The actual values assigned to tokens was inherited from the yacc-based
grammar. With the most recent cleanups, all single-char tokens such as
commas, semis, parens, etc., that get returned from lexer.next simply
as their Unicode values are below utf8.RuneSelf (i.e., 7bit ASCII).
Lower the initial starting value for named token constants accordingly.
Change-Id: I7eb8e584dbb3bc7f9dab849d1b68a91320cffebd
Reviewed-on: https://go-review.googlesource.com/19913
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
If the parsing of an operand completes but the parser thinks there
is more to read, return an "expected end of operand" error message
instead of "expected EOF." This also removes extra "asm: " prefixes
in error strings since "asm: " is already set as the global log
prefix.
Fixes#14071
Change-Id: I7d621c1aea529a0eca3bcba032359bd25b3e1080
Reviewed-on: https://go-review.googlesource.com/19731
Reviewed-by: Rob Pike <r@golang.org>
The @ directive used to read the target block after some value
structure had already changed. I don't think it was ever really
a bug, but it's confusing.
It might fail like this:
(Foo x y) -> @v.Args[0].Block (Bar y (Baz ...))
v.Op = Bar
v.Args[0] = y
v.Args[1] = v.Args[0].Block.NewValue(Baz, ...)
That new value is allocated in the block of y, not the
block of x.
Anyway, read the destination block first so this
potential bug can't happen.
Change-Id: Ie41d2fc349b35cefaa319fa9327808bcb781b4e2
Reviewed-on: https://go-review.googlesource.com/19900
Run-TryBot: Todd Neal <todd@tneal.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Todd Neal <todd@tneal.org>
Only tests do this, provide them a hook to disable freeing
after flush.
Change-Id: I810c6c51414a93f476a18ba07b807e16092bf8cf
Reviewed-on: https://go-review.googlesource.com/19907
Reviewed-by: Keith Randall <khr@golang.org>
Not every Android contains the /system/framework directory, e.g. Brillo.
Test against other Android-only system files.
Fixes#14489.
Change-Id: I6d9ec1c4d4ceba3803798015e6917d59cf515de8
Reviewed-on: https://go-review.googlesource.com/19904
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Burcu Dogan <jbd@google.com>
Run-TryBot: Burcu Dogan <jbd@google.com>
TryBot-Result: Gobot Gobot <gobot@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>
In CL 14408, the implementation of duffzero on amd64
was changed to replace the use of the MOVQ instructions
by MOVUPS.
However, it broke the build on plan9/amd64, since
Plan 9 doesn't allow floating point in note handler.
This change disables the use of duffzero on Plan 9.
We also take care to not use the MOVUPS instruction.
Fixes#14471.
Change-Id: I8277b485dfe65a68d7d8338e52a048c5d45069bf
Reviewed-on: https://go-review.googlesource.com/19890
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
In regalloc, make LoadReg instructions use the line number
of their *use*, not their *source*. This reduces the
tendency of debugger stepping to "jump around" the program.
Change-Id: I59e2eeac4dca9168d8af3a93effbc5bdacac2881
Reviewed-on: https://go-review.googlesource.com/19836
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Further reduces complexity of lexer.next which is now readable.
Also removes the need to initialize various local variables in
each next call even if they are not used for the current token.
No measurable performance change for `time go build -a net/http`
(best of 5 runs): difference < 0.3% (in the noise).
Change-Id: I0d74caa2768920af1ceee027e0f46595119d4210
Reviewed-on: https://go-review.googlesource.com/19865
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Helps keep line numbers around for debugging, particularly
for break and continue statements (which often compile
down to nothing).
Update #14379
Change-Id: I6ea06aa887b0450d9ba4f11e319e5c263f5a98ba
Reviewed-on: https://go-review.googlesource.com/19848
Reviewed-by: David Chase <drchase@google.com>
Fixes#14377
Change-Id: I130a6e1b8bc827db44efd0a74e759b894ecc4977
Reviewed-on: https://go-review.googlesource.com/19823
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This change adds support for Fortran files (.f, .F, .for, .f90) to the
go tool, in a similar fashion to Objective-C/C++. Only gfortran is
supported out of the box so far but leaves other Fortran compiler
toolchains the ability to pass the correct link options via CGO_LDFLAGS.
A simple test (misc/cgo/fortran) has been added and plugged into the
general test infrastructure. This test is only enabled when the $FC
environment variable is defined (or if 'gfortran' was found in $PATH.)
Derived from CL 4114.
Change-Id: Ifc855091942f95c6e9b17d91c17ceb4eee376408
Reviewed-on: https://go-review.googlesource.com/19670
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
According to golang.org/pkg/testing the first character after Test has
to be non-lowercase. Functions that don't conform to this are not
considered tests and are not loaded which can cause surprises.
This change adds a check to warn about Test-like functions in a _test
file that are not actually run by go test.
Moved over from https://go-review.googlesource.com/#/c/19466/
Change-Id: I2f89676058b27a0e35f721bdabc9fa8a9d34430d
Reviewed-on: https://go-review.googlesource.com/19724
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
Saves about 2k for binaries in pkg/tool/linux_amd64.
Also useful when opt runs after cse (as in 12960) which reorders
arguments for commutative operations such as Add64.
Change-Id: I49ad53afa53db9736bd35c425f4fb35fb511fd63
Reviewed-on: https://go-review.googlesource.com/19827
Run-TryBot: Alexandru Moșoi <alexandru@mosoi.ro>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Always reading runes (rather than bytes) has negligible overhead
(a simple if at the moment - it can be eliminated eventually) but
simplifies the lexer logic and opens up the door for speedups.
In the process remove many int conversions that are now not needed
anymore.
Also, because identifiers are now more easily recognized, remove
talph label and move identifier lexing "in place".
Also, instead of accepting all chars < 0x80 and then check for
"frogs", only permit valid characters in the first place. Removes
an extra call for common simple tokens and leads to simpler logic.
`time go build -a net/http` (best of 5 runs) seems 1% faster.
Assuming this is in the noise, there is no noticeable performance
degradation with this change.
Change-Id: I3454c9bf8b91808188cf7a5f559341749da9a1eb
Reviewed-on: https://go-review.googlesource.com/19847
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This change renames {ipraw,tcp,udp,unix}_test.go to
{ipraw,tcp,udp,unix}sock_test.go for clarification. Also moves
NSS-related system configuration test helpers into main_conf_test.go and
main_noconf_test.go.
Change-Id: I28ba1e8ceda7b182ee3aa85f0ca3321388ba45e2
Reviewed-on: https://go-review.googlesource.com/19787
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Like bionic, musl also doesn't provide vsyscall helper in %gs:0x10,
and as int $0x80 is as fast as calling %gs:0x10, just use int $0x80
always.
Because we're no longer using vsyscall in VDSO, get rid of VDSO code
for linux/386 too.
Fixes#14476.
Change-Id: I00ec8652060700e0a3c9b524bfe3c16a810263f6
Reviewed-on: https://go-review.googlesource.com/19833
Run-TryBot: Minux Ma <minux@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Bump up the multiplier to 20. Also run the fast version first, so that
the slow version is likely to start up faster.
Change-Id: Ia0654cc1212ab03a45da1904d3e4b57d6a8d02a0
Reviewed-on: https://go-review.googlesource.com/19835
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>
This reduces the amount of duplication. Now there is only one list
of platforms supporting cgo.
Update #12270.
Change-Id: I5dcd55cb6be7c5bb6ce560383c71d90ab1189dc9
Reviewed-on: https://go-review.googlesource.com/14278
Run-TryBot: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
After golang.org/cl/19652 removed the bizarre lexlineno{++,--}
statements for parsing canned imports, this hack for #13267 is no
longer necessary:
$ echo -n 0 > /tmp/0.go
$ go tool compile /tmp/0.go
/tmp/0.go:1: syntax error: package statement must be first
Apparently setting lexlineno to 2 while parsing the canned imports
caused prevlineno and lineno to also be set to 2. After we finished
parsing imports and restored lexlineno to 1, since "package" is the
first token in a source file, we'll have fixed lineno = 1, but
prevlineno was still set to 2.
Change-Id: Ibcc49fe3402264819b9abb53505631f7a0ad4a36
Reviewed-on: https://go-review.googlesource.com/19859
Reviewed-by: Robert Griesemer <gri@golang.org>
When -N, make sure we don't drop every instruction from
a block, even ones which would otherwise be empty.
Helps keep line numbers around for debugging, particularly
for break and continue statements (which often compile
down to nothing).
Fixes#14379
Change-Id: I33722c4f0dcd502f146fa48af262ba3a477c959a
Reviewed-on: https://go-review.googlesource.com/19854
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>
The existing implementation converts the deadline time to an int64,
but does not handle overflow. If the calculated deadline is negative
but the user specified deadline is in the future, then we can assume
the calculation overflowed, and set the deadline to math.MaxInt64.
Fixes#14431
Change-Id: I54dbb4f02bc7ffb9cae8cf62e4e967e9c6541ec6
Reviewed-on: https://go-review.googlesource.com/19758
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Mikio Hara <mikioh.mikioh@gmail.com>
More clearly distinguish between tab-terminated cells
which are part of an (aligned) column, and non-tab terminated
cells which are not part of a column. Added additional examples.
For #14412.
Change-Id: If72607385752e221eaa2518238b11f48fbcb8a90
Reviewed-on: https://go-review.googlesource.com/19855
Reviewed-by: Alan Donovan <adonovan@google.com>
The previous Happy Eyeballs implementation would intentionally leak
connections, because dialTCP could not be reliably terminated upon
losing the race.
Now that dialTCP supports cancelation (plan9 excluded), dialParallel can
wait for responses from both the primary and fallback racers, strictly
before returning control to the caller.
In dial_test.go, we no longer need Sleep to avoid leaks.
Also, fix a typo in the Benchmark IPv4 address.
Updates #11225Fixes#14279
Change-Id: Ibf3fe5c7ac2f7a438c1ab2cdb57032beb8bc27b5
Reviewed-on: https://go-review.googlesource.com/19390
Reviewed-by: Mikio Hara <mikioh.mikioh@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
The () parentheses grouped wrongly. Removed them completely in
favor of separate 2- and 3-index slice alternatives which is
clearer.
Fixes#14477.
Change-Id: I0b7521ac912130d9ea8740b8793b3b88e2609418
Reviewed-on: https://go-review.googlesource.com/19853
Reviewed-by: Ian Lance Taylor <iant@golang.org>
While investigating the differences between 19710 (remove
tautological controls) and 12960 (bounds and nil propagation)
I observed that part of the wins of 19710 come from missed
opportunities for deadcode elimination due to phis.
See for example runtime.stackcacherelease. 19710 happens much
later than 12960 and has more chances to eliminate bounds.
Size of pkg/tool/linux_amd64/* excluding compile:
-this -12960 95882248
+this -12960 95880120
-this +12960 95581512
+this +12960 95555224
This change saves about 25k.
Change-Id: Id2f4e55fc92b71595842ce493c3ed527d424fe0e
Reviewed-on: https://go-review.googlesource.com/19728
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Alexandru Moșoi <alexandru@mosoi.ro>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Found running go vet on the package. It barks that
regexp/backtrack.go:257: unreachable code
regexp/backtrack.go:302: unreachable code
For #11041
Change-Id: I0f5ba0d6183108fba3d144991b826273db0ffb09
Reviewed-on: https://go-review.googlesource.com/19824
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
