Now that all flags are in a struct, use struct tags to set the usage messages
and use reflection to walk the struct and register all the flags.
Also move some flag usage back into main.go that shouldn't
come with the rest of flag.go into package base.
Change-Id: Ie655582194906c9ab425c3d01ad8c304bc49bfe0
Reviewed-on: https://go-review.googlesource.com/c/go/+/271668
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
In the previous CL, I had incorrectly removed one of the error
messages from issue20232.go, because I thought go/constant was just
handling it. But actually the compiler was panicking in nodlit,
because it didn't handle constant.Unknown. So this CL makes it leave
n.Type == nil for unknown constant.Values.
While here, also address #42732 by making sure to report an error
message when origConst is called with an unknown constant.Value (as
can happen when multiplying two floating-point constants overflows).
Finally, add OXOR and OBITNOT to the list of operations to report
errors about, since they're also constant expressions that can produce
a constant with a greater bit length than their operands.
Fixes#42732.
Change-Id: I4a538fbae9b3ac4c553d7de5625dc0c87d9acce3
Reviewed-on: https://go-review.googlesource.com/c/go/+/272928
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Russ Cox <rsc@golang.org>
The existing code introduces many types in what appears to be an
attempt to avoid allocation when converting formatting argument lists.
Simplify by accepting that allocation is going to happen, especially
when Node itself turns into an interface.
Change-Id: I3c0d45ca01eace4924deb43c0ea7dc6d65943d08
Reviewed-on: https://go-review.googlesource.com/c/go/+/272929
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
The goal is to move Node to being an interface and then break
up the one big struct into many implementations.
Step 1 is to convert all current uses of Node to only use methods,
so that the existing algorithms keep working even as the underlying
implementations are adjusted.
Step 0 - this CL - is to add the getters and setters for Step 1.
Change-Id: I0570d8727c3ccb64113627bb9bebcb0dc39da07a
Reviewed-on: https://go-review.googlesource.com/c/go/+/273007
Trust: Russ Cox <rsc@golang.org>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
For the upcoming rewrite to access methods, a few direct accesses
are problematic for the automated tool, most notably direct copies
or use of Node structs as opposed to pointers.
Fix these manually.
Passes toolstash -cmp.
Change-Id: I8bdbb33216737c09e1edda284d5c414422d86284
Reviewed-on: https://go-review.googlesource.com/c/go/+/273006
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
I've wanted a FatalfAt function for a while, but under the old "-l"
suffix naming convention it would have been called "Fatalfl", which is
just atrocious.
Change-Id: If87f692ecdff478769426d4b054ac396e5c1e42e
Reviewed-on: https://go-review.googlesource.com/c/go/+/273013
Trust: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Russ Cox <rsc@golang.org>
evconst is one of the largest sources of Op rewrites,
which prevent separating different kinds of nodes
(in this case, arithmetic nodes and OLITERAL nodes).
The change in swt.go is necessary because otherwise
the syntax graph ends up containing that OLEN expression
multiple times, which violates the invariant that it's a tree
except for ONAME, OLITERAL, and OTYPE nodes.
(Before, the OLEN was overwritten by an OLITERAL, so the
invariant still held, but now that we don't overwrite it,
we need a different copy for each instance.)
Passes toolstash -cmp.
Change-Id: Ia004774ab6852fb384805d0f9f9f234b40842811
Reviewed-on: https://go-review.googlesource.com/c/go/+/272869
Trust: Russ Cox <rsc@golang.org>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
The leftover n.List is clearly unnecessary, but it makes the
inlining cost of the expression unnecessarily high.
This change breaks toolstash -cmp:
# cmd/internal/src
toolstash: compiler output differs, with optimizers disabled (-N)
inconsistent log line:
/tmp/go-build866291351/b230/_pkg_.a.log:77:
/Users/rsc/go/src/cmd/internal/src/pos.go:275:6: can inline (*PosBase).SymFilename with cost 9 as: method(*PosBase) func() string { if b != nil { return b.symFilename }; return "gofile..??" }
/tmp/go-build866291351/b230/_pkg_.a.stash.log:77:
/Users/rsc/go/src/cmd/internal/src/pos.go:275:6: can inline (*PosBase).SymFilename with cost 11 as: method(*PosBase) func() string { if b != nil { return b.symFilename }; return "gofile..??" }
Separated from other constant work so that the bigger CL can pass toolstash -cmp.
Change-Id: I5c7ddbc8373207b5b9824eafb8639488da0ca1b7
Reviewed-on: https://go-review.googlesource.com/c/go/+/272868
Trust: Russ Cox <rsc@golang.org>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
A method expression today is an ONAME that has none of the
invariants or properties of other ONAMEs and is always a special case
(hence the Node.IsMethodExpression method).
Remove the special cases by making a separate Op.
Passes toolstash -cmp.
Change-Id: I7667693c9155d5486a6924dbf75ebb59891c4afc
Reviewed-on: https://go-review.googlesource.com/c/go/+/272867
Trust: Russ Cox <rsc@golang.org>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This CL is obviously OK but does not pass toolstash -cmp,
because it renumbers the Op codes. In a separate CL so that
we can use toolstash -cmp on the CL with real changes
related to OMETHEXPR.
Change-Id: I1db978e3f2652b3bdf51f7981a3ba5137641c8c7
Reviewed-on: https://go-review.googlesource.com/c/go/+/272866
Trust: Russ Cox <rsc@golang.org>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
The original meaning of type Func was "extra fields factored out
of a few cases of type Node having to do with functions",
but those specific cases didn't necessarily have any relation.
A typical declared function is represented by an ODCLFUNC Node
at its declaration and an ONAME node at its uses, and both those
have a .Func field, but they are *different* Funcs.
Similarly, a closure is represented both by an OCLOSURE Node for
the value itself and an ODCLFUNC Node for the underlying function
implementing the closure. Those too have *different* Funcs,
and the Func.Closure field in one points to the other and vice versa.
This has led to no end of confusion over the years.
This CL elevates type Func to be the canonical identifier for
a given Go function.
This looks like a trivial CL but in fact is the result of a lot of
scaffolding and rewriting, discarded once the result was achieved, to
separate out the three different kinds of Func nodes into three
separate fields, limited in use to each specific Node type, to
understand which Func fields are used by which Node types and what the
possible overlaps are. There were a few overlaps, most notably around
closures, which led to more fields being added to type Func to keep
them separate even though there is now a single Func instead of two
different ones for each function.
A future CL can and should change Curfn to be a *Func instead of
a *Node, finally eliminating the confusion about whether Curfn
is an ODCLFUNC node (as it is most of the time) or an ONAME node
(as it is when type-checking an inlined function body).
Although sizeof_test.go makes it look like Func is growing by two
words, there are now half as many Funcs in a running compilation,
so the memory footprint has actually been reduced substantially.
Change-Id: I598bd96c95728093dc769a835d48f2154a406a61
Reviewed-on: https://go-review.googlesource.com/c/go/+/272253
Trust: Russ Cox <rsc@golang.org>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
We want to refactor a bit, and these tests know too much about
the layout of Nodes. Use standard constructors instead.
Change-Id: I91f0325c89ea60086655414468c53419ebeacea4
Reviewed-on: https://go-review.googlesource.com/c/go/+/272626
Trust: Russ Cox <rsc@golang.org>
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TryBot-Result: Go Bot <gobot@golang.org>
go/constant relies on strconv for parsing Go literals, while older
versions of strconv either lack recent Go language features (e.g., Go
1.13's new numeric literals) or have errors (e.g., mishandling of
carriage returns in raw string literals prior to Go 1.8).
This requires two changes:
1. Splitting out the internal/bytealg dependency into a separate file,
which can be easily substituted with a simple loop for bootstrap
builds.
2. Updating eisel_lemire.go to not utilize Go 1.13 functionality
(underscores in numeric literals and signed shift counts).
Change-Id: Ib48a858a03b155eebdcd08d577aec2254337e70e
Reviewed-on: https://go-review.googlesource.com/c/go/+/272749
Reviewed-by: Robert Griesemer <gri@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Since CL 255217, we've been able to rely on types.UntypedRune to
identify untyped rune literals, rather than needing Mpint.Rune /
CTRUNE. This makes way for switching to using go/constant, which
doesn't have a separate notion of rune constants distinct from integer
constants.
Passes toolstash-check.
Change-Id: I319861f4758aeea17345c101b167cb307e706a0e
Reviewed-on: https://go-review.googlesource.com/c/go/+/272652
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Small refactoring to make subsequent CLs clearer.
Passes toolstash-check.
Change-Id: I1a6ae599f491220d44aaabae0b7bed4aff46ee92
Reviewed-on: https://go-review.googlesource.com/c/go/+/272651
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Properly speaking, "nil" is a zero value, not a constant. So
go/constant does not have a representation for it. To allow replacing
Val with constant.Value, we split out ONIL separately from OLITERAL so
we can get rid of CTNIL.
Passes toolstash-check.
Change-Id: I4c8e60cae3b3c91bbac43b3b0cf2a4ade028d6cb
Reviewed-on: https://go-review.googlesource.com/c/go/+/272650
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Subsequent CL will make use of ONIL. Split out separately so that the
next CL can pass toolstash-check.
Change-Id: I49d77bedbe2cac4a5da149c925cda969e50b0b2d
Reviewed-on: https://go-review.googlesource.com/c/go/+/272649
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Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Address outstanding TODO, which simplifies subsequent CLs.
Now the compiler always type checks type-switch case clauses (like
gccgo), but it treats clause variables as broken if an appropriate
type cannot be determined for it (like go/types).
Passes toolstash-check.
Change-Id: Iedfe9cdf38c6865211e4b93391f1cf72c1bed136
Reviewed-on: https://go-review.googlesource.com/c/go/+/272648
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Trust: Matthew Dempsky <mdempsky@google.com>
When type switching from interface{} to T, and then returning the T as
interface{} again, it's better to return the original interface{}
value. This avoids needing to heap allocate the T for
non-pointer-shaped types (i.e., int64Val, complexVal, stringVal).
Change-Id: I25c83b3f9ec9bd2ffeec5a65279b68f4fcef8a19
Reviewed-on: https://go-review.googlesource.com/c/go/+/272647
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Avoids an unnecessary heap allocation when computing the bit length of
int64 values.
Change-Id: I69dfc510e461daf3e83b0b7b6c0707f6526a32d0
Reviewed-on: https://go-review.googlesource.com/c/go/+/272646
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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The next CL will introduce a package ir to hold the IR definitions.
This CL adjusts a few names and makes a few other minor changes
to make the next CL - an automated one - smoother.
Change-Id: Ie787a34732efd5b3d171bf0c1220b6dd91994ce3
Reviewed-on: https://go-review.googlesource.com/c/go/+/272251
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
We want to introduce a package cmd/compile/internal/base,
and these will shadow it at points where it is needed.
Change-Id: Ic936733fba1ccba8c2ca1fdedbd4d2989df4bbf4
Reviewed-on: https://go-review.googlesource.com/c/go/+/272249
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Prepare for factoring the error API out of this package by
cleaning it up. The doc comments use the intended new names,
which will be introduced in the next CL.
Change-Id: Ie4c8d4262422da32a9a9f750fda42c225b6b42a8
Reviewed-on: https://go-review.googlesource.com/c/go/+/272248
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This sets up the next CL, moving importMap to a global zeroed struct.
Change-Id: I1acc91b440d3da6e28fb32bd275fb3cd36db4e97
Reviewed-on: https://go-review.googlesource.com/c/go/+/272046
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
The current implementation copies Debug, clears a bunch of flags
that are meant to be considered OK, and then checks the result
against the zero value. But more flags are cleared than remain:
it's easier to write and to understand to just check the ones that
need checking.
This phrasing also makes it safe to move more flags into the struct.
It turns out that some of the flags being checked should probably
not be checked, but this CL is meant to be a strict semantic no-op,
so left a TODO to clean up the function a bit more later.
Change-Id: I7afe6d7b32b5b889c40dd339568e8602e02df9bc
Reviewed-on: https://go-review.googlesource.com/c/go/+/271666
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Now that there's no code remaining that uses Func.Nname, we can get
rid of it along with the remaining code that uselessly assigns to it.
Passes toolstash-check.
Change-Id: I104ab3bb5122fb824c741bc6e4d9d54fefe5646e
Reviewed-on: https://go-review.googlesource.com/c/go/+/272390
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
Automated factoring produced by rf script below to replace uses of
Func.Nname with Field.Nname or Node.MethodName as appropriate.
Some dead assignments to Func.Nname are left behind; these will be
removed in a subequent remove-only CL.
Passes toolstash-check.
[git-generate]
cd src/cmd/compile/internal/gc
rf '
ex \
import "cmd/compile/internal/types"; \
var f *types.Field; \
var n *types.Node; \
f.Type.Nname() -> f.Nname; \
f.Type.SetNname(n) -> f.Nname = n; \
f.Type.FuncType().Nname -> f.Nname
ex \
var n *Node; \
asNode(n.Type.Nname()) -> n.MethodName(); \
asNode(n.Type.FuncType().Nname) -> n.MethodName(); \
asNode(callpartMethod(n).Type.Nname()) -> n.MethodName()
'
Change-Id: Iaae054324dfe7da6f5d8b8d57a1e05b58cc5968c
Reviewed-on: https://go-review.googlesource.com/c/go/+/272389
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There are three bits of method-handling code where we separately go
from Field->Type and then Type->Node. By shuffling the code around a
little to go Field->Type->Node in a single statement, we're able to
more easily remove Type from the operation.
Passes toolstash-check.
Change-Id: Ife98216d70d3b867fa153449abef0e56a4fb242a
Reviewed-on: https://go-review.googlesource.com/c/go/+/272388
Trust: Matthew Dempsky <mdempsky@google.com>
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A common operation throughout the front end is getting the ONAME for a
method used in a method selector, method expression, or method value.
This CL adds MethodName as a uniform API for doing this for all of
these kinds of nodes.
For method selectors (ODOTMETH) and method expressions (ONAMEs where
isMethodExpression reports true), we take advantage of the Node.Opt
field to save the types.Field. This is the approach we already started
taking in golang.org/cl/271217 (caching types.Field in Node.Opt for
ODOT).
For method values (OCALLPART), we continue using the existing
callpartMethod helper function. Escape analysis already uses Node.Opt
for tracking the method value's closure's data flow.
A subsequent, automated refactoring CL will make more use of this
method. For now, we just address a few cases in inl.go that aren't
easily automated.
Passes toolstash-check.
Change-Id: Ic92b288b2d8b2fa7e18e3b68634326b8ef0d869b
Reviewed-on: https://go-review.googlesource.com/c/go/+/272387
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These are almost always set, so might as well expect callers to
provide them. They're also all required by go/types's corresponding
New{Field,Func,Param,Var} functions, so this eases API compatibility.
Passes toolstash-check.
Change-Id: Ib3fa355d4961243cd285b41915e87652ae2c22f6
Reviewed-on: https://go-review.googlesource.com/c/go/+/272386
Trust: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
The bug was introduced by https://golang.org/cl/220844.
Fixes#42790.
Change-Id: I44d619a1a4d3f2aee1c5575d5cfddcc4ba10895f
Reviewed-on: https://go-review.googlesource.com/c/go/+/272666
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This change tweaks and simplifies the descriptions of a couple metrics
to make them easier to parse (for humans).
Change-Id: I852654c7e7042c662ebdfa6334e3baf49ca4b33c
Reviewed-on: https://go-review.googlesource.com/c/go/+/272566
Trust: Michael Knyszek <mknyszek@google.com>
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This aligns the naming with GOARCH using 386 as a build target for
this architecture and makes it more easily found when searching
for documentation related to the build target.
Change-Id: I393bb89dd2f71e568124107b13e1b288fbd0c76a
Reviewed-on: https://go-review.googlesource.com/c/go/+/271988
Trust: Martin Möhrmann <moehrmann@google.com>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
This issue was already fixed at tip. Just adding the test that
failed on 1.14/1.15.
Update #42753
Change-Id: I00d13ade476b9c17190d762d7fdcb30cf6c83954
Reviewed-on: https://go-review.googlesource.com/c/go/+/272029
Trust: Keith Randall <khr@golang.org>
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Reviewed-by: David Chase <drchase@google.com>
Because we're expecting for future functions to be unavailable, we
should add an Unwrap() function to the DLLError struct, so that people
can test for this situation easily via:
if errors.Is(err, syscall.ERROR_PROC_NOT_FOUND) { ... }
DLLError already was wrapping the underlying Errno error, but never got
the Go 1.13 helper method.
Fixesgolang/go#42584
Change-Id: I0f32a5146946b1b37a30897ba825a56faefc792c
Reviewed-on: https://go-review.googlesource.com/c/go/+/269761
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Trust: Alex Brainman <alex.brainman@gmail.com>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
The Reqs function returns an mvs.Reqs implemention for the global
build list. The API that it presents assumes that the build list is
globally consistent (problematic for #40775) and readily available
(problematic for #36460).
Fortunately, it is no longer used outside of the modload package.
We can instead use individual instances of the unexported mvsReqs
struct, making the dependency on the global build list more explicit.
For #36460
For #40775
Change-Id: I8674442f2a86416b0bf9c3395cb591c1e724c9d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/272129
Trust: Bryan C. Mills <bcmills@google.com>
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Reviewed-by: Jay Conrod <jayconrod@google.com>
Move the declaration of the -overlay flag to base.AddModCommonFlags,
where other flags that are needed for go mod commands and for builds
are declared. The flag's already initialized in modload.Init so
there's no additional work needed to be done to support it in the go
mod commands.
For #39958
Change-Id: I70725d620cc69cb820f6ed923d626f4fe041b1c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/272126
Trust: Michael Matloob <matloob@golang.org>
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Reviewed-by: Jay Conrod <jayconrod@google.com>
The gofrontend mangling scheme used by gccgo and GoLLVM has changed again.
Support the new version. This is a port of the relevant parts of
https://golang.org/cl/271726.
For #41862
Change-Id: I9c961c8e17ec960a83a23e1d49ea900962b63393
Reviewed-on: https://go-review.googlesource.com/c/go/+/272127
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
This change updates the lockedfile package to open files using the
new fsys.OpenFile function. The logic of fsys.Open has been moved into
fsys.OpenFile, and fsys.Open is now just a light wrapper around it.
For #39958
Change-Id: I552f1a45ac00ac06b5812008d17a61e610b4b113
Reviewed-on: https://go-review.googlesource.com/c/go/+/266797
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
This CL restores a message unintentionally removed in CL 270858.
For #24031
Change-Id: I957c5c59e624df98e72dfff351298bfc5bf9a9e7
Reviewed-on: https://go-review.googlesource.com/c/go/+/272066
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Same reason as CL 270057, but for OpLoad.
Fixes#42727
Change-Id: Iebb1a8110f29427a0aed3b5e3e84f0540de3d1b7
Reviewed-on: https://go-review.googlesource.com/c/go/+/271906
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
