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Commit Graph

6000 Commits

Author SHA1 Message Date
Brad Fitzpatrick
a13cf8c104 cmd/internal/obj: manual C->Go cleanups
Change-Id: I5964fc55157dc1df7be400dfa0df591d6163e25e
Reviewed-on: https://go-review.googlesource.com/9084
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
2015-04-20 16:54:22 +00:00
David Crawshaw
3f4de49d0a cmd/dist: enable c-archive test on darwin/arm64
Turns out all the necessary pieces have already been submitted.

Change-Id: I19c8d614cd756821ce400ca7a338029002780b18
Reviewed-on: https://go-review.googlesource.com/9076
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
2015-04-20 15:56:56 +00:00
David Crawshaw
98f610fe09 misc/cgo/testcarchive: enable test on darwin/arm
Change-Id: I0d3f9841500e0a41f1c427244869bf3736a31e18
Reviewed-on: https://go-review.googlesource.com/9075
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
2015-04-20 15:16:16 +00:00
Hyang-Ah Hana Kim
983a490ee9 cmd/dist: include misc/cgo/testcshared test for linux/amd64
Change-Id: Ia2c0c617df523482ba1a25b7492267eb80f0819a
Reviewed-on: https://go-review.googlesource.com/9033
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-04-20 02:27:43 +00:00
Michael Hudson-Doyle
b92a0a8969 cmd/internal/gc, cmd/go: fix value of importpath symbol
In https://golang.org/cl/7797 I attempted to use myimportpath to set the value
of the go.importpath.$foo. symbol for the module being compiled, but I messed
it up and only set the name (which the linker rewrites anyway). This lead to
the importpath for the module being compiled being "". This was hard to notice,
because all modules that import another define the importpath for their
imported modules correctly -- but main is not imported, and this meant that the
reflect module saw all fields of all types defined in the main module as
exported.

The fix is to do what I meant to do the first time, add a test and change the
go tool to compile main packages with -p main and not -p
command-line-arguments.

Fixes #10332

Change-Id: I5fc6e9b1dc2b26f058641e382f9a56a526eca291
Reviewed-on: https://go-review.googlesource.com/8481
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-19 20:14:59 +00:00
Josh Bleecher Snyder
951f74c4d0 cmd/...: fix vet issues and cull dead code
Change-Id: Ied0eab872950793b34dd2268055b29c702b07e99
Reviewed-on: https://go-review.googlesource.com/9081
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
2015-04-18 01:47:28 +00:00
Matthew Dempsky
93402383ea cmd/cgo: more robust detection of clang
Fixes #10453.

Change-Id: I77470279865d4c954df615d6594c69edf68c28ca
Reviewed-on: https://go-review.googlesource.com/9090
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-18 01:11:44 +00:00
Brad Fitzpatrick
05efc18c20 cmd/6g, etc: cleanup, moving code out of near-empty gg.go files
Clear out gg.go files, and move things into consistent places between
the cmd/?g directories.

Change-Id: I81e04180613b806e0bfbb88519e66111ce9f74a3
Reviewed-on: https://go-review.googlesource.com/9080
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-18 00:11:23 +00:00
David Crawshaw
7816a096d9 cmd/internal/ld: replace Diag;Errorexit with Exitf
I have left the Diag calls in place where I believe Ctxt.Cursym != nil
which means this CL is not the improvement I had hoped for. However
it is now safe to call Exitf whereever you are in the linker, which
makes it easier to reason about some code.

Change-Id: I8261e761ca9719f7d216e2747314adfe464e3337
Reviewed-on: https://go-review.googlesource.com/8668
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-17 22:50:25 +00:00
Rob Pike
9c3bf097c8 cmd/go: add $GOLINE to generate
Also use os.Expand for variable substitution so ${x}y works.

Fixes #9960.

Change-Id: Ic8239b2e737d1f41910dde8ee9524ac48907cb03
Reviewed-on: https://go-review.googlesource.com/9007
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-17 20:33:01 +00:00
Josh Bleecher Snyder
13cb62c764 cmd/internal/gc, cmd/6g: generate boolean values without jumps
Use SETcc instructions instead of Jcc to generate boolean values.
This generates shorter, jump-free code, which may in turn enable other
peephole optimizations.

For example, given

func f(i, j int) bool {
	return i == j
}

Before

"".f t=1 size=32 value=0 args=0x18 locals=0x0
	0x0000 00000 (x.go:3)	TEXT	"".f(SB), $0-24
	0x0000 00000 (x.go:3)	FUNCDATA	$0, gclocals·b4c25e9b09fd0cf9bb429dcefe91c353(SB)
	0x0000 00000 (x.go:3)	FUNCDATA	$1, gclocals·33cdeccccebe80329f1fdbee7f5874cb(SB)
	0x0000 00000 (x.go:4)	MOVQ	"".i+8(FP), BX
	0x0005 00005 (x.go:4)	MOVQ	"".j+16(FP), BP
	0x000a 00010 (x.go:4)	CMPQ	BX, BP
	0x000d 00013 (x.go:4)	JEQ	21
	0x000f 00015 (x.go:4)	MOVB	$0, "".~r2+24(FP)
	0x0014 00020 (x.go:4)	RET
	0x0015 00021 (x.go:4)	MOVB	$1, "".~r2+24(FP)
	0x001a 00026 (x.go:4)	JMP	20

After

"".f t=1 size=32 value=0 args=0x18 locals=0x0
	0x0000 00000 (x.go:3)	TEXT	"".f(SB), $0-24
	0x0000 00000 (x.go:3)	FUNCDATA	$0, gclocals·b4c25e9b09fd0cf9bb429dcefe91c353(SB)
	0x0000 00000 (x.go:3)	FUNCDATA	$1, gclocals·33cdeccccebe80329f1fdbee7f5874cb(SB)
	0x0000 00000 (x.go:4)	MOVQ	"".i+8(FP), BX
	0x0005 00005 (x.go:4)	MOVQ	"".j+16(FP), BP
	0x000a 00010 (x.go:4)	CMPQ	BX, BP
	0x000d 00013 (x.go:4)	SETEQ	"".~r2+24(FP)
	0x0012 00018 (x.go:4)	RET

regexp benchmarks, best of 12 runs:

benchmark                                 old ns/op      new ns/op      delta
BenchmarkNotOnePassShortB                 782            733            -6.27%
BenchmarkLiteral                          180            171            -5.00%
BenchmarkNotLiteral                       2855           2721           -4.69%
BenchmarkMatchHard_32                     2672           2557           -4.30%
BenchmarkMatchHard_1K                     80182          76732          -4.30%
BenchmarkMatchEasy1_32M                   76440180       73304748       -4.10%
BenchmarkMatchEasy1_32K                   68798          66350          -3.56%
BenchmarkAnchoredLongMatch                482            465            -3.53%
BenchmarkMatchEasy1_1M                    2373042        2292692        -3.39%
BenchmarkReplaceAll                       2776           2690           -3.10%
BenchmarkNotOnePassShortA                 1397           1360           -2.65%
BenchmarkMatchClass_InRange               3842           3742           -2.60%
BenchmarkMatchEasy0_32                    125            122            -2.40%
BenchmarkMatchEasy0_32K                   11414          11164          -2.19%
BenchmarkMatchEasy0_1K                    668            654            -2.10%
BenchmarkAnchoredShortMatch               260            255            -1.92%
BenchmarkAnchoredLiteralShortNonMatch     164            161            -1.83%
BenchmarkOnePassShortB                    623            612            -1.77%
BenchmarkOnePassShortA                    801            788            -1.62%
BenchmarkMatchClass                       4094           4033           -1.49%
BenchmarkMatchEasy0_32M                   14078800       13890704       -1.34%
BenchmarkMatchHard_32K                    4095844        4045820        -1.22%
BenchmarkMatchEasy1_1K                    1663           1643           -1.20%
BenchmarkMatchHard_1M                     131261708      129708215      -1.18%
BenchmarkMatchHard_32M                    4210112412     4169292003     -0.97%
BenchmarkMatchMedium_32K                  2460752        2438611        -0.90%
BenchmarkMatchEasy0_1M                    422914         419672         -0.77%
BenchmarkMatchMedium_1M                   78581121       78040160       -0.69%
BenchmarkMatchMedium_32M                  2515287278     2498464906     -0.67%
BenchmarkMatchMedium_32                   1754           1746           -0.46%
BenchmarkMatchMedium_1K                   52105          52106          +0.00%
BenchmarkAnchoredLiteralLongNonMatch      185            185            +0.00%
BenchmarkMatchEasy1_32                    107            107            +0.00%
BenchmarkOnePassLongNotPrefix             505            505            +0.00%
BenchmarkOnePassLongPrefix                147            147            +0.00%

The godoc binary is ~0.12% smaller after this CL.

Updates #5729.

toolstash -cmp passes for all architectures other than amd64 and amd64p32.

Other architectures can be done in follow-up CLs.

Change-Id: I0e167e259274b722958567fc0af83a17ca002da7
Reviewed-on: https://go-review.googlesource.com/2284
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-17 20:12:18 +00:00
Ian Lance Taylor
9c1868d06d runtime: add -buildmode=c-archive/c-shared support for linux/386
Change-Id: I87147ca6bb53e3121cc4245449c519509f107638
Reviewed-on: https://go-review.googlesource.com/9009
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-04-17 19:31:37 +00:00
Russ Cox
17228f44b2 cmd/internal/gc: make use of new String methods in prints
$ sam -d cmd/internal/gc/*.{go,y} cmd/?g/*.go
X ,s/, (gc\.)?[BFHNST]conv\(([^()]+), 0\)/, \2/g
X/'/w
q
$

Change-Id: Ic28a4807d237b8ae53ceca1e4e7fdb43580ab560
Reviewed-on: https://go-review.googlesource.com/9032
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2015-04-17 19:29:25 +00:00
Russ Cox
96c91fa9db cmd/internal/gc: add String methods to *Mpint, *Mpflt, *Node, *NodeList, *Sym, *Type
The next CL will remove unnecessary conv calls.

Change-Id: I0e8dbd1756cdec1ef6095ae67629cd3fae0fb4a4
Reviewed-on: https://go-review.googlesource.com/9031
Reviewed-by: Austin Clements <austin@google.com>
2015-04-17 19:29:15 +00:00
Ian Lance Taylor
449969a4ac cmd/internal/ld, cmd/dist: support -buildmode=c-archive on linux
Change-Id: I8c97751a79b57197428b0f0b66fc9575708a2eb0
Reviewed-on: https://go-review.googlesource.com/8979
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-04-17 18:35:53 +00:00
Rob Pike
2807572ab0 cmd/go: implement the long-promised -run flag for go generate
Trivial to do, but overlooked for 1.4, which is good because I prefer
the new design, which is just to match against the source code of
the line rather than the command word alone.

Change-Id: Idcf7c4479e97bb7cd732f0d058012321b6057628
Reviewed-on: https://go-review.googlesource.com/9005
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-17 17:49:14 +00:00
Brad Fitzpatrick
27067df9db cmd/internal/obj: cleanups from C transition and delete dead code
Change-Id: Id1ecad2565edd5937a764dcf56b89263353f47c2
Reviewed-on: https://go-review.googlesource.com/8947
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-17 17:28:17 +00:00
Russ Cox
a5e48cf023 cmd/internal/gc: fix node print
Change-Id: I0d2b909ceeba9da86c77de4ce23d7c6063f8f10f
Reviewed-on: https://go-review.googlesource.com/9017
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-17 14:57:51 +00:00
Josh Bleecher Snyder
4a7e5bca3c cmd/internal/gc: clean up bgen
This cleanup is in anticipation of implementing
jump-free booleans (CL 2284) and zero-aware
comparisons (issue 10381).

No functional changes. Passes toolstash -cmp.

Change-Id: I50f394c60fa2927e177d7fc85b75085060a9e912
Reviewed-on: https://go-review.googlesource.com/8738
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-17 03:25:21 +00:00
David Crawshaw
46b4f675bf cmd/internal/ld: use usual flooding for c-archive
I said I removed this from cl/8711 in response to your comment, but
apparently I did not.

misc/cgo/testcarchive continues to pass on darwin/amd64.

Change-Id: I6410782f2a78bf117741628fb71cac56e289b590
Reviewed-on: https://go-review.googlesource.com/9010
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-16 20:01:13 +00:00
Michael Hudson-Doyle
62353ff876 cmd/go: have go run, go list respect -buildmode/-linkshared
Change-Id: I749fd91cd3c7581cdcc97a15e8eeee0c20f0b259
Reviewed-on: https://go-review.googlesource.com/8805
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
2015-04-16 19:25:32 +00:00
Michael Hudson-Doyle
2f0828ef7c reflect, cmd/internal/gc: look for pointer types by string before synthesizing
The ptrto field of the type data cannot be relied on when dynamic linking: a
type T may be defined in a module that makes no use of pointers to that type,
but another module can contain a package that imports the first one and does use
*T pointers.  The second module will end up defining type data for *T and a
type.*T symbol pointing at it. It's important that calling .PtrTo() on the
refect.Type for T returns this type data and not some synthesized object, so we
need reflect to be able to find it!

Fortunately, the reflect package already has a mechanism for doing this sort of
thing: ChanOf/MapOf/etc look for pre-existing type data by name.  So this change
just extends PtrTo() to consult this too, and changes the compiler to include
pointer types in the data consulted when compiling for dynamic linking.

Change-Id: I3773c066fd0679a62e9fc52a84bf64f1d67662b7
Reviewed-on: https://go-review.googlesource.com/8232
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
2015-04-16 16:11:07 +00:00
Josh Bleecher Snyder
e040fd4654 cmd/internal/gc: registerize more in 7g and 9g
7g and 9g disagree with componentgen
about what type len and cap have.

This results in an etype mismatch,
which inhibits registerization.

Fixing this results in 7406 more registerizations
while building the stdlib.
There are still 1512 missed opportunities.

This should improve the performance benefit
to 7g of enabling componentgen (CL 8636).

This CL reduces the size of godoc by 203k (-1.177%).

This was discovered by using the diagnostics
added in CL 8732 and running:

GOARCH=arm64 GOOS=linux go build -gcflags="-d registerization" std

See CL 91850043 for similar earlier fixes for 6g and 8g.

Change-Id: I57f478228a000ad7529d4136bad94a51343c4daa
Reviewed-on: https://go-review.googlesource.com/8733
Reviewed-by: Dave Cheney <dave@cheney.net>
Reviewed-by: Keith Randall <khr@golang.org>
2015-04-16 15:50:37 +00:00
Aram Hăvărneanu
8262a8fbef cmd/7g: change CHECKNIL sequence
We can use CBNZ instruction and make it one instruction shorter.

Saves 66kB in godoc.

Change-Id: Ie71fe7cf31e7f73644ee926f4f9624c009c3eb1a
Reviewed-on: https://go-review.googlesource.com/8634
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-16 13:31:16 +00:00
Aram Hăvărneanu
a6bade60b0 cmd/7g: remove loads that only load an immediate to be later used by ADD/SUB
Optimize the sequence:
	MOV $imm, Rt
	ADD Rt, Rs, Rd

into:
	ADD $imm, Rs, Rd

Saves 66k in godoc.

Change-Id: I27b4aaa0ec80a59472fe2e5816efdf3db9c901ee
Reviewed-on: https://go-review.googlesource.com/8632
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-16 13:31:02 +00:00
Shenghou Ma
4fd9a3fdbb cmd/internal/obj, cmd/internal/ld, cmd/7l: external linking for darwin/arm64
Change-Id: I3b3f80791a1db4c2b7318f81a115972cd2237f02
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/8781
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-04-16 05:13:06 +00:00
Shenghou Ma
909bdf56d6 cmd/7g: disable duff's device on darwin
ld64 cannot handle BR26 reloc with non-zero addend. It incorrectly
thinks that non-zero addend for BR26 means the code is not PIC, but
those BR26 relocs should be fully resolved at link time.

Change-Id: I3b3f80791a1db4c2b7318f81a115972cd2237f01
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/8780
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-04-16 05:12:45 +00:00
Shenghou Ma
72f8102244 cmd/internal/obj/arm64: add SVC to unary destination list
To support "SVC $0x80", which is needed for darwin/arm64.

Change-Id: I3b3f80791a1db4c2b7318f81a115972cd2237f00
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/8769
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-04-16 05:12:28 +00:00
Dave Day
e1c1fa2919 reflect: add FuncOf function
This also involves adding functions to typelinks along with a minor
change to ensure they are sorted correctly.

Change-Id: I054a79b6498a634cbccce17579f52c299733c2cf
Reviewed-on: https://go-review.googlesource.com/1996
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-16 01:38:50 +00:00
Michael Hudson-Doyle
f616af23e0 cmd/6l: call runtime.addmoduledata from .init_array
Change-Id: I09e84161d106960a69972f5fc845a1e40c28e58f
Reviewed-on: https://go-review.googlesource.com/8331
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-15 23:54:20 +00:00
Michael Hudson-Doyle
725cd2ea72 cmd/go: support -buildmode=shared
You can now do 'go install -buildmode=shared std' and get yourself
a nice (33 meg) libstd.so (which is not useful until there is -linkshared
support as well, of course).

Change-Id: Ie9b7e7f72abc7d369a6e3ecc98903a9d197bd6e6
Reviewed-on: https://go-review.googlesource.com/8300
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-15 23:53:32 +00:00
David Crawshaw
07f00cf11e cmd/test: require external linking for c-archive
Change-Id: I9ceceb29291ea9f5d7b675dfabd665c5e3618471
Reviewed-on: https://go-review.googlesource.com/8955
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-15 22:46:47 +00:00
Michael Hudson-Doyle
5f41819593 cmd/go, go/build: add build.Package.PkgTargetRoot
This is $GOPATH/pkg/linux_amd64 or similar.  cmd/go already had a grotty calculation
of this and I need to add another one for -buildmode=shared.

Change-Id: Ied28c9b7cce671da8d45920e124a3e0c2501258a
Reviewed-on: https://go-review.googlesource.com/8930
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-15 22:45:43 +00:00
Michael Hudson-Doyle
fd0419b344 cmd/internal/ld: allow -r to override rpath when -linkshared
Including having -r "" preventing rpath from being set at all.

Change-Id: Ib40d7bf93a6e9ef21985c4a05b5703e4fbd1cd1b
Reviewed-on: https://go-review.googlesource.com/8806
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-15 22:06:04 +00:00
Josh Bleecher Snyder
7e0c11c32f cmd/6g, runtime: improve duffzero throughput
It is faster to execute

	MOVQ AX,(DI)
	MOVQ AX,8(DI)
	MOVQ AX,16(DI)
	MOVQ AX,24(DI)
	ADDQ $32,DI

than

	STOSQ
	STOSQ
	STOSQ
	STOSQ

However, in order to be able to jump into
the middle of a block of MOVQs, the call
site needs to pre-adjust DI.

If we're clearing a small area, the cost
of that DI pre-adjustment isn't repaid.

This CL switches the DUFFZERO implementation
to use a hybrid strategy, in which small
clears use STOSQ as before, but large clears
use mostly MOVQ/ADDQ blocks.

benchmark                 old ns/op     new ns/op     delta
BenchmarkClearFat8        0.55          0.55          +0.00%
BenchmarkClearFat12       0.82          0.83          +1.22%
BenchmarkClearFat16       0.55          0.55          +0.00%
BenchmarkClearFat24       0.82          0.82          +0.00%
BenchmarkClearFat32       2.20          1.94          -11.82%
BenchmarkClearFat40       1.92          1.66          -13.54%
BenchmarkClearFat48       2.21          1.93          -12.67%
BenchmarkClearFat56       3.03          2.20          -27.39%
BenchmarkClearFat64       3.26          2.48          -23.93%
BenchmarkClearFat72       3.57          2.76          -22.69%
BenchmarkClearFat80       3.83          3.05          -20.37%
BenchmarkClearFat88       4.14          3.30          -20.29%
BenchmarkClearFat128      5.54          4.69          -15.34%
BenchmarkClearFat256      9.95          9.09          -8.64%
BenchmarkClearFat512      18.7          17.9          -4.28%
BenchmarkClearFat1024     36.2          35.4          -2.21%

Change-Id: Ic786406d9b3cab68d5a231688f9e66fcd1bd7103
Reviewed-on: https://go-review.googlesource.com/2585
Reviewed-by: Keith Randall <khr@golang.org>
2015-04-15 19:17:07 +00:00
Josh Bleecher Snyder
5ed90cbbb0 cmd/internal/gc, cmd/gc: move Reg from Val to Node
Val is used to hold constant values.
Reg was the odd duck out.

Generated using eg.

No functional changes. Passes toolstash -cmp.

Change-Id: Ic1de769a1f92bb02e09a4428d998b716f307e2f6
Reviewed-on: https://go-review.googlesource.com/8912
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-15 19:02:10 +00:00
Michael Hudson-Doyle
f7be77e5b6 cmd/dist: fix bootstrapping with gccgo on 386
We forgot to add the !gccgo tag to cpuid_386.s.

Change-Id: I2de2ed92ac9686c9365cb37cd29121fa98c2bf37
Reviewed-on: https://go-review.googlesource.com/8960
Reviewed-by: Dave Cheney <dave@cheney.net>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-15 16:58:19 +00:00
Dave Cheney
888d44d3c1 cmd/internal/gc, cmd/7g: use zero register in Componentgen
Fixes #9855

Use an architectural zero register as the source for zeroing, if available.

Change-Id: Ie5b4ba4e3d356c6f892bfd1cebd14d5152bdeeb0
Reviewed-on: https://go-review.googlesource.com/8722
Reviewed-by: Keith Randall <khr@golang.org>
2015-04-15 12:26:24 +00:00
Robert Griesemer
e5b76747c9 go/importer: added go/importer package, adjusted go/types
- The go/importer package provides access to compiler-specific importers.
- Adjusted go/internal/gcimporter and go/types as needed.
- types.Check was removed - not much simpler than calling types.Config.Check.
- Package "unsafe" is now handled by the type checker; importers are not
  called for it anymore.
- In std lib tests, re-use importer for faster testing
  (no need to re-import previously imported packages).
- Minor cleanups.

The code still needs cleanups before submitting.

Change-Id: Idd456da2e9641688fe056504367348926feb0755
Reviewed-on: https://go-review.googlesource.com/8767
Reviewed-by: Alan Donovan <adonovan@google.com>
Run-TryBot: Robert Griesemer <gri@golang.org>
2015-04-15 02:28:53 +00:00
Josh Bleecher Snyder
e7fe9f56ea cmd/internal/gc: convert Bval to bool
No functional changes. Passes toolstash -cmp.

Change-Id: I4fba0c248645c3910ee3f7fc99dacafb676c5dc2
Reviewed-on: https://go-review.googlesource.com/8911
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-14 23:55:51 +00:00
Rob Pike
eba38fd780 cmd/go: do not cover package unsafe
Even if requested, there is no .go file for unsafe - it comes from the
compiler - so referencing its cover variables will break the compilation
in a command like
	go test -coverpkg=all fmt

Fixes #10408.

Change-Id: If92658ef6c29dc020f66ba30b02eaa796f7205e0
Reviewed-on: https://go-review.googlesource.com/8891
Reviewed-by: Russ Cox <rsc@golang.org>
2015-04-14 17:07:34 +00:00
Dmitry Vyukov
24f246c1b6 cmd/gc: fix crash during escape analysis
Fixes #10441

Compiler crashed as:

panic: runtime error: invalid memory address or nil pointer dereference
goroutine 1 [running]:
cmd/internal/gc.haspointers(0x0, 0xffffffffffffffff)
    src/cmd/internal/gc/reflect.go:623 +0x1f
cmd/internal/gc.escwalk(0x20c82dc00, 0xffffffffffffffff, 0x20c82dda0, 0x20c835520)
    src/cmd/internal/gc/esc.go:1291 +0x14aa
cmd/internal/gc.escwalk(0x20c82dc00, 0xffffffffffffffff, 0x20c82dda0, 0x20beac340)
    src/cmd/internal/gc/esc.go:1386 +0x836

while evaluating haspointers of the fake OADDR node here:

	leaks = level <= 0 && dst.Escloopdepth < src.Escloopdepth || level < 0 && dst == &e.funcParam && haspointers(src.Type)

Change-Id: I13c23fced52e8fcd0ae1df81b374df8632eb7790
Reviewed-on: https://go-review.googlesource.com/8932
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Dmitry Vyukov <dvyukov@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-14 15:45:26 +00:00
Brad Fitzpatrick
8b27d28ed4 cmd/5g, etc: remove outdated float type alias comment
Change-Id: Ie5fe5cf3e2926ba4f91271bd47f3f998c26e003e
Reviewed-on: https://go-review.googlesource.com/8914
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
2015-04-14 04:41:20 +00:00
Shenghou Ma
ce43e1fec8 cmd/dist: detect sse2 even with gccgo
Change-Id: Idfb20bfe130d9a54d9f5aae8eab8a34655d30610
Reviewed-on: https://go-review.googlesource.com/8865
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-13 23:27:35 +00:00
Srdjan Petrovic
41e9f8c4ed cmd: -buildmode=c-shared for linux/arm
Already supported platforms are linux/amd64 and android/arm.

Running -buildmode=c-shared on linux/arm is equivalent to:
  -ldflags "-shared" -asmflags "-shared"

Change-Id: Ifdb267f1d6508157f236be912fa369440172d161
Reviewed-on: https://go-review.googlesource.com/8895
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-04-13 23:25:12 +00:00
Dave Cheney
67805eaa95 cmd/dist: use gccgo as bootstrap compiler
Fixes #10092

This change makes it possible to use gccgo 5 as the GOROOT_BOOTSTRAP
compiler.

Change-Id: Ie3a312781ac1a09ea77f95b5a78c9488d437e0aa
Reviewed-on: https://go-review.googlesource.com/8809
Run-TryBot: Dave Cheney <dave@cheney.net>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-13 19:10:16 +00:00
David Crawshaw
fdab2f92ea misc/cgo/testcarchive: test -buildmode=c-archive
Change-Id: I1668a6885c45180ff88fe673d04cec7eba395ee7
Reviewed-on: https://go-review.googlesource.com/8861
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-13 18:31:07 +00:00
David Crawshaw
9725f2258b cmd/go: -buildmode=c-archive support
Change-Id: I469254384b0f4e5b5f08a18658934e19259935f9
Reviewed-on: https://go-review.googlesource.com/8718
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-13 13:21:20 +00:00
David Crawshaw
4c1ee3ea88 cmd/objdump: skip fork test on darwin/arm64
Just like darwin/arm.

Change-Id: Ibaba67980db6e05aa71568199b2dac2fcaa86fd6
Reviewed-on: https://go-review.googlesource.com/8824
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-13 12:03:36 +00:00
David Crawshaw
d5bb4380c8 cmd/pack: skip fork test on darwin/arm64
Just like darwin/arm.

Change-Id: I5ed26975670d4189a46b585a56c66c199905d168
Reviewed-on: https://go-review.googlesource.com/8823
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-13 11:58:27 +00:00
David Crawshaw
2ce82c6c65 cmd/go: run darwin/arm64 tests sequentially
Just like darwin/arm, the test devices can only install and execute
a single app at a time.

Change-Id: I74e6130ef83537c465b4585a366d02953fd907bf
Reviewed-on: https://go-review.googlesource.com/8827
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-13 11:57:34 +00:00
Brad Fitzpatrick
dc2d64bf81 cmd/go: cache results of HTTP requests done during meta tag discovery
Previously, running

  $ go get -u -v golang.org/x/tools/cmd/godoc

would results in dozens of HTTP requests for

  https://golang.org/x/tools?go-get=1

once per package under x/tools.

Now it caches the results. We still end up doing one HTTP request for
all the packages under x/tools, but this reduces the total number of
HTTP requests in ~half.

This also moves the singleflight package back into an internal
package. singleflight was originally elsewhere as a package, then got
copied into "net" (without its tests). But now that we have internal,
put it in its own package, and restore its test.

Fixes #9249

Change-Id: Ieb5cf04fc4d0a0c188cb957efdc7ea3068c34e3f
Reviewed-on: https://go-review.googlesource.com/8727
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-13 07:08:00 +00:00
Hyang-Ah (Hana) Kim
63c16b1878 cmd/go: fix a typo.
Change-Id: Ic453da17817f66e1073f6ba740b830b8daf2fc38
Reviewed-on: https://go-review.googlesource.com/8829
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-12 16:36:15 +00:00
David Crawshaw
ced7ffe95b cmd/interal/ld: darwin c-archive buildmode support
Uses ar to create an archive when -buildmode=c-archive.

A small example (that I hope to turn into a test in a later CL):

goarchive.go:
	package main

	import "fmt"

	import "C"

	func init() {
		fmt.Println("ran go init")
	}

	//export FuncInGo
	func FuncInGo() {
		fmt.Println("called a go function")
	}

	func main() {
		fmt.Println("in main")
	}

This can be compiled with:

	go build -ldflags=-buildmode=c-archive -o=libgo.a goarchive.go

main.c:

	#include <stdio.h>

	extern void FuncInGo();

	int main(void) {
		printf("c hello\n");
		FuncInGo();
		printf("c goodbye\n");
		return 0;
	}

Can be compiled with:

	cc main.c libgo.a

Apple provide a warning about the lack of PIE, but still produce a
binary which runs and outputs (on darwin/amd64):

	c hello
	ran go init
	called a go function
	c goodbye

Change-Id: I7611925f210a83afa6bd1e66a5601dd636a428c8
Reviewed-on: https://go-review.googlesource.com/8711
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-12 14:00:32 +00:00
David Crawshaw
922a412822 cmd/addr2line: skip fork test on darwin/arm64
Just like darwin/arm.

Change-Id: Ia84662f58f6b1bb168cce8a9837945b1cbd175e1
Reviewed-on: https://go-review.googlesource.com/8828
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-12 11:53:24 +00:00
David Crawshaw
2f14b16149 cmd/internal/obj/x86: skip test on darwin/arm64
Just like darwin/arm, cannot fork..

Change-Id: If565afbceb79013b9e3103e1e28d93691e9fc0a5
Reviewed-on: https://go-review.googlesource.com/8826
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-12 11:52:53 +00:00
David Crawshaw
bbbbca78a6 cmd/nm: skip fork test on darwin/arm64
Just like darwin/arm.

Change-Id: Iabb6282f18548da43117ee60f7ad6e272502f09d
Reviewed-on: https://go-review.googlesource.com/8825
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-12 11:52:22 +00:00
Michael Hudson-Doyle
75c0566b55 cmd/6l: support -linkshared
Change-Id: Id469165b1acd383837b1f4e1e6f961e10dfa5d61
Reviewed-on: https://go-review.googlesource.com/8332
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
2015-04-11 19:36:19 +00:00
Matthew Dempsky
ce469fadd8 cmd/5g, cmd/internal/ld, cmd/internal/obj: destutter composite literals
While here, this changes DWAbbrev's attr field from a [30]DWAttrForm
with zero-termination to a simple []DWAttrForm, and updates its users
accordingly.

Passes "go build -toolexec 'toolstash -cmp' -a std" on linux/amd64.

Change-Id: I52b5f7a749bdb3e7588fc8ebdb8fee2cf8cab602
Reviewed-on: https://go-review.googlesource.com/8762
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dave Cheney <dave@cheney.net>
2015-04-11 19:31:40 +00:00
Dmitry Vyukov
985461fd9e cmd/go: fix error message
Change-Id: I440435927fc9f417d81ed4e8656a73787bf0968a
Reviewed-on: https://go-review.googlesource.com/8801
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-11 19:04:51 +00:00
Michael Hudson-Doyle
d765e41c62 cmd/internal/ld: make a few more symbols local
The symbols for the actual data in a constant string or bytes literal should
be local.

Change-Id: Idafcfba9a638eaa4e460e5103d96843960559b35
Reviewed-on: https://go-review.googlesource.com/8772
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
2015-04-11 17:37:18 +00:00
Michael Hudson-Doyle
09fb56dc7d cmd/go: start support for -linkshared
This will fruitlessly rebuild stale packages that are in a shared
library.

Change-Id: I66a6e1adf7818558e7d1351ab215a5021b4a8a6b
Reviewed-on: https://go-review.googlesource.com/8333
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-11 17:19:00 +00:00
Michael Hudson-Doyle
1d1c61ba7d cmd/6g: call duffcopy, duffzero via got when dynamically linking go
Jumping to an offset past a symbol isn't something that is really
supported by dynamic linkers, so do it by hand.

Change-Id: Ifff8834c6cdfa3d521ebd8479d2e93906df9b258
Reviewed-on: https://go-review.googlesource.com/8238
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
2015-04-11 00:52:39 +00:00
Dmitry Vyukov
08c43488ee cmd/gc: fix handling of OGETG in race mode
Now that getg is an intrinsic, more runtime functions
gets inlined (in particular, LockOSThread).
Runtime code gets race instrumented after inlining into
other packages. This can lead to false positives,
as race detector ignores all internal synchronization in runtime.
Inling of LockOSThread lead to false race reports on m contents.
See the issue for an example.

Fixes #10380

Change-Id: Ic9b760b53c28c2350bc54a5d4677fcd1c1f86e5f
Reviewed-on: https://go-review.googlesource.com/8690
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Dmitry Vyukov <dvyukov@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-10 18:40:16 +00:00
Dave Cheney
4b21be4670 cmd/internal/gc: clean up Componentgen
Update #9855

In preparation for introducing direct use of a zero register on
platforms that support it, take the opportunity to clean up
Componentgen a bit.

Change-Id: I120ce1ffcca8c4f7603bfe76bfa1aedd27ebb4d2
Reviewed-on: https://go-review.googlesource.com/8691
Run-TryBot: Dave Cheney <dave@cheney.net>
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-10 08:16:51 +00:00
Michael Hudson-Doyle
a1f57598cc runtime, cmd/internal/ld: rename themoduledata to firstmoduledata
'themoduledata' doesn't really make sense now we support multiple moduledata
objects.

Change-Id: I8263045d8f62a42cb523502b37289b0fba054f62
Reviewed-on: https://go-review.googlesource.com/8521
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-10 05:11:49 +00:00
Daniel Theophanes
a2a8a0468a cmd/internal/obj/x86: look for go cmd in GOBIN if present.
If GOBIN is not empty the build moves the go executable
to a new path. When this test runs it fails to find the
go cmd in the GOROOT.

Change-Id: I100def0fbcb9691b13776f795b1d1725e36d8102
Reviewed-on: https://go-review.googlesource.com/8735
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-10 04:57:00 +00:00
Michael Hudson-Doyle
fae4a128cb runtime, reflect: support multiple moduledata objects
This changes all the places that consult themoduledata to consult a
linked list of moduledata objects, as will be necessary for
-linkshared to work.

Obviously, as there is as yet no way of adding moduledata objects to
this list, all this change achieves right now is wasting a few
instructions here and there.

Change-Id: I397af7f60d0849b76aaccedf72238fe664867051
Reviewed-on: https://go-review.googlesource.com/8231
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-10 04:51:42 +00:00
Michael Hudson-Doyle
cb6e9ec03d cmd/go: support -buildmode=default,archive,exe,c-shared
Modelled somewhat on the -race support.

Change-Id: I137037addfc76341f7deb216776fdd18e9af9fe5
Reviewed-on: https://go-review.googlesource.com/8680
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-10 04:08:10 +00:00
Michael Hudson-Doyle
84207a2500 cmd/internal/obj/x86, cmd/internal/ld, cmd/6l: 6g/asm -dynlink accesses global data via a GOT
Change-Id: I49862e177045369d6c94d6a58afbdace4f13cc96
Reviewed-on: https://go-review.googlesource.com/8237
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-10 03:47:47 +00:00
Billie H. Cleek
a2d12201ad cmd/go: detect which VCS to use with Bitbucket when the API call fails.
The API call will fail when Bitbucket repositories are private. In
that case, probe for the repository using vcsCmd.ping.

      Fixes #5375

Change-Id: Ia604ecf9014805579dfda4b5c8e627a52783d56e
Reviewed-on: https://go-review.googlesource.com/1910
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-09 09:57:12 +00:00
Dmitry Vyukov
878a86a129 cmd/gc: fix escape analysis of closures
Fixes #10353

See test/escape2.go:issue10353. Previously new(int) did not escape to heap,
and so heap-allcated closure was referencing a stack var. This breaks
the invariant that heap must not contain pointers to stack.

Look at the following program:

package main

func main() {
	foo(new(int))
	bar(new(int))
}

func foo(x *int) func() {
	return func() {
		println(*x)
	}
}

// Models what foo effectively does.
func bar(x *int) *C {
	return &C{x}
}

type C struct {
	x *int
}

Without this patch escape analysis works as follows:

$ go build -gcflags="-m -m -m -l" esc.go
escflood:1: dst ~r1 scope:foo[0]
escwalk: level:0 depth:0  func literal( l(9) f(1) esc(no) ld(1)) scope:foo[1]
/tmp/live2.go:9: func literal escapes to heap
escwalk: level:0 depth:1 	 x( l(8) class(PPARAM) f(1) esc(no) ld(1)) scope:foo[1]
/tmp/live2.go:8: leaking param: x to result ~r1

escflood:2: dst ~r1 scope:bar[0]
escwalk: level:0 depth:0  &C literal( l(15) esc(no) ld(1)) scope:bar[1]
/tmp/live2.go:15: &C literal escapes to heap
escwalk: level:-1 depth:1 	 &C literal( l(15)) scope:bar[0]
escwalk: level:-1 depth:2 		 x( l(14) class(PPARAM) f(1) esc(no) ld(1)) scope:bar[1]
/tmp/live2.go:14: leaking param: x

/tmp/live2.go:5: new(int) escapes to heap
/tmp/live2.go:4: main new(int) does not escape

new(int) does not escape while being captured by the closure.
With this patch escape analysis of foo and bar works similarly:

$ go build -gcflags="-m -m -m -l" esc.go
escflood:1: dst ~r1 scope:foo[0]
escwalk: level:0 depth:0  &(func literal)( l(9)) scope:foo[0]
escwalk: level:-1 depth:1 	 func literal( l(9) f(1) esc(no) ld(1)) scope:foo[1]
/tmp/live2.go:9: func literal escapes to heap
escwalk: level:-1 depth:2 		 x( l(8) class(PPARAM) f(1) esc(no) ld(1)) scope:foo[1]
/tmp/live2.go:8: leaking param: x

escflood:2: dst ~r1 scope:bar[0]
escwalk: level:0 depth:0  &C literal( l(15) esc(no) ld(1)) scope:bar[1]
/tmp/live2.go:15: &C literal escapes to heap
escwalk: level:-1 depth:1 	 &C literal( l(15)) scope:bar[0]
escwalk: level:-1 depth:2 		 x( l(14) class(PPARAM) f(1) esc(no) ld(1)) scope:bar[1]
/tmp/live2.go:14: leaking param: x

/tmp/live2.go:4: new(int) escapes to heap
/tmp/live2.go:5: new(int) escapes to heap

Change-Id: Ifd14b7ae3fc11820e3b5eb31eb07f35a22ed0932
Reviewed-on: https://go-review.googlesource.com/8408
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Dmitry Vyukov <dvyukov@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-09 09:56:27 +00:00
Dave Cheney
ef49b4ca78 cmd/internal/obj/arm64, cmd/asm/internal/asm: support CSEL instruction on arm64
Add support for arm64 four operand conditional instructions.

Superceedes CL 8405.

Change-Id: I12da8f4822938feec400bbcc426eeaf884536135
Reviewed-on: https://go-review.googlesource.com/8638
Reviewed-by: Aram Hăvărneanu <aram@mgk.ro>
2015-04-09 08:07:21 +00:00
Michael Hudson-Doyle
00bc19e996 cmd/internal/ld: support for -buildmode=shared
Change-Id: Id4997d611ced29397133f14def6abc88aa9e811e
Reviewed-on: https://go-review.googlesource.com/8252
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-09 00:51:02 +00:00
Michael Hudson-Doyle
6f6512bd60 cmd/internal/gc, etc: remove dead code
Found with https://github.com/opennota/check.

Change-Id: I50c173382782fb16b15100e02c1c85610bc233a0
Reviewed-on: https://go-review.googlesource.com/7130
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-08 22:36:44 +00:00
David Crawshaw
b1d1564f1a cmd/internal/ld: clean up hostlink I/O
Change-Id: I6c3a62403941d357ffd9d0025289c2180139b0bd
Reviewed-on: https://go-review.googlesource.com/8664
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-08 21:58:48 +00:00
Michael Hudson-Doyle
2a5f88d850 cmd/internal/ld: add -buildmode=c-shared as an alternative to -shared
The linker currently (on some platforms) takes a -shared flag, which means
approximately what -buildmode=c-shared means in the in the proposed "Go
Execution Modes" document. As part of implementing other modes, the term
"shared" becomes horribly overloaded, so this replaces -shared with a
-buildmode argument instead (which currently only handles -buildmode=c-shared
and the default -buildmode=exe -- no new behaviour here).

As the linker support for -shared was in 1.4 this retains it as an alias.

Change-Id: Id2ebb8e05ee07f46208a554bc2622d0e67b47082
Reviewed-on: https://go-review.googlesource.com/8304
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-08 21:51:14 +00:00
David Crawshaw
47746f10fe cmd/internal/ld: emit macho .init_array section
Change-Id: Ie75a01e899e68f4f9643410f5e161152a81b8ba0
Reviewed-on: https://go-review.googlesource.com/8655
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-08 21:36:26 +00:00
Rob Pike
3b1d0d0f07 cmd/asm: remove object file if assembly fails.
Just an oversight. Plus the code had an unnecessary call to os.Exit
that now has a purpose.

Fixes #10372.

Change-Id: I456018f3a01ca05b4501c7f8a4961d48ab8c5e16
Reviewed-on: https://go-review.googlesource.com/8651
Reviewed-by: Minux Ma <minux@golang.org>
2015-04-08 18:29:17 +00:00
Ian Lance Taylor
7ac67b5568 cmd/internal/ld: change elf64 from int to bool
Change-Id: Iaf2dba7d699a8d52f91ce10222ab0d1a0f1f21fc
Reviewed-on: https://go-review.googlesource.com/8625
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-08 16:54:18 +00:00
Michael Hudson-Doyle
3a84e3305b runtime, cmd/internal/ld: initialize themoduledata slices directly
This CL is quite conservative in some ways.  It continues to define
symbols that have no real purpose (e.g. epclntab).  These could be
deleted if there is no concern that external tools might look for them.

It would also now be possible to make some changes to the pcln data but
I get the impression that would definitely require some thought and
discussion.

Change-Id: Ib33cde07e4ec38ecc1d6c319a10138c9347933a3
Reviewed-on: https://go-review.googlesource.com/7616
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-08 16:20:57 +00:00
Dave Cheney
5c22a4a2e1 cmd/7g: reactivate componentgen
Update #10203

When the portable componentgen was introduced in b960263 it
produced broken code on arm64 and was deactivated. In the month since
it looks like the underlying issues have been fixed so componentgen
produces working binaries that are slightly smaller, ~3kb reduction in
size for godoc binary.

Benchmarks are underwhelming, but where visible, trending towards
an improvement (this is with Minux's peep optimiser CL).

benchmark                          old ns/op       new ns/op       delta
BenchmarkBinaryTree17              15336842000     15002766000     -2.18%
BenchmarkFannkuch11                10848984000     10896931000     +0.44%
BenchmarkFmtFprintfEmpty           203             188             -7.39%
BenchmarkFmtFprintfString          753             720             -4.38%
BenchmarkFmtFprintfInt             667             670             +0.45%
BenchmarkFmtFprintfIntInt          1103            1102            -0.09%
BenchmarkFmtFprintfPrefixedInt     981             969             -1.22%
BenchmarkFmtFprintfFloat           1396            1348            -3.44%
BenchmarkFmtManyArgs               4151            4102            -1.18%
BenchmarkGobDecode                 34202360        32933020        -3.71%
BenchmarkGobEncode                 27579180        27438820        -0.51%
BenchmarkGzip                      1296119000      1285096000      -0.85%
BenchmarkGunzip                    291099800       289727200       -0.47%
BenchmarkHTTPClientServer          169476          169803          +0.19%
BenchmarkJSONEncode                70313600        69973400        -0.48%
BenchmarkJSONDecode                227811800       232875200       +2.22%
BenchmarkMandelbrot200             12985600        12996430        +0.08%
BenchmarkGoParse                   14708930        14507320        -1.37%
BenchmarkRegexpMatchEasy0_32       464             460             -0.86%
BenchmarkRegexpMatchEasy0_1K       4516            4517            +0.02%
BenchmarkRegexpMatchEasy1_32       452             454             +0.44%
BenchmarkRegexpMatchEasy1_1K       4664            4669            +0.11%
BenchmarkRegexpMatchMedium_32      602             602             +0.00%
BenchmarkRegexpMatchMedium_1K      172939          172494          -0.26%
BenchmarkRegexpMatchHard_32        9733            9577            -1.60%
BenchmarkRegexpMatchHard_1K        301356          298143          -1.07%
BenchmarkRevcomp                   2754334000      2753874000      -0.02%
BenchmarkTemplate                  315664000       311810800       -1.22%
BenchmarkTimeParse                 1034            989             -4.35%
BenchmarkTimeFormat                1118            1137            +1.70%

benchmark                         old MB/s     new MB/s     speedup
BenchmarkGobDecode                22.44        23.31        1.04x
BenchmarkGobEncode                27.83        27.97        1.01x
BenchmarkGzip                     14.97        15.10        1.01x
BenchmarkGunzip                   66.66        66.98        1.00x
BenchmarkJSONEncode               27.60        27.73        1.00x
BenchmarkJSONDecode               8.52         8.33         0.98x
BenchmarkGoParse                  3.94         3.99         1.01x
BenchmarkRegexpMatchEasy0_32      68.92        69.47        1.01x
BenchmarkRegexpMatchEasy0_1K      226.71       226.65       1.00x
BenchmarkRegexpMatchEasy1_32      70.75        70.42        1.00x
BenchmarkRegexpMatchEasy1_1K      219.55       219.28       1.00x
BenchmarkRegexpMatchMedium_32     1.66         1.66         1.00x
BenchmarkRegexpMatchMedium_1K     5.92         5.94         1.00x
BenchmarkRegexpMatchHard_32       3.29         3.34         1.02x
BenchmarkRegexpMatchHard_1K       3.40         3.43         1.01x
BenchmarkRevcomp                  92.28        92.29        1.00x
BenchmarkTemplate                 6.15         6.22         1.01x

Change-Id: I0b7d95388d6920fcbd7fe305df0c7c630a407726
Reviewed-on: https://go-review.googlesource.com/8636
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-08 15:52:47 +00:00
Dave Cheney
fb919e3a60 cmd/asm/internal/asm: add arm64 end to end tests
Add end to end tests for arm64 to support CL 8405.

There are several instruction forms commented out at the moment
they will be addressed in CL 8405 or later followups.

Change-Id: I6eeeb810c1e03cd49bb3c881bc46a29cdb817822
Reviewed-on: https://go-review.googlesource.com/8631
Reviewed-by: Aram Hăvărneanu <aram@mgk.ro>
Reviewed-by: Rob Pike <r@golang.org>
2015-04-08 14:42:51 +00:00
Shenghou Ma
7a96ecde4d cmd/internal/ld: force external linking on linux/arm64 with cgo
Update #10373.

Change-Id: I309e3df7608b9eef9339196fdc50dedf5f9439f5
Reviewed-on: https://go-review.googlesource.com/8452
Reviewed-by: Aram Hăvărneanu <aram@mgk.ro>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-04-08 09:08:52 +00:00
Shenghou Ma
6e3a2a3f9f cmd/internal/obj/arm64, cmd/internal/ld, cmd/7l: remove absolute addressing in .text
This CL introduces R_ADDRARM64, which is similar to R_ADDRPOWER.

Fixes #10112.

Change-Id: I309e3df7608b9eef9339196fdc50dedf5f9439f1
Reviewed-on: https://go-review.googlesource.com/8438
Reviewed-by: Aram Hăvărneanu <aram@mgk.ro>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-04-08 09:07:48 +00:00
Shenghou Ma
f55b2a11f4 cmd/internal/ld, cmd/7l: external linking support for linux/arm64
Based on Michael Hudson-Doyle's patch:
b735215ee4

Change-Id: I309e3df7608b9eef9339196fdc50dedf5f9439f0
Reviewed-on: https://go-review.googlesource.com/8437
Reviewed-by: Aram Hăvărneanu <aram@mgk.ro>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-04-08 09:07:32 +00:00
Shenghou Ma
a50b24c649 cmd/api: make the test more robust
Previously, the TestCompareAPI test would fail if runtime.Version()
is "dev", or, more importantly, "go1.5"; because compareAPI depends
on runtime.Version and -allow_new flag. Move that logic out make
its test more robust.

Change-Id: I8f40daa1838b8acd26adac8848762d95315053b0
Reviewed-on: https://go-review.googlesource.com/8622
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-08 08:46:42 +00:00
Shenghou Ma
63d72f6901 cmd/7g: enable peephole optimizer
Based on cmd/9g/peep.go.

Go 1 benchmark comparison:
benchmark                          old ns/op       new ns/op       delta
BenchmarkBinaryTree17              24328574000     18351639000     -24.57%
BenchmarkFannkuch11                17029365000     10817758000     -36.48%
BenchmarkFmtFprintfEmpty           291             223             -23.37%
BenchmarkFmtFprintfString          1073            799             -25.54%
BenchmarkFmtFprintfInt             1024            778             -24.02%
BenchmarkFmtFprintfIntInt          1654            1277            -22.79%
BenchmarkFmtFprintfPrefixedInt     1360            1083            -20.37%
BenchmarkFmtFprintfFloat           2272            1415            -37.72%
BenchmarkFmtManyArgs               5933            4742            -20.07%
BenchmarkGobDecode                 53166003        38584736        -27.43%
BenchmarkGobEncode                 37930156        30074874        -20.71%
BenchmarkGzip                      1880638900      1286832100      -31.57%
BenchmarkGunzip                    386343633       292194480       -24.37%
BenchmarkHTTPClientServer          237077          179776          -24.17%
BenchmarkJSONEncode                101731690       73116925        -28.13%
BenchmarkJSONDecode                344655360       241277600       -29.99%
BenchmarkMandelbrot200             28329778        12950809        -54.29%
BenchmarkGoParse                   21670755        16554244        -23.61%
BenchmarkRegexpMatchEasy0_32       557             484             -13.11%
BenchmarkRegexpMatchEasy0_1K       4687            4832            +3.09%
BenchmarkRegexpMatchEasy1_32       539             483             -10.39%
BenchmarkRegexpMatchEasy1_1K       5100            5080            -0.39%
BenchmarkRegexpMatchMedium_32      796             651             -18.22%
BenchmarkRegexpMatchMedium_1K      233099          182047          -21.90%
BenchmarkRegexpMatchHard_32        13202           9897            -25.03%
BenchmarkRegexpMatchHard_1K        401027          303602          -24.29%
BenchmarkRevcomp                   3837679666      2816546600      -26.61%
BenchmarkTemplate                  440608300       324831040       -26.28%
BenchmarkTimeParse                 1460            1019            -30.21%
BenchmarkTimeFormat                1609            1174            -27.04%

benchmark                         old MB/s     new MB/s     speedup
BenchmarkGobDecode                14.44        19.89        1.38x
BenchmarkGobEncode                20.24        25.52        1.26x
BenchmarkGzip                     10.32        15.08        1.46x
BenchmarkGunzip                   50.23        66.41        1.32x
BenchmarkJSONEncode               19.07        26.54        1.39x
BenchmarkJSONDecode               5.63         8.04         1.43x
BenchmarkGoParse                  2.67         3.50         1.31x
BenchmarkRegexpMatchEasy0_32      57.38        66.05        1.15x
BenchmarkRegexpMatchEasy0_1K      218.47       211.91       0.97x
BenchmarkRegexpMatchEasy1_32      59.29        66.21        1.12x
BenchmarkRegexpMatchEasy1_1K      200.76       201.54       1.00x
BenchmarkRegexpMatchMedium_32     1.26         1.53         1.21x
BenchmarkRegexpMatchMedium_1K     4.39         5.62         1.28x
BenchmarkRegexpMatchHard_32       2.42         3.23         1.33x
BenchmarkRegexpMatchHard_1K       2.55         3.37         1.32x
BenchmarkRevcomp                  66.23        90.24        1.36x
BenchmarkTemplate                 4.40         5.97         1.36x

Fixes #10105.

Change-Id: I353cc9fdf922e431821508c9dbbe4d9a85d64bd4
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/8471
Reviewed-by: Dave Cheney <dave@cheney.net>
2015-04-08 08:16:54 +00:00
Shenghou Ma
84b690fee1 cmd/api: re-enable TestGolden on nacl
Fixes #10369.

Change-Id: If0a6d2b33c6862c9f7f862bdc997f2204072c6dc
Reviewed-on: https://go-review.googlesource.com/8620
Run-TryBot: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2015-04-08 06:36:36 +00:00
Shenghou Ma
a175fa3bc3 cmd/asm/internal/asm: parse arm64 register pairs for LDP/STP
Add test, and while we're at here, also add a test for ARM.

Fixes #10343.

Change-Id: Ic914df8233d4f1f495e2cc0743fbd37b7671bc91
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/8472
Reviewed-by: Aram Hăvărneanu <aram@mgk.ro>
Reviewed-by: Rob Pike <r@golang.org>
2015-04-08 05:22:41 +00:00
Robert Griesemer
b2a1fb74f4 cmd/api: update api checker to use go/types from std repo
The old code checked out a specific version of go/types from the
x/tools repo. With go/types being part of the std repo, this is
not necessary anymore.

Also, for the same reason, the api tool is now built like any
other regular command. There's no need to build it for each run.
Removed the respective +build tags.

Change-Id: I5088e4867223d676957084c24651ec05452ac495
Reviewed-on: https://go-review.googlesource.com/8564
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-08 04:09:34 +00:00
Robert Griesemer
bb418a59f8 cmd/internal/gc: use approx. float formatting in error messages
For very out-of-range floating-point constants (1e100000000),
precise formatting of the offending value for error messages
is not needed and potentially extremely slow.

This change resurrects an adjusted variant of the original code
which uses float64 formatting in the common case (in-range values),
and a fast manual approximation for out-of-range values.

Change-Id: I2f6e53040929b8bf924dac4bb27c4d811ede48e2
Reviewed-on: https://go-review.googlesource.com/8470
Reviewed-by: Alan Donovan <adonovan@google.com>
2015-04-07 23:01:01 +00:00
Michael Hudson-Doyle
b643684feb cmd/go: re-run mkdoc.sh
Adds $DOLLAR to doc.go

Change-Id: Ia0ccdd9b5292010297ae95debab4acf50d3c4d9c
Reviewed-on: https://go-review.googlesource.com/8600
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-07 22:44:27 +00:00
Dave Cheney
d3252a2db9 cmd/internal/gc: fix race build (again)
Add OGETG to the list of ignored operations.

We don't instrument the runtime package, but calls to runtime.getg
can appear in other packages, for example, after inlining
runtime.LockOSThread.

Change-Id: I8d6e91f1f3c8fd1302b596bdead42d588c059911
Reviewed-on: https://go-review.googlesource.com/8553
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
2015-04-07 16:38:57 +00:00
Dave Cheney
d6b4069852 cmd/internal/gc: fix race build
Add special case for OGETG which should never be instrumented.

Change-Id: I7d082abb8608537f82b03362b687baf2a1d809dc
Reviewed-on: https://go-review.googlesource.com/8551
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
2015-04-07 15:44:34 +00:00
Russ Cox
92c826b1b2 cmd/internal/gc: inline runtime.getg
This more closely restores what the old C runtime did.
(In C, g was an 'extern register' with the same effective
implementation as in this CL.)

On a late 2012 MacBookPro10,2, best of 5 old vs best of 5 new:

benchmark                          old ns/op      new ns/op      delta
BenchmarkBinaryTree17              4981312777     4463426605     -10.40%
BenchmarkFannkuch11                3046495712     3006819428     -1.30%
BenchmarkFmtFprintfEmpty           89.3           79.8           -10.64%
BenchmarkFmtFprintfString          284            262            -7.75%
BenchmarkFmtFprintfInt             282            262            -7.09%
BenchmarkFmtFprintfIntInt          480            448            -6.67%
BenchmarkFmtFprintfPrefixedInt     382            358            -6.28%
BenchmarkFmtFprintfFloat           529            486            -8.13%
BenchmarkFmtManyArgs               1849           1773           -4.11%
BenchmarkGobDecode                 12835963       11794385       -8.11%
BenchmarkGobEncode                 10527170       10288422       -2.27%
BenchmarkGzip                      436109569      438422516      +0.53%
BenchmarkGunzip                    110121663      109843648      -0.25%
BenchmarkHTTPClientServer          81930          85446          +4.29%
BenchmarkJSONEncode                24638574       24280603       -1.45%
BenchmarkJSONDecode                93022423       85753546       -7.81%
BenchmarkMandelbrot200             4703899        4735407        +0.67%
BenchmarkGoParse                   5319853        5086843        -4.38%
BenchmarkRegexpMatchEasy0_32       151            151            +0.00%
BenchmarkRegexpMatchEasy0_1K       452            453            +0.22%
BenchmarkRegexpMatchEasy1_32       131            132            +0.76%
BenchmarkRegexpMatchEasy1_1K       761            722            -5.12%
BenchmarkRegexpMatchMedium_32      228            224            -1.75%
BenchmarkRegexpMatchMedium_1K      63751          64296          +0.85%
BenchmarkRegexpMatchHard_32        3188           3238           +1.57%
BenchmarkRegexpMatchHard_1K        95396          96756          +1.43%
BenchmarkRevcomp                   661587262      687107364      +3.86%
BenchmarkTemplate                  108312598      104008540      -3.97%
BenchmarkTimeParse                 453            459            +1.32%
BenchmarkTimeFormat                475            441            -7.16%

The garbage benchmark from the benchmarks subrepo gets 2.6% faster as well.

Change-Id: I320aeda332db81012688b26ffab23f6581c59cfa
Reviewed-on: https://go-review.googlesource.com/8460
Reviewed-by: Rick Hudson <rlh@golang.org>
Run-TryBot: Rick Hudson <rlh@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2015-04-07 14:26:47 +00:00
Alex Brainman
b40421f32c cmd/dist: add misc/cgo/test with -linkmode=auto
Change-Id: I5939524f75f8fbbd67bd54b7c9e4b8c162337e9d
Reviewed-on: https://go-review.googlesource.com/8525
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-07 07:07:12 +00:00
Josh Bleecher Snyder
75883bae28 cmd/internal/gc: convert yet more Node fields to bools
Convert Embedded, Method, and Colas to bools.

I believe that this is the last of the Node fields
that can be trivially converted to bools.

No functional changes. Passes toolstash -cmp.

Change-Id: I81962ee47866596341fc60d24d6959c20cd7fc1c
Reviewed-on: https://go-review.googlesource.com/8440
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-07 03:10:30 +00:00
Michael Hudson-Doyle
bec4481dd3 cmd/internal/ld: remove extraneous parentheses
Ian complained about these in a review and then submitted the change
before I could fix them.

Change-Id: I23d890db2f3648ed1003ed3d13e7247435b913e5
Reviewed-on: https://go-review.googlesource.com/8480
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-07 01:40:40 +00:00
Josh Bleecher Snyder
5451fff475 doc/progs: rewrite test driver in Go
The tests in doc/progs appear to have been originally written
for use with the old test driver. At some later point,
they acquired their own test driver.
Both ran tests in serial.

This CL rewrites the current test driver in Go,
runs tests concurrently, and cleans up
historical artifacts from the old drivers.

The primary motivation is to speed up all.bash.
On my laptop, using tip, this CL reduces doc/progs test
wall time from 26s to 7s. The savings will remain
even when the compiler gets faster. Using Go 1.4,
this CL reduces test wall time from 15s to 4s.

Change-Id: Iae945a8490222beee76e8a2118a0d7956092f543
Reviewed-on: https://go-review.googlesource.com/8410
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2015-04-07 00:41:59 +00:00