This resolves an asymmetry between the TParams and TArgs APIs, and
reduces the size of the Named struct at the cost of some additional nil
checks.
While at it, move TParamList and TypeList to a new file:typelists.go,
and change TParamList to access the tparams slice directly in At. There
is no reason to guard against a nil receiver, as accessing an index on
the empty slice will panic anyway.
Change-Id: I9b65247e06c697a57a4efe40c3390e0faff91441
Reviewed-on: https://go-review.googlesource.com/c/go/+/343933
Trust: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
Making this change improves type safety slightly, and avoids many
internal type assertions.
Change-Id: I26519b0e57068e944e8243983ae90553d79e59c2
Reviewed-on: https://go-review.googlesource.com/c/go/+/343932
Trust: Robert Findley <rfindley@google.com>
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Users should be able to access the type name associated with a type
parameter.
Change-Id: I495c3b4377f9d4807b1e78ad341e573d4d3c7bff
Reviewed-on: https://go-review.googlesource.com/c/go/+/343931
Trust: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
To match the API proposal, switch the first argument to Instantiate to
an opaque Environment handle, though for now this handle is
unimplemented.
Change-Id: I6207f0beafdf8497587abdad37db92f927db29b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/343930
Trust: Robert Findley <rfindley@google.com>
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This is a port of CL 342152 to go/types. Additionally, a panic was
removed from interface substitution, which is a fix from CL 333155 that
was previously missed.
A check for a nil Checker was also removed from types2.instantiate,
since check must not be nil in that method.
Change-Id: I4ea6bdccbd50ea2008ee6d870f702bee5cdd5a8e
Reviewed-on: https://go-review.googlesource.com/c/go/+/342671
Trust: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
On amd64 this reduces go binary sizes by 176 bytes due to not referencing
internal/cpu.ARM64 and internal/cpu.ARM.
Change-Id: I8e4f31e2b1939b05eec2148b44d7cff7e0aeb30e
Reviewed-on: https://go-review.googlesource.com/c/go/+/344329
Trust: Martin Möhrmann <martin@golang.org>
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CL 343732 enabled -G=3 by default. The types2 typechecker uses slighly
different error message format for language feature constraint.
The old typechecker format:
vendor/example.net/need117/need117.go:5:16: cannot convert s (type []byte) to type *[4]byte:
conversion of slices to array pointers only supported as of -lang=go1.17
The new format:
vendor/example.net/need117/need117.go:5:17: conversion of slices to array pointers only supported as of -lang=go1.17
caused the long test builders failed.
This CL fixes the test by relaxing the regext pattern a bit, so it can
match both the format.
Change-Id: I1c4acaa9e34b6c08dccbbc3ce7a99d4cd79f748a
Reviewed-on: https://go-review.googlesource.com/c/go/+/344212
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Robert Griesemer <gri@golang.org>
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The implementation for single strings had two optimization opportunities:
1. Grow the temporary buffer by known size before appending.
2. Avoid a full copy of the result since the underlying buffer won't be mutated afterward.
Both things were leveraged by using a Builder instead of a byte slice.
Relevant benchmark results:
name old time/op new time/op delta
SingleMatch-8 32.0µs ± 3% 26.1µs ± 3% -18.41% (p=0.000 n=9+10)
name old speed new speed delta
SingleMatch-8 469MB/s ± 3% 574MB/s ± 3% +22.56% (p=0.000 n=9+10)
name old alloc/op new alloc/op delta
SingleMatch-8 81.3kB ± 0% 49.0kB ± 0% -39.67% (p=0.000 n=10+10)
name old allocs/op new allocs/op delta
SingleMatch-8 19.0 ± 0% 11.0 ± 0% -42.11% (p=0.000 n=10+10)
Change-Id: I23af56a15875206c0ff4ce29a51bec95fd48bb11
GitHub-Last-Rev: 403cfc3c27
GitHub-Pull-Request: golang/go#47766
Reviewed-on: https://go-review.googlesource.com/c/go/+/343089
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This is a clean port of CL 344252 to go/types.
For #47895.
Change-Id: I48cbb97ec28fcfb4fdf483594be9d29426c117ac
Reviewed-on: https://go-review.googlesource.com/c/go/+/344254
Trust: Robert Griesemer <gri@golang.org>
Trust: Dan Scales <danscales@google.com>
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This test was never fully ported from go/types. Implement
a conversion function from syntax.Pos to string index so
that the test can be enabled again.
Also renamed the local variable syntax to segment to avoid
confusion with the syntax package.
Change-Id: I1b34e50ec138403798efb14c828545780f565507
Reviewed-on: https://go-review.googlesource.com/c/go/+/344253
Trust: Robert Griesemer <gri@golang.org>
Trust: Dan Scales <danscales@google.com>
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There's no need to specifically check for runtime.GOOS as there's
already a generic mechanism for that.
Change-Id: I7125443ead456548bd503c5e71cd56e9eb30b446
Reviewed-on: https://go-review.googlesource.com/c/go/+/330750
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Before parameterized types, unsafe.OffsetOf was always evaluating to
a constant. With parameterized types, the result may be a run-time
value, and unsafe.OffsetOf(x.f) is a call that is recorded. Also
record the argument x.f.
Fixes#47895.
Change-Id: Ia3da25028d4865d7295ce7990c7216bffe9e7c72
Reviewed-on: https://go-review.googlesource.com/c/go/+/344252
Trust: Robert Griesemer <gri@golang.org>
Trust: Dan Scales <danscales@google.com>
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sigprocmask is called from sigsave, which is called from needm. As such,
sigprocmask has to be able to run with no g. For some reason we do not
currently trip this on current libc platforms, but we do hit it on
openbsd/mips64 with external linking.
Updates #36435
Change-Id: I4dfae924245c5f68cc012755d6485939014898a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/334879
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
We have a constant for 179999, don't duplicate it.
Change-Id: Iefb9c4746f6dda2e08b42e3c978963198469ee8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/277375
Reviewed-by: Keith Randall <khr@golang.org>
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Run-TryBot: Michael Pratt <mpratt@google.com>
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Unquote implements unescaping a "single-quoted, doubled-quoted, or
backquoted Go string literal". Therefore, it should reject anything
that the Go specification explicitly forbids.
The section on "Rune literals" explicitly rejects rune values
"above 0x10FFFF and surrogate halves". We properly checked for
the previous condition, but were failing to check for the latter.
In general, "r > utf8.MaxRune" is probably the wrong check,
while !utf8.ValidRune(r) is the more correct check.
We make changes to both UnquoteChar and appendEscapedRune
to use the correct check. The change to appendEscapedRune
is technically a noop since callers of that function already
guarantee that the provided rune is valid.
Fixes#47853
Change-Id: Ib8977e56b91943ec8ada821b8d217b5e9a66f950
Reviewed-on: https://go-review.googlesource.com/c/go/+/343877
Trust: Joe Tsai <joetsai@digital-static.net>
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We can end up with this situation due to our equality tests being based on
'SEQZ (SUB x y)' - if x is a zero valued constant, 'SUB x y' can be converted
to 'NEG x'. When used with a branch the SEQZ can be absorbed, leading to
'BNEZ (NEG x)' where the NEG is redundant.
Removes around 1700 instructions from the go binary on riscv64.
Change-Id: I947a080d8bf7d2d6378ab114172e2342ce2c51db
Reviewed-on: https://go-review.googlesource.com/c/go/+/342850
Trust: Joel Sing <joel@sing.id.au>
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Convert BLT and BGE with a zero valued constant to BGTZ/BLTZ/BLEZ/BGEZ as
appropriate.
Removes over 4,500 instructions from the go binary on riscv64.
Change-Id: Icc266e968b126ba04863ec88529630a9dd44498b
Reviewed-on: https://go-review.googlesource.com/c/go/+/342849
Trust: Joel Sing <joel@sing.id.au>
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Also tweak comment for the arm64 case.
Change-Id: I073405bd2acf901dcaaf33a034a84b6a09dd4a83
Reviewed-on: https://go-review.googlesource.com/c/go/+/334869
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Meng Zhuo <mzh@golangcn.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Changing the mode of x before using the old value is clearly wrong.
And x is not needed anymore afterward so besides being misplaced,
the assignment is not needed in the first place.
Tested manually as it's a bit complicated to set up a test.
Needs to be back-ported to 1.17.
Fixes#47777.
Change-Id: I06f1fa9443eb98009b4276f566d557fd52f1d6d3
Reviewed-on: https://go-review.googlesource.com/c/go/+/343809
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This CL changes cmd/compile's -G flag's default from 0 to 3, which
enables use of the new types2 type checker and support for type
parameters. The old type checker is still available with
-gcflags=all=-G=0.
The CL also updates the regress test harness to account for the change
in default behavior (e.g., to expect known types2 changes/failures).
However, the -G=0 mode is still being tested for now.
Copy of CL 340914 by danscales@, minus the cmd/internal/objabi.AbsFile
change (handled instead by CL 343731) and rebased to master branch.
Updates #43651.
Change-Id: I1f62d6c0a3ff245e15c5c0e8f3d922129fdd4f29
Reviewed-on: https://go-review.googlesource.com/c/go/+/343732
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Fixes#46591
Change-Id: I4875092ecd7760b0cd487e793576ef7a9a569a0e
Reviewed-on: https://go-review.googlesource.com/c/go/+/343970
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
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The loop that makes progress assumes that after matching an id
you should advance len(id) bytes in the file. If id is the empty string,
then it will match and advance 0 bytes repeatedly.
0-byte ids are not really build IDs, so just reject it outright.
Fixes#47852.
Change-Id: Ie44a3a51dec22e2f68fb72d54ead91be98000cfe
Reviewed-on: https://go-review.googlesource.com/c/go/+/344049
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CL 324890 turned on register ABI by default on ARM64, causing neither
live.go nor live_regabi.go is run on ARM64.
This CL enables live_regabi.go test for ARM64.
Change-Id: I0c483a38b761c5a6f1fa9a5b3324b5da64907e61
Reviewed-on: https://go-review.googlesource.com/c/go/+/343531
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With types2, some syntax.PosBases need to be constructed from export
data, which must only contain "trimmed" filenames (i.e., that they've
already been made absolute and undergone -trimpath processing).
However, it's not safe to apply trimming to a filename multiple times,
and in general we can't distinguish trimmed from untrimmed filenames.
This CL resolves this by adding a PosBase.Trimmed boolean so we can
distinguish whether the associated filename has been trimmed yet. This
is a bit hacky, but is the least bad solution I've come up with so
far.
This unblocks enabling -G=3 by default.
Change-Id: I7383becfb704680a36f7603e3246af38b21f100b
Reviewed-on: https://go-review.googlesource.com/c/go/+/343731
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Change-Id: Ia6df881badf9a704c7f56967404d37e230b88a09
Reviewed-on: https://go-review.googlesource.com/c/go/+/343969
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Damien Neil <dneil@google.com>
This is a port of CL 342151 to go/types, adjusted for errors and
positions. Checker.sprintf was refactored to facilitate formatting
error messages with a nil Checker.
Change-Id: Ib2e5c942e55edaff7b5e77cf68a72bad70fea0b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/342670
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This is a straightforward port of CL 342150 to go/types.
Change-Id: I7363e4642ade7ab30ca822a2be71f4d2804cc4a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/342669
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This is a straightforward port of CL 342149 to go/types.
Change-Id: I468c5154b7545b7816bb3f240b8db91e7a1fd3f6
Reviewed-on: https://go-review.googlesource.com/c/go/+/342488
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This is a straightforward port of CL 341862 to go/types.
Change-Id: I4214c08d2889e2daf40254385656c6beed79571d
Reviewed-on: https://go-review.googlesource.com/c/go/+/342487
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If the indicated directory size in the archive header is so large that
subtracting it from the archive size overflows a uint64, the check that
the indicated number of files in the archive can be effectively
bypassed. Prevent this from happening by checking that the indicated
directory size is less than the size of the archive.
Thanks to the OSS-Fuzz project for discovering this issue and to
Emmanuel Odeke for reporting it.
Fixes#47801
Fixes CVE-2021-39293
Change-Id: Ifade26b98a40f3b37398ca86bd5252d12394dd24
Reviewed-on: https://go-review.googlesource.com/c/go/+/343434
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CL 302489 switched crypto/rand to use getentropy on darwin, however this
function is not available on iOS. Enable getentropy only on macOS and
disable it on iOS.
Fixes#47812
Change-Id: Ib7ba5d77346aee87904bb93d60cacc845f5c0089
Reviewed-on: https://go-review.googlesource.com/c/go/+/343609
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Currently, we store *types.Type in signatslice, then convert it to
typeAndStr during write runtime type process.
Instead, we can just store typeAndStr directly in signatslice when
adding type to signatset. Not a big win, but simplify the code a bit.
Change-Id: Ie1c8cfa5141da32b6ec3ce5844ba150d2765fe90
Reviewed-on: https://go-review.googlesource.com/c/go/+/343529
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Operands of memory type do not support SXTB extension. This CL adds this
missing check.
Change-Id: I1fa438dd314fc8aeb889637079cc67b538e83a89
Reviewed-on: https://go-review.googlesource.com/c/go/+/342769
Reviewed-by: eric fang <eric.fang@arm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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When using the FP or SP pseudo-register to load or store, pre-index and post-index formats
are not supported because the RSP and pseudo registers are not allowed to be modified in this
way. This CL deletes the related entries in optab and adds a few test cases.
Change-Id: Ie30d27d0e7b959242f0e6298b950489669d07989
Reviewed-on: https://go-review.googlesource.com/c/go/+/342770
Reviewed-by: eric fang <eric.fang@arm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: eric fang <eric.fang@arm.com>
Trust: Michael Knyszek <mknyszek@google.com>
Remove the unused defaultcflags and defaultldflags variables.
Reported by staticcheck.
Change-Id: Icc42f2e670496dbe2ffb26abe25128d8e53e2a6d
Reviewed-on: https://go-review.googlesource.com/c/go/+/321931
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This CL adds a new syscall.SyscallN API.
The proposal discussion also suggests the API should not only for
Windows but other platforms. However, the existing API set already
contain differences between platforms, hence the CL only implements
the Windows platform.
Moreover, although the API offers variadic parameters, the permitted
parameters remains up to a limit, which is selected as 42, and arguably
large enough.
Fixes#46552
Change-Id: I66b49988a304d9fc178c7cd5de46d0b75e167a4f
Reviewed-on: https://go-review.googlesource.com/c/go/+/336550
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Trust: Jason A. Donenfeld <Jason@zx2c4.com>
While processing signatset, the entry is deleted immediately after being
pushed to signatslice. Then calling writeType may add the same type
to signatset again. That would add more works, though not a big impact
to the performace, since when writeType is guarded by s.Siggen() check.
Instead, we should keep the entry in signatset, so written type will
never be added again.
This change does not affect compiler performace, but help debugging
issue like one in #46386 easier.
Change-Id: Iddafe773885fa21cb7003ba27ddf9554fc3f297d
Reviewed-on: https://go-review.googlesource.com/c/go/+/326029
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Conversion between slices with different element types is not allowed.
Previously (1.8 <= goversion <= 1.16), this conversion was allowed
if the base types were from different packages and had identical names.
Update #47785
Change-Id: I359de5b6fe3ff35bdbf9ab5a13902a0f820cac66
Reviewed-on: https://go-review.googlesource.com/c/go/+/343329
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Change Instantiate to be a function (not a method) and return an error.
Introduce an ArgumentError type to report information about which type
argument led to an error during verification.
This resolves a few concerns with the current API:
- The Checker method set was previously just Files. It is somewhat odd
to add an additional method for instantiation. Passing the checker as
an argument seems cleaner.
- pos, posList, and verify were bound together. In cases where no
verification is required, the call site was somewhat cluttered.
- Callers will likely want to access structured information about why
type information is invalid, and also may not have access to position
information. Returning an argument index solves both these problems;
if callers want to associate errors with an argument position, they
can do this via the resulting index.
We may want to make the first argument an opaque environment rather than
a Checker.
Change-Id: I3bc56d205c13d832b538401a4c91d3917c041225
Reviewed-on: https://go-review.googlesource.com/c/go/+/342152
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The methods on the pipe type don't need to be exported. Doing so sets
a bad precedent that it's OK to export methods to indicate an internal
public API. That's not a good idea in general, because exported methods
increase cognitive load when reading code: the reader needs to consider
whether the exported method might be used via some external interface
or reflection.
Change-Id: Ib13f1b3f9fe0ff251628f31b776182a0953268ee
Reviewed-on: https://go-review.googlesource.com/c/go/+/341409
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
Reviewed-by: Joe Tsai <joetsai@digital-static.net>
Trust: Daniel Martí <mvdan@mvdan.cc>
Many of the methods inside the archive/tar package don't need to be
exported. Doing so sets a bad precedent that it's OK to export methods
to indicate an internal public API. That's not a good idea in general,
because exported methods increase cognitive load when reading code:
the reader needs to consider whether the exported method might be used
via some external interface or reflection.
This CL should have no externally visible behaviour changes at all.
Change-Id: I94a63de5e6a28e9ac8a283325217349ebce4f308
Reviewed-on: https://go-review.googlesource.com/c/go/+/341410
Reviewed-by: Joe Tsai <joetsai@digital-static.net>
Trust: Joe Tsai <joetsai@digital-static.net>
Trust: Michael Knyszek <mknyszek@google.com>
This is used within Google's internal code repo, so getting it working
is a pre-req for enabling -G=3 by default.
Change-Id: Icbc570948c852ca09cdb2a59f778140f620244b2
Reviewed-on: https://go-review.googlesource.com/c/go/+/343429
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
It appears that this code predates golang.org/cl/96535, which added
RelCol to support /*line*/ directives.
Change-Id: Ib79cebc1be53af706e84e8799eeea81ef8c81c8b
Reviewed-on: https://go-review.googlesource.com/c/go/+/343430
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Conversions to regular concrete types should not be rewritten during
stenciling.
Fixes#47740
Change-Id: I2b45e22f962dcd2e18bd6cc876ebc0f850860822
Reviewed-on: https://go-review.googlesource.com/c/go/+/342989
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
In preparation for upcoming API changes, change the internal API for
verification of type arguments to return an error and argument index,
and use this to lift up error reporting into Instantiate.
Change-Id: I88b1e64dd9055c4c20c0db49c96c79c5da894450
Reviewed-on: https://go-review.googlesource.com/c/go/+/342151
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
When substituting a type instance, we rely on the instance being
expanded and do not call validType, so there is need to depend on
subster.pos for error reporting or to use subst.check for creating the
new Named type. Errors will be reported for the unsubstituted instance.
This is a superficial change, but justifies some later simplification
where we don't have access to pos or check.
Change-Id: I1f3f12aa245d821512c6242ad829c940f20afae4
Reviewed-on: https://go-review.googlesource.com/c/go/+/342150
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
These sorts are only important for 'toolstash -cmp' testing of unified
IR against -G=0 mode, but they were added before I added
-d=unifiedquirks to allow altering small "don't care" output details
like this.
This CL should help mitigate issues with #44195 until package
objectpath is updated and deployed.
Change-Id: Ia3dcf359481ff7abad5ddfca8e673fd2bb30ae01
Reviewed-on: https://go-review.googlesource.com/c/go/+/343390
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Change an internal call of instantiateLazy to call Instantiate, so that
we can consolidate the logic for invoking verification.
This made verification of signatures lazy, which is not necessary but
should be harmless.
Change-Id: I2e59b04ac859e08c2e2910ded3c183093d1e34a7
Reviewed-on: https://go-review.googlesource.com/c/go/+/342149
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
