GitLab

Mix in several other minor cleanups, including adding some new methods
to Nodes: Index, Addr, SetIndex, SetNodes.

Passes toolstash -cmp.

Update #14473.

Change-Id: I8bd4ae3fde7c5e20ba66e7dd1654fbc70c3ddeb8
Reviewed-on: https://go-review.googlesource.com/20491

Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This CL was automatically generated using a special-purpose AST
rewriting tool, followed by manual editing to put some comments back in
the right places and fix some bad line breaks.

The result is not perfect but it's a big step toward getting back to
sanity, and because it was automatically generated there is a decent
chance that it is correct.

Passes toolstash -cmp.

Update #14473.

Change-Id: I01c09078a6d78e2b008bc304d744b79469a38d3d
Reviewed-on: https://go-review.googlesource.com/20440

Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

More idiomatic naming (in particular, matches the naming used for
go/types.Signature).

Also, convert more code to use these methods and/or IterFields.
(Still more to go; only made a quick pass for low hanging fruit.)

Passes toolstash -cmp.

Change-Id: I61831bfb1ec2cd50d4c7efc6062bca4e0dcf267b
Reviewed-on: https://go-review.googlesource.com/20451

Reviewed-by: Ian Lance Taylor <iant@golang.org>

Passes toolstash -cmp.

Update #14473.

Change-Id: I717ebd948dfc8faf8b9ef5aa02c67484af618d18
Reviewed-on: https://go-review.googlesource.com/20359

Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Compile time is about the same.  Getting rid of the nodeSeq interfaces,
particularly nodeSeqIterate, should produce some improvements.

Passes toolstash -cmp.

Update #14473.

Change-Id: I678abafdd9129c6cccb0ec980511932eaed496a0
Reviewed-on: https://go-review.googlesource.com/20343

Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Found by temporarily flipping fields from *NodeList to Nodes and fixing
all the compilation errors.  This CL does not actually change any
fields.

Passes toolstash -cmp.

Update #14473.

Change-Id: Ib98fa37e8752f96358224c973a743618a6a0e736
Reviewed-on: https://go-review.googlesource.com/20320


Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Eliminates type conversions in a bunch of Oconv(int(n.Op), ...) calls.

Notably, this identified a misuse of Oconv in amd64/gsubr.go to try to
print an assembly instruction op instead of a compiler node op.

Change-Id: I93b5aa49fe14a5eaf868b05426d3b8cd8ab52bc5
Reviewed-on: https://go-review.googlesource.com/20298


Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Passes toolstash -cmp.

Update #14473.

Change-Id: I836197810405cde72cbb49fef7e163a517601f9c
Reviewed-on: https://go-review.googlesource.com/20242

Reviewed-by: David Crawshaw <crawshaw@golang.org>

Add new functions setNodeSeqNode, appendNodeSeq, appendNodeSeqNode.

Passes toolstash -cmp.

Change-Id: I6c1745b1108dea45a2c0d029b9de1917ae17a962
Reviewed-on: https://go-review.googlesource.com/20196


Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: I59ce1b40bc3472cc92a9a0a9fbd32342e0b945ad
Reviewed-on: https://go-review.googlesource.com/20152

Reviewed-by: Matthew Dempsky <mdempsky@google.com>

Change-Id: Ia3e5d62b9d38a6c356baec8eb88b2bdabff5820f
Reviewed-on: https://go-review.googlesource.com/20150

Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Robert Griesemer <gri@golang.org>

Change-Id: Ic9ca792b55cc4ebd0ac6cfa2fbdb58030893bacd
Reviewed-on: https://go-review.googlesource.com/20132


Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

- removed lots of unnecessary int(x) casts
- removed parserline() - was inconsistently used anyway
- minor simplifications in dcl.go

Change-Id: Ibf7de679eea528a31c9692ef1c76a1d9b3239211
Reviewed-on: https://go-review.googlesource.com/20131

Reviewed-by: Matthew Dempsky <mdempsky@google.com>

The tree's pretty inconsistent about single space vs double space
after a period in documentation. Make it consistently a single space,
per earlier decisions. This means contributors won't be confused by
misleading precedence.

This CL doesn't use go/doc to parse. It only addresses // comments.
It was generated with:

$ perl -i -npe 's,^(\s*// .+[a-z]\.)  +([A-Z]),$1 $2,' $(git grep -l -E '^\s*//(.+\.)  +([A-Z])')
$ go test go/doc -update

Change-Id: Iccdb99c37c797ef1f804a94b22ba5ee4b500c4f7
Reviewed-on: https://go-review.googlesource.com/20022

Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Dave Day <djd@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Passes toolstash -cmp.

Casual timings show about a 3% improvement in compile times.

Update #14473.

Change-Id: I584add2e8f1a52486ba418b25ba6122b7347b643
Reviewed-on: https://go-review.googlesource.com/19989

Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Update #14473.

Change-Id: Iba1ecf42d9ab5a93144941439d5cc6b0b4f4a3ac
Reviewed-on: https://go-review.googlesource.com/19992

Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Passes toolstash -cmp.

Update #14473.

Change-Id: I7285175b1992a29033fdc9e81d6f30545e5cc30d
Reviewed-on: https://go-review.googlesource.com/19967

Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

By using a Pragma bit set (8 bits) rather than 8 booleans, also
reduce Func type size by 8 bytes (208B -> 200B on 64bit platforms,
116B -> 108B on 32bit platforms).

Change-Id: Ibb7e1f8c418a0b5bc6ff813cbdde7bc6f0013b5a
Reviewed-on: https://go-review.googlesource.com/19966

Reviewed-by: Dave Cheney <dave@cheney.net>

A slice uses less memory than a NodeList, and has better memory locality
when walking the list.

This uncovered a tricky case involving closures: the escape analysis
pass when run on a closure was appending to the Dcl list of the OCLOSURE
rather than the ODCLFUNC.  This happened to work because they shared the
same NodeList.  Fixed with a change to addrescapes, and a check to
Tempname to catch any recurrences.

This removes the last use of the listsort function outside of tests.
I'll send a separate CL to remove it.

Unfortunately, while this passes all tests, it does not pass toolstash
-cmp.  The problem is that cmpstackvarlt does not fully determine the
sort order, and the change from listsort to sort.Sort, while generally
desirable, produces a different ordering.  I could stage this by first
making cmpstackvarlt fully determined, but no matter what toolstash -cmp
is going to break at some point.

In my casual testing the compiler is 2.2% faster.

Update #14473.

Change-Id: I367d66daa4ec73ed95c14c66ccda3a2133ad95d5
Reviewed-on: https://go-review.googlesource.com/19919

Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Don't accumulate a massive list of Prog structs during
compilation and write them all out at the end of compilation.
Instead, convert them to code+relocs (or data+relocs) after each
function is compiled.

Track down a few other places that were keeping Progs alive
and nil them out so the Progs get GCd promptly.

Saves ~20% in peak memory usage for the compiler.  Surprisingly not much
help speed-wise (only because we end up doing more GCs.  With a
compensating GOGC=120, it does help a bit), but this provides a base for
more changes (e.g. reusing a cache of Progs).

Change-Id: I838e01017c228995a687a8110d0cd67bf8596407
Reviewed-on: https://go-review.googlesource.com/19867


Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Move test for isblank into addmethod so that most of the type checking
for methods is also performed for blank methods.

Fixes #11366.

Change-Id: I13d554723bf96d906d0b3ff390d7b7c87c1a5020
Reviewed-on: https://go-review.googlesource.com/16866

Reviewed-by: Robert Griesemer <gri@golang.org>

allocm is a very unusual function: it is specifically designed to
allocate in contexts where m.p is nil by temporarily taking over a P.
Since allocm is used in many contexts where it would make sense to use
nowritebarrierrec, this commit teaches the nowritebarrierrec analysis
to stop at allocm.

Updates #10600.

Change-Id: I8499629461d4fe25712d861720dfe438df7ada9b
Reviewed-on: https://go-review.googlesource.com/17005

Reviewed-by: Russ Cox <rsc@golang.org>

This introduces a recursive variant of the go:nowritebarrier
annotation that prohibits write barriers not only in the annotated
function, but in all functions it calls, recursively. The error
message gives the shortest call stack from the annotated function to
the function containing the prohibited write barrier, including the
names of the functions and the line numbers of the calls.

To demonstrate the annotation, we apply it to gcmarkwb_m, the write
barrier itself.

This is a new annotation rather than a modification of the existing
go:nowritebarrier annotation because, for better or worse, there are
many go:nowritebarrier functions that do call functions with write
barriers. In most of these cases this is benign because the annotation
was conservative, but it prohibits simply coopting the existing
annotation.

Change-Id: I225ca483c8f699e8436373ed96349e80ca2c2479
Reviewed-on: https://go-review.googlesource.com/16554

Reviewed-by: Keith Randall <khr@golang.org>

Change-Id: I956e27fa07f16060b8f41b986d991c36557f7c12
Reviewed-on: https://go-review.googlesource.com/16332

Reviewed-by: Keith Randall <khr@golang.org>

Update old c-style comments to look like Go comments. Also replace some
lingering references to old .c files that don't exist anymore.

Change-Id: I72b2407a40fc76c23e9048643e0622fd70b4cf90
Reviewed-on: https://go-review.googlesource.com/16190


Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The binary import/export format is significantly more
compact than the existing textual format. It should
also be faster to read and write (to be measured).

Use -newexport to enable, for instance:
export GO_GCFLAGS=-newexport; make.bash

The compiler can import packages using both the old
and the new format ("mixed mode").

Missing: export info for inlined functions bodies
(performance issue, does not affect correctness).

Disabled by default until we have inlined function
bodies and confirmation of no regression and equality
of binaries.

For #6110.
For #1909.

This change depends on:

   https://go-review.googlesource.com/16220
   https://go-review.googlesource.com/16222

(already submitted) for all.bash to work.

Some initial export data sizes for std lib packages. This data
is without exported functions with inlineable function bodies.

Package                                       old      new    new/old

archive/tar.................................13875.....3883    28%
archive/zip.................................19464.....5046    26%
bufio....................................... 7733.....2222    29%
bytes.......................................10342.....3347    32%
cmd/addr2line.................................242.......26    11%
cmd/api.....................................39305....10368    26%
cmd/asm/internal/arch.......................27732.....7939    29%
cmd/asm/internal/asm........................35264....10295    29%
cmd/asm/internal/flags........................629......178    28%
cmd/asm/internal/lex........................39248....11128    28%
cmd/asm.......................................306.......26     8%
cmd/cgo.....................................40197....10570    26%
cmd/compile/internal/amd64...................1106......214    19%
cmd/compile/internal/arm....................27891.....7710    28%
cmd/compile/internal/arm64....................891......153    17%
cmd/compile/internal/big....................21637.....8336    39%
cmd/compile/internal/gc....................109845....29727    27%
cmd/compile/internal/mips64...................972......168    17%
cmd/compile/internal/ppc64....................972......168    17%
cmd/compile/internal/x86.....................1104......195    18%
cmd/compile...................................329.......26     8%
cmd/cover...................................12986.....3749    29%
cmd/dist......................................477.......67    14%
cmd/doc.....................................23043.....6793    29%
cmd/expdump...................................167.......26    16%
cmd/fix......................................1190......208    17%
cmd/go......................................26399.....5629    21%
cmd/gofmt.....................................499.......26     5%
cmd/internal/gcprog..........................1342......490    37%
cmd/internal/goobj...........................2690......980    36%
cmd/internal/obj/arm........................32740....10057    31%
cmd/internal/obj/arm64......................46542....15364    33%
cmd/internal/obj/mips.......................42140....13731    33%
cmd/internal/obj/ppc64......................42140....13731    33%
cmd/internal/obj/x86........................52732....19015    36%
cmd/internal/obj............................36729....11690    32%
cmd/internal/objfile........................36365....10287    28%
cmd/link/internal/amd64.....................45893....12220    27%
cmd/link/internal/arm.........................307.......96    31%
cmd/link/internal/arm64.......................345.......98    28%
cmd/link/internal/ld.......................109300....46326    42%
cmd/link/internal/ppc64.......................344.......99    29%
cmd/link/internal/x86.........................334......107    32%
cmd/link......................................314.......26     8%
cmd/newlink..................................8110.....2544    31%
cmd/nm........................................210.......26    12%
cmd/objdump...................................244.......26    11%
cmd/pack....................................14248.....4066    29%
cmd/pprof/internal/commands..................5239.....1285    25%
cmd/pprof/internal/driver...................37967.....8860    23%
cmd/pprof/internal/fetch....................30962.....7337    24%
cmd/pprof/internal/plugin...................47734.....7719    16%
cmd/pprof/internal/profile..................22286.....6922    31%
cmd/pprof/internal/report...................31187.....7838    25%
cmd/pprof/internal/svg.......................4315......965    22%
cmd/pprof/internal/symbolizer...............30051.....7397    25%
cmd/pprof/internal/symbolz..................28545.....6949    24%
cmd/pprof/internal/tempfile.................12550.....3356    27%
cmd/pprof.....................................563.......26     5%
cmd/trace....................................1455......636    44%
cmd/vendor/golang.org/x/arch/arm/armasm....168035....64737    39%
cmd/vendor/golang.org/x/arch/x86/x86asm.....26871.....8578    32%
cmd/vet.....................................38980.....9913    25%
cmd/vet/whitelist.............................102.......49    48%
cmd/yacc.....................................2518......926    37%
compress/bzip2...............................6326......129     2%
compress/flate...............................7069.....2541    36%
compress/gzip...............................20143.....5069    25%
compress/lzw..................................828......295    36%
compress/zlib...............................10676.....2692    25%
container/heap................................523......181    35%
container/list...............................3517......740    21%
container/ring................................881......229    26%
crypto/aes....................................550......187    34%
crypto/cipher................................1966......825    42%
crypto.......................................1836......646    35%
crypto/des....................................632......235    37%
crypto/dsa..................................18718.....5035    27%
crypto/ecdsa................................23131.....6097    26%
crypto/elliptic.............................20790.....5740    28%
crypto/hmac...................................455......186    41%
crypto/md5...................................1375......171    12%
crypto/rand.................................18132.....4748    26%
crypto/rc4....................................561......240    43%
crypto/rsa..................................22094.....6380    29%
crypto/sha1..................................1416......172    12%
crypto/sha256.................................551......238    43%
crypto/sha512.................................839......378    45%
crypto/subtle................................1153......250    22%
crypto/tls..................................58203....17984    31%
crypto/x509/pkix............................29447.....8161    28%
database/sql/driver..........................3318.....1096    33%
database/sql................................11258.....3942    35%
debug/dwarf.................................18416.....7006    38%
debug/elf...................................57530....21014    37%
debug/gosym..................................4992.....2058    41%
debug/macho.................................23037.....6538    28%
debug/pe....................................21063.....6619    31%
debug/plan9obj...............................2467......802    33%
encoding/ascii85.............................1523......360    24%
encoding/asn1................................1718......527    31%
encoding/base32..............................2642......686    26%
encoding/base64..............................3077......800    26%
encoding/binary..............................4727.....1040    22%
encoding/csv................................12223.....2850    23%
encoding......................................383......217    57%
encoding/gob................................37563....10113    27%
encoding/hex.................................1327......390    29%
encoding/json...............................30897.....7804    25%
encoding/pem..................................595......200    34%
encoding/xml................................37798.....9336    25%
errors........................................274.......36    13%
expvar.......................................3155.....1021    32%
flag........................................19860.....2849    14%
fmt..........................................3137.....1263    40%
go/ast......................................44729....13422    30%
go/build....................................16336.....4657    29%
go/constant..................................3703......846    23%
go/doc.......................................9877.....2807    28%
go/format....................................5472.....1575    29%
go/importer..................................4980.....1301    26%
go/internal/gccgoimporter....................5587.....1525    27%
go/internal/gcimporter.......................8979.....2186    24%
go/parser...................................20692.....5304    26%
go/printer...................................7015.....2029    29%
go/scanner...................................9719.....2824    29%
go/token.....................................7933.....2465    31%
go/types....................................64569....19978    31%
hash/adler32.................................1176......176    15%
hash/crc32...................................1663......360    22%
hash/crc64...................................1587......306    19%
hash/fnv.....................................3964......260     7%
hash..........................................591......278    47%
html..........................................217.......74    34%
html/template...............................69623....12588    18%
image/color/palette...........................315.......98    31%
image/color..................................5565.....1036    19%
image/draw...................................6917.....1028    15%
image/gif....................................8894.....1654    19%
image/internal/imageutil.....................9112.....1476    16%
image/jpeg...................................6647.....1026    15%
image/png....................................6906.....1069    15%
image.......................................28992.....6139    21%
index/suffixarray...........................17106.....4773    28%
internal/singleflight........................1614......506    31%
internal/testenv............................12212.....3152    26%
internal/trace...............................2762.....1323    48%
io/ioutil...................................13502.....3682    27%
io...........................................6765.....2482    37%
log.........................................11620.....3317    29%
log/syslog..................................13516.....3821    28%
math/big....................................21819.....8320    38%
math/cmplx...................................2816......438    16%
math/rand....................................2317......929    40%
math.........................................7511.....2444    33%
mime/multipart..............................12679.....3360    27%
mime/quotedprintable.........................5458.....1235    23%
mime.........................................6076.....1628    27%
net/http/cgi................................59796....17173    29%
net/http/cookiejar..........................14781.....3739    25%
net/http/fcgi...............................57861....16426    28%
net/http/httptest...........................84100....24365    29%
net/http/httputil...........................67763....18869    28%
net/http/internal............................6907......637     9%
net/http/pprof..............................57945....16316    28%
net/http....................................95391....30210    32%
net/internal/socktest........................4555.....1453    32%
net/mail....................................14481.....3608    25%
net/rpc/jsonrpc.............................33335......988     3%
net/rpc.....................................79950....23106    29%
net/smtp....................................57790....16468    28%
net/textproto...............................11356.....3248    29%
net/url......................................3123.....1009    32%
os/exec.....................................20738.....5769    28%
os/signal.....................................437......167    38%
os..........................................24875.....6668    27%
path/filepath...............................11340.....2826    25%
path..........................................778......285    37%
reflect.....................................15469.....5198    34%
regexp......................................13627.....4661    34%
regexp/syntax................................5539.....2249    41%
runtime/debug................................9275.....2322    25%
runtime/pprof................................1355......477    35%
runtime/race...................................39.......17    44%
runtime/trace.................................228.......92    40%
runtime.....................................13498.....1821    13%
sort.........................................2848......842    30%
strconv......................................2947.....1252    42%
strings......................................7983.....2456    31%
sync/atomic..................................2666.....1149    43%
sync.........................................2568......845    33%
syscall.....................................81252....38398    47%
testing/iotest...............................2444......302    12%
testing/quick...............................18890.....5076    27%
testing.....................................16502.....4800    29%
text/scanner.................................6849.....2052    30%
text/tabwriter...............................6607.....1863    28%
text/template/parse.........................22978.....6183    27%
text/template...............................64153....11518    18%
time........................................12103.....3546    29%
unicode......................................9706.....3320    34%
unicode/utf16................................1055......148    14%
unicode/utf8.................................1118......513    46%
vendor/golang.org/x/net/http2/hpack..........8905.....2636    30%

All packages                              3518505  1017774    29%

Change-Id: Id657334f276383ff1e6fa91472d3d1db5a03349c
Reviewed-on: https://go-review.googlesource.com/13937


Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Chris Manghane <cmang@golang.org>

Remove another use of NodeList.

Change-Id: Ice07eff862caf715f722dec7829006bf71715b07
Reviewed-on: https://go-review.googlesource.com/15432

Reviewed-by: Dave Cheney <dave@cheney.net>

This one of a set of changes to make the transition away from NodeList
easier by removing cases in which NodeList doesn't act semi-trivially like a
[]*Node.

This CL was originally prepared by Josh Bleecher Snyder <josharian@gmail.com>.

This change passes go build -toolexec 'toolstash -cmp' -a std.

Change-Id: Ifd73501e06e8ea5efd028b6d473b3e5d1b07a5ac
Reviewed-on: https://go-review.googlesource.com/14570

Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Found with https://github.com/remyoudompheng/go-misc/deadcode:

deadcode: walk.go:2228:1: applywritebarrier_bv is unused
deadcode: subr.go:355:1: gethunk is unused
deadcode: subr.go:1991:1: localexpr is unused
deadcode: dcl.go:82:1: poptodcl is unused
deadcode: swt.go:810:1: dumpcase is unused
deadcode: esc.go:251:1: satAdd8 is unused
deadcode: esc.go:387:1: outputsPerTag is unused
deadcode: obj.go:190:1: duint64 is unused
deadcode: obj.go:287:1: dstringptr is unused
deadcode: plive.go:95:1: xmalloc is unused
deadcode: plive.go:119:1: freeblock is unused

followed by

deadcode: go.go:633:1: hunk is unused
deadcode: go.go:635:1: nhunk is unused
deadcode: go.go:637:1: thunk is unused

after 'gethunk' was removed.

Some dead code in bv.go, mparith3.go, and dcl.go was left as is.

Passes go build -a -toolexec 'toolstash -cmp' std cmd.

Change-Id: Ia63519adedc8650d7095572ddd454fd923d3204d
Reviewed-on: https://go-review.googlesource.com/14610

Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Convert some fields of struct Type in go.go from uint8 to bool.

This change passes go build -toolexec 'toolstash -cmp' -a std.

Change-Id: I0a6c53f8ee686839b5234010ee2de7ae3940d499
Reviewed-on: https://go-review.googlesource.com/14370


Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Convert Type.Broke from a uint8 to a boolean

This change passes go build -toolexec 'toolstash -cmp' -a std.

Change-Id: I44e7548c71b00467e36576bdf62933c42555a21a
Reviewed-on: https://go-review.googlesource.com/14307


Run-TryBot: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Håvard Haugen <havard.haugen@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: Ib3960321a4c8164f6b221bfd15977d2f34dbc65b
Reviewed-on: https://go-review.googlesource.com/14175

Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This helps vet see a real issue:

    cmd/internal/gc$ go vet
    gen.go:1223: unreachable code

Fixes #12106.

Change-Id: I720868b07ae6b6d5a4dc6b238baa8c9c889da6d8
Reviewed-on: https://go-review.googlesource.com/14083

Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This is mostly Russ's https://golang.org/cl/12145 but with some extra fixes to
account for the fact that function declarations without implementations now
break shared libraries, and including my test case.

Fixes #11480.

Change-Id: Iabdc2934a0378e5025e4e7affadb535eaef2c8f1
Reviewed-on: https://go-review.googlesource.com/12340

Reviewed-by: Ian Lance Taylor <iant@golang.org>

This reverts commit 3b411bf1a1bb08d6868083981cecba8088dc7aea.

Change-Id: I321a43fa378a43b3e4d7aa97e0222775640af64b
Reviewed-on: https://go-review.googlesource.com/12205

Reviewed-by: Russ Cox <rsc@golang.org>

These used to be defined at use, but that breaks when shared libraries
are involved.

For #11480.

Change-Id: I416a848754fb615c0d75f9f0ccc00723d07f7f01
Reviewed-on: https://go-review.googlesource.com/12145

Reviewed-by: Rob Pike <r@golang.org>

$ sizeof -p cmd/compile/internal/gc Node
Node 144
$

Change-Id: I688e3790964fe42f48c19f697ec38094a92fe1c1
Reviewed-on: https://go-review.googlesource.com/10531

Reviewed-by: Ian Lance Taylor <iant@golang.org>

$ sizeof -p cmd/compile/internal/gc Node
Node 168
$

Change-Id: I7decd950fe068c0f294c6c9bff07ef809c394429
Reviewed-on: https://go-review.googlesource.com/10534

Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

$ sizeof -p cmd/compile/internal/gc Node
Node 168
$

Change-Id: If624a2d72ec04ef30a1bc7ce76c0d61a526d8a37
Reviewed-on: https://go-review.googlesource.com/10532

Reviewed-by: Ian Lance Taylor <iant@golang.org>

$ sizeof -p cmd/compile/internal/gc Node
Node 176
$

Change-Id: Ibf1ab531a60d4af8a0c242c0e504f4fd50cd5b36
Reviewed-on: https://go-review.googlesource.com/10530

Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>