced new Config mode 'SourcePos'.

- Introduced new position 'out' which tracks the
position of the generated output if it were read
in again. If there is a discrepancy between out
and the current AST/source position, a //line
comment is emitted to correct for it.

- Lazy emission of indentation so that //line
comments can be placed correctly. As a result,
the trimmer will have to do less work.

- Merged writeItem into writeString.

- Merged writeByteN into writeByte.

- Use a []byte instead of a byte.Buffer both in the
printer and in the trimmer (eliminates dependency).

Also: introduced explicit printer.Mode type (in
sync w/ parser.Mode, scanner.Mode, etc.)

Runs all tests. Applied gofmt to src, misc w/o changes.

Fixes #1047.
Fixes #2697.

R=rsc, rsc
CC=golang-dev
https://golang.org/cl/5643066

(*Writer, error) if they take a compression level, and *Writer otherwise.
Rename gzip's Compressor and Decompressor to Writer and Reader, similar to
flate and zlib.

Clarify commentary when writing gzip metadata that is not representable
as Latin-1, and fix io.EOF comment bug.

Also refactor gzip_test to be more straightforward.

Fixes #2839.

R=rsc, r, rsc, bradfitz
CC=golang-dev
https://golang.org/cl/5639057

Actually %GOBUILDEXIT% I suppose.

R=golang-dev
CC=golang-dev
https://golang.org/cl/5651058

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5651057

not sure that it will work, but.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5649051

Relax. It's still in macho.go.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5653054

Fixes #2954.

R=golang-dev, bradfitz, rsc, r
CC=golang-dev
https://golang.org/cl/5645077

Fixes #2940.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5645078

This is for filling a column with "fail", like I just did for
Windows, when the builder would get stuck running that
build.  (We have safeguards against the tests getting stuck
but this was the bootstrap build getting stuck.)

I usually use -cmd=/bin/false, but this avoids the Mercurial
checkouts, which means it runs instantly instead of requiring
~1 minute per "fail".

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/5649049

Fixes #2931.

R=golang-dev, alex.brainman
CC=golang-dev, rsc
https://golang.org/cl/5651049

Fixes #2952.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5651054

Fixes #2948

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5655048