This change deletes the C implementations of
the Go compiler and assembler from the master branch.

The Go implementations are a bit slower right now,
due mainly to garbage generated by taking addresses
of stack variables all over the place (it was C code,
after all). That will be cleaned up (mechanically) over the
next week or so, and things will get faster.

Change-Id: I66b2b3477aec8835f9960d0798f5752dcd98d08f

The slow path of heapBitsForObjects somewhat subtly assumes that the
pointer will not point to the first word of the object and will round
the pointer wrong if this assumption is violated.  This assumption is
safe because the fast path should always take care of this case, but
there's no benefit to making this assumption, it makes the code more
difficult to experiment with than necessary, and it's trivial to
eliminate.

Change-Id: Iedd336f7d529a27d3abeb83e77dfb32a285ea73a
Reviewed-on: https://go-review.googlesource.com/5636Reviewed-by: Russ Cox <rsc@golang.org>

May fix windows build.

Change-Id: Ic4e32a4478caf758da6b02bc9126ddacb0fc07e0
Reviewed-on: https://go-review.googlesource.com/5650
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

Ran rsc.io/grind rev 6f0e601 on the source files.

The cleanups move var declarations as close to the use
as possible, splitting disjoint uses of the var into separate
variables. They also remove dead code (especially in
func sudoaddable), which helps with the var moving.

There's more cleanup to come, but this alone cuts the
time spent compiling html/template on my 2013 MacBook Pro
from 3.1 seconds to 2.3 seconds.

Change-Id: I4de499f47b1dd47a560c310bbcde6b08d425cfd6
Reviewed-on: https://go-review.googlesource.com/5637Reviewed-by: Rob Pike <r@golang.org>

Fixes #9939.

Change-Id: I9d60722b648fbc00650115da539a7466c6c86552
Reviewed-on: https://go-review.googlesource.com/5640Reviewed-by: Alan Donovan <adonovan@google.com>

It's using debug mode of pprof.writeBlock, so the output actually goes
through text/tabwriter. It is possible that tabwriter expands each tab
into multiple tabs in certain cases.

For example, this output has been observed on the new arm64 port:
10073805 1 @ 0x1088ec 0xd1b8c 0xd0628 0xb68c0 0x867f4
#	0x1088ec	sync.(*Cond).Wait+0xfc				/home/minux/go.git/src/sync/cond.go:63
#	0xd1b8c		runtime/pprof_test.blockCond+0x22c		/home/minux/go.git/src/runtime/pprof/pprof_test.go:454
#	0xd0628		runtime/pprof_test.TestBlockProfile+0x1b8	/home/minux/go.git/src/runtime/pprof/pprof_test.go:359
#	0xb68c0		testing.tRunner+0x140				/home/minux/go.git/src/testing/testing.go:447

10069965 1 @ 0x14008 0xd1390 0xd0628 0xb68c0 0x867f4
#	0x14008	runtime.chansend1+0x48				/home/minux/go.git/src/runtime/chan.go:76
#	0xd1390	runtime/pprof_test.blockChanSend+0x100		/home/minux/go.git/src/runtime/pprof/pprof_test.go:396
#	0xd0628	runtime/pprof_test.TestBlockProfile+0x1b8	/home/minux/go.git/src/runtime/pprof/pprof_test.go:359
#	0xb68c0	testing.tRunner+0x140				/home/minux/go.git/src/testing/testing.go:447

10069706 1 @ 0x108e0c 0xd193c 0xd0628 0xb68c0 0x867f4
#	0x108e0c	sync.(*Mutex).Lock+0x19c			/home/minux/go.git/src/sync/mutex.go:67
#	0xd193c		runtime/pprof_test.blockMutex+0xbc		/home/minux/go.git/src/runtime/pprof/pprof_test.go:441
#	0xd0628		runtime/pprof_test.TestBlockProfile+0x1b8	/home/minux/go.git/src/runtime/pprof/pprof_test.go:359
#	0xb68c0		testing.tRunner+0x140				/home/minux/go.git/src/testing/testing.go:447

Change-Id: I3bef778c5fe01a894cfdc526fdc5fecb873b8ade
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/5554Reviewed-by: Dmitry Vyukov <dvyukov@google.com>

Old 45.3 ns/op, new 19.9 ns/op.

Change-Id: If2a201981dcc259846631ecbc694c401e0a80287
Reviewed-on: https://go-review.googlesource.com/5260Reviewed-by: Russ Cox <rsc@golang.org>

Change-Id: I58e00a39cf63df07813d21453f91e68eef6a413c
Reviewed-on: https://go-review.googlesource.com/5635Reviewed-by: Rob Pike <r@golang.org>

Also stop building objwriter, which was only used by them.

Change-Id: Ia2353abd9426026a81a263cb46a72dd39c360ce4
Reviewed-on: https://go-review.googlesource.com/5634Reviewed-by: Rob Pike <r@golang.org>

Convert using rsc.io/c2go rev a97ff47.

Notable changes:
- %% in format string now correctly preserved
- reintroduce "signal handler" to hide internal faults
  after errors have been printed

Change-Id: Ic5a94f1c3a8015a9054e21c8969b52d964a36c45
Reviewed-on: https://go-review.googlesource.com/5633Reviewed-by: Rob Pike <r@golang.org>

These don't work with the new compiler, because the
new compiler doesn't have the custom syntax errors
that I built for the old compiler. It will, just not yet.
(Issue #9968.)

Change-Id: I658f7dab2c7f855340a501f9ae4479c097b28cd3
Reviewed-on: https://go-review.googlesource.com/5632Reviewed-by: Rob Pike <r@golang.org>

Change-Id: I40839c2d1c0c105a5ba9aadcb55a13693bf4afa6
Reviewed-on: https://go-review.googlesource.com/5592Reviewed-by: Russ Cox <rsc@golang.org>

Change-Id: I3417efc203f555a0a6101701f387ead84f9a08d1
Reviewed-on: https://go-review.googlesource.com/5577Reviewed-by: Rob Pike <r@golang.org>

To pick up darwin/arm fix and hopefully fix build.

Change-Id: I06996d0b13b777e476f65405aee031482fc76439

Fixes $9938.

Change-Id: Ie8680a875225748abd660fb26b4c25546e7b92d3
Reviewed-on: https://go-review.googlesource.com/5620Reviewed-by: Alan Donovan <adonovan@google.com>

The routine mallocgc retrieves objects from freelists. Prefetch
the object that will be returned in the next call to mallocgc.
Experiments indicate that this produces a 1% improvement when using
prefetchnta and less when using prefetcht0, prefetcht1, or prefetcht2.

Benchmark numbers indicate a 1% improvement over no
prefetch, much less over prefetcht0, prefetcht1, and prefetcht2.
These numbers were for the garbage benchmark with MAXPROCS=4
no prefetch                          >> 5.96 / 5.77 / 5.89
prefetcht0(uintptr(v.ptr().next))    >> 5.88 / 6.17 / 5.84
prefetcht1(uintptr(v.ptr().next))    >> 5.88 / 5.89 / 5.91
prefetcht2(uintptr(v.ptr().next))    >> 5.87 / 6.47 / 5.92
prefetchnta(uintptr(v.ptr().next))   >> 5.72 / 5.84 / 5.85

Change-Id: I54e07172081cccb097d5b5ce8789d74daa055ed9
Reviewed-on: https://go-review.googlesource.com/5350Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Austin Clements <austin@google.com>

Fixes #9948.

Change-Id: I7b354fccd5e933eeeb2253a66acec050ebff6e41
Reviewed-on: https://go-review.googlesource.com/5611Reviewed-by: Alan Donovan <adonovan@google.com>

Change-Id: Ida847365223ef09b4a3846e240b4bb6919cb0fe9
Reviewed-on: https://go-review.googlesource.com/5610Reviewed-by: Alan Donovan <adonovan@google.com>

The code concerning quoted-printable encoding (RFC 2045) and its
variant for MIME headers (RFC 2047) is currently spread in
mime/multipart and net/mail. It is also not exported.

This commit is the second step to fix that issue. It moves the
RFC 2047 encoding and decoding functions from net/mail to
internal/mime. The exported API is unchanged.

Updates #4943

Change-Id: I5f58aa58e74bbe4ec91b2e9b8c81921338053b00
Reviewed-on: https://go-review.googlesource.com/2101Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

We currently have only one supported darwin/arm device, a locked iOS
machine. It requires cgo binaries.

Change-Id: If36a152e6a743e4a58ea3470e62cccb742630a5d
Reviewed-on: https://go-review.googlesource.com/5443Reviewed-by: Russ Cox <rsc@golang.org>

Should fix nacl build on dev.cc.

Change-Id: I166a03b5f6903bd8bbce65af4e5f2899807bb6cc
Reviewed-on: https://go-review.googlesource.com/5575Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>

Makes them compatible with the new asm.
Applied mechanically from vet diagnostics.

Manual edits: the names for arguments in time·now(SB) in runtime/sys_*_arm.s.

Change-Id: Ib295390d9509d306afc67714e3f50dc832256625
Reviewed-on: https://go-review.googlesource.com/5576
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

Converted from rsc.io/c2go rev a9bc7f2.
Adds profiling support.

Change-Id: Ie04f86b71e0713c7294416c77d349e0d93798403
Reviewed-on: https://go-review.googlesource.com/5574Reviewed-by: Rob Pike <r@golang.org>

Change-Id: I10f7950d173b302151f2a31daebce297b4306ebe

This was supposed to be in the previous CL, but I forgot to 'git rw' it down.

Change-Id: Ia5e14ca2c7640f08abbbed1a777a6cf04d71d0e7
Reviewed-on: https://go-review.googlesource.com/5570Reviewed-by: Russ Cox <rsc@golang.org>

Change-Id: I259e88f019b6818c57caaa1ec236b7c2e2ae1382
Reviewed-on: https://go-review.googlesource.com/5551Reviewed-by: Rob Pike <r@golang.org>

The wildcard 'std' is defined in documentation to be all the packages
in the Go standard library. It has also historically matched commands
in the main repo, but as we implement core commands in Go, that
becomes problematic. We need a wildcard that means just the library,
and since 'std' is already documented to have that definition, make it so.

Add a new wildcard 'cmd' for the commands in the main repo ($GOROOT).
Commands that want both can say 'std cmd' (or 'cmd std') to get the
effect of the old 'std'.

Update make.bash etc to say both std and cmd most of the time.

Exception: in race.bash, do not install race-enabled versions of
the actual commands. This avoids trying to write binaries while
using them, but more importantly it avoids enabling the race
detector and its associated memory overhead for the already
memory-hungry compilers.

Change-Id: I26bb06cb13b636dfbe71a015ee0babeb270a0275
Reviewed-on: https://go-review.googlesource.com/5550
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

cpp: src/cmd/ld/lib.h:349 No newline at end of file

Change-Id: Id21851963f7778364ba9337da3bacd312443f51f
Reviewed-on: https://go-review.googlesource.com/5520Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: I239ae86cfebfece607dce39a96d9123cbacbee7d
Reviewed-on: https://go-review.googlesource.com/5562
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: I05cdf357249166a45105703e9317793aa2088844
Reviewed-on: https://go-review.googlesource.com/5560Reviewed-by: Andrew Gerrand <adg@golang.org>

With a trivial Golang-built program loaded in gdb-7.8.90.20150214-7.fc23.x86_64
I get this error:

(gdb) source ./src/runtime/runtime-gdb.py
Loading Go Runtime support.
Traceback (most recent call last):
  File "./src/runtime/runtime-gdb.py", line 230, in <module>
    _rctp_type = gdb.lookup_type("struct reflect.rtype").pointer()
gdb.error: No struct type named reflect.rtype.
(gdb) q

No matter if this struct should or should not be in every Golang-built binary
this change should fix that with no disadvantages.

Change-Id: I0c490d3c9bbe93c65a2183b41bfbdc0c0f405bd1
Reviewed-on: https://go-review.googlesource.com/5521Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I6011e162214db2d65efc1ecdb5ec600ca8e5bfe9
Reviewed-on: https://go-review.googlesource.com/5542Reviewed-by: Ian Lance Taylor <iant@golang.org>

Need to add testdata to NaCl's testing file system.

Change-Id: Ie9703b5475c7f87e737a06de85d1f88e2062f090
Reviewed-on: https://go-review.googlesource.com/5541Reviewed-by: Russ Cox <rsc@golang.org>

Change-Id: Ia6cf3204d71740bc2b6e26c53ac5206e8a33a180
Reviewed-on: https://go-review.googlesource.com/5540Reviewed-by: Russ Cox <rsc@golang.org>

Change-Id: Ic7367f2c6e6d4e6b802ce8436022412a1862ca58
Reviewed-on: https://go-review.googlesource.com/5472Reviewed-by: Rob Pike <r@golang.org>

Reconvert using rsc.io/c2go rev 27b3f59.
(Same as last conversion, but C sources have changed
due to merging master into this branch.)

Change-Id: Ib314bb9ac14a726ceb83e2ecf4d1ad2d0b331c38
Reviewed-on: https://go-review.googlesource.com/5471Reviewed-by: Rob Pike <r@golang.org>

This time for sure.

Change-Id: I77ed6b70d82a6f4ba371afba2f53c8b146ac110f
Reviewed-on: https://go-review.googlesource.com/5530Reviewed-by: Rob Pike <r@golang.org>

Representation in printout of MRC instruction differs between
32- and 64-bit machines. It's just a hex dump. Fix this one day,
but for now just comment out the instruction.

Change-Id: I4709390659e2e0f2d18ff6f8e762f97cdbfb4c16
Reviewed-on: https://go-review.googlesource.com/5424Reviewed-by: Rob Pike <r@golang.org>

Add trivial golden test that verifies output matches expectation.
The input is based on the old grammar and is intended to cover
the space of the input language.

PPC64 and ARM only for now; others to follow.

Change-Id: Ib5957822bcafd5b9d4c1dea1c03cc6ee1238f7ef
Reviewed-on: https://go-review.googlesource.com/5421Reviewed-by: Russ Cox <rsc@golang.org>

As with the previous round for ppc64, this CL fixes a couple of things
that 5a supported but asm did not, both simple.

1) Allow condition code on MRC instruction; this was marked as a TODO.
2) Allow R(n) notation in ARM register shifts.  The code needs a rethink
but the tests we're leading toward will make the rewrite easier to test and
trust.

Change-Id: I5b52ad25d177a74cf07e089dddfeeab21863c424
Reviewed-on: https://go-review.googlesource.com/5422Reviewed-by: Russ Cox <rsc@golang.org>