More robustness in case of incorrect programs.

Fixes #4962.

R=dsymonds
CC=golang-dev
https://golang.org/cl/7429047

swig >= 2.0.9 requires the size of int values to be passed via a command line flag. Should swig complain about the -intgosize not being supported, then alert the user to their outdated version of swig.

Fixes #4756.

R=golang-dev, minux.ma, iant
CC=golang-dev
https://golang.org/cl/7331048

Replacement for CL 7370053 which attempted to make fallthrough's
syntactically a part of switch statements. Because they may be
labeled, fixing that CL completely would require too much spec
surgery.

Fixes #4923.

R=r, iant, rsc, ken
CC=golang-dev
https://golang.org/cl/7416048

Also make the crossover point an architecture-dependent constant,
although it's the same everywhere for now.

BenchmarkAppendStr1Byte            416          145  -65.14%
BenchmarkAppendStr4Bytes           743          217  -70.79%
BenchmarkAppendStr8Bytes           421          270  -35.87%
BenchmarkAppendStr16Bytes          415          403   -2.89%
BenchmarkAppendStr32Bytes          415          391   -5.78%

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7459044

Update #3679.

BenchmarkAppend1Byte            484          199  -58.88%
BenchmarkAppend4Bytes           829          286  -65.50%
BenchmarkAppend8Bytes           484          365  -24.59%
BenchmarkAppend16Bytes          484          498   +2.89%
BenchmarkAppend32Bytes          486          484   -0.41%

R=iant, dave, rsc
CC=golang-dev
https://golang.org/cl/7443047

Fixes #4961.

R=golang-dev, r, minux.ma
CC=golang-dev
https://golang.org/cl/7443048

Fixes #4945.
Most examples in this issue now better, but #10 is incomplete and I'm not
certain how to reproduce it. It actually looks like a go/types problem, since
the type being reported is coming directly from that package.
Please reopen the issue if you disagree.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7448046

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7450049

Update #4961.

R=golang-dev
CC=golang-dev
https://golang.org/cl/7451044

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7429046

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7447044

R=gri, rsc
CC=golang-dev
https://golang.org/cl/7422051

Also: add support for pointer conversions, covered by one new test.

R=gri, bradfitz, dave
CC=golang-dev
https://golang.org/cl/7435047

Bridge methods for embedded interfaces were
passing the interface twice: once as receiver,
once as first param.
Covered by $GOROOT/test/ddd.go.

Also:
- invent names ("arg%d") for parameters if missing.
- refactoring: move common code for bridge methods into
  createParams and emitTailCall.

R=gri
CC=golang-dev
https://golang.org/cl/7437047

Update #4878.

R=golang-dev
CC=golang-dev
https://golang.org/cl/7450048

Update #4958.

R=golang-dev
CC=golang-dev
https://golang.org/cl/7434047

R=golang-dev
CC=golang-dev
https://golang.org/cl/7438052

Update #4955.

R=golang-dev
CC=golang-dev
https://golang.org/cl/7435049

Update #4956.

R=golang-dev
CC=golang-dev
https://golang.org/cl/7417048

Putting the M initialization in multiple places will not scale.
Various code assumes mstart is the start already. Make it so.

R=golang-dev, devon.odell
CC=golang-dev
https://golang.org/cl/7420048

Move the mstartfn into its own field.
Simpler, more likely to be correct.

R=golang-dev, devon.odell
CC=golang-dev
https://golang.org/cl/7414046

R=devon.odell
CC=golang-dev
https://golang.org/cl/7443046

Fixes #4948.

R=golang-dev, alex.brainman
CC=golang-dev
https://golang.org/cl/7445045

This time for sure.

R=golang-dev
CC=golang-dev
https://golang.org/cl/7449045

Distribute runnable queues, memory cache
and cache of dead G's per processor.
Faster non-blocking syscall enter/exit.
More conservative worker thread blocking/unblocking.

R=dave, bradfitz, remyoudompheng, rsc
CC=golang-dev
https://golang.org/cl/7314062

There is a #pragma dynexport crosscall2, to help SWIG,
and 6l cannot export the symbol if it doesn't get to see it.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7448044

During my global search and replace I forgot to open *.S (capital).

R=golang-dev
TBR=golang-dev
CC=golang-dev
https://golang.org/cl/7415047

Switch to new pragma names, but leave old ones available for now.
Merge the three cgo-related sections in the .6 files into a single
cgo section.

R=golang-dev, iant, ality
CC=golang-dev
https://golang.org/cl/7424048

R=golang-dev, rsc
CC=golang-dev, minux.ma
https://golang.org/cl/7424047

Fixes #4950.

R=golang-dev, peter
CC=golang-dev
https://golang.org/cl/7415046

Fixes #4930.

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7424043

- implement windows pread;
- set correct Fhdr.type;
- add ImageBase to all pe "virtual" addresses;
- correct settext parameter order;
- use pclntab/epclntab to find line numbers.

Fixes #4841.
Fixes #4926.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7405050

R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/7439048

Now that untyped expressions are done in two phases, the
identity of operand.expr is used as a map key; when reusing
operand values we now must be careful to update the
expr field.

R=gri
CC=golang-dev
https://golang.org/cl/7444049

Fixes #4767

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/7435046

R=golang-dev, nigeltao, adg
CC=golang-dev
https://golang.org/cl/7444048

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/7454044

R=r
CC=golang-dev
https://golang.org/cl/7442045

net/http/cookiejar.

This is a straight rename. There are no code changes.

Fixes #1960.

R=rsc, adg
CC=dr.volker.dobler, golang-dev
https://golang.org/cl/7436043

Fixes #4942.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/7444047