Switch lowering splits each case expression out
into its own OCASE node.

Change-Id: Ifcb72b99975ed36da8540f6e43343e9aa2058572
Reviewed-on: https://go-review.googlesource.com/26769
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

This is a bit simpler than playing sorting games,
and it is clearer that it generates errors
in the correct (source) order.

It also allows us to simplify sorting.

It also prevents quadratic error messages for
(pathological) inputs with many duplicate type cases.

While we’re here, refactoring deduping into separate functions.

Negligible compilebench impact.

Fixes #15912.

Change-Id: I6cc19edd38875389a70ccbdbdf0d9b7d5ac5946f
Reviewed-on: https://go-review.googlesource.com/26762
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

Change-Id: If443ffb50b140c466dcf4cc5340f44948bfa46a9
Reviewed-on: https://go-review.googlesource.com/26765Reviewed-by: Matthew Dempsky <mdempsky@google.com>

example for httptest.Recorder was inspecting Recoder directly.
Using Result() to convert Recorder into a http.Response yields a much
better user experience.

Closes #16837

Change-Id: Id0e636c12cd6adb1ba11f89953ff2b0f43758cf3
Reviewed-on: https://go-review.googlesource.com/27495Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>

CL 27473 accidentally changed `!Debug['I']` to `*flagInterpreter != ""`.
Since the old `Debug['I']` was set when the new *flagInterpreter was
set, this inverted the sense of the condition. The effect was to always
ignore the cgo_dynamic_interpreter setting from runtime/cgo. This worked
OK when the default interpreter was the correct one, but failed when it
was not, as is currently the case on, at least, PPC64 and ARM.

This CL restores the old behavior by using a separate variable to track
whether the -I flag was used, just as we used to.

Change-Id: Icf9b65fa41349ed2e4de477fec0a557ef1eb8189
Reviewed-on: https://go-review.googlesource.com/27562
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

My flags change reversed the meaning of -s within mips64's
linker code. This should fix that.

Change-Id: Ia24002469e557fb29badfd830134e61c1dd7e16e
Reviewed-on: https://go-review.googlesource.com/27555Reviewed-by: Minux Ma <minux@golang.org>

Replace ad-hoc encoding of export version info with a
more systematic approach.

Continue to read (but not write) the Go1.7 format for backward-
compatibility. This will avoid spurious errors with old installed
packages.

Fixes #16244.

Change-Id: I945e79ffd5e22b883250f6f9fac218370c2505a2
Reviewed-on: https://go-review.googlesource.com/27452Reviewed-by: Matthew Dempsky <mdempsky@google.com>

Updates #16795

Change-Id: I0bcc34bb5a92a2c480aebfb0eb6ba57bcc7f7cfd
Reviewed-on: https://go-review.googlesource.com/27551Reviewed-by: Ian Lance Taylor <iant@golang.org>

This adds some additional rules to improve loads and
stores for ppc64x.

Change-Id: I96b99c3a0019e6ac5393910c086f58330a04fc5a
Reviewed-on: https://go-review.googlesource.com/27354
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>

Rather than juggle default and nil cases as part
of a slice, handle them explicitly.

Change-Id: I97b200c9d3f23fe1a438acdbf3d13b0cf7e0851e
Reviewed-on: https://go-review.googlesource.com/26761
TryBot-Result: Gobot Gobot <gobot@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

Fixes #15911.

Change-Id: I500533484de61aa09abe4cecb010445e3176324e
Reviewed-on: https://go-review.googlesource.com/26760
TryBot-Result: Gobot Gobot <gobot@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

Change-Id: Iacedb792c73591b7fd75e836aab8e0e117c8e738
Reviewed-on: https://go-review.googlesource.com/27494
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Found by vet.

Updates #11041

Change-Id: I5217b3e20c6af435d7500d6bb487b9895efe6605
Reviewed-on: https://go-review.googlesource.com/27493
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Updates #11041

Change-Id: I78f8d48f00cfbb451e37c868cc472ef06ea0fd95
Reviewed-on: https://go-review.googlesource.com/27491
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #16641
Updates #11041

Change-Id: I087208a486f535d74135591b2c9a73168cf80e1a
Reviewed-on: https://go-review.googlesource.com/27490
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The old deprecation docs were referencing another deprecated field.

Fixes #16752

Change-Id: I44a690048e00ddc790a80214ecb7f5bb0a5b7b34
Reviewed-on: https://go-review.googlesource.com/27510Reviewed-by: David Crawshaw <crawshaw@golang.org>

Partially addresses #16360

Change-Id: I67a328302d7d91231f348d934e4232fcb844830a
Reviewed-on: https://go-review.googlesource.com/27398Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

The error return from copyValue was ignored causing some XML attribute
parsing to swallow an error.

Additionally, type MyMarshalerAttrTest had no UnmarshalXMLAttr method
causing marshalTests not to be symmetrical and the test suite to fail
for test case 101.

Fixes #16158

Change-Id: Icebc505295a2c656ca4b42ba37bb0957dd7260c6
Reviewed-on: https://go-review.googlesource.com/27455Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

In StartTrace we emit EvGoCreate for all existing goroutines.
This includes stack unwind to obtain current stack.
Real Go programs can contain hundreds of thousands of blocked goroutines.
For such programs StartTrace can take up to a second (few ms per goroutine).

Obtain current stack ID once and use it for all EvGoCreate events.

This speeds up StartTrace with 10K blocked goroutines from 20ms to 4 ms
(win for StartTrace called from net/http/pprof hander will be bigger
as stack is deeper).

Change-Id: I9e5ff9468331a840f8fdcdd56c5018c2cfde61fc
Reviewed-on: https://go-review.googlesource.com/25573
Run-TryBot: Dmitry Vyukov <dvyukov@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>

They are unused, and vet wants them to have
a function prototype.

Updates #11041

Change-Id: Idedc96ddd3c3cf1b1d2ab6d98796367eab29f032
Reviewed-on: https://go-review.googlesource.com/27492
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fib with all int and float types run correctly.
*, /, shifts, Zero, Move not implemented yet. No optimization yet.

Updates #16359.

Change-Id: I4b0412954d5fd4c13a5fcddd8689ed8ac701d345
Reviewed-on: https://go-review.googlesource.com/27404Reviewed-by: David Chase <drchase@google.com>

When compiling with -m -m, this adds output
for every non-inlined function explaining why
it was not inlined.

Change-Id: Icb59ae912a835c996e6b3475b163ee5125113001
Reviewed-on: https://go-review.googlesource.com/22782
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

If a build directive contains multiple arches,
try to match the build context.

Updates #11041

Change-Id: I03b5d7bfb29d1ff6c7d36a9d7c7fabfcc1d871c1
Reviewed-on: https://go-review.googlesource.com/27158
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

Updates #11041

Change-Id: Ic6df8ef25b7cf280db523950cd3640b060ad1a9b
Reviewed-on: https://go-review.googlesource.com/27157
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

bytes.Compare has its go prototype in package bytes,
but its implementation in package runtime.
vet used to complain that the prototype was missing.
Now instead:

runtime/asm_amd64.s:1483: [amd64] cannot check cross-package assembly function: Compare is in package bytes

Updates #11041

Change-Id: Ied44fac10d0916d7a34e552c02d052e16fca0c8c
Reviewed-on: https://go-review.googlesource.com/27153
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

Before:

: runtime/asm_amd64.s:345: [amd64] morestack: use of 8(SP) points beyond argument frame

After:

runtime/asm_amd64.s:345: [amd64] morestack: use of 8(SP) points beyond argument frame

Updates #11041

Change-Id: Ic87a6d1a2a7b2a8bf737407bc981b159825c84f2
Reviewed-on: https://go-review.googlesource.com/27152
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

The asmdecl check had hand-rolled code that
calculated the size and offset of parameters
based only on the AST.
It included a list of known named types.

This CL changes asmdecl to use go/types instead.
This allows us to easily handle named types.
It also adds support for structs, arrays,
and complex parameters.

It improves the default names given to unnamed
parameters. Previously, all anonymous arguments were
called "unnamed", and the first anonymous return
argument was called "ret".
Anonymous arguments are now called arg, arg1, arg2,
etc., depending on the index in the argument list.
Return arguments are ret, ret1, ret2.

This CL also fixes a bug in the printing of
composite data type sizes.

Updates #11041

Change-Id: I1085116a26fe6199480b680eff659eb9ab31769b
Reviewed-on: https://go-review.googlesource.com/27150
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

Eliminate a spill in concatstrings.
Provide bounds elim hints in runetochar.
No significant benchmark movement.

Before:
"".runetochar t=1 size=412 args=0x28 locals=0x0
"".concatstrings t=1 size=736 args=0x30 locals=0x98

After:
"".runetochar t=1 size=337 args=0x28 locals=0x0
"".concatstrings t=1 size=711 args=0x30 locals=0x90

Change-Id: Icce646976cb20a223163b7e72a54761193ac17e3
Reviewed-on: https://go-review.googlesource.com/27460
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Martin Möhrmann <martisch@uos.de>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This moves many of the flag globals into main and assigns them
to their flag.String/Int64/... directly.

Updates #16818

Change-Id: Ibbff44a273bbc5cb7228e43f147900ee8848517f
Reviewed-on: https://go-review.googlesource.com/27473Reviewed-by: David Crawshaw <crawshaw@golang.org>

Go 1.7 crashed after Transport.IdleConnTimeout if an HTTP/2 connection
was established but but its caller no longer wanted it. (Assuming the
connection cache was enabled, which it is by default)

Fixes #16208

Change-Id: I9628757f7669e344f416927c77f00ed3864839e3
Reviewed-on: https://go-review.googlesource.com/27450Reviewed-by: Andrew Gerrand <adg@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

It's always called with the same arguments now.

Maybe the real fix is to make Symbol.Sub a slice but that requires a bit more
brain.

Change-Id: I1326d34a0a327554be6d54f9bd402ea328224766
Reviewed-on: https://go-review.googlesource.com/27416
Run-TryBot: Michael Hudson-Doyle <michael.hudson@canonical.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>

Updates bundled http2 to x/net/http2 git rev 7394c11 for:

http2: fix protocol violation regression when writing certain request bodies
https://golang.org/cl/27406

Fixes #16788

Change-Id: I0efcd36e2b4b34a1df79f763d35bf7a3a1858506
Reviewed-on: https://go-review.googlesource.com/27451
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>

Relevant issues: #5056, #9537, and #11053.
Their tests all pass.

Change-Id: Ibbe05982ed5f332149ffd2cb6a232b8d677c4454
Reviewed-on: https://go-review.googlesource.com/27464
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: I417aae8622d7d363863704594680bd2502a09049
Reviewed-on: https://go-review.googlesource.com/27463
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

We will never inline recursive calls.
Rather than simulate the recursion until we hit
the complexity ceiling, just bail early.

Also, remove a pointless n.Op check.
visitBottomUp guarantees that n will be an
ODCLFUNC, and caninl double-checks it.

Change-Id: Ifa48331686b24289d34e68cf5bef385f464b6b92
Reviewed-on: https://go-review.googlesource.com/27462
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Their only purpose in life was to suppress an error.
Suppress that error explicitly instead by reusing
an existing, aptly named Node field.

This generates fewer blocks during ssa construction.

name       old alloc/op     new alloc/op     delta
Template       47.5MB ± 0%      47.2MB ± 0%  -0.72%        (p=0.000 n=15+15)
Unicode        36.8MB ± 0%      36.8MB ± 0%    ~           (p=0.775 n=15+15)
GoTypes         143MB ± 0%       142MB ± 0%  -1.03%        (p=0.000 n=15+14)
Compiler        686MB ± 0%       674MB ± 0%  -1.75%        (p=0.000 n=15+15)

name       old allocs/op    new allocs/op    delta
Template         446k ± 0%        445k ± 0%  -0.20%        (p=0.000 n=15+15)
Unicode          355k ± 0%        355k ± 0%    ~           (p=0.235 n=13+15)
GoTypes         1.36M ± 0%       1.36M ± 0%  -0.41%        (p=0.000 n=13+15)
Compiler        5.77M ± 0%       5.70M ± 0%  -1.16%        (p=0.000 n=15+15)


Change-Id: I5f14afb833c9d355688d9a229eb820e95c7657bf
Reviewed-on: https://go-review.googlesource.com/27461
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

The only thing pobj contains is the Ldmain function.

Updates #16818

Change-Id: Id114bdb264cb5ea2f372eb2166201f1f8eb99445
Reviewed-on: https://go-review.googlesource.com/27472
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The obj library's flag functions are (mostly) light wrappers
around the standard library flag package. Use the flag package
directly where possible.

Most uses of the 'count'-type flags (except for -v) only check
against 0, so they can safely be replaced by bools. Only -v
and the flagfns haven't been replaced.

Debug has been turned into a slice of bools rather than ints.
There was a copy of the -v verbosity in ctxt.Debugvlog, so don't use
Debug['v'] and just use ctxt.Debugvlog.

Updates #16818

Change-Id: Icf6473a4823c9d35513bbd0c34ea02d5676d782a
Reviewed-on: https://go-review.googlesource.com/27471
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

cmd/link/link_test.go contains several multi-line
struct tags. Going through an unquote/quote cycle
converts `a
b
c` to "a\nb\nc\n".

This keeps all vet error messages for the standard
library on a single line.

Updates #11041

Change-Id: Ifba1e87297a5174294d1fbf73463fd3db357464f
Reviewed-on: https://go-review.googlesource.com/27129
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
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Reviewed-by: Rob Pike <r@golang.org>

Eliminates the following false positive:

cmd/go/go_test.go:1916: possible formatting directive in Error call

The line in question:

tg.t.Error("some coverage results are 0.0%")

Updates #11041

Change-Id: I3b7611fa3e0245714a19bd5388f21e39944f5296
Reviewed-on: https://go-review.googlesource.com/27128
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>