With this change, the shift checking code matches the corresponding
go/types code, but for the differences in the internal error reporting,
and call of check.overflow.
The change leads to the recording of an untyped int value if the RHS
of a non-constant shift is an untyped integer value. Adjust the type
in the compiler's irgen accordingly. Add test/shift3.go to verify
behavior.
Change-Id: I20386fcb1d5c48becffdc2203081fb70c08b282d
Reviewed-on: https://go-review.googlesource.com/c/go/+/398236
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
This CL spill arg registers before calling morestack, unspill
after.
Also, avoid X11,X12,X13 in function prologue, which may carry
live argument value.
Change-Id: I7a2841fbe306f62a7765e212f9f0be5c11ce7f8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/396655
Trust: mzh <mzh@golangcn.org>
Run-TryBot: mzh <mzh@golangcn.org>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
'go tool dist env' outputs different (and fewer) environment variables
than 'go env'. The 'go tool dist env' variables should be
authoritative, whereas many printed by 'go env' are merely
informational (and not intended to be overridden in the actual
environment).
Fixes#52009
Change-Id: Ic0590153875183135cebf7ca55ead7c2b4038569
Reviewed-on: https://go-review.googlesource.com/c/go/+/398061
Trust: Bryan Mills <bcmills@google.com>
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cmd/internal/moddeps is currently failing on the longtest builders
because vendored third-party dependencies were accidentally edited as
part of CL 384262 (a global cleanup of the standard library).
Updates #51082
Change-Id: I6f79c8f1177420a51128ce42d6c14fa5dcc4bd7b
Reviewed-on: https://go-review.googlesource.com/c/go/+/398455
Trust: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
A future change to gofmt will rewrite
// Doc comment.
//go:foo
to
// Doc comment.
//
//go:foo
Apply that change preemptively to all comments (not necessarily just doc comments).
For #51082.
Change-Id: Iffe0285418d1e79d34526af3520b415a12203ca9
Reviewed-on: https://go-review.googlesource.com/c/go/+/384260
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
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go/doc in all its forms applies this replacement when rendering
the comments. We are considering formatting doc comments,
including doing this replacement as part of the formatting.
Apply it to our source files ahead of time.
For #51082.
Change-Id: Ifcc1f5861abb57c5d14e7d8c2102dfb31b7a3a19
Reviewed-on: https://go-review.googlesource.com/c/go/+/384262
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
Cache keys are dumped in case of mismatch; an empty modinfo string
adds noise to that dump without a corresponding benefit.
For #52009.
Change-Id: I1b4cd85fa5ff920973552fc94977954f93622a32
Reviewed-on: https://go-review.googlesource.com/c/go/+/398059
Trust: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
These fields have been parsed as quoted fields since CL 334732,
but we missed the unparsing side in 'go env'.
Certain scripts (notably make.ba{sh,t}) expect to be able to set the
environment to exactly what 'go env' reports, so for round-trip
purposes it is important to match the marshaling and unmarshaling
functions.
(Noticed while debugging #52009.)
Updates #41400
Change-Id: I0ff39b7a6e1328111c285c97cd23f79b723f3c73
Reviewed-on: https://go-review.googlesource.com/c/go/+/398058
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
The SHRX/SHLX instruction can take any general register as the shift count operand, and can read source from memory. This CL introduces some operators to combine load and shift to one instruction.
For #47120
Change-Id: I13b48f53c7d30067a72eb2c8382242045dead36a
Reviewed-on: https://go-review.googlesource.com/c/go/+/385174
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Cherry Mui <cherryyz@google.com>
Now that there's a native go/types importer for unified IR, the
compiler no longer needs to stay backwards compatible with old iexport
importers.
This CL also updates the go/types and go/internal/gcimporter tests to
expect that the unified IR importer sets the receiver parameter type
to the underlying Interface type, rather than the Named type. This is
a temporary workaround until we make a decision on #49906.
Notably, this makes `GOEXPERIMENT=unified go test` work on generics
code without requiring `-vet=off` (because previously cmd/vet was
relying on unified IR's backwards-compatible iexport data, which
omitted generic types).
Change-Id: Iac7a2346bb7a91e6690fb2978fb702fadae5559d
Reviewed-on: https://go-review.googlesource.com/c/go/+/386004
Trust: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Robert Findley <rfindley@google.com>
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Per the spec, "the type sets of all non-interface terms must be
pairwise disjoint (the pairwise intersection of the type sets must
be empty)" in a union.
For the overlap test, the existing implementation casually mixed
syntactic union terms (which may have interface type) with type set
terms (which are normalized/expanded and must not have interface
type). As a consequence, in some cases the overlap test failed.
This change skips terms with interface types in the overlap test.
Fixes#51607.
Change-Id: I8ae9953db31f0a0428389c6a45a6696aa2450219
Reviewed-on: https://go-review.googlesource.com/c/go/+/397695
Trust: Robert Griesemer <gri@golang.org>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
LZCNT is similar to BSR, but BSR(x) is undefined when x == 0, so using
LZCNT can avoid a special case for zero input. Except that case,
LZCNTQ(x) == 63-BSRQ(x) and LZCNTL(x) == 31-BSRL(x).
And according to https://www.agner.org/optimize/instruction_tables.pdf,
LZCNT instructions are much faster than BSR on AMD CPU.
name old time/op new time/op delta
LeadingZeros-8 0.91ns ± 1% 0.80ns ± 7% -11.68% (p=0.000 n=9+9)
LeadingZeros8-8 0.98ns ±15% 0.91ns ± 1% -7.34% (p=0.000 n=9+9)
LeadingZeros16-8 0.94ns ± 3% 0.92ns ± 2% -2.36% (p=0.001 n=10+10)
LeadingZeros32-8 0.89ns ± 1% 0.78ns ± 2% -12.49% (p=0.000 n=10+10)
LeadingZeros64-8 0.92ns ± 1% 0.78ns ± 1% -14.48% (p=0.000 n=10+10)
Change-Id: I125147fe3d6994a4cfe558432780408e9a27557a
Reviewed-on: https://go-review.googlesource.com/c/go/+/396794
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
Run-TryBot: Emmanuel Odeke <emmanuel@orijtech.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This CL add MOVBE support for 16-bit version, but MOVBEWload is
excluded because it does not satisfy zero extented.
For #51724
Change-Id: I3fadf20bcbb9b423f6355e6a1e340107e8e621ac
Reviewed-on: https://go-review.googlesource.com/c/go/+/396617
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
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Trust: Emmanuel Odeke <emmanuel@orijtech.com>
A future change to gofmt will rewrite
// Doc comment.
//
func f()
to
// Doc comment.
func f()
Apply that change preemptively to all doc comments.
For #51082.
Change-Id: I4023e16cfb0729b64a8590f071cd92f17343081d
Reviewed-on: https://go-review.googlesource.com/c/go/+/384259
Trust: Russ Cox <rsc@golang.org>
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For whatever reason (perhaps some tool does this), a handful of comments,
including some doc comments, have TODOs formatted like:
// TODO(name): Text here and
// more text aligned
// under first text.
In doc comments the second line turns into a <pre> block,
which is undesirable in this context.
Rewrite those to unindent, like this instead:
// TODO(name): Text here and
// more text aligned
// at left column.
For #51082.
Change-Id: Ibf5145659a61ebf9496f016752a709a7656d2d4b
Reviewed-on: https://go-review.googlesource.com/c/go/+/384258
Trust: Russ Cox <rsc@golang.org>
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A run of lines that are indented with any number of spaces or tabs
format as a <pre> block. This commit fixes various doc comments
that format badly according to that (standard) rule.
For example, consider:
// - List item.
// Second line.
// - Another item.
Because the - lines are unindented, this is actually two paragraphs
separated by a one-line <pre> block. This CL rewrites it to:
// - List item.
// Second line.
// - Another item.
Today, that will format as a single <pre> block.
In a future release, we hope to format it as a bulleted list.
Various other minor fixes as well, all in preparation for reformatting.
For #51082.
Change-Id: I95cf06040d4186830e571cd50148be3bf8daf189
Reviewed-on: https://go-review.googlesource.com/c/go/+/384257
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
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There was only a placeholder for DC instruction in the previous code.
gVisor needs this instruction. This CL completes its support.
This patch is a copy of CL 250858, contributed by Junchen Li(junchen.li@arm.com).
Co-authored-by: Junchen Li(junchen.li@arm.com)
CustomizedGitHooks: yes
Change-Id: I76098048a227fbd08aa42c4173b028f0ab4f66e8
Reviewed-on: https://go-review.googlesource.com/c/go/+/302851
Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Eric Fang <eric.fang@arm.com>
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There was only a placeholder for TLBI instruction in the previous code.
gVisor needs this instruction. This CL completes its support.
This patch is a copy of CL 250758, contributed by Junchen Li(junchen.li@arm.com).
Co-authored-by: Junchen Li(junchen.li@arm.com)
Change-Id: I69e893d2c1f75e227475de9e677548e14870f3cd
Reviewed-on: https://go-review.googlesource.com/c/go/+/302850
Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Eric Fang <eric.fang@arm.com>
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The previous code treats some operands such as EQ, LT, etc. as special
registers. However, they are not. This CL adds a new AddrType TYPE_SPOPD
and a new class C_SPOPD to support this kind of special operands, and
refactors the relevant code.
This patch is a copy of CL 260861, contributed by Junchen Li(junchen.li@arm.com).
Co-authored-by: Junchen Li(junchen.li@arm.com)
Change-Id: I57b28da458ee3332f610602632e7eda03af435f5
Reviewed-on: https://go-review.googlesource.com/c/go/+/302849
Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Eric Fang <eric.fang@arm.com>
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Currently using the SYS instruction will report the "illegal combination"
error. This is because the assembler parser treats the register operand
as p.To, while optab defines it as p.Reg. This CL fixes this bug.
Change-Id: I57799a7c19934b0c62278948f4efaa41001593a4
Reviewed-on: https://go-review.googlesource.com/c/go/+/396796
Run-TryBot: Eric Fang <eric.fang@arm.com>
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Trust: Eric Fang <eric.fang@arm.com>
The MOV like instructions should only have two operands.
Change-Id: Icbfb49e47a91ac305194c2f140d3d81c912f6d6d
GitHub-Last-Rev: 2b25aaa0ed
GitHub-Pull-Request: golang/go#52073
Reviewed-on: https://go-review.googlesource.com/c/go/+/397175
Run-TryBot: Ben Shi <powerman1st@163.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
The current implementation fails to identify that an argument to go work
use is a file when expecting a directory, and panics when attempting to
access it as a directory. This change checks arguments are directories
and generates an error otherwise.
Fixes#51749
Change-Id: If8f69d233409e93fcf391a8774bace74c031c986
Reviewed-on: https://go-review.googlesource.com/c/go/+/393615
Reviewed-by: Bryan Mills <bcmills@google.com>
Trust: Bryan Mills <bcmills@google.com>
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This fixes a failure mode observed in
https://build.golang.org/log/7b28a914b1914dabe94f7c4e36ad6466ebd4de5d,
in which the expected CONT lines are present but the test completions
are reported in a different (but valid) order.
CONT lines are only printed between interleaved output lines, so if
the ordering of the tests swaps after all output is already generated
the PASS lines can be in arbitrary order.
Fixes#51221 (again).
Change-Id: I051f8ec4331e2e3ab1bb00a7c188c322ad4e0a03
Reviewed-on: https://go-review.googlesource.com/c/go/+/397194
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
This fixes two independent problems:
We normally propagate desired registers backwards through opcodes that
are marked resultInArg0. Unfortunately for the desired register
computation, ADDQconst is not marked as resultInArg0. This is because
the amd64 backend can write it out as LEAQ instead if the input and
output registers don't match. For desired register purposes, we want
to treat ADDQconst as resultInArg0, so that we get an ADDQ instead of
a LEAQ if we can.
Desired registers don't currently work for tuple-generating opcodes.
Declare that the desired register applies to the first element of the
tuple, and propagate the desired register back through Select0.
Noticed when fixing #51964
Change-Id: I83346b988882cd58c2d7e7e5b419a2b9a244ab66
Reviewed-on: https://go-review.googlesource.com/c/go/+/396035
Trust: Keith Randall <khr@golang.org>
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When doing external linking on windows, the existing Go linker code
assumed that the external linker defaulted to "--no-dynamicbase" (if
no explicit option was given). This assumption doesn't hold for LLD,
which turns on "--dynamicbase" by default for 64-bit apps. Change the
linker to detect whether a more modern toolchain is in use and to
explicitly pass "--dynamicbase" either way , so as to take the
external linker default out of the equation. This also applies to the
"--high-entropy-va" option as well.
Updates #35006.
Change-Id: I3e12cf6d331c9d003e3d2bd566d45de5710588b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/384156
Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Than McIntosh <thanm@google.com>
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Tweak the cgo recipe for the TestCgoHandlesWlORIGIN testpoint to avoid
using "-rpath" on Windows, where it doesn't make sense to use it. This
change needed to avoid an "unknown flag -rpath" from clang/ldd on
windows.
Updates #35006.
Change-Id: I4fcd649df4687aa3aff5690e11a15fc0e0f42332
Reviewed-on: https://go-review.googlesource.com/c/go/+/384155
Reviewed-by: Bryan Mills <bcmills@google.com>
Trust: Than McIntosh <thanm@google.com>
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BSWAP does not affect EFLAGS on neither 386 nor x64. Set the clobberFlags value accordingly.
Change-Id: Ib9e88400607fea44bb51fe95dc4d77e7cb54bfec
Reviewed-on: https://go-review.googlesource.com/c/go/+/391494
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
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Trust: Ian Lance Taylor <iant@golang.org>
Currently, in most cases the compiler generates a func value
symbol when it is referenced, except when building a shared object
it generates the func value symbol when the function is declared.
The comment says this was necessary because we cannot deduplicate
DUPOK symbols across DSO boundaries. But the dynamic linker is
just fine to resolve symbols with the same name across DSO
boundaries.
Another problem may be that the address of the PLT stub may be
used. When such a func value is deferred, when the runtime needs
to scan its arguments, it cannot look up the PC to find the
function and therefore cannot find its stack map. This is not a
problem now as deferred functions always have no arguments.
Remove the special case for shared linkage.
Change-Id: Id7df0b0ada6d3d7f85741a9ab09581975509516c
Reviewed-on: https://go-review.googlesource.com/c/go/+/396534
Trust: Cherry Mui <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
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Add some rudimentary support to the PE file loader for handling
sections in COMDAT when reading host object files. This is needed
in order to link programs with support libraries that are of a more
modern vintage than GCC 5.X.
If a given section XYZ is in COMDAT, the symbol for that section will
be flagged, e.g. section 'Characteristics' field will have the
IMAGE_SCN_LNK_COMDAT bit set, and the symbol will be followed by an
"aux" symbol that includes the COMDAT handling strategy that the
linker needs to use.
This patch supports two COMDAT strategies (IMAGE_COMDAT_SELECT_ANY and
IMAGE_COMDAT_SELECT_SAME_SIZE); more work will have to be done in the
future to support other flavors if it turns out that they are needed.
Updates #35006.
Change-Id: I516e825c30ed3df94ba08323b8a24fb847e10c1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/383835
Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
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When doing an internal link on Windows, it's possible to see
unresolved references to the symbols "__CTOR_LIST__" and/or
"__DTOR_LIST__" (which are needed in some circumstances). If these are
still unresolved at the point where we're done reading host objects,
then synthesize dummy versions of them.
Updates #35006.
Change-Id: I408bf18499bba05752710cf5a41621123bd84a3b
Reviewed-on: https://go-review.googlesource.com/c/go/+/383836
Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
The spec says "In a union, a term cannot be a type parameter,...",
but it's really the type in a term that cannot be a type parameter.
(Also, for the spec's purposes, a single term is still a union.)
This CL changes the current error message from:
"cannot use type parameter in typeset"
to one of two messages:
"term cannot be a type parameter" (for term of form P)
"type in term ~P cannot be a type parameter (for term of form ~P)
which are more specific and match the spec more closely.
Fixes#50420.
Change-Id: Id48503efc8416cabc03d5c40d8e64d5b3a7f078e
Reviewed-on: https://go-review.googlesource.com/c/go/+/396874
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
For Windows internal linking with CGO, when using more modern
LLVM-based compilers, we may need to read in the object file "crt2.o"
so as to have a definition of "atexit" (for example when linking the
runtime/cgo test), and we also need to allow for the possibility that
a given host archive might have to be looked at more than once. The goal
here is to get all.bash working on Windows when using an up to date
mingw C compiler (including those based on clang + LLD).
This patch also adds a new "hostObject" helper routine, similar to
"hostArchive" but specific to individual object files. There is also a
change to hostArchive to modify the pseudo-package name assigned when
reading archive elements: up until this point, a package name of
"libgcc" was used (even when reading a host archive like
"libmingex.a"), which led to very confusing errors messages if symbols
were missing or there were duplicate definitions.
Updates #35006.
Change-Id: I19c17dea9cfffa9e79030fc23064c7c63a612097
Reviewed-on: https://go-review.googlesource.com/c/go/+/382838
Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
The existing PE file loader has a special case for the symbol
"__acrt_iob_func", whose hosting object file contains both an actual
definition and also a DLL import symbol "__imp___acrt_iob_func". The
normal way of handling __imp_XXX symbols is for the host object loader
to rename them to their intended target (e.g. "XXX") however if the
target is also defined locally, you get a duplicate definition.
This patch generalizes the def/import symbol detection to apply to all
symbols in the object file being loaded (not just a hard-coded set),
since it will be needed when reading things like crt2.o.
Updates #35006.
Change-Id: I0d0607c27bb7d5f3cb415bc95db816aa13746ba2
Reviewed-on: https://go-review.googlesource.com/c/go/+/382837
Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
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Rewrite the helper "readpesym()" and the code that calls it to pass in
most of the values it needs via a state object (the signature was
getting a bit too busy/lengthy). No change in functionality, this is
just a refactor.
Updates #35006.
Change-Id: I6153ee3a9be3eb885694323ae8e07ec4c8eed646
Reviewed-on: https://go-review.googlesource.com/c/go/+/382836
Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
__SIZE_TYPE__ is a GCC type which has been superseded
by size_t -define in stddef.h- since ISO C99.
cmd/cgo already uses size_t in many places, but still generates several
files using __SIZE_TYPES__, most notably the _cgo_export.h.
This change replaces all __SIZE_TYPES__ occurrences with size_t.
Updates #36233
Change-Id: Id8a99b5d7763caab9333eab9b585e78249a37415
Reviewed-on: https://go-review.googlesource.com/c/go/+/379474
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Adding comments to these functions help IDE tooling to display
meaningful documentation, p.e. on hover.
Tested with gopls and vscode.
Updates #51134
Change-Id: Ie956f7cf192af0e828def4a141783f3a2589f77d
Reviewed-on: https://go-review.googlesource.com/c/go/+/386414
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Auto-Submit: Russ Cox <rsc@golang.org>
If a package could not be imported for whatever reason, the type checker
creates fake package with which it continues for more tolerant type
checking.
Do not report an "imported but not used" error in that case.
Clarify a few comments along the way.
Fixes#43109.
Change-Id: Ifeec0daa688fbf666412dc9176ff1522d02a23ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/396875
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
For syntax errors in various (syntactic) lists, instead of reporting
a set of "expected" tokens (which may be incomplete), provide context
and mention "possibly missing" tokens. The result is a friendlier and
more accurate error message.
Fixes#49205.
Change-Id: I38ae7bf62febfe790075e62deb33ec8c17d64476
Reviewed-on: https://go-review.googlesource.com/c/go/+/396914
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Robert Griesemer
Meng Zhuo
Bryan C. Mills
Russ Cox
zhouguangyuan
vpachkov
Wayne Zuo
Matthew Dempsky
Cuong Manh Le
Filippo Rossi
Wayne Zuo
Tobias Klauser
Eli Bendersky
erifan01
Ben Shi
nimelehin
John Anthony
Keith Randall
Than McIntosh
Jakub Ciolek
Cherry Mui
qmuntal