Comparable type no longer has a special method '=='.
Change-Id: I152f324d83343a66300050479181a6607fb7ca26
Reviewed-on: https://go-review.googlesource.com/c/go/+/338409
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Presumably the "It is safe to call on a nil receiver" comment was
mistakenly copied from TypeParams.Len, which is actually safe to call
on a nil receiver.
Change-Id: Iec5ae32c98dc91ce84a6207b47f2b1e530bdbfe2
Reviewed-on: https://go-review.googlesource.com/c/go/+/338430
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Change-Id: Id68d41f09e78343953167cb1e38fb1ebc41a34d4
Reviewed-on: https://go-review.googlesource.com/c/go/+/338429
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The other uses of Unshapify were really only there to allow for the
dictionary checking code at the beginning of generic functions/methods.
But that will go away as soon as we start combining real shapes. If we
get rid of that code, we can get rid of the unshapify calls elsewhere.
The only tricky part is that getInstantiation now gets targs that may each
either be a shape or concrete type, and it must translate any concrete
types to shapes, while leaving the already existing shapes.
Change-Id: Ib2b9072b921f8e064958548a1078d82f1d040c9f
Reviewed-on: https://go-review.googlesource.com/c/go/+/338289
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Rewrite a method expression such as 'T.String' (where T is type param
and String is part of its type bound Stringer) as:
func(rcvr T, other params...) {
return Stringer(rcvr).String(other params...)
}
New function buildClosure2 to create the needed closure. The conversion
Stringer(rcvr) uses the dictionary in the outer function.
For a method expression like 'Test[T].finish' (where finish is a method
of Test[T]), we can already deal with this in buildClosure(). We just
need fix transformDot() to allow the method lookup to fail, since shapes
have no methods on them. That's fine, since for any instantiated
receiver type, we always use the methods on the generic base type.
Also removed the OMETHEXPR case in the main switch of node(), which
isn't needed any (and removes one more potential unshapify).
Also, fixed two small bugs with handling closures that have generic
params or generic captured variables. Need to set the instInfo for the
closure in the subst struct when descending into a closure during
genericSubst() and was missing initializing the startItabConv and gfInfo
fields in the closure info.
Change-Id: I6dadedd1378477936a27c9c544c014cd2083cfb7
Reviewed-on: https://go-review.googlesource.com/c/go/+/338129
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This matches the accessor named Constraint, and any documentation we have so far.
Use iface instead of Bound internally to types2; keep Bound because of two external
uses but mark it as deprecated. Adjust clients.
Change-Id: Id1a2c2f28259a16082e875eee0534d46cf157336
Reviewed-on: https://go-review.googlesource.com/c/go/+/338196
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This is a clean port of CL 336251.
Change-Id: I08415c3e9b6cef33594e7d56c4115ddde8030381
Reviewed-on: https://go-review.googlesource.com/c/go/+/338193
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This is a port of CL 336249 with adjustments due to slightly
different handling of type parameter declaration in types2.
The CL also contains adjustments to the compiler front-end.
With this change it is not necessary to export type parameter
indices. Filed issue #47451 so we don't forget.
Change-Id: I2834f7be313fcb4763dff2a9058f1983ee6a81b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/338192
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This field is not needed anymore.
Follow-up on CL 335978 and CL 338097.
Change-Id: I8032e5153ba65c6a4aaf6575ac6d5a15a61f1b81
Reviewed-on: https://go-review.googlesource.com/c/go/+/338098
Trust: Robert Griesemer <gri@golang.org>
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This is a straight port of CL 335978 with minor adjustements to
white space and an error message.
Change-Id: Icfcb562f75802a119ce5d02427bffecf7e279b2f
Reviewed-on: https://go-review.googlesource.com/c/go/+/338097
Trust: Robert Griesemer <gri@golang.org>
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This is just an internal representation change for now.
Change-Id: I7e0126e9b17850ec020c2a60db13582761557bea
Reviewed-on: https://go-review.googlesource.com/c/go/+/338092
Trust: Robert Griesemer <gri@golang.org>
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Type terms will be used to represent a type set as a list
of type terms. Eventually, a type term may also include
a method set.
Groundwork for the implementation of lazily computed
type sets for union expressions.
Change-Id: Ic88750af21f697ce0b52a2259eff40bee115964c
Reviewed-on: https://go-review.googlesource.com/c/go/+/338049
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Introduce new dynamic dottype operations which take a dynamic
instead of static type to convert to.
Change-Id: I5824a1fea056fe811b1226ce059e1e8da1baa335
Reviewed-on: https://go-review.googlesource.com/c/go/+/337609
Trust: Keith Randall <khr@golang.org>
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After the previous two CLs, there's no need for unified IR to
write/read blank functions anymore: types2 has already checked that
they're valid, and the compiler backend is going to ignore them.
Allows dropping code for worrying about blank methods and will
probably simplify some of the object handling code eventually too.
Fixes#47446.
Change-Id: I03cb722793d676a246b1ab768b5cf0d3d2578b12
Reviewed-on: https://go-review.googlesource.com/c/go/+/338096
Trust: Matthew Dempsky <mdempsky@google.com>
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After typechecking a blank function, we can clear out its body and
skip applying middle-end optimizations (inlining, escape analysis). We
already skip sending them through SSA, and the previous CL updated
inlining and escape analysis regress tests to not depend on compiling
blank functions.
Updates #47446.
Change-Id: Ie678763b0e6ff13dd606ce14906b1ccf1bbccaae
Reviewed-on: https://go-review.googlesource.com/c/go/+/338095
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This CL renames blank functions in the test/ directory so that they
don't rely on the compiler doing anything more than typechecking them.
In particular, I ran this search to find files that used blank
functions and methods:
$ git grep -l '^func.*\b_(' | xargs grep -n '^' | grep '\.go:1:' | grep -v '// errorcheck$'
I then skipped updating a few files:
* blank.go
* fixedbugs/issue11699.go
* fixedbugs/issue29870.go
These tests specifically check that blank functions/methods work.
* interface/fail.go
Not sure the motivation for the blank method here, but it's empty
anyway.
* typeparam/tparam1.go
Type-checking test, but uses "-G" (to use types2 instead of typecheck).
Updates #47446.
Change-Id: I9ec1714f499808768bd0dcd7ae6016fb2b078e5e
Reviewed-on: https://go-review.googlesource.com/c/go/+/338094
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We don't usually reformat the test directory, but all of the files in
test/typeparam are syntactically valid. I suspect the misformattings
here are because developers aren't re-installing gofmt with
-tags=typeparams, not intentionally exercising non-standard
formatting.
Change-Id: I3767d480434c19225568f3c7d656dc8589197183
Reviewed-on: https://go-review.googlesource.com/c/go/+/338093
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This is a port of CL 335929 to types2. It differs significantly from
that CL to handle lazy loading, which wasn't tested in go/types.
Additionally, the *Checker field was moved out of instance and back
onto Named. This way we can tell whether a Named type is uninstantiated
simply by checking whether Named.instance is non-nil, which simplified
the code considerably.
Fixes#46151
Change-Id: I617263bcfaa768ac5442213cecad8d567c2749fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/336252
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Fix the cons.go missing method error. Mark all the methods of
instantiated interface types as used. We could try to record all the
exact methods used for generic interface types, but for now, just mark
all the methods as used so that their methods are not dead-code
eliminated.
Change-Id: I35685eda82476244371379b97691a1b8506ef0f7
Reviewed-on: https://go-review.googlesource.com/c/go/+/337349
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Reviewed-by: Keith Randall <khr@golang.org>
This removes the special "==" methods from comparable interfaces in
favor of a "comparable" flag in TypeSets indicating that the interface
is or embeds comparable. Fixes various related implementation
inaccuracies.
While at it, fix setup of the predeclared error and comparable
interface types by associating their respective type name objects
with them.
For #47411.
Change-Id: I409f880c8c8f2fe345621401267e4aaabd17124d
Reviewed-on: https://go-review.googlesource.com/c/go/+/337354
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
append is fine using shape types.
Change-Id: Iae829b9b5929d4dc7aa74bed57da13d4f6d746be
Reviewed-on: https://go-review.googlesource.com/c/go/+/337669
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Currently, deferproc stores the caller SP as a uintptr in a local
variable across a call to newdefer, but newdefer could grow the stack
and invalidate this saved SP, causing deferproc to store a stale SP in
the defer record. This would lead to us later failing to match that
defer to its calling frame, and we wouldn't run the defer at the right
time (or possibly at all).
It turns out this isn't crashing horribly right now only because the
compiler happens to only materialize the result of getcallersp when
this variable is used, *after* the call to newdefer. But this is
clearly on thin ice, so this CL moves the getcallersp() to the place
where we actually need the result.
Change-Id: Iae8ab226e03e4482f16acfb965885f0bd83a13b0
Reviewed-on: https://go-review.googlesource.com/c/go/+/337649
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Reviewed-by: Cherry Mui <cherryyz@google.com>
Change-Id: I5eb03ae349925f0799dd866e207221429bc9fb3c
Reviewed-on: https://go-review.googlesource.com/c/go/+/337353
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Change-Id: I95a96f9dbd199cee3a4be8f42cd64e7f44ba5e5b
Reviewed-on: https://go-review.googlesource.com/c/go/+/336989
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This is a straight port of https://golang.org/cl/330431.
For #43232
Change-Id: I5954bdff22a524eaa08754947da9b428b27f7d95
Reviewed-on: https://go-review.googlesource.com/c/go/+/336351
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This is a partial port of https://golang.org/cl/330629, containing
only the actual bug fix and adjustements to another test file.
The respective test case has not been ported yet as it requires
some bigger adjustments.
For #46905
Change-Id: Ibd20658b8a31855da20cf56e24bcce9560656ca0
Reviewed-on: https://go-review.googlesource.com/c/go/+/336350
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Conflicts:
- src/cmd/compile/internal/ssagen/ssa.go
CL 336629 touched code that had already been removed on dev.typeparams.
Merge List:
+ 2021-07-26 ecaa6816bf doc: clarify non-nil zero length slice to array pointer conversion
+ 2021-07-26 1868f8296e crypto/x509: update iOS bundled roots to version 55188.120.1.0.1
+ 2021-07-25 849b791129 spec: use consistent capitalization for rune literal hex constants
+ 2021-07-23 0914646ab9 doc/1.17: fix two dead rfc links
+ 2021-07-22 052da5717e cmd/compile: do not change field offset in ABI analysis
Change-Id: Ie570ec3f6a3241e0495e39e8a73b3a09a9368605
This CL changes fixedbugs/issue30862.go into a "runindir" test so that
it can use '-goexperiment fieldtrack' and test that //go:nointerface
works with cmd/compile. In particular, this revealed that -G=3 and
unified IR did not handle it correctly.
This CL also fixes unified IR's support for //go:nointerface and adds
a test that checks that //go:nointerface, promoted methods, and
generics all interact as expected.
Updates #47045.
Change-Id: Ib8acff8ae18bf124520d00c98e8915699cba2abd
Reviewed-on: https://go-review.googlesource.com/c/go/+/332611
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There is an example for nil slice already, so adding example for non-nil
zero length slice, too, clarifying to the reader that the result is also
non-nil and different from nil slice case.
Updates #395
Change-Id: I019db1b1a1c0c621161ecaaacab5a4d888764b1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/336890
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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HasShape needs a TINTER case.
Add a test for x.(T) in various situations. Needs the fix above.
Also remove ONEW unshapify case. It is ok for ONEW to have a shape
type, as it will just be passed to mallocgc, or possibly used as a
stack object type, both of which are ok.
Change-Id: Ibddf8f5c8c254d32cb5ebcaca7dc94b4c00ab893
Reviewed-on: https://go-review.googlesource.com/c/go/+/337231
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Fixes -G=3 issue with issue44688.go.
Change-Id: Ie98c0cbd48683dedd115332043f14c8f3160f46c
Reviewed-on: https://go-review.googlesource.com/c/go/+/337029
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We just need to substitute from the typeparams to the shapes for the dst
type of the bound.
Removed concretify substituter, not used anymore. Also removed
shape2params, not needed anymore.
However, since the dst type is now not concrete, this gives more cases
where the linker can't find a method.
I realized that we need to call MarkUsedIfaceMethod to mark a method as
used on a particular interface, else a type's method can be still
deadcoded even though MarkTypeUsedInInterface has been called on the
concrete type. I added a new version MarkUsedIfaceMethodIndex to fit my
use case.
Change-Id: Id67b72b350889dd3688b42739c337d5d79a0d1a2
Reviewed-on: https://go-review.googlesource.com/c/go/+/337230
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
This operation computes just the data field needed to put its argument
into an interface. Used by generics because we produce the type field
of an interface using dictionaries (instead of statically).
With this operation defined, we can now assert that shape types
are never marked as used in interfaces (the only previous use
was IDATA(CONVIFACE(t))).
Change-Id: Idb1eb5f3b238285cb99413d382599c0621b7681a
Reviewed-on: https://go-review.googlesource.com/c/go/+/337109
Trust: Keith Randall <khr@golang.org>
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As of CL 334894, type sets are lazily evaluated on interfaces. For the
universe interfaces error and comparable, this can lead to data races
when type checking concurrently. Fix this by computing their type set
when they are defined.
Tested using the repro from #47345. I considered checking this in as a
test, but it probably wouldn't add much value going forward.
Fixes#47345
Change-Id: I014a511b8e3c092c86201a8bfc7f5f494f8f20e8
Reviewed-on: https://go-review.googlesource.com/c/go/+/336910
Trust: Robert Findley <rfindley@google.com>
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Add a test to make sure there's no invalid OCONVIFACEs when stenciling is done.
Use concrete types for the type of DOTTYPE and DOTTYPE2.
MarkTypeUsedInInterface - should we allow types with shape types
underneath? I think the itab CL will help with this (at least, for
a remaining cons.go issue).
Change-Id: I2c96d74e8daaca26cadc84ea94abb9a27c0bb240
Reviewed-on: https://go-review.googlesource.com/c/go/+/337069
Trust: Keith Randall <khr@golang.org>
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Even if we can otherwise transform a return statement because of type
params, add CONVIFACE nodes where appropriate.
Change-Id: Ia2216d5f6805926075ba6802a4385eee1d63e37e
Reviewed-on: https://go-review.googlesource.com/c/go/+/337049
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This fix the case where a type param or derived type is converted to a
non-empty interface. Previously, we were converting to an empty
interface and then using DOTTYPE to convert to the correct non-empty
interface. In that case, we can get the needed itab directly from the
dictionary. This is needed for correctness from shapes, if the
destination interface is parameterized, else we will incorrectly convert
to the shape version of the interface.
Creating/writing an itab can involve generating wrappers for a bunch of
methods, which may use dictionaries. So, all the
dictionaries/instantiations are being generated on the fly and have
recursive relationships, it is simplest to finish creating/writing the
itabs at the end of the stenciling phase. So, we create a list of the
dictionaries which need to be completed by writing out their itab
entries.
The existing tests ordered.go, ifaceconv.go, and issue44688.go make use
of this optimization.
Got itab conversions for bound calls working, except for 13.go.
Also, want to get rid of the concretify, but I think we need more info
on the Bound from types2.
Change-Id: If552958a7b8a435500d6cc42c401572c367b30d1
Reviewed-on: https://go-review.googlesource.com/c/go/+/336993
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Changes to add CONVIFACE nodes where possible in noder2, even when the
args are typeparams. The transformation to insert a CONVIFACE node can
usually happen when there an obvious assignment/conversion to an
interface type from a non-interface type. So, we now do this
tranformation for:
- direct conversions to an interface type
- function arguments that are implicitly converted to an interface
based on the parameter types.
- EQ/NE comparison of an interface and a non-interface
With this change, we can remove some special case checks for CONVIFACE
nodes after transformation in node(), and instead just have the one
check in the CONVIFACE check.
Change-Id: I7cf2ef920aebf9e5553210aeaf19f344e128ca62
Reviewed-on: https://go-review.googlesource.com/c/go/+/336992
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Updates #44513
Change-Id: Ia0c6b48bde2719f3a99cb216b6166d82159198d1
Reviewed-on: https://go-review.googlesource.com/c/go/+/336930
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Previously it was just printing <S>. Now it prints things like int32|~int64.
Change-Id: I960b011ce8ed360020a49ae7809d85d1d1fdbfb2
Reviewed-on: https://go-review.googlesource.com/c/go/+/336692
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Currently, the ABI analysis assigns parameter/result offsets
to the fields of function *Type. In some cases, we may have
an ABI0 function reference and an ABIInternal reference share
the same function *Type. For example, for an ABI0 function F,
"f := F" will make f and (ABI0) F having the same *Type. But f,
as a func value, should use ABIInternal. Analyses on F and f will
collide and cause ICE.
Also, changing field offsets in ABI analysis has to be done very
carefully to avoid data races. It has been causing
trickiness/difficulty.
This CL removes the change of field offsets in ABI analysis
altogether. The analysis result is stored in ABIParamAssignment,
which is the only way to access parameter/result stack offset now.
Fixes#47317.
Fixes#47227.
Change-Id: I23a3e081a6cf327ac66855da222daaa636ed1ead
Reviewed-on: https://go-review.googlesource.com/c/go/+/336629
Trust: Cherry Mui <cherryyz@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Than McIntosh <thanm@google.com>
I don't know what this test is doing, but it very frequently flakes
for me while testing mundane compiler CLs. According to the issue log,
it's been flaky for ~3 years.
Updates #37331.
Change-Id: I81c43ad646ee12d4c6561290a54e4bf637695bc6
Reviewed-on: https://go-review.googlesource.com/c/go/+/336349
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
This avoids a race when a new timerModifiedEarlier timer is created by
a different goroutine.
Fixes#47329
Change-Id: I6f6c87b4a9b5491b201c725c10bc98e23e0ed9d1
Reviewed-on: https://go-review.googlesource.com/c/go/+/336432
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Make sure the instantiating types are the type parameters of the containing
function (or types derived from those).
The one exception is the argument of a OFUNCINST, whose type
parameters are those of the declaration site of the function or method
being instantiated. We skip those types.
Change-Id: I4b3ff22eb8a81a76476930cf8ed2a7dd6489d8b8
Reviewed-on: https://go-review.googlesource.com/c/go/+/336352
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
We now understand the root cause of #47227, it will be fixed in #47317.
Change-Id: Ifcd44f887a0bd3195818df33e409bd3e818e0b27
Reviewed-on: https://go-review.googlesource.com/c/go/+/336610
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Changed the implementation such that the result is a variable rather than
a constant if the argument type (or the struct in case of unsafe.Offsetof)
has a size that depends on type parameters.
Minor unrelated adjustments.
For #40301.
Change-Id: I1e988f1479b95648ad95a455c764ead829d75749
Reviewed-on: https://go-review.googlesource.com/c/go/+/335413
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
