Change-Id: Ide50aba940727a7b32cd33dea5315050f1a34717
Reviewed-on: https://go-review.googlesource.com/132237
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Change-Id: Id0e2fb2abad5b776ac0ed76e55e36c6b774b5b7a
Reviewed-on: https://go-review.googlesource.com/132278
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
runtime.wbBufFlush must not modify its arguments, because the
argument slots are also used as spill slots in runtime.gcWriteBarrier.
So, GOEXPERIMENT=clobberdead must not clobber them.
Updates #27326.
Change-Id: Id02bb22a45201eecee748d89e7bdb3df7e4940e4
Reviewed-on: https://go-review.googlesource.com/131957
Reviewed-by: Keith Randall <khr@golang.org>
We now have safepoints at nearly all the instructions. When
GOEXPERIMENT=clobberdead is on, it inserts clobbers nearly at
every instruction. Currently this doesn't work. (Maybe the stack
maps at non-call safepoints are still imprecise. I haven't
investigated.) For now, only use call-based safepoints if the
experiment is on.
Updates #27326.
Change-Id: I72cda9b422d9637cc5738e681502035af7a5c02d
Reviewed-on: https://go-review.googlesource.com/131956
Reviewed-by: Keith Randall <khr@golang.org>
The current implementation crashes when someone writes a panic outside of
a function, which makes sense since that is broken code. This fix allows
one to type-check broken code.
Updates #22467
Change-Id: I81b90dbd918162a20c60a821340898eaf02e648d
Reviewed-on: https://go-review.googlesource.com/132235
Reviewed-by: Alan Donovan <adonovan@google.com>
The sym.Symbol 'ElfType' field is used only for symbols corresponding
to things in imported shared libraries, hence is not needed in the
common case. Relocate it to sym.AuxSymbol so as to shrink the main
Symbol struct.
Updates #26186
Change-Id: I803efc561c31a0ca1d93eca434fda1c862a7b2c5
Reviewed-on: https://go-review.googlesource.com/125479
Reviewed-by: Ian Lance Taylor <iant@golang.org>
The sym.Symbol 'Plt' and 'Got' field are used only with cgo and/or
external linking and are not needed for most symbols. Relocate them to
sym.AuxSymbol so as to shrink the main Symbol struct.
Updates #26186
Change-Id: I170d628a760be300a0c1f738f0998970e91ce3d6
Reviewed-on: https://go-review.googlesource.com/125478
Reviewed-by: Ian Lance Taylor <iant@golang.org>
The sym.Symbol 'Localentry' field is used only with cgo and/or
external linking on MachoPPC. Relocate it to sym.AuxSymbol since it is
infrequently used, so as to shrink the main Symbol struct.
Updates #26186
Change-Id: I5872aa3f059270c2a091016d235a1a732695e411
Reviewed-on: https://go-review.googlesource.com/125477
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Create a new "AuxSymbol" struct into which 'cold' or 'infrequently
set' symbol fields are located. Move the Extname field from the
main Symbol struct to AuxSymbol.
Updates #26186
Change-Id: I9e795fb0cc48f978e2818475fa073ed9f2db202d
Reviewed-on: https://go-review.googlesource.com/125476
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
The system call geteuid can not work properly on android, which
causes a test case failed on rooted android/arm.
This CL disables the test case on android.
Fixes#27364
Change-Id: Ibfd33ef8cc1dfe8822c8be4280eae12ee30929c1
Reviewed-on: https://go-review.googlesource.com/132175
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Nil check is special in that it has no use but we must keep it.
Count it as a use of the auto.
Fixes#27278.
Change-Id: I857c3d0db2ebdca1bc342b4993c0dac5c01e067f
Reviewed-on: https://go-review.googlesource.com/131955
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Fixes#26638.
Change-Id: I3c18d1298d99af8ea8c00916303efd2b5a5effc7
Reviewed-on: https://go-review.googlesource.com/126336
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
bytes.NewBuffer's documentation says it can be used to set the initial
size of the buffer. The current wording is:
> It can also be used to size the internal buffer for writing.
This may led users to believe that the buffer (its backing array) is
fixed in size and won't grow, which isn't true (subsequent Write calls
will expand the backing array as needed).
Change the doc to make it clearer that NewBuffer just sets the initial
size of the buffer.
Fixes#27242
Change-Id: I2a8cb5bee02ca2c1657ef59e2cf1434c7a9bd397
Reviewed-on: https://go-review.googlesource.com/132035
Reviewed-by: Dominik Honnef <dominik@honnef.co>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
lexRawQuote already uses the next method, which keeps track of newlines
on a character by character basis. Adding up newlines in emit again
results in the newlines being counted twice, which can mean bad position
information in error messages.
Fix that, and add a test.
Fixes#27319.
Change-Id: Id803be065c541412dc808d388bc6d8a86a0de41e
Reviewed-on: https://go-review.googlesource.com/131996
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
When generation DWARF inline info records, the current implementation
includes a sorting pass that reorders a subprogram's child variable
DIEs based on class (param/auto) and name. This sorting is no longer
needed, and can cause problems for a debugger (if we want to use the
DWARF info for creating a call to an optimized function); this patch
removes it.
Ordering of DWARF subprogram variable/parameter DIEs is still
deterministic with this change, since it is keyed off the order in
which vars appear in the pre-inlining function "Dcl" list.
Updates #27039
Change-Id: I3b91290d11bb3b9b36fb61271d80b801841401ee
Reviewed-on: https://go-review.googlesource.com/131895
Reviewed-by: Heschi Kreinick <heschi@google.com>
Lookup is not supported on android, and the test
syscall/exec_linux_test.go which relies on it will fail on
android/arm64.
Fixes#27327
Change-Id: I6fdb8992d4634ac7e3689360ff114e9431b5e90c
Reviewed-on: https://go-review.googlesource.com/131995
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Moves type name mangling after deadcode elimination. The motivation for
doing this is to create a space between deadcode elimination and type name
mangling where DWARF generation for types and variables can exist, to fix
issue #23733.
Change-Id: I9db8ecc0f4efe3df6c1e4025f02642fd452f9a39
Reviewed-on: https://go-review.googlesource.com/111236
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This fixes the unwanted behaviour where printing a zero float with the
#v fmt verb outputs "0" - e.g. missing the trailing decimal. This means
that the output would be interpreted as an int rather than a float when
parsed as Go source. After this change the the output is "0.0".
Fixes#26363
Change-Id: Ic5c060522459cd5ce077675d47c848b22ddc34fa
GitHub-Last-Rev: adfb061363
GitHub-Pull-Request: golang/go#26383
Reviewed-on: https://go-review.googlesource.com/123956
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Rob Pike <r@golang.org>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This patch contains the remnants of CL (122482), which was intended to
reduce memory allocation in 'relocsym'. Another CL (113637) went in
first that included pretty much all of the code changes in 122482,
however there are some changes to comments that are worth preserving.
Change-Id: Iacdbd2bfe3b7ca2656596570f06ce9a646211913
Reviewed-on: https://go-review.googlesource.com/122482
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Comment changes to fix typos, no code changes.
Change-Id: I6c915f183025587fc479d14f5d2c885767348b1b
Reviewed-on: https://go-review.googlesource.com/131615
Reviewed-by: Ian Lance Taylor <iant@golang.org>
After CL 130736 there are no empty function declarations this package
anymore, so empty.s is no longer needed.
Change-Id: Ic4306f10ad8a31777a3337870ce19e14c1510f3b
Reviewed-on: https://go-review.googlesource.com/131835
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Change-Id: Ibef5f96ea588d17eac1c96ee3992e01943ba0fef
Reviewed-on: https://go-review.googlesource.com/131496
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Strip a trailing "le" from the GOARCH value when calculating the GOxxx
environment variable that affects it.
Fixes#27260
Change-Id: I081f30d5dc19281901551823f4f56be028b5f71a
Reviewed-on: https://go-review.googlesource.com/131379
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Some indexed load/store rules lack of type information, and this
CL adds that for them.
Change-Id: Icac315ccb83a2f5bf30b056d4667d5b59eb4e5e2
Reviewed-on: https://go-review.googlesource.com/128455
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
The race detector is not fully functional on NetBSD yet. Without
this change, all.bash fails in TestOutput.
This unbreaks the netbsd-amd64 builder.
Update #26403Fixes#27268
Change-Id: I2c7015692d3632aa1037f40155d4fc5c7bb1d8c3
Reviewed-on: https://go-review.googlesource.com/131555
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
In the compiler frontend, walkinrange indiscriminately calls Int64()
on const CTINT nodes, even though Int64's return value is undefined
for anything over 2⁶³ (in practise, it'll return a negative number).
This causes the introduction of bad constants during rewrites of
unsigned expressions, which make the compiler reject valid Go
programs.
This change introduces a preliminary check that Int64() is safe to
call on the consts on hand. If it isn't, walkinrange exits without
doing any rewrite.
Fixes#27143
Change-Id: I2017073cae65468a521ff3262d4ea8ab0d7098d9
Reviewed-on: https://go-review.googlesource.com/130735
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Given the following types:
type S2 struct{ Field string }
type S struct{ *S2 }
Marshalling a value of type T1 should result in "{}", as there's no way
to access any value of T2.Field. This is how Go 1.10 and earlier
versions behave.
However, in the recent refactor golang.org/cl/125417 I broke this logic.
When the encoder found an anonymous struct pointer field that was nil,
it no longer skipped the embedded fields underneath it. This can be seen
in the added test:
--- FAIL: TestAnonymousFields/EmbeddedFieldBehindNilPointer (0.00s)
encode_test.go:430: Marshal() = "{\"Field\":\"\\u003c*json.S2 Value\\u003e\"}", want "{}"
The human error was a misplaced label, meaning we weren't actually
skipping the right loop iteration. Fix that.
Change-Id: Iba8a4a77d358dac73dcba4018498fe4f81afa263
Reviewed-on: https://go-review.googlesource.com/131376
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TestRawMessage now passes without the need for the RawMessage field to
be a pointer. The TODO dates all the way back to 2010, so I presume the
issue has since been fixed.
TestNullRawMessage tested the decoding of a JSON null into a
*RawMessage. The existing behavior was correct, but for the sake of
completeness a non-pointer RawMessage field has been added too. The
non-pointer field behaves differently, as one can read in the docs:
To unmarshal JSON into a value implementing the Unmarshaler
interface, Unmarshal calls that value's UnmarshalJSON method,
including when the input is a JSON null.
Change-Id: Iabaed75d4ed10ea427d135ee1b80c6e6b83b2e6e
Reviewed-on: https://go-review.googlesource.com/131377
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This makes the runtime.support_sse2 variable unused
so it is removed in this CL too.
Change-Id: Ia8b9ffee7ac97128179f74ef244b10315e44c234
Reviewed-on: https://go-review.googlesource.com/131455
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Encoders like map and array can use the much cheaper "i > 0" check to
see if we're not writing the first element. However, since struct fields
support omitempty, we need to keep track of that separately.
This is much more expensive - after calling the field encoder itself,
and retrieving the field via reflection, this branch was the third most
expensive piece of this field loop.
Instead, hoist the branch logic outside of the loop. The code doesn't
get much more complex, since we just delay the writing of each byte
until the next iteration. Yet the performance improvement is noticeable,
even when the struct types in CodeEncoder only have 2 and 7 fields,
respectively.
name old time/op new time/op delta
CodeEncoder-4 5.39ms ± 0% 5.31ms ± 0% -1.37% (p=0.010 n=4+6)
name old speed new speed delta
CodeEncoder-4 360MB/s ± 0% 365MB/s ± 0% +1.39% (p=0.010 n=4+6)
Updates #5683.
Change-Id: I2662cf459e0dfd68e56fa52bc898a417e84266c2
Reviewed-on: https://go-review.googlesource.com/131401
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
A few encoder struct types, such as map and slice, only encapsulate
other prepared encoder funcs. Using pointer receivers has no advantage,
and makes calling these methods slightly more expensive.
Not a huge performance win, but certainly an easy one. The struct types
used in the benchmark below contain one slice field and one pointer
field.
name old time/op new time/op delta
CodeEncoder-4 5.48ms ± 0% 5.39ms ± 0% -1.66% (p=0.010 n=6+4)
name old speed new speed delta
CodeEncoder-4 354MB/s ± 0% 360MB/s ± 0% +1.69% (p=0.010 n=6+4)
Updates #5683.
Change-Id: I9f78dbe07fcc6fbf19a6d96c22f5d6970db9eca4
Reviewed-on: https://go-review.googlesource.com/131400
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Got error:
'go' is not an internal or external command, nor is it a runnable program
Change-Id: Ie45a3a12252fa01b67ca09ef8fbb5b4bbf728fe7
GitHub-Last-Rev: 451815cacd
GitHub-Pull-Request: golang/go#27214
Reviewed-on: https://go-review.googlesource.com/131397
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
If $WORK happens to contain the string that a stdout/stderr/grep
command is searching for, a negative grep command will fail incorrectly.
Fixes#27170Fixes#27221
Change-Id: I84454d3c42360fe3295c7235d388381525eb85b4
Reviewed-on: https://go-review.googlesource.com/131398
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
