Add test for indexing on variables whose types are constrained to
various kinds of types.
Change-Id: I991eecfe39dba5d817c0fbe259ba558d4881ea84
Reviewed-on: https://go-review.googlesource.com/c/go/+/360867
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The types of the two interfaces should be equal, but they aren't.
We end up with multiple descriptors for a type when we need type
descriptors to be unique.
Fixes#49241
Change-Id: I8a6c70da541c6088a92a01392bc83b61cc130eba
Reviewed-on: https://go-review.googlesource.com/c/go/+/360134
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In case of reference to method call of an imported fully-instantiated
type, nameNode.Func will be nil causes checkFetchBody panic. To fix
this, make sure checkFetchBody is only called when Func is not nil.
Fixes#49246
Change-Id: I32e9208385a86d4600d8ebf6f5efd8fca571ea16
Reviewed-on: https://go-review.googlesource.com/c/go/+/360056
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Use types2.Structure() to get single underlying type of typeparams, to
handle some unusual cases where a type param is constrained to a single
underlying struct or map type.
Fixes#48538
Change-Id: I289fb7b31d489f7586f2b04aeb1df74e15a9f965
Reviewed-on: https://go-review.googlesource.com/c/go/+/359335
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We may revisit this decision in a future release. By disallowing this
for Go 1.18 we are ensuring that we don't lock in the generics design
in a place that may need to change later. (Type declarations are the
primary construct where it crucially matters what the underlying type
of a type parameter is.)
Comment out all tests that rely on this feature; add comments referring
to issue so we can find all places easily should we change our minds.
Fixes#45639.
Change-Id: I730510e4da66d3716d455a9071c7778a1e4a1152
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Now that we permit arbitrary types as constraints, we no longer need them.
For #48424
Change-Id: I15fef26a563988074650cb0801895b002c44148a
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There were two main outer switch statements in node() that can just be
combined. Also, for simplicity, changed an IsCmp() conditional into just
another case in the switch statement.
Also, the inner OCALL switch statement had a bunch of fairly duplicate
cases. Combined the cases that all had no special semantics, into a
single default case calling transformCall().
In the OCALL case in dictPass(), got rid of a check for OFUNCINST (which
will always have been removed by this point). Also, eliminated an assert
that could cause unneded failures. transformCall() should always be
called if the node op is still OCALL, so no need to assert on the ops of
call.X.
Added an extra test in issue47078.go, to explicitly check for case where
the X argument of a call is a DOTTYPE.
Change-Id: Ifb3f812ce12820a4ce08afe2887f00f7fc00cd2f
Reviewed-on: https://go-review.googlesource.com/c/go/+/358596
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To capture the fact that a method was called on a generic interface,
so we can make sure the linker doesn't throw away any implementations
that might be the method called.
See the comment in reflect.go for details.
Fixes#49049
Change-Id: I0be74b6e727c1ecefedae072b149f59d539dc1e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/357835
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Change-Id: I2fca7a801c85ed93c002c23bfcb0cf9593f1bdf4
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Make sure that an embedded field like "MyStruct[T]" works and can be
referenced via the name MyStruct.
Change-Id: I8be1f1184dd42c4e54e4144aff2fd85e30af722f
Reviewed-on: https://go-review.googlesource.com/c/go/+/356312
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Modify the phase for creating needed function/method instantiations and
modifying functions to use those instantiations, so that the phase is
self-contained and can be called again after inlining. This is to deal
with the issue that inlining may reveal new fully-instantiated types
whose methods must be instantiated.
With this change, we have an extra phase for instantiation after
inlining, to take care of the new fully-instantiated types that have
shown up during inlining. We call inline.InlineCalls() for any new
instantiated functions that are created.
Change-Id: I4ddf0b1907e5f1f7d45891db7876455a99381133
Reviewed-on: https://go-review.googlesource.com/c/go/+/352870
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Add a test for a generic sort function, operating on several different
pointer types (across two packages), so they should all share the same
shape-based instantiation. Actually check that only one instantiation of
Sort is created using 'go tool nm', and also check that the output is
correct.
In order to do the test on the executable using 'go nm', added this as a
'go test' in cmd/compile/internal/test.
Added the genembed.go test that I meant to include with a previous CL.
Change-Id: I9962913c2f1809484c2b1dfef3b07e4c8770731c
Reviewed-on: https://go-review.googlesource.com/c/go/+/354696
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In the case in (*TSubster).Type() that we were running into an
incomplete underlying type (TFORW), we should just be immediately
returning the type returned by ts.SubstForwFunc(forw), since that call
returns a proper type node, and has set up any remaining work that has
to be done when we get done with the current top-level type definition.
(For import, that function is doInst, which does an Instantiate of the
new substituted type, with the delayed part via deferredInstStack.) We
should not continue doing the later parts of (*TSubster).Type(), since
the underlying type may not yet have its methods filled in, etc.
Also, in Instantiate(), we need to put the desired new type on
deferredInstStack, even if the base type node already exists, if the
type node is in TFORW state. This is now exactly the case when
Instantiate is called from (*TSubster).Type via doInst, since
(*TSubster).Type has already called NewIncompleteNamedType().
Fixes#48716Fixes#48889
Change-Id: Icd6be5721c4ac75bf8869b8bbdeca50069d632ec
Reviewed-on: https://go-review.googlesource.com/c/go/+/355250
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For this unusual case, where a constraint specifies exactly one type, we
can have a COMPLIT expression with a type that is/has typeparams.
Therefore, we add code to delay transformCompLit for generic functions.
We also need to break out transformAddr (which corresponds to tcAddr),
and added code for delaying it as well. Also, we now need to export
generic functions containing untransformed OCOMPLIT and OKEY nodes, so
added support for that in iexport.go/iimport.go. Untransformed OKEY
nodes include an ir.Ident/ONONAME which we can now export.
Had to adjust some code/asserts in transformCompLit(), since we may now
be transforming an OCOMPLIT from an imported generic function (i.e. from
a non-local package).
Fixes#48537
Change-Id: I09e1b3bd08b4e013c0b098b8a25d082efa1fef51
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The CL 349613 causes this problem.
In fact, we want to use the outer i to find m.List[i],
but the newly created index variable i in the nearest
for range shadow the outer i.
Fixes#48838.
Change-Id: I10f0bd985340f9443eefaadda6fc56e4e7e9a10c
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Add a simple test with an exported generic function that does
recover/defer, to test that recover/defer are exported/imported
properly (and a generic function with recover/defer works fine).
Change-Id: Idc3af101cbb78fc96bf945f1f5eab2740dd8994b
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Change-Id: Icabef5cf75770ffde012b1fc785a72f53f9b2c46
Reviewed-on: https://go-review.googlesource.com/c/go/+/353669
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This change enables the relaxed syntax for constraint literals
as proposed in issue #48424 and adds a simple smoke test for
the compiler. (Most of the relevant changes are in the syntax
and types2 package which have more extensive tests for this.)
This makes it possible to experiment with the new syntax while
we contemplate the fate of #48424.
If #48424 is accepted, this change can remain. If #48424 is
not accepted, reverting this CL will remove this feature in
the compiler.
For #48424.
Change-Id: I624fbb37c2f616ee9ad692e17e4fc75c9d5b06e5
Reviewed-on: https://go-review.googlesource.com/c/go/+/353389
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When collecting type parameters, wrap constraint literals of the
form ~T or A|B into interfaces so the type checker doesn't have
to deal with these type set expressions syntactically anywhere
else but in interfaces (i.e., union types continue to appear
only as embedded elements in interfaces).
Since a type constraint doesn't need to be an interface anymore,
we can remove the respective restriction. Instead, when accessing
the constraint interface via TypeParam.iface, wrap non-interface
constraints at that point and update the constraint so it happens
only once. By computing the types sets of all type parameters at
before the end of type-checking, we ensure that type constraints
are in their final form when accessed through the API.
For #48424.
Change-Id: I3a47a644ad4ab20f91d93ee39fcf3214bb5a81f9
Reviewed-on: https://go-review.googlesource.com/c/go/+/353139
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The computation for determining the shapes to use at the top of
getInstantation was not always creating shapes with the proper indexes.
If an instantiation is being called from another instantiated function,
we cannot just copy the shape types unchanged, because their indexes may
have changed. So, for type args that already shapes, we still call
Shapify() with the correct index.
Fixes#48645
Change-Id: Ibb61c6f9a3c317220fb85135ca87eb5ad4dcff9e
Reviewed-on: https://go-review.googlesource.com/c/go/+/353030
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We currently make dictionaries contain a relocation pointing to
methods that generic code might use, so that those methods are not
deadcode eliminated. However, with inlining we can end up not using
the dictionary, making the reference from the dictionary to the method
no longer keep the method alive.
Fix this by keeping the dictionary alive at generic interface call sites.
It's a bit of overkill, as we only need to keep the dictionary statically
alive. We don't actually need it dynamically alive, which is what KeepAlive
does. But it works. It ends up generating a LEAQ + stack spill that aren't
necessary, but that's pretty low overhead.
To make this work, I needed to stop generating methods on shape types.
We should do this anyway, as we shouldn't ever need them. But currently
we do use them! issue44688.go has a test that only works because it calls
a method on a shape type. I've disabled that test for now, will work on it
in a subsequent CL.
Fixes#48047
Change-Id: I78968868d6486c1745f51b8b43be0898931432a2
Reviewed-on: https://go-review.googlesource.com/c/go/+/349169
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In CL 349613,we have supported types.IdentityStrict() that does strict
type comparison.
Therefore, OCONVNOP becomes a possible case in call.X.Op().
Fixes#48604
Change-Id: Ibab27ffcf09656e3380314662f05f38294c1c6ed
Reviewed-on: https://go-review.googlesource.com/c/go/+/351857
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For #48617
Change-Id: I6c00b7912c441ac323a0adede63b7d4a9ae6f92d
Reviewed-on: https://go-review.googlesource.com/c/go/+/351858
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In CL 349614. we removed the early transformation code that
was needed to create the implicit CONVIFACE nodes.
Because the transformCall function is not called when translating OFUNCINST.
So we add in needed CONVIFACE nodes via typecheckaste().
Fixes#48598
Change-Id: If9dc7040cdc38ef2e52fdbb08c840095651426f2
Reviewed-on: https://go-review.googlesource.com/c/go/+/351856
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Deal correctly with a blank local variable with type param type. This is
a special case, because a blank local variable is not in the fn.Dcl
list. In this case, we must explicitly create a new blank node with the
correct substituted type, so we have correct types if the blank local
variable has an initializing assignment.
Fixes#48602
Change-Id: I903ea44b29934e180404e32800773b7309bf297b
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The delayTransform only checks whether ir.CurFunc is generic function or
not. but when compiling a non-generic closure inside a generic function,
we also want to delay the transformation, which delayTransform fails to
detect, since when ir.CurFunc is the closure, not the top level function.
Instead, we must rely on irgen.topFuncIsGeneric field to decide whether
to delay the transformation, the same logic with what is being done for
not adding closure inside a generic function to g.target.Decls list.
Fixes#48609
Change-Id: I5bf5592027d112fe8b19c92eb906add424c46507
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In markType() in crawler.go, mark the type of a unexported field if it
is a fully-instantiated type, since we create and instantiate the
methods of any fully-instantiated type that we see during import. As
before, we still do not mark the type of an unexported field if that
type is not generic. Fixes#48454 and most recent issue described in
48337. The included test is similar to the case in 48454.
Fixes#48454Fixes#48337
Change-Id: I77a2a62b9e2647876facfa6f004201e8f699c905
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Adjust types2 and go/types and some test cases.
Because `any` is not treated specially anymore in constraint
position we get additional errors in constraints if `any` is
used before Go1.18 (in addition to the error that type parameter
lists are not permitted before Go1.18).
Fixes#33232.
Change-Id: I85590c6094b07c3e494fef319e3a38d0217cf6f0
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xml names can't have any of '[],' in them, which might appear in
generic type names. Truncate at the first '[' so the names are still valid.
Fixes#48318
Change-Id: I110ff4269f763089467e7cf84b0f0c5075fb44b7
Reviewed-on: https://go-review.googlesource.com/c/go/+/349349
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When going to dictionary formats derived from the function
instantiations, I had broken out noder.Assignop() to deal specially with
shape types, but didn't quite get the tricky case right. We still need
to allow conversion between shape types, but if the destination is an
interface, we need to use CONVIFACE rather than CONVNOP.
Fixes#48453.
Change-Id: I8c4b39c2e628172ac34f493f1dd682cbac1e55ae
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As with other recent issues, the Init field of a range loop was not
being handled properly. Generally, it is much better to explicitly
import/export the Init statements, else they are incorrectly added
before the associated node, rather than as the Init value of the node.
This was causing labels to not be correctly added to the range loop that
it is immediately preceding.
Made the ORANGE handling completely similar to the OFOR handling.
Fixes#48462
Change-Id: I999530e84f9357f81deaa3dda50660061f710e7c
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This also requires that we sometimes delay transformSelect(), if the
assignments in the Comm part of the select have not been transformed.
Fixes#48137
Change-Id: I163aa1f999d1e63616280dca807561b12b2aa779
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There are a bunch of nodes beside ONAME and OTYPE, (such as OSTRUCTLIT
and OCOMPLIT) which can introduce a generic type that we need to mark.
So, just mark any generic type on any node in markInlBody. In this
particular issue, the type is introduced by an OSTRUCTLIT node.
Updates #48337
Change-Id: I271932518f0c1fb54d91a603e01a855c69df631d
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Move ShapePkg to types, and change types.NewNamed to automatically set
IsShape/HasShape if a type is in the shapes pkg. This means that
imported shape types will automatically have the correct
IsShape/HasShape flags, even though we are not explicitly
exporting/importing those flags.
Updates #48337
Change-Id: I8b6131a663205f73f395943c9d0c8bdb2a213401
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This is a port of CL 349009 to typecheck importer.
Fixes#48306
Change-Id: Iec3f078089346bd85f0ab739896e079940325011
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The importReader always reads type parameter before declaring type stub
declaration. Thus, for recursive type, the type parameter is going to be
read twice, cause the bound more than once error.
To fix this, only read the type parameter after declaring stub obj, thus
r.doDecl can see the type was already inserted and terminate the
recursive call earlier.
Fixes#48280
Change-Id: I272e2f214f739fb8ec71a8628ba297477e1b7755
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Fixes#48317
Change-Id: I756ae6253022870071004332dd8f49169307f7e6
Reviewed-on: https://go-review.googlesource.com/c/go/+/349013
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If closure in a global assignment and has a method receiver.
We should assign receiver as a global variable, not a local variable.
Fixes#48225
Change-Id: I8f65dd6e8baf66a5eff24028d28ad0a594091add
Reviewed-on: https://go-review.googlesource.com/c/go/+/348512
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gri@ reports that types2 now correctly handles when type parameters
recursively refer back to the parameterized type, so we might as well
add tests to exercise that. Unified IR also correctly handles
importing and exporting these types, but -G=3 currently does not.
Updates #46461.
Change-Id: I272102aa08c40c980b9aeeca9f834291dfbbcc3e
Reviewed-on: https://go-review.googlesource.com/c/go/+/348738
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A generic conversion might be required for when converting T->interface{}.
When stenciled with T=interface{}, then that conversion doesn't need
to do anything.
Fixes#48276
Change-Id: Ife65d01c99fbd0895cb7eec79df9e93e752b1fa5
Reviewed-on: https://go-review.googlesource.com/c/go/+/348736
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CL 347529 broke the longtest builders due to missing -G=3 flag when
compiling the added test.
Change-Id: I73007801dd6871a8cf3554e957d247f5f56fd641
Reviewed-on: https://go-review.googlesource.com/c/go/+/348330
Trust: Tobias Klauser <tobias.klauser@gmail.com>
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When reading body of inlining function, which has another inlined
function in the body, the reader still add this inlined function to
todoBodies, which it shouldn't because the inlined function was read
already.
To fix this, introduce new flag to signal that we are done construting
all functions in todoBodies, thus the addBody shouldn't add anything
to todoBodies then.
Updates #48094
Change-Id: I45105dd518f0a7b69c6dcbaf23b957623f271203
Reviewed-on: https://go-review.googlesource.com/c/go/+/347529
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In case of embedded field, if the receiver was fully instantiated, we
must use its instantiated type, instead of passing the type params of
the base receiver.
Fixes#47797Fixes#48253
Change-Id: I97613e7e669a72605137e82406f7bf5fbb629378
Reviewed-on: https://go-review.googlesource.com/c/go/+/348549
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Added new function earlyTransformAssign() to add needed CONVIFACE nodes
due to assignments in generic functions.
Fixes#48049
Change-Id: I7cd9cee6ecf34ed2ef0743d1b17645b9f520fa00
Reviewed-on: https://go-review.googlesource.com/c/go/+/347914
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We had code in NewPtr() to set the HasTParam/HasShape flag as needed for
the cached ptr element if it wasn't set correctly based on its Elem.
This was causing the race mentioned in the issue.
But that setting code is no longer needed, as long as we call
SetRParams() soon after calling NewIncompleteNamedType(), before
creating/translating the underlying type (which we do). The
HasTParam/HasShape attribute can only come from setting of rparams or a
direct typeparam/shape somewhere in the underlying type, both of which
don't depend on recursion, etc. (as long as the rparams are set early).
Added a check that HasTParam/HasShape are set correctly for the cached
pointer/slice elems in NewPtr() and NewSlice().
Fixes#48191
Change-Id: Ide7d82efb77ae97901e75b2e6c65bd1bfc25e0ee
Reviewed-on: https://go-review.googlesource.com/c/go/+/348089
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We should be putting a newly instantiated imported type in
Instantiate/doInst onto the instTypeList, so its methods/dictionaries
are instantiated. To do this, we needed a more general way to add a
type to instTypeList, so add NeedInstType(), analogous to
NeedRuntimeType(). This has the extra advantage that now all types
created by the type substituter are added to instTypeList without any
extra code, which was easy to forget. doInst() now correctly calls
NeedInstType().
This is a bit aggressive, since a fully instantiated type in a generic
function/method may never be used, if the generic method is never
instantiated in the local package. But it should be fairly uncommon for
a generic method to mention a fully instantiated type (but it does
happen in this bug).
Fixes both cases mentioned in the bug.
Fixed#48185
Change-Id: I19b5012dfac17e306c8005f8595a648b0ab280d0
Reviewed-on: https://go-review.googlesource.com/c/go/+/347909
Trust: Dan Scales <danscales@google.com>
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For lazy import resolution, there's reentrancy issue with (*Named).load
method, when "t.resolve(t)" can lead us to the same named type, thus
(*Named).load is called recursively, causing the deadlock.
The main problem is that when instantinate a type, we calculate the type
hashing, including TParams. Calling t.TParams().Len() triggers the
reentrancy call to "(*Named).load".
To fix this, just not checking TParams().Len() if we are hashing.
Updates #48185
Change-Id: Ie34842d7b10fad5d11fbcf75bb1c64a89deac6b8
Reviewed-on: https://go-review.googlesource.com/c/go/+/347534
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Now we have two functions that create names for instantiated types.
They are inconsistent when dealing with byte/rune type.
This CL makes instTypeName2 reuse the code of typecheck.InstTypeName
Fixes#48198
Change-Id: I4c216b532cba6618ef9b63fd0b76e8f1c0ed7a75
Reviewed-on: https://go-review.googlesource.com/c/go/+/347491
Reviewed-by: Dan Scales <danscales@google.com>
Trust: Dan Scales <danscales@google.com>
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