Moving Frame-inspection functionality to Torque is a prerequisite
for porting the CSA-based arguments code, which is a great candidate
to simplify/cleanup with Torque.
Change-Id: I1f4cb94cb357aae5864c2e84f3bf5a07549b27f8
Reviewed-on: https://chromium-review.googlesource.com/c/1357050
Commit-Queue: Daniel Clifford <danno@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58106}
+ fixing other files which were depending on context-inl.h pulling in the
missing includes.
BUG=v8:7490,v8:8238
Change-Id: I90d37599bdfb69ac8fd7e62b8fb78d9d77c77234
Reviewed-on: https://chromium-review.googlesource.com/c/1349277
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57775}
This enables more seamless interop between Torque and CSA:
Since CodeStubAssembler can now inherit from the Torque base namespace,
macros defined in the base namespace can be used in CodeStubAssembler
macros, even without qualification.
At the same time, macros in the base namespace can refer to
CodeStubAssembler macros. The only new limitation is that types defined
in code-stub-assembler.h cannot be referenced in the signature of macros
defined in the base namespace, since this would produce a cyclic header
dependency. A work-around for this woud be to put such types (like int31
in this CL) into a separate header included by both. I (mis-)used
code-assembler.h for that.
Another side-effec is that types and enums defined in CodeStubAssembler
have to be accessed in a qualified way from Torque.
Other assemblers can now inherit from their Torque equivalent, so
porting macros into the corresponding Torque namespace doesn't require
any change to the existing use-sites.
To avoid C++ ambiguities, the Torque-generated assemblers must not define
anything also defined in Code(Stub)Assembler. This includes the type
aliases for TNode, PLabel, ...
My workaround is to qualify everything in the generated C++.
As a drive-by fix, I had to change the formatter to avoid a situation
where it doesn't compute a fixed point: putting a keyword at the
beginning of a line removes the '\s' in front of it, so I replaced that
with '\b'.
Bug: v8:7793
Change-Id: If3b9e9ad967a181b380a10d5673615606abd1041
Reviewed-on: https://chromium-review.googlesource.com/c/1341955
Reviewed-by: Daniel Clifford <danno@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57645}
This introduces a new syntax for identifiers and calls: modulename::foo.
Such a name is resolved by trying to find a module modulename in one of
the parent scopes and looking for foo there. So this roughly corresponds
to C++ qualified namespace lookup.
Bug: v8:7793
Change-Id: Iedc43e6ebe125cd74575cbbcbf990bbcc0155a1f
Reviewed-on: https://chromium-review.googlesource.com/c/1309818
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57238}
This is a reland of 0f15ed05b9
Original change's description:
> [torque]: Implement catch handlers for try blocks
>
> In addition (and in combination), try statements now support "catch"
> clauses at the end that catch JavaScript exceptions throw by any builtin
> or runtime function contained in the try block:
>
> try {
> ThrowTypeError(context, ...);
> }
> catch (e) {
> // e has type Object
> }
>
> Bug: v8:7793
> Change-Id: Ie285ff888c49c112276240f7360f70c8b540ed19
> Reviewed-on: https://chromium-review.googlesource.com/c/1302055
> Commit-Queue: Daniel Clifford <danno@chromium.org>
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#57169}
Bug: v8:7793
Change-Id: I3c4182303acfdfa625654976bec372cf531d954f
Reviewed-on: https://chromium-review.googlesource.com/c/1310295
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57184}
In addition (and in combination), try statements now support "catch"
clauses at the end that catch JavaScript exceptions throw by any builtin
or runtime function contained in the try block:
try {
ThrowTypeError(context, ...);
}
catch (e) {
// e has type Object
}
Bug: v8:7793
Change-Id: Ie285ff888c49c112276240f7360f70c8b540ed19
Reviewed-on: https://chromium-review.googlesource.com/c/1302055
Commit-Queue: Daniel Clifford <danno@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57169}
In the process:
- Convert TryLabelStatements into TryLabelExpressions
- Change TryLabelExpressions to support only single label blocks and de-sugar
try/labels into nested try/label statements. This allows the code in a label
block to goto subsequent labels in the same try/label statement.
- Make otherwise expressions either take IdentifierExpressions which get
converted into simple label names OR atomarStatements, which make useful
non-label operations, like 'break' and 'continue', useful together with
otherwise. Non-label otherwise statements get de-sugared into try/label
blocks.
Bug: v8:7793
Change-Id: Ie56ede6306e2a3182f6aa1bb8750ed418bda01db
Reviewed-on: https://chromium-review.googlesource.com/c/1266997
Commit-Queue: Daniel Clifford <danno@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56447}
This CL makes sure, that logical operators (||, &&) always have return
type never. Together with a check that never is never passed as a
function argument, this prevents faulty evaluation as in !(x || y).
Before, the logical operators had a behavior similar to
(bool labels Taken, NotTaken), with a fast exit if the left-hand side
allowed shor-circuit evaluation, but returning the right-hand side
otherwise. Since we want to allow existing (a || b || c) patterns in
the codebase, this requires weakening the restriction that the left-
and right-hand side need to have the same type. Now the possibilites
are:
bool, never
never, bool
never, never
bool, bool
constexpr bool, constexpr bool
Bug: v8:8137
Change-Id: I9576b337dc4008ac58b4625e77fef4e73bcdd6e3
Reviewed-on: https://chromium-review.googlesource.com/1215162
Reviewed-by: Daniel Clifford <danno@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55750}
This adds a typeswitch statement
typeswitch (e)
case (x1 : Type1) {
...
} case (x2 : Type2) {
} ...
... case (xn : TypeN) {
...
}
This checks to which of the given types the result of evaluating e can
be cast, in the order in which they are listed. So if an earlier
type matches, a value of this type won't reach a later case.
The type-checks are performed by calling the cast<T>() macro.
The type of the argument passed to the cast macro is dependent on the
case and excludes all types checked earlier. For example, in
const x : Object = ...
typeswitch (x)
case (x : Smi) {
...
} case (x : HeapNumber) {
...
} case (x : HeapObject) {
...
}
there will be calls to cast<Smi>(Object) and
cast<HeapNumber>(HeapObject), because after the Smi check we know that
x has to be a HeapObject. With the refactored base.tq definition of
cast, this will generate efficient code and avoid repeating the Smi
check in the second case.
The type system ensures that all cases are reachable and that the type
given to the last case is safe without a runtime check (in other words,
the union of all checked types covers the type of e).
The cases can also be written as
case (Type) { ... }
, in which case the switched value is not re-bound with the checked
type.
Bug: v8:7793
Change-Id: Iea4aed7465d62b445e3ae0d33f52921912e095e3
Reviewed-on: https://chromium-review.googlesource.com/1156506
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54958}
Previously, we requested instantiation of generics prior to selecting
a template overload, which resulted in unused templates being
instantiated, possibly triggering unnecessary compile errors.
Bug: v8:7793
Change-Id: I45f4bdbf8aa93749ece416c6c7458d64e6e051f5
Reviewed-on: https://chromium-review.googlesource.com/1154977
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54950}
This CL changes the for-loop so all parts are optional, allowing
loops like:
for (;;) {}
for (;; ++i) {}
...
R=danno@chromium.org, tebbi@chromium.org
Bug: v8:7793
Change-Id: I7bf9ef9e59d55eb9ae9f38904a1c1106ae50df5a
Reviewed-on: https://chromium-review.googlesource.com/1152727
Commit-Queue: Simon Zünd <szuend@google.com>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54752}
This CL adds local const bindings. This means that instead of
generating TVARIABLEs for variables, we can generate simple TNodes.
Example:
macro FooBar(): {
const kSomeSmi: Smi = 10;
...
}
This CL also enforces that variables with a constexpr type are bound
using 'const' and not 'let'.
R=tebbi@chromium.org
Bug: v8:7793
Change-Id: Id20a18149df9fc374ce718bdb1478e3eabb6e6df
Reviewed-on: https://chromium-review.googlesource.com/1138316
Commit-Queue: Simon Zünd <szuend@google.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54479}
This CL adds constants that can be defined in the module scope:
const kConstexprConst: constexpr int31 = 5;
const kIntptrConst: intptr = 4;
const kSmiConst: Smi = 3;
They are implemented by generating "mini-macros" that return the
expression on the right-hand side of the assignment.
Bug: v8:7793
Change-Id: I0a476cb3111707fad56bf15e9547b377c7adab37
Reviewed-on: https://chromium-review.googlesource.com/1114745
Commit-Queue: Simon Zünd <szuend@google.com>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54430}
Variables/return values with constexpr type cannot have multiple
assignments. We check this now.
For conditionals, it is important to always infer a non-constexpr type.
This CL adds the ability to map any type (including union types) to be
mapped to their non-constexpr variant. Conditionals infer their type as
the non-constexpr version of a combination of the two branch types.
In addition, this improves subtyping for constexpr types:
If A extends B, then constexpr A extends constexpr B.
This makes it necessary to clean up "constexpr String", which has nothing
to do with tagged values.
Bug: v8:7793
Change-Id: Ia4d3cd5dc98f45b0ec89adf05c5c6111a0e51cc6
Reviewed-on: https://chromium-review.googlesource.com/1122864
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54167}
This CL is a proposal to add "checked" casts (CAST in CSA) to the Torque language.
The CL adds the "unsafe_cast<>" operator that emits a "CAST".
Example:
let n: Number = ...;
...
if (TaggedIsSmi(n)) {
let m: Smi = unsafe_cast<Smi>(n);
...
}
The cast wont incur a runtime overhead now.
R=tebbi@chromium.org
Change-Id: I9fca90d1d11e61617ba0270e5022fd66200e2195
Reviewed-on: https://chromium-review.googlesource.com/1070151
Commit-Queue: Simon Zünd <szuend@google.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53416}
This CL adds grammar support for function pointers to generic builtins.
It also instantiates generic specializations when they are only used
in an assignment to a function pointer.
Example:
builtin GenericBuiltinTest<T: type>(c: Context, param: T): Object {
return Null;
}
let fnptr: builtin(Context, Smi) => Object = GenericBuiltinTest<Smi>;
Change-Id: Ib7e5f47ffc05f14eb5d0b789936587263dfb961d
Reviewed-on: https://chromium-review.googlesource.com/1068731
Commit-Queue: Simon Zünd <szuend@google.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53284}
This CL adds the new type expression
builtin(Context, ArgType1, ...) => ReturnType
and allows to use Torque-defined builtins as values of this type, as well
as calling values of this type.
The new function pointer types are subtypes of Code.
Change-Id: Ib7ba3ce6ef7a8591a4c79230dd189fd25698d5b9
Reviewed-on: https://chromium-review.googlesource.com/1060056
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53217}
This CL changes the generated C++ code for LabeledStatementBlocks to
only emit labels if they are used.
Prior to this CL, when a label was only used on one path of an
if constexpr expression, and not at all anywhere else,
the try/label construct would BIND a label that was not used,
causing a CSA verification error.
R=tebbi@chromium.org
Change-Id: Ia81a0cd081b84528c95bbdbdb98b9ab51928e13f
Reviewed-on: https://chromium-review.googlesource.com/1057247
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Commit-Queue: Simon Zünd <szuend@google.com>
Cr-Commit-Position: refs/heads/master@{#53173}
Change-Id: I37ed9115c099f3d17f23a26348a1bbf5f773ee32
Reviewed-on: https://chromium-review.googlesource.com/1056668
Reviewed-by: Daniel Clifford <danno@chromium.org>
Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
Cr-Commit-Position: refs/heads/master@{#53136}
In the process, add a few simple tests for "constexpr" expressions, which
identified a few bugs that are also fixed in this CL.
Change-Id: I97486c781572642d2b574b92133b1f9cda3db592
Reviewed-on: https://chromium-review.googlesource.com/1055493
Commit-Queue: Daniel Clifford <danno@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53135}
