delta/go-git.git/src/cmd/compile/internal/gc/noder.go, branch dev.inline

[dev.inline] cmd/compile: parse source files concurrently

2017-01-13T23:07:14+00:00

Conversion to Nodes still happens sequentially at the moment.

Change-Id: I3407ba0711b8b92e22ece0a06fefaff863c3ccc9
Reviewed-on: https://go-review.googlesource.com/35126
Run-TryBot: Matthew Dempsky 
Reviewed-by: Robert Griesemer 
TryBot-Result: Gobot Gobot

[dev.inline] cmd/compile: reorganize file parsing logic

2017-01-13T23:06:31+00:00

Preparation for concurrent parsing. No behavior change.

Change-Id: Ic1ec45fc3cb316778c29065cf055c82e92ffa874
Reviewed-on: https://go-review.googlesource.com/35125
Reviewed-by: Robert Griesemer 
Run-TryBot: Matthew Dempsky 
TryBot-Result: Gobot Gobot

[dev.inline] cmd/compile: split mkpackage into separate functions

2017-01-13T23:06:22+00:00

Previously, mkpackage jumbled together three unrelated tasks: handling
package declarations, clearing imports from processing previous source
files, and assigning a default value to outfile.

Change-Id: I1e124335768aeabfd1a6d9cc2499fbb980d951cf
Reviewed-on: https://go-review.googlesource.com/35124
Reviewed-by: Robert Griesemer 
Run-TryBot: Matthew Dempsky 
TryBot-Result: Gobot Gobot

[dev.inline] cmd/internal/src: introduce compact source position representation

2017-01-09T22:43:22+00:00

XPos is a compact (8 instead of 16 bytes on a 64bit machine) source
position representation. There is a 1:1 correspondence between each
XPos and each regular Pos, translated via a global table.

In some sense this brings back the LineHist, though positions can
track line and column information; there is a O(1) translation
between the representations (no binary search), and the translation
is factored out.

The size increase with the prior change is brought down again and
the compiler speed is in line with the master repo (measured on
the same "quiet" machine as for prior change):

name       old time/op     new time/op     delta
Template       256ms ± 1%      262ms ± 2%    ~             (p=0.063 n=5+4)
Unicode        132ms ± 1%      135ms ± 2%    ~             (p=0.063 n=5+4)
GoTypes        891ms ± 1%      871ms ± 1%  -2.28%          (p=0.016 n=5+4)
Compiler       3.84s ± 2%      3.89s ± 2%    ~             (p=0.413 n=5+4)
MakeBash       47.1s ± 1%      46.2s ± 2%    ~             (p=0.095 n=5+5)

name       old user-ns/op  new user-ns/op  delta
Template        309M ± 1%       314M ± 2%    ~             (p=0.111 n=5+4)
Unicode         165M ± 1%       172M ± 9%    ~             (p=0.151 n=5+5)
GoTypes        1.14G ± 2%      1.12G ± 1%    ~             (p=0.063 n=5+4)
Compiler       5.00G ± 1%      4.96G ± 1%    ~             (p=0.286 n=5+4)

Change-Id: Icc570cc60ab014d8d9af6976f1f961ab8828cc47
Reviewed-on: https://go-review.googlesource.com/34506
Run-TryBot: Robert Griesemer 
Reviewed-by: Matthew Dempsky 
Reviewed-by: Austin Clements 
TryBot-Result: Gobot Gobot

[dev.inline] cmd/internal/src: replace src.Pos with syntax.Pos

2017-01-09T22:33:23+00:00

This replaces the src.Pos LineHist-based position tracking with
the syntax.Pos implementation and updates all uses.

The LineHist table is not used anymore - the respective code is still
there but should be removed eventually. CL forthcoming.

Passes toolstash -cmp when comparing to the master repo (with the
exception of a couple of swapped assembly instructions, likely due
to different instruction scheduling because the line-based sorting
has changed; though this is won't affect correctness).

The sizes of various important compiler data structures have increased
significantly (see the various sizes_test.go files); this is probably
the reason for an increase of compilation times (to be addressed). Here
are the results of compilebench -count 5, run on a "quiet" machine (no
apps running besides a terminal):

name       old time/op     new time/op     delta
Template       256ms ± 1%      280ms ±15%  +9.54%          (p=0.008 n=5+5)
Unicode        132ms ± 1%      132ms ± 1%    ~             (p=0.690 n=5+5)
GoTypes        891ms ± 1%      917ms ± 2%  +2.88%          (p=0.008 n=5+5)
Compiler       3.84s ± 2%      3.99s ± 2%  +3.95%          (p=0.016 n=5+5)
MakeBash       47.1s ± 1%      47.2s ± 2%    ~             (p=0.841 n=5+5)

name       old user-ns/op  new user-ns/op  delta
Template        309M ± 1%       326M ± 2%  +5.18%          (p=0.008 n=5+5)
Unicode         165M ± 1%       168M ± 4%    ~             (p=0.421 n=5+5)
GoTypes        1.14G ± 2%      1.18G ± 1%  +3.47%          (p=0.008 n=5+5)
Compiler       5.00G ± 1%      5.16G ± 1%  +3.12%          (p=0.008 n=5+5)

Change-Id: I241c4246cdff627d7ecb95cac23060b38f9775ec
Reviewed-on: https://go-review.googlesource.com/34273
Run-TryBot: Robert Griesemer 
TryBot-Result: Gobot Gobot 
Reviewed-by: Matthew Dempsky

[dev.inline] cmd/compile/internal/syntax: use syntax.Pos for all external positions

2016-12-09T01:35:14+00:00

- use syntax.Pos in syntax.Error (rather than line, col)
- use syntax.Pos in syntax.PragmaHandler (rather than just line)
- update uses
- better documentation in various places

Also:
- make Pos methods use Pos receiver (rather than *Pos)

Reviewed in and cherry-picked from https://go-review.googlesource.com/#/c/33891/.
With minor adjustments to noder.go to make merge compile.

Change-Id: I5507cea6c2be46a7677087c1aeb69382d31033eb
Reviewed-on: https://go-review.googlesource.com/34236
Reviewed-by: Matthew Dempsky

[dev.inline] cmd/compile/internal/syntax: process //line pragmas in scanner

2016-12-09T00:43:04+00:00

Reviewed in and cherry-picked from https://go-review.googlesource.com/#/c/33764/.

Minor adjustment in noder.go to make merge compile again.

Change-Id: Ib5029b52b59944f207b0f2438c8a5aa576eb25b8
Reviewed-on: https://go-review.googlesource.com/34233
Run-TryBot: Robert Griesemer 
Reviewed-by: Matthew Dempsky 
TryBot-Result: Gobot Gobot

[dev.inline] cmd/compile/internal/syntax: introduce general position info for nodes

2016-12-09T00:42:42+00:00

Reviewed in and cherry-picked from https://go-review.googlesource.com/#/c/33758/.
Minor adjustments in noder.go to fix merge.

Change-Id: Ibe429e327c7f8554f8ac205c61ce3738013aed98
Reviewed-on: https://go-review.googlesource.com/34231
Reviewed-by: Matthew Dempsky

[dev.inline] cmd/compile: rename various fields from Lineno to Pos

2016-12-08T21:35:18+00:00

Various minor adjustments.

Change-Id: Iedfb97989f7bedaa3e9e8993b167e05f162434a7
Reviewed-on: https://go-review.googlesource.com/34136
Reviewed-by: David Lazar

[dev.inline] cmd/internal/src: make Pos implementation abstract

2016-12-08T21:31:28+00:00

Adjust cmd/compile accordingly.

This will make it easier to replace the underlying implementation.

Change-Id: I33645850bb18c839b24785b6222a9e028617addb
Reviewed-on: https://go-review.googlesource.com/34133
Reviewed-by: David Lazar