Change-Id: If2a174f482ecd56dee43f921d13fef98439872fc
Reviewed-on: https://go-review.googlesource.com/20559Reviewed-by: Matthew Dempsky <mdempsky@google.com>

Change-Id: Ia2273c3a9f0001d16b0c767fea91498a9acb0af5
Reviewed-on: https://go-review.googlesource.com/19963Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Use idiomatic slicing operations instead of incrementally building a
linked list.

Passes toolstash -cmp.

Change-Id: Idb0e40c7b4d7d1110d23828afa8ae1d157ba905f
Reviewed-on: https://go-review.googlesource.com/20556Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

In particular, make Alignof work more like Sizeof. Other idiomatic
cleanups while here.

Passes toolstash -cmp.

Change-Id: I4def20894f3d95e49ab6a50ddba189be36fdd258
Reviewed-on: https://go-review.googlesource.com/20555
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

This could be done by threading the Iter value down through memrun and
ispaddedfield, but that ends up a bit clunky. This way is also closer
to how we'll want the code to look once fields are kept in slices.

Passes toolstash -cmp.

Change-Id: I8a44445c85f921eb18d97199df2026c5ce0f4f67
Reviewed-on: https://go-review.googlesource.com/20558
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

x86 has a lot of instructions that require the output to be in the same
register as one of the inputs.  When allocating the output register,
allocate the same register as the input if it is available.

Improves the performance of golang.org/x/crypto/sha3 by
10% (from 6% slower than 1.6 to 4% faster).

Fixes #14745

Change-Id: I4d81785240c9368e4dc75107b45c959d200df8e6
Reviewed-on: https://go-review.googlesource.com/20488Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

Not calling popdcl doesn't have an impact on generated code but
the result is a growing (rather than empty) stack of symbols,
possibly causing more data to remain alive than necessary.

Also: minor cleanups.

Change-Id: Ic4fdbcd8843637d69ab1aa15e896a7e6339bc990
Reviewed-on: https://go-review.googlesource.com/20554Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Robert Griesemer <gri@golang.org>

Use a map to detect duplicate symbols. Allows eliminating an otherwise
unneeded field from Sym and gets rid of a global variable.

Change-Id: Ic004bca7e9130a1261a1cddbc17244529a2a1df4
Reviewed-on: https://go-review.googlesource.com/20552Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>

Change the existing flags from compile time consts to be configurable
from the command line.

Change-Id: I4aab4bf3dfcbdd8e2b5a2ff51af95c2543967769
Reviewed-on: https://go-review.googlesource.com/20560Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Todd Neal <todd@tneal.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

The location of VARDEFs is incorrect for PPARAMOUT variables
which are also used as temporary locations.  We put in VARDEFs
when setting the variable at return time, but when the location
is also used as a temporary the lifetime values are wrong.

Fix copyelim to update the names map properly.  This is a
real name bug fix which, as a result, allows me to
write a reasonable test to trigger the PPARAMOUT bug.

This is kind of a band-aid fix for #14591.  A more pricipled
fix (which allows values to be stored in the return variable
earlier than the return point) will be harder.

Fixes #14591

Change-Id: I7df8ae103a982d1f218ed704c080d7b83cdcfdd9
Reviewed-on: https://go-review.googlesource.com/20457Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

Fixes #14759.

Change-Id: I6cef0b49ba00ab85b25ce1e7bad80ad85e2d5076
Reviewed-on: https://go-review.googlesource.com/20545
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Michael Hudson-Doyle <michael.hudson@canonical.com>

PKIX versions are off-by-one, so v1 is actually a zero on the wire, v2
is a one, and so on.

The RFC says that the version in a CRL is optional, but doesn't say what
the default is. Since v2 is the only accepted version, I had made the
default v2. However, OpenSSL considers the default to be v1. Also, if
the default is v2 and the element is optional then we'll never actually
write v2 on the wire. That's contrary to the RFC which clearly assumes
that v2 will be expressed on the wire in some cases.

Therefore, this change aligns with OpenSSL and assumes that v1 is the
default CRL version.

Fixes #13931

[1] https://tools.ietf.org/html/rfc5280#section-5.1

Change-Id: Ic0f638ebdd21981d92a99a882affebf3a77ab71a
Reviewed-on: https://go-review.googlesource.com/20544Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The default version of an X.509 certificate is v1, which is encoded on
the wire as a zero.

Fixes #13382.

Change-Id: I5fd725c3fc8b08fd978ab694a3e2d6d2a495918b
Reviewed-on: https://go-review.googlesource.com/20548Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Allows safely eliminating more direct uses of Type's Type and Down
fields.

Passes toolstash -cmp.

Change-Id: I5c17fe541a0473c3cd2978d8314c4ab759079a61
Reviewed-on: https://go-review.googlesource.com/20541
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

I would like to add a

    func (t *Type) Elem() *Type

method to package gc, but that would collide with the existing

    func (t *Type) Elem() ssa.Type

method needed to make *gc.Type implement ssa.Type.  Because the latter
is much less widely used right now than the former will be, this CL
renames it to ElemType.

Longer term, hopefully gc and ssa will share a common Type interface,
and ElemType can go away.

Change-Id: I270008515dc4c01ef531cf715637a924659c4735
Reviewed-on: https://go-review.googlesource.com/20546
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

Eliminate "else_clause" parameter and move error messages about bad if
statements into the if_stmt parsing method.

Passes toolstash -cmp.

Change-Id: Ibc31619bdb2e7e0cf28712b14640f7d9b6124a40
Reviewed-on: https://go-review.googlesource.com/20543
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>

Change-Id: I06dedf4ebfa32b598f5545dc9354c8e4a95610b1
Reviewed-on: https://go-review.googlesource.com/20525
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #14741.

Change-Id: Idb8de8b0c1059c15e4c3df4a60bbd340d4e74aba
Reviewed-on: https://go-review.googlesource.com/20487Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>

Make sure we do any just-before-return cleanup on all paths out of a
function, including when recovering.  Each exit path should include
deferreturn (if there are any defers) and then the exit
code (e.g. copying heap-escaping return values back to the stack).

Introduce a Defer SSA block type which has two outgoing edges - one the
fallthrough edge (the defer was queued successfully) and one which
immediately returns (the defer had a successful recover() call and
normal execution should resume at the return point).

Fixes #14725

Change-Id: Iad035c9fd25ef8b7a74dafbd7461cf04833d981f
Reviewed-on: https://go-review.googlesource.com/20486Reviewed-by: David Chase <drchase@google.com>

Passes toolstash -cmp.

Change-Id: I014613985005780d1a622c1981b35a94cda798bb
Reviewed-on: https://go-review.googlesource.com/20530
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: I055e986c3f27d5c07badcd1684f4fe1d65a917a9
Reviewed-on: https://go-review.googlesource.com/20523
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This CL was mostly produced by a one-off automated rewrite tool
looking for statements like "for X := T.Type; X != nil; X = X.Down"
and a few minor variations.

Passes toolstash -cmp.

Change-Id: Ib22705e37d078ef97841ee2e08f60bdbcabb94ad
Reviewed-on: https://go-review.googlesource.com/20520
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Passes toolstash -cmp.

Change-Id: I05322fb5afd213f13fb247ec1a5f655c17a58774
Reviewed-on: https://go-review.googlesource.com/20522
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

That was easy.

Fixes #14473.

Change-Id: I9d1d20a5c5a9b1423e6c72c0460ee4a78130864f
Reviewed-on: https://go-review.googlesource.com/20521
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Fixes #14554.

Change-Id: I37ab4e4dc1aee84ac448d437314f8eecbbc02994
Reviewed-on: https://go-review.googlesource.com/20021Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Passes toolstash -cmp.

Update #14473.

Change-Id: I2ac5c595d7af7a8da1a7e3945e6a753299446250
Reviewed-on: https://go-review.googlesource.com/20497
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

If the upstream writer has returned an error, it may not
be returned by subsequent calls.

This makes sure that if an error has been returned, the
Writer will keep returning an error on all subsequent calls,
and not silently "swallow" them.

Change-Id: I2c9f614df72e1f4786705bf94e119b66c62abe5e
Reviewed-on: https://go-review.googlesource.com/20515Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>

The fmt package does not use bytes.Buffer
anymore as an internal buffer.

Change-Id: I34c7a52506290ccbcb10ea2e85dea49a0a8b8203
Reviewed-on: https://go-review.googlesource.com/20511Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This allows TestDialerFallbackDelay to pass again on machines where IPv6
connections to nowhere fail quickly instead of hanging.

This bug appeared last month, when I deleted the slowTimeout constant.

Updates #11225
Fixes #14731

Change-Id: I840011eee571aab1041022411541736111c7fad5
Reviewed-on: https://go-review.googlesource.com/20493
Run-TryBot: Paul Marks <pmarks@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Mikio Hara <mikioh.mikioh@gmail.com>

The existing implementation uses code written in Go to
implement Sqrt; this adds the assembler to use the sqrt
instruction for Power and makes the necessary changes to
allow it to be inlined.

The following tests showed this relative improvement:

benchmark                 delta
BenchmarkSqrt             -97.91%
BenchmarkSqrtIndirect     -96.65%
BenchmarkSqrtGo           -35.93%
BenchmarkSqrtPrime        -96.94%

Fixes #14349

Change-Id: I8074f4dc63486e756587564ceb320aca300bf5fa
Reviewed-on: https://go-review.googlesource.com/19515Reviewed-by: Minux Ma <minux@golang.org>

When calling freeValue for possible const values, remove them from the
cache as well.

Change-Id: I087ed592243e33c58e5db41700ab266fc70196d9
Reviewed-on: https://go-review.googlesource.com/20481
Run-TryBot: Todd Neal <tolchz@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

More cleanups after CL 20089

- copysub, take a bool rather than an int for the f (force) parameter.
- copysub returns a bool rather than an int.
- prevl, reg is now int16, which reduces type conversion in its callers.
- copy1, reduce the scope of t and p variables.
- small simplifications in copyau1, copyas, etc.
- {mips64,ppc64}/regzer returns a bool.
- apply CL 20181 to x86/peep.go which was missed in the last CL.
- various comment fixes.

Change-Id: Ib73ffb768c979ce86f1614e5366fd576dea50986
Reviewed-on: https://go-review.googlesource.com/20281Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: I93b4821254c9b0a3cebd912f447ed58f20adeb58
Reviewed-on: https://go-review.googlesource.com/19937Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #13337.

Change-Id: Ie74d00390111796619150287d3f7a147750ab456
Reviewed-on: https://go-review.googlesource.com/19932Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: Ice3aa807169f4fec85745a3991b1084a9f85c1b5
Reviewed-on: https://go-review.googlesource.com/20499
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Accessing the n'th field of a struct is fairly common, and in
particular accessing the 0'th field of the receiver parameter list is
very common. Add helper methods for both of these tasks and update
code to make use of them.

Change-Id: I81f551fecdca306b3800636caebcd0dc106f2ed7
Reviewed-on: https://go-review.googlesource.com/20498
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Dave Cheney <dave@cheney.net>

Also, more lazy variable declarations, and make Dijkstra happy by
replacing "goto loop" with a for loop.

Change-Id: Idf2cd779a92eb3f33bd3394e12c9a0be72002ff4
Reviewed-on: https://go-review.googlesource.com/20496Reviewed-by: Dave Cheney <dave@cheney.net>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Follow up to CL 20494 addressing Type.Copy and a few other tiny
cleanups.

Change-Id: I3d0913a9f50a22ac2fd802858b1a94c15c5cb1bc
Reviewed-on: https://go-review.googlesource.com/20501
Run-TryBot: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

Better documentation. Change parameter types from **Type and int to
just *Type and bool. Make use of short var declarations.

Change-Id: I909846ba0df65cd2bc05ee145b72d60e881588bd
Reviewed-on: https://go-review.googlesource.com/20495Reviewed-by: Dave Cheney <dave@cheney.net>

This should is preparatory cleanup to make it easier to use separate
types to represent each kind of Go type, rather than a single omnibus
Type struct with heavily overloaded fields.

Also, add TODO comments marking assignments that change an existing
Type's kind, as they need to be removed before we can factor Type.

Change-Id: If4b551fdea4ae045b10b1a3de2ee98f5cf32a517
Reviewed-on: https://go-review.googlesource.com/20494Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>