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[torque] Add lint rules for redundant clauses

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This change adds two simple lint rules to prevent including 'generates'
or 'constexpr' clauses in cases where they have no impact on behavior.

Bug: v8:7793
Change-Id: Ib1d8fde39ca26735ff9cb7892f01e464619c2090
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2590515
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#71831}
This commit is contained in:
Seth Brenith 2020-12-14 14:56:03 -08:00 committed by Commit Bot
parent eafc0eee95
commit a14107f73d
4 changed files with 11 additions and 4 deletions
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2
src/builtins/constructor.tq
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@ -17,7 +17,7 @@ namespace constructor {
extern builtin FastNewObject(Context, JSFunction, JSReceiver): JSObject;
extern enum AllocationSiteMode constexpr 'AllocationSiteMode' {
extern enum AllocationSiteMode {
DONT_TRACK_ALLOCATION_SITE,
TRACK_ALLOCATION_SITE
}

3
src/objects/js-array.tq
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@ -2,8 +2,7 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
extern enum IterationKind extends uint31
constexpr 'IterationKind' { kKeys, kValues, kEntries }
extern enum IterationKind extends uint31 { kKeys, kValues, kEntries }
extern class JSArrayIterator extends JSObject {
iterated_object: JSReceiver;

3
src/torque/torque-parser.cc
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@ -1281,6 +1281,9 @@ base::Optional<ParseResult> MakeEnumDeclaration(
NamingConventionError("Type", name, "UpperCamelCase");
}
if (constexpr_generates_opt && *constexpr_generates_opt == name) {
Lint("Unnecessary 'constexpr' clause for enum ", name);
}
auto constexpr_generates =
constexpr_generates_opt ? *constexpr_generates_opt : name;
const bool generate_nonconstexpr = base_type_expression.has_value();

7
src/torque/type-visitor.cc
View File

@ -300,7 +300,12 @@ const ClassType* TypeVisitor::ComputeType(
if (flags & ClassFlag::kExtern) {
if (decl->generates) {
bool enforce_tnode_type = true;
generates = ComputeGeneratesType(decl->generates, enforce_tnode_type);
std::string explicit_generates =
ComputeGeneratesType(decl->generates, enforce_tnode_type);
if (explicit_generates == generates) {
Lint("Unnecessary 'generates' clause for class ", decl->name->value);
}
generates = explicit_generates;
}
if (flags & ClassFlag::kExport) {
Error("cannot export a class that is marked extern");