[clang] 5518a9d - [c++20] P1907R1: Support for generalized non-type template arguments of scalar type. (#78041)
via cfe-commits
cfe-commits at lists.llvm.org
Sun Jan 21 12:29:05 PST 2024
Author: Andrey Ali Khan Bolshakov
Date: 2024-01-21T21:28:57+01:00
New Revision: 5518a9d7673bfe55b4110bea049140316d032fbf
URL: https://github.com/llvm/llvm-project/commit/5518a9d7673bfe55b4110bea049140316d032fbf
DIFF: https://github.com/llvm/llvm-project/commit/5518a9d7673bfe55b4110bea049140316d032fbf.diff
LOG: [c++20] P1907R1: Support for generalized non-type template arguments of scalar type. (#78041)
Previously committed as 9e08e51a20d0d2b1c5724bb17e969d036fced4cd, and
reverted because a dependency commit was reverted, then committed again
as 4b574008aef5a7235c1f894ab065fe300d26e786 and reverted again because
"dependency commit" 5a391d38ac6c561ba908334d427f26124ed9132e was
reverted. But it doesn't seem that 5a391d38ac6c was a real dependency
for this.
This commit incorporates 4b574008aef5a7235c1f894ab065fe300d26e786 and
18e093faf726d15f210ab4917142beec51848258 by Richard Smith (@zygoloid),
with some minor fixes, most notably:
- `UncommonValue` renamed to `StructuralValue`
- `VK_PRValue` instead of `VK_RValue` as default kind in lvalue and
member pointer handling branch in
`BuildExpressionFromNonTypeTemplateArgumentValue`;
- handling of `StructuralValue` in `IsTypeDeclaredInsideVisitor`;
- filling in `SugaredConverted` along with `CanonicalConverted`
parameter in `Sema::CheckTemplateArgument`;
- minor cleanup in
`TemplateInstantiator::transformNonTypeTemplateParmRef`;
- `TemplateArgument` constructors refactored;
- `ODRHash` calculation for `UncommonValue`;
- USR generation for `UncommonValue`;
- more correct MS compatibility mangling algorithm (tested on MSVC ver.
19.35; toolset ver. 143);
- IR emitting fixed on using a subobject as a template argument when the
corresponding template parameter is used in an lvalue context;
- `noundef` attribute and opaque pointers in `template-arguments` test;
- analysis for C++17 mode is turned off for templates in
`warn-bool-conversion` test; in C++17 and C++20 mode, array reference
used as a template argument of pointer type produces template argument
of UncommonValue type, and
`BuildExpressionFromNonTypeTemplateArgumentValue` makes
`OpaqueValueExpr` for it, and `DiagnoseAlwaysNonNullPointer` cannot see
through it; despite of "These cases should not warn" comment, I'm not
sure about correct behavior; I'd expect a suggestion to replace `if` by
`if constexpr`;
- `temp.arg.nontype/p1.cpp` and `dr18xx.cpp` tests fixed.
Added:
clang/test/CodeGenCXX/template-arguments.cpp
clang/test/Index/USR/structural-value-tpl-arg.cpp
Modified:
clang-tools-extra/clangd/DumpAST.cpp
clang-tools-extra/clangd/FindTarget.cpp
clang/docs/ReleaseNotes.rst
clang/include/clang/AST/ODRHash.h
clang/include/clang/AST/PropertiesBase.td
clang/include/clang/AST/RecursiveASTVisitor.h
clang/include/clang/AST/TemplateArgumentVisitor.h
clang/include/clang/AST/TemplateBase.h
clang/include/clang/Basic/DiagnosticSemaKinds.td
clang/include/clang/Sema/Sema.h
clang/lib/AST/ASTContext.cpp
clang/lib/AST/ASTImporter.cpp
clang/lib/AST/ASTStructuralEquivalence.cpp
clang/lib/AST/Decl.cpp
clang/lib/AST/ItaniumMangle.cpp
clang/lib/AST/MicrosoftMangle.cpp
clang/lib/AST/ODRHash.cpp
clang/lib/AST/StmtProfile.cpp
clang/lib/AST/TemplateBase.cpp
clang/lib/AST/TypeLoc.cpp
clang/lib/CodeGen/CGDebugInfo.cpp
clang/lib/CodeGen/CGExpr.cpp
clang/lib/Index/USRGeneration.cpp
clang/lib/Sema/SemaLookup.cpp
clang/lib/Sema/SemaOverload.cpp
clang/lib/Sema/SemaTemplate.cpp
clang/lib/Sema/SemaTemplateDeduction.cpp
clang/lib/Sema/SemaTemplateInstantiate.cpp
clang/lib/Sema/SemaTemplateVariadic.cpp
clang/lib/Sema/TreeTransform.h
clang/lib/Serialization/ASTReader.cpp
clang/lib/Serialization/ASTWriter.cpp
clang/test/CXX/drs/dr18xx.cpp
clang/test/CXX/temp/temp.arg/temp.arg.nontype/p1.cpp
clang/test/CodeGenCXX/mangle-ms-templates.cpp
clang/test/CodeGenCXX/mangle-template.cpp
clang/test/Modules/odr_hash.cpp
clang/test/SemaCXX/warn-bool-conversion.cpp
clang/test/SemaTemplate/temp_arg_nontype_cxx1z.cpp
clang/test/SemaTemplate/temp_arg_nontype_cxx20.cpp
clang/tools/libclang/CIndex.cpp
clang/tools/libclang/CXCursor.cpp
clang/www/cxx_status.html
lldb/include/lldb/lldb-enumerations.h
lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp
Removed:
################################################################################
diff --git a/clang-tools-extra/clangd/DumpAST.cpp b/clang-tools-extra/clangd/DumpAST.cpp
index b0cec65c39fa31..9a525efb938e8d 100644
--- a/clang-tools-extra/clangd/DumpAST.cpp
+++ b/clang-tools-extra/clangd/DumpAST.cpp
@@ -143,6 +143,7 @@ class DumpVisitor : public RecursiveASTVisitor<DumpVisitor> {
TEMPLATE_ARGUMENT_KIND(Declaration);
TEMPLATE_ARGUMENT_KIND(Template);
TEMPLATE_ARGUMENT_KIND(TemplateExpansion);
+ TEMPLATE_ARGUMENT_KIND(StructuralValue);
#undef TEMPLATE_ARGUMENT_KIND
}
llvm_unreachable("Unhandled ArgKind enum");
diff --git a/clang-tools-extra/clangd/FindTarget.cpp b/clang-tools-extra/clangd/FindTarget.cpp
index 3d73e77b16aff4..e702c6b3537a09 100644
--- a/clang-tools-extra/clangd/FindTarget.cpp
+++ b/clang-tools-extra/clangd/FindTarget.cpp
@@ -1039,6 +1039,7 @@ class ExplicitReferenceCollector
case TemplateArgument::Pack:
case TemplateArgument::Type:
case TemplateArgument::Expression:
+ case TemplateArgument::StructuralValue:
break; // Handled by VisitType and VisitExpression.
};
return RecursiveASTVisitor::TraverseTemplateArgumentLoc(A);
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 28fd79abbe782a..dc31594e4b040e 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -183,6 +183,9 @@ C++ Language Changes
C++20 Feature Support
^^^^^^^^^^^^^^^^^^^^^
+- Implemented `P1907R1 <https://wg21.link/P1907R1>` which extends allowed non-type template argument
+ kinds with e.g. floating point values and pointers and references to subobjects.
+ This feature is still experimental. Accordingly, `__cpp_nontype_template_args` was not updated.
C++23 Feature Support
^^^^^^^^^^^^^^^^^^^^^
diff --git a/clang/include/clang/AST/ODRHash.h b/clang/include/clang/AST/ODRHash.h
index cedf644520fc32..a1caa6d39a87c3 100644
--- a/clang/include/clang/AST/ODRHash.h
+++ b/clang/include/clang/AST/ODRHash.h
@@ -25,6 +25,7 @@
namespace clang {
+class APValue;
class Decl;
class IdentifierInfo;
class NestedNameSpecifier;
@@ -101,6 +102,8 @@ class ODRHash {
// Save booleans until the end to lower the size of data to process.
void AddBoolean(bool value);
+ void AddStructuralValue(const APValue &);
+
static bool isSubDeclToBeProcessed(const Decl *D, const DeclContext *Parent);
private:
diff --git a/clang/include/clang/AST/PropertiesBase.td b/clang/include/clang/AST/PropertiesBase.td
index d86c4eba6a2251..0270c086d06b6a 100644
--- a/clang/include/clang/AST/PropertiesBase.td
+++ b/clang/include/clang/AST/PropertiesBase.td
@@ -808,6 +808,20 @@ let Class = PropertyTypeCase<TemplateArgument, "Integral"> in {
return TemplateArgument(ctx, value, type, isDefaulted);
}]>;
}
+let Class = PropertyTypeCase<TemplateArgument, "StructuralValue"> in {
+ def : Property<"value", APValue> {
+ let Read = [{ node.getAsStructuralValue() }];
+ }
+ def : Property<"type", QualType> {
+ let Read = [{ node.getStructuralValueType() }];
+ }
+ def : Property<"isDefaulted", Bool> {
+ let Read = [{ node.getIsDefaulted() }];
+ }
+ def : Creator<[{
+ return TemplateArgument(ctx, type, value, isDefaulted);
+ }]>;
+}
let Class = PropertyTypeCase<TemplateArgument, "Template"> in {
def : Property<"name", TemplateName> {
let Read = [{ node.getAsTemplateOrTemplatePattern() }];
diff --git a/clang/include/clang/AST/RecursiveASTVisitor.h b/clang/include/clang/AST/RecursiveASTVisitor.h
index 8f2714e142bbe3..2aee6a947141b6 100644
--- a/clang/include/clang/AST/RecursiveASTVisitor.h
+++ b/clang/include/clang/AST/RecursiveASTVisitor.h
@@ -850,6 +850,7 @@ bool RecursiveASTVisitor<Derived>::TraverseTemplateArgument(
case TemplateArgument::Declaration:
case TemplateArgument::Integral:
case TemplateArgument::NullPtr:
+ case TemplateArgument::StructuralValue:
return true;
case TemplateArgument::Type:
@@ -882,6 +883,7 @@ bool RecursiveASTVisitor<Derived>::TraverseTemplateArgumentLoc(
case TemplateArgument::Declaration:
case TemplateArgument::Integral:
case TemplateArgument::NullPtr:
+ case TemplateArgument::StructuralValue:
return true;
case TemplateArgument::Type: {
diff --git a/clang/include/clang/AST/TemplateArgumentVisitor.h b/clang/include/clang/AST/TemplateArgumentVisitor.h
index 190aa97adf4551..cf0d3220158063 100644
--- a/clang/include/clang/AST/TemplateArgumentVisitor.h
+++ b/clang/include/clang/AST/TemplateArgumentVisitor.h
@@ -37,6 +37,7 @@ class Base {
DISPATCH(Declaration);
DISPATCH(NullPtr);
DISPATCH(Integral);
+ DISPATCH(StructuralValue);
DISPATCH(Template);
DISPATCH(TemplateExpansion);
DISPATCH(Expression);
@@ -59,6 +60,7 @@ class Base {
VISIT_METHOD(Declaration);
VISIT_METHOD(NullPtr);
VISIT_METHOD(Integral);
+ VISIT_METHOD(StructuralValue);
VISIT_METHOD(Template);
VISIT_METHOD(TemplateExpansion);
VISIT_METHOD(Expression);
diff --git a/clang/include/clang/AST/TemplateBase.h b/clang/include/clang/AST/TemplateBase.h
index b7cd71f17c9442..fea2c8ccfee675 100644
--- a/clang/include/clang/AST/TemplateBase.h
+++ b/clang/include/clang/AST/TemplateBase.h
@@ -50,6 +50,7 @@ template <> struct PointerLikeTypeTraits<clang::Expr *> {
namespace clang {
+class APValue;
class ASTContext;
class Expr;
struct PrintingPolicy;
@@ -80,6 +81,13 @@ class TemplateArgument {
/// that was provided for an integral non-type template parameter.
Integral,
+ /// The template argument is a non-type template argument that can't be
+ /// represented by the special-case Declaration, NullPtr, or Integral
+ /// forms. These values are only ever produced by constant evaluation,
+ /// so cannot be dependent.
+ /// TODO: merge Declaration, NullPtr and Integral into this?
+ StructuralValue,
+
/// The template argument is a template name that was provided for a
/// template template parameter.
Template,
@@ -130,6 +138,14 @@ class TemplateArgument {
};
void *Type;
};
+ struct V {
+ LLVM_PREFERRED_TYPE(ArgKind)
+ unsigned Kind : 31;
+ LLVM_PREFERRED_TYPE(bool)
+ unsigned IsDefaulted : 1;
+ APValue *Value;
+ void *Type;
+ };
struct A {
LLVM_PREFERRED_TYPE(ArgKind)
unsigned Kind : 31;
@@ -156,11 +172,19 @@ class TemplateArgument {
union {
struct DA DeclArg;
struct I Integer;
+ struct V Value;
struct A Args;
struct TA TemplateArg;
struct TV TypeOrValue;
};
+ void initFromType(QualType T, bool IsNullPtr, bool IsDefaulted);
+ void initFromDeclaration(ValueDecl *D, QualType QT, bool IsDefaulted);
+ void initFromIntegral(const ASTContext &Ctx, const llvm::APSInt &Value,
+ QualType Type, bool IsDefaulted);
+ void initFromStructural(const ASTContext &Ctx, QualType Type,
+ const APValue &V, bool IsDefaulted);
+
public:
/// Construct an empty, invalid template argument.
constexpr TemplateArgument() : TypeOrValue({Null, 0, /* IsDefaulted */ 0}) {}
@@ -168,25 +192,22 @@ class TemplateArgument {
/// Construct a template type argument.
TemplateArgument(QualType T, bool isNullPtr = false,
bool IsDefaulted = false) {
- TypeOrValue.Kind = isNullPtr ? NullPtr : Type;
- TypeOrValue.IsDefaulted = IsDefaulted;
- TypeOrValue.V = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr());
+ initFromType(T, isNullPtr, IsDefaulted);
}
- /// Construct a template argument that refers to a
- /// declaration, which is either an external declaration or a
- /// template declaration.
+ /// Construct a template argument that refers to a (non-dependent)
+ /// declaration.
TemplateArgument(ValueDecl *D, QualType QT, bool IsDefaulted = false) {
- assert(D && "Expected decl");
- DeclArg.Kind = Declaration;
- DeclArg.IsDefaulted = IsDefaulted;
- DeclArg.QT = QT.getAsOpaquePtr();
- DeclArg.D = D;
+ initFromDeclaration(D, QT, IsDefaulted);
}
/// Construct an integral constant template argument. The memory to
/// store the value is allocated with Ctx.
- TemplateArgument(ASTContext &Ctx, const llvm::APSInt &Value, QualType Type,
+ TemplateArgument(const ASTContext &Ctx, const llvm::APSInt &Value,
+ QualType Type, bool IsDefaulted = false);
+
+ /// Construct a template argument from an arbitrary constant value.
+ TemplateArgument(const ASTContext &Ctx, QualType Type, const APValue &Value,
bool IsDefaulted = false);
/// Construct an integral constant template argument with the same
@@ -297,7 +318,7 @@ class TemplateArgument {
/// Retrieve the type for a type template argument.
QualType getAsType() const {
assert(getKind() == Type && "Unexpected kind");
- return QualType::getFromOpaquePtr(reinterpret_cast<void*>(TypeOrValue.V));
+ return QualType::getFromOpaquePtr(reinterpret_cast<void *>(TypeOrValue.V));
}
/// Retrieve the declaration for a declaration non-type
@@ -315,7 +336,7 @@ class TemplateArgument {
/// Retrieve the type for null non-type template argument.
QualType getNullPtrType() const {
assert(getKind() == NullPtr && "Unexpected kind");
- return QualType::getFromOpaquePtr(reinterpret_cast<void*>(TypeOrValue.V));
+ return QualType::getFromOpaquePtr(reinterpret_cast<void *>(TypeOrValue.V));
}
/// Retrieve the template name for a template name argument.
@@ -371,6 +392,14 @@ class TemplateArgument {
/// default template parameter.
bool getIsDefaulted() const { return (bool)TypeOrValue.IsDefaulted; }
+ /// Get the value of a StructuralValue.
+ const APValue &getAsStructuralValue() const { return *Value.Value; }
+
+ /// Get the type of a StructuralValue.
+ QualType getStructuralValueType() const {
+ return QualType::getFromOpaquePtr(Value.Type);
+ }
+
/// If this is a non-type template argument, get its type. Otherwise,
/// returns a null QualType.
QualType getNonTypeTemplateArgumentType() const;
@@ -516,6 +545,7 @@ class TemplateArgumentLoc {
assert(Argument.getKind() == TemplateArgument::NullPtr ||
Argument.getKind() == TemplateArgument::Integral ||
Argument.getKind() == TemplateArgument::Declaration ||
+ Argument.getKind() == TemplateArgument::StructuralValue ||
Argument.getKind() == TemplateArgument::Expression);
}
@@ -541,13 +571,9 @@ class TemplateArgumentLoc {
/// - Fetches the full source range of the argument.
SourceRange getSourceRange() const LLVM_READONLY;
- const TemplateArgument &getArgument() const {
- return Argument;
- }
+ const TemplateArgument &getArgument() const { return Argument; }
- TemplateArgumentLocInfo getLocInfo() const {
- return LocInfo;
- }
+ TemplateArgumentLocInfo getLocInfo() const { return LocInfo; }
TypeSourceInfo *getTypeSourceInfo() const {
if (Argument.getKind() != TemplateArgument::Type)
@@ -575,6 +601,11 @@ class TemplateArgumentLoc {
return LocInfo.getAsExpr();
}
+ Expr *getSourceStructuralValueExpression() const {
+ assert(Argument.getKind() == TemplateArgument::StructuralValue);
+ return LocInfo.getAsExpr();
+ }
+
NestedNameSpecifierLoc getTemplateQualifierLoc() const {
if (Argument.getKind() != TemplateArgument::Template &&
Argument.getKind() != TemplateArgument::TemplateExpansion)
@@ -606,8 +637,7 @@ class TemplateArgumentListInfo {
public:
TemplateArgumentListInfo() = default;
- TemplateArgumentListInfo(SourceLocation LAngleLoc,
- SourceLocation RAngleLoc)
+ TemplateArgumentListInfo(SourceLocation LAngleLoc, SourceLocation RAngleLoc)
: LAngleLoc(LAngleLoc), RAngleLoc(RAngleLoc) {}
// This can leak if used in an AST node, use ASTTemplateArgumentListInfo
@@ -626,21 +656,15 @@ class TemplateArgumentListInfo {
return Arguments.data();
}
- llvm::ArrayRef<TemplateArgumentLoc> arguments() const {
- return Arguments;
- }
+ llvm::ArrayRef<TemplateArgumentLoc> arguments() const { return Arguments; }
const TemplateArgumentLoc &operator[](unsigned I) const {
return Arguments[I];
}
- TemplateArgumentLoc &operator[](unsigned I) {
- return Arguments[I];
- }
+ TemplateArgumentLoc &operator[](unsigned I) { return Arguments[I]; }
- void addArgument(const TemplateArgumentLoc &Loc) {
- Arguments.push_back(Loc);
- }
+ void addArgument(const TemplateArgumentLoc &Loc) { Arguments.push_back(Loc); }
};
/// Represents an explicit template argument list in C++, e.g.,
diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
index dd24767b62f3ca..501968cb7d5f99 100644
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -5154,8 +5154,6 @@ def err_non_type_template_arg_subobject : Error<
"non-type template argument refers to subobject '%0'">;
def err_non_type_template_arg_addr_label_
diff : Error<
"template argument / label address
diff erence / what did you expect?">;
-def err_non_type_template_arg_unsupported : Error<
- "non-type template argument of type %0 is not yet supported">;
def err_template_arg_not_convertible : Error<
"non-type template argument of type %0 cannot be converted to a value "
"of type %1">;
@@ -5207,9 +5205,6 @@ def err_template_arg_not_object_or_func : Error<
"non-type template argument does not refer to an object or function">;
def err_template_arg_not_pointer_to_member_form : Error<
"non-type template argument is not a pointer to member constant">;
-def err_template_arg_member_ptr_base_derived_not_supported : Error<
- "non-type template argument of pointer-to-member type %1 that refers "
- "to member %q0 of a
diff erent class is not supported yet">;
def err_template_arg_invalid : Error<
"non-type template argument '%0' is invalid">;
def ext_template_arg_extra_parens : ExtWarn<
diff --git a/clang/include/clang/Sema/Sema.h b/clang/include/clang/Sema/Sema.h
index 0db39333b0ee34..d0f62afdf7bb16 100644
--- a/clang/include/clang/Sema/Sema.h
+++ b/clang/include/clang/Sema/Sema.h
@@ -8595,8 +8595,8 @@ class Sema final {
QualType ParamType,
SourceLocation Loc);
ExprResult
- BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg,
- SourceLocation Loc);
+ BuildExpressionFromNonTypeTemplateArgument(const TemplateArgument &Arg,
+ SourceLocation Loc);
/// Enumeration describing how template parameter lists are compared
/// for equality.
diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 0fc0831b221aab..5eb7aa3664569d 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -6754,6 +6754,11 @@ ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const {
case TemplateArgument::Integral:
return TemplateArgument(Arg, getCanonicalType(Arg.getIntegralType()));
+ case TemplateArgument::StructuralValue:
+ return TemplateArgument(*this,
+ getCanonicalType(Arg.getStructuralValueType()),
+ Arg.getAsStructuralValue());
+
case TemplateArgument::Type:
return TemplateArgument(getCanonicalType(Arg.getAsType()),
/*isNullPtr*/ false, Arg.getIsDefaulted());
diff --git a/clang/lib/AST/ASTImporter.cpp b/clang/lib/AST/ASTImporter.cpp
index b364796073022b..12734d62ed9fb7 100644
--- a/clang/lib/AST/ASTImporter.cpp
+++ b/clang/lib/AST/ASTImporter.cpp
@@ -823,6 +823,17 @@ ASTNodeImporter::import(const TemplateArgument &From) {
From.getIsDefaulted());
}
+ case TemplateArgument::StructuralValue: {
+ ExpectedType ToTypeOrErr = import(From.getStructuralValueType());
+ if (!ToTypeOrErr)
+ return ToTypeOrErr.takeError();
+ Expected<APValue> ToValueOrErr = import(From.getAsStructuralValue());
+ if (!ToValueOrErr)
+ return ToValueOrErr.takeError();
+ return TemplateArgument(Importer.getToContext(), *ToTypeOrErr,
+ *ToValueOrErr);
+ }
+
case TemplateArgument::Template: {
Expected<TemplateName> ToTemplateOrErr = import(From.getAsTemplate());
if (!ToTemplateOrErr)
@@ -3572,6 +3583,8 @@ class IsTypeDeclaredInsideVisitor
case TemplateArgument::NullPtr:
// FIXME: The type is not allowed to be in the function?
return CheckType(Arg.getNullPtrType());
+ case TemplateArgument::StructuralValue:
+ return CheckType(Arg.getStructuralValueType());
case TemplateArgument::Pack:
for (const auto &PackArg : Arg.getPackAsArray())
if (checkTemplateArgument(PackArg))
diff --git a/clang/lib/AST/ASTStructuralEquivalence.cpp b/clang/lib/AST/ASTStructuralEquivalence.cpp
index 5103fc86a80051..be7a850a2982c7 100644
--- a/clang/lib/AST/ASTStructuralEquivalence.cpp
+++ b/clang/lib/AST/ASTStructuralEquivalence.cpp
@@ -685,6 +685,9 @@ static bool IsStructurallyEquivalent(StructuralEquivalenceContext &Context,
return IsStructurallyEquivalent(Context, Arg1.getAsExpr(),
Arg2.getAsExpr());
+ case TemplateArgument::StructuralValue:
+ return Arg1.structurallyEquals(Arg2);
+
case TemplateArgument::Pack:
return IsStructurallyEquivalent(Context, Arg1.pack_elements(),
Arg2.pack_elements());
diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
index 2c3a0afee8cefc..26fdfa040796ed 100644
--- a/clang/lib/AST/Decl.cpp
+++ b/clang/lib/AST/Decl.cpp
@@ -343,6 +343,10 @@ LinkageComputer::getLVForTemplateArgumentList(ArrayRef<TemplateArgument> Args,
LV.merge(getTypeLinkageAndVisibility(Arg.getNullPtrType()));
continue;
+ case TemplateArgument::StructuralValue:
+ LV.merge(getLVForValue(Arg.getAsStructuralValue(), computation));
+ continue;
+
case TemplateArgument::Template:
case TemplateArgument::TemplateExpansion:
if (TemplateDecl *Template =
diff --git a/clang/lib/AST/ItaniumMangle.cpp b/clang/lib/AST/ItaniumMangle.cpp
index b1678479888eb7..56e8ee923e1eea 100644
--- a/clang/lib/AST/ItaniumMangle.cpp
+++ b/clang/lib/AST/ItaniumMangle.cpp
@@ -4833,9 +4833,23 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity,
E = cast<CXXStdInitializerListExpr>(E)->getSubExpr();
goto recurse;
- case Expr::SubstNonTypeTemplateParmExprClass:
+ case Expr::SubstNonTypeTemplateParmExprClass: {
+ // Mangle a substituted parameter the same way we mangle the template
+ // argument.
+ auto *SNTTPE = cast<SubstNonTypeTemplateParmExpr>(E);
+ if (auto *CE = dyn_cast<ConstantExpr>(SNTTPE->getReplacement())) {
+ // Pull out the constant value and mangle it as a template argument.
+ QualType ParamType = SNTTPE->getParameterType(Context.getASTContext());
+ assert(CE->hasAPValueResult() && "expected the NTTP to have an APValue");
+ mangleValueInTemplateArg(ParamType, CE->getAPValueResult(), false,
+ /*NeedExactType=*/true);
+ break;
+ }
+ // The remaining cases all happen to be substituted with expressions that
+ // mangle the same as a corresponding template argument anyway.
E = cast<SubstNonTypeTemplateParmExpr>(E)->getReplacement();
goto recurse;
+ }
case Expr::UserDefinedLiteralClass:
// We follow g++'s approach of mangling a UDL as a call to the literal
@@ -6064,6 +6078,11 @@ void CXXNameMangler::mangleTemplateArg(TemplateArgument A, bool NeedExactType) {
mangleNullPointer(A.getNullPtrType());
break;
}
+ case TemplateArgument::StructuralValue:
+ mangleValueInTemplateArg(A.getStructuralValueType(),
+ A.getAsStructuralValue(),
+ /*TopLevel=*/true, NeedExactType);
+ break;
case TemplateArgument::Pack: {
// <template-arg> ::= J <template-arg>* E
Out << 'J';
@@ -6472,7 +6491,20 @@ void CXXNameMangler::mangleValueInTemplateArg(QualType T, const APValue &V,
Out << "plcvPcad";
Kind = Offset;
} else {
- if (!V.getLValuePath().empty() || V.isLValueOnePastTheEnd()) {
+ // Clang 11 and before mangled an array subject to array-to-pointer decay
+ // as if it were the declaration itself.
+ bool IsArrayToPointerDecayMangledAsDecl = false;
+ if (TopLevel && Ctx.getLangOpts().getClangABICompat() <=
+ LangOptions::ClangABI::Ver11) {
+ QualType BType = B.getType();
+ IsArrayToPointerDecayMangledAsDecl =
+ BType->isArrayType() && V.getLValuePath().size() == 1 &&
+ V.getLValuePath()[0].getAsArrayIndex() == 0 &&
+ Ctx.hasSimilarType(T, Ctx.getDecayedType(BType));
+ }
+
+ if ((!V.getLValuePath().empty() || V.isLValueOnePastTheEnd()) &&
+ !IsArrayToPointerDecayMangledAsDecl) {
NotPrimaryExpr();
// A final conversion to the template parameter's type is usually
// folded into the 'so' mangling, but we can't do that for 'void*'
diff --git a/clang/lib/AST/MicrosoftMangle.cpp b/clang/lib/AST/MicrosoftMangle.cpp
index 8346ad87b409b6..36b5bf64f675a8 100644
--- a/clang/lib/AST/MicrosoftMangle.cpp
+++ b/clang/lib/AST/MicrosoftMangle.cpp
@@ -337,6 +337,7 @@ class MicrosoftCXXNameMangler {
public:
enum QualifierMangleMode { QMM_Drop, QMM_Mangle, QMM_Escape, QMM_Result };
+ enum class TplArgKind { ClassNTTP, StructuralValue };
MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_)
: Context(C), Out(Out_), Structor(nullptr), StructorType(-1),
@@ -453,7 +454,7 @@ class MicrosoftCXXNameMangler {
const TemplateArgumentList &TemplateArgs);
void mangleTemplateArg(const TemplateDecl *TD, const TemplateArgument &TA,
const NamedDecl *Parm);
- void mangleTemplateArgValue(QualType T, const APValue &V,
+ void mangleTemplateArgValue(QualType T, const APValue &V, TplArgKind,
bool WithScalarType = false);
void mangleObjCProtocol(const ObjCProtocolDecl *PD);
@@ -1088,7 +1089,7 @@ void MicrosoftCXXNameMangler::mangleUnqualifiedName(GlobalDecl GD,
if (const auto *TPO = dyn_cast<TemplateParamObjectDecl>(ND)) {
Out << "?__N";
mangleTemplateArgValue(TPO->getType().getUnqualifiedType(),
- TPO->getValue());
+ TPO->getValue(), TplArgKind::ClassNTTP);
break;
}
@@ -1604,6 +1605,22 @@ void MicrosoftCXXNameMangler::mangleTemplateArgs(
}
}
+/// If value V (with type T) represents a decayed pointer to the first element
+/// of an array, return that array.
+static ValueDecl *getAsArrayToPointerDecayedDecl(QualType T, const APValue &V) {
+ // Must be a pointer...
+ if (!T->isPointerType() || !V.isLValue() || !V.hasLValuePath() ||
+ !V.getLValueBase())
+ return nullptr;
+ // ... to element 0 of an array.
+ QualType BaseT = V.getLValueBase().getType();
+ if (!BaseT->isArrayType() || V.getLValuePath().size() != 1 ||
+ V.getLValuePath()[0].getAsArrayIndex() != 0)
+ return nullptr;
+ return const_cast<ValueDecl *>(
+ V.getLValueBase().dyn_cast<const ValueDecl *>());
+}
+
void MicrosoftCXXNameMangler::mangleTemplateArg(const TemplateDecl *TD,
const TemplateArgument &TA,
const NamedDecl *Parm) {
@@ -1669,7 +1686,7 @@ void MicrosoftCXXNameMangler::mangleTemplateArg(const TemplateDecl *TD,
Out << "$";
auto *TPO = cast<TemplateParamObjectDecl>(ND);
mangleTemplateArgValue(TPO->getType().getUnqualifiedType(),
- TPO->getValue());
+ TPO->getValue(), TplArgKind::ClassNTTP);
} else {
mangle(ND, "$1?");
}
@@ -1712,6 +1729,27 @@ void MicrosoftCXXNameMangler::mangleTemplateArg(const TemplateDecl *TD,
cast<NonTypeTemplateParmDecl>(Parm), T);
break;
}
+ case TemplateArgument::StructuralValue:
+ if (ValueDecl *D = getAsArrayToPointerDecayedDecl(
+ TA.getStructuralValueType(), TA.getAsStructuralValue())) {
+ // Mangle the result of array-to-pointer decay as if it were a reference
+ // to the original declaration, to match MSVC's behavior. This can result
+ // in mangling collisions in some cases!
+ return mangleTemplateArg(
+ TD, TemplateArgument(D, TA.getStructuralValueType()), Parm);
+ }
+ Out << "$";
+ if (cast<NonTypeTemplateParmDecl>(Parm)
+ ->getType()
+ ->getContainedDeducedType()) {
+ Out << "M";
+ mangleType(TA.getNonTypeTemplateArgumentType(), SourceRange(), QMM_Drop);
+ }
+ mangleTemplateArgValue(TA.getStructuralValueType(),
+ TA.getAsStructuralValue(),
+ TplArgKind::StructuralValue,
+ /*WithScalarType=*/false);
+ break;
case TemplateArgument::Expression:
mangleExpression(TA.getAsExpr(), cast<NonTypeTemplateParmDecl>(Parm));
break;
@@ -1754,6 +1792,7 @@ void MicrosoftCXXNameMangler::mangleTemplateArg(const TemplateDecl *TD,
void MicrosoftCXXNameMangler::mangleTemplateArgValue(QualType T,
const APValue &V,
+ TplArgKind TAK,
bool WithScalarType) {
switch (V.getKind()) {
case APValue::None:
@@ -1806,7 +1845,7 @@ void MicrosoftCXXNameMangler::mangleTemplateArgValue(QualType T,
break;
}
} else {
- if (T->isPointerType())
+ if (TAK == TplArgKind::ClassNTTP && T->isPointerType())
Out << "5";
SmallVector<char, 2> EntryTypes;
@@ -1850,12 +1889,12 @@ void MicrosoftCXXNameMangler::mangleTemplateArgValue(QualType T,
auto *VD = Base.dyn_cast<const ValueDecl*>();
if (!VD)
break;
- Out << "E";
+ Out << (TAK == TplArgKind::ClassNTTP ? 'E' : '1');
mangle(VD);
for (const std::function<void()> &Mangler : EntryManglers)
Mangler();
- if (T->isPointerType())
+ if (TAK == TplArgKind::ClassNTTP && T->isPointerType())
Out << '@';
}
@@ -1869,11 +1908,18 @@ void MicrosoftCXXNameMangler::mangleTemplateArgValue(QualType T,
const CXXRecordDecl *RD =
T->castAs<MemberPointerType>()->getMostRecentCXXRecordDecl();
const ValueDecl *D = V.getMemberPointerDecl();
- if (T->isMemberDataPointerType())
- mangleMemberDataPointerInClassNTTP(RD, D);
- else
- mangleMemberFunctionPointerInClassNTTP(RD,
- cast_or_null<CXXMethodDecl>(D));
+ if (TAK == TplArgKind::ClassNTTP) {
+ if (T->isMemberDataPointerType())
+ mangleMemberDataPointerInClassNTTP(RD, D);
+ else
+ mangleMemberFunctionPointerInClassNTTP(RD,
+ cast_or_null<CXXMethodDecl>(D));
+ } else {
+ if (T->isMemberDataPointerType())
+ mangleMemberDataPointer(RD, D, "");
+ else
+ mangleMemberFunctionPointer(RD, cast_or_null<CXXMethodDecl>(D), "");
+ }
return;
}
@@ -1885,11 +1931,11 @@ void MicrosoftCXXNameMangler::mangleTemplateArgValue(QualType T,
unsigned BaseIndex = 0;
for (const CXXBaseSpecifier &B : RD->bases())
- mangleTemplateArgValue(B.getType(), V.getStructBase(BaseIndex++));
+ mangleTemplateArgValue(B.getType(), V.getStructBase(BaseIndex++), TAK);
for (const FieldDecl *FD : RD->fields())
if (!FD->isUnnamedBitfield())
mangleTemplateArgValue(FD->getType(),
- V.getStructField(FD->getFieldIndex()),
+ V.getStructField(FD->getFieldIndex()), TAK,
/*WithScalarType*/ true);
Out << '@';
return;
@@ -1900,7 +1946,7 @@ void MicrosoftCXXNameMangler::mangleTemplateArgValue(QualType T,
mangleType(T, SourceRange(), QMM_Escape);
if (const FieldDecl *FD = V.getUnionField()) {
mangleUnqualifiedName(FD);
- mangleTemplateArgValue(FD->getType(), V.getUnionValue());
+ mangleTemplateArgValue(FD->getType(), V.getUnionValue(), TAK);
}
Out << '@';
return;
@@ -1932,7 +1978,7 @@ void MicrosoftCXXNameMangler::mangleTemplateArgValue(QualType T,
const APValue &ElemV = I < V.getArrayInitializedElts()
? V.getArrayInitializedElt(I)
: V.getArrayFiller();
- mangleTemplateArgValue(ElemT, ElemV);
+ mangleTemplateArgValue(ElemT, ElemV, TAK);
Out << '@';
}
Out << '@';
@@ -1949,7 +1995,7 @@ void MicrosoftCXXNameMangler::mangleTemplateArgValue(QualType T,
mangleType(ElemT, SourceRange(), QMM_Escape);
for (unsigned I = 0, N = V.getVectorLength(); I != N; ++I) {
const APValue &ElemV = V.getVectorElt(I);
- mangleTemplateArgValue(ElemT, ElemV);
+ mangleTemplateArgValue(ElemT, ElemV, TAK);
Out << '@';
}
Out << "@@";
diff --git a/clang/lib/AST/ODRHash.cpp b/clang/lib/AST/ODRHash.cpp
index c5aa91a81da053..5b98646a1e8dc0 100644
--- a/clang/lib/AST/ODRHash.cpp
+++ b/clang/lib/AST/ODRHash.cpp
@@ -180,6 +180,10 @@ void ODRHash::AddTemplateArgument(TemplateArgument TA) {
TA.getAsIntegral().Profile(ID);
break;
}
+ case TemplateArgument::StructuralValue:
+ AddQualType(TA.getStructuralValueType());
+ AddStructuralValue(TA.getAsStructuralValue());
+ break;
case TemplateArgument::Template:
case TemplateArgument::TemplateExpansion:
AddTemplateName(TA.getAsTemplateOrTemplatePattern());
@@ -1296,3 +1300,66 @@ void ODRHash::AddQualType(QualType T) {
void ODRHash::AddBoolean(bool Value) {
Bools.push_back(Value);
}
+
+void ODRHash::AddStructuralValue(const APValue &Value) {
+ ID.AddInteger(Value.getKind());
+
+ // 'APValue::Profile' uses pointer values to make hash for LValue and
+ // MemberPointer, but they
diff er from one compiler invocation to another.
+ // So, handle them explicitly here.
+
+ switch (Value.getKind()) {
+ case APValue::LValue: {
+ const APValue::LValueBase &Base = Value.getLValueBase();
+ if (!Base) {
+ ID.AddInteger(Value.getLValueOffset().getQuantity());
+ break;
+ }
+
+ assert(Base.is<const ValueDecl *>());
+ AddDecl(Base.get<const ValueDecl *>());
+ ID.AddInteger(Value.getLValueOffset().getQuantity());
+
+ bool OnePastTheEnd = Value.isLValueOnePastTheEnd();
+ if (Value.hasLValuePath()) {
+ QualType TypeSoFar = Base.getType();
+ for (APValue::LValuePathEntry E : Value.getLValuePath()) {
+ if (const auto *AT = TypeSoFar->getAsArrayTypeUnsafe()) {
+ if (const auto *CAT = dyn_cast<ConstantArrayType>(AT))
+ OnePastTheEnd |= CAT->getSize() == E.getAsArrayIndex();
+ TypeSoFar = AT->getElementType();
+ } else {
+ const Decl *D = E.getAsBaseOrMember().getPointer();
+ if (const auto *FD = dyn_cast<FieldDecl>(D)) {
+ if (FD->getParent()->isUnion())
+ ID.AddInteger(FD->getFieldIndex());
+ TypeSoFar = FD->getType();
+ } else {
+ TypeSoFar =
+ D->getASTContext().getRecordType(cast<CXXRecordDecl>(D));
+ }
+ }
+ }
+ }
+ unsigned Val = 0;
+ if (Value.isNullPointer())
+ Val |= 1 << 0;
+ if (OnePastTheEnd)
+ Val |= 1 << 1;
+ if (Value.hasLValuePath())
+ Val |= 1 << 2;
+ ID.AddInteger(Val);
+ break;
+ }
+ case APValue::MemberPointer: {
+ const ValueDecl *D = Value.getMemberPointerDecl();
+ assert(D);
+ AddDecl(D);
+ ID.AddInteger(
+ D->getASTContext().getMemberPointerPathAdjustment(Value).getQuantity());
+ break;
+ }
+ default:
+ Value.Profile(ID);
+ }
+}
diff --git a/clang/lib/AST/StmtProfile.cpp b/clang/lib/AST/StmtProfile.cpp
index d7b980a585702a..dd0838edab7b3f 100644
--- a/clang/lib/AST/StmtProfile.cpp
+++ b/clang/lib/AST/StmtProfile.cpp
@@ -2416,6 +2416,12 @@ void StmtProfiler::VisitTemplateArgument(const TemplateArgument &Arg) {
Arg.getAsIntegral().Profile(ID);
break;
+ case TemplateArgument::StructuralValue:
+ VisitType(Arg.getStructuralValueType());
+ // FIXME: Do we need to recursively decompose this ourselves?
+ Arg.getAsStructuralValue().Profile(ID);
+ break;
+
case TemplateArgument::Expression:
Visit(Arg.getAsExpr());
break;
diff --git a/clang/lib/AST/TemplateBase.cpp b/clang/lib/AST/TemplateBase.cpp
index 2ec0b2cce08ca4..2bdbeb08ef2046 100644
--- a/clang/lib/AST/TemplateBase.cpp
+++ b/clang/lib/AST/TemplateBase.cpp
@@ -161,8 +161,25 @@ static bool needsAmpersandOnTemplateArg(QualType paramType, QualType argType) {
// TemplateArgument Implementation
//===----------------------------------------------------------------------===//
-TemplateArgument::TemplateArgument(ASTContext &Ctx, const llvm::APSInt &Value,
- QualType Type, bool IsDefaulted) {
+void TemplateArgument::initFromType(QualType T, bool IsNullPtr,
+ bool IsDefaulted) {
+ TypeOrValue.Kind = IsNullPtr ? NullPtr : Type;
+ TypeOrValue.IsDefaulted = IsDefaulted;
+ TypeOrValue.V = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr());
+}
+
+void TemplateArgument::initFromDeclaration(ValueDecl *D, QualType QT,
+ bool IsDefaulted) {
+ assert(D && "Expected decl");
+ DeclArg.Kind = Declaration;
+ DeclArg.IsDefaulted = IsDefaulted;
+ DeclArg.QT = QT.getAsOpaquePtr();
+ DeclArg.D = D;
+}
+
+void TemplateArgument::initFromIntegral(const ASTContext &Ctx,
+ const llvm::APSInt &Value,
+ QualType Type, bool IsDefaulted) {
Integer.Kind = Integral;
Integer.IsDefaulted = IsDefaulted;
// Copy the APSInt value into our decomposed form.
@@ -181,6 +198,56 @@ TemplateArgument::TemplateArgument(ASTContext &Ctx, const llvm::APSInt &Value,
Integer.Type = Type.getAsOpaquePtr();
}
+void TemplateArgument::initFromStructural(const ASTContext &Ctx, QualType Type,
+ const APValue &V, bool IsDefaulted) {
+ Value.Kind = StructuralValue;
+ Value.IsDefaulted = IsDefaulted;
+ Value.Value = new (Ctx) APValue(V);
+ Ctx.addDestruction(Value.Value);
+ Value.Type = Type.getAsOpaquePtr();
+}
+
+TemplateArgument::TemplateArgument(const ASTContext &Ctx,
+ const llvm::APSInt &Value, QualType Type,
+ bool IsDefaulted) {
+ initFromIntegral(Ctx, Value, Type, IsDefaulted);
+}
+
+static const ValueDecl *getAsSimpleValueDeclRef(const ASTContext &Ctx,
+ QualType T, const APValue &V) {
+ // Pointers to members are relatively easy.
+ if (V.isMemberPointer() && V.getMemberPointerPath().empty())
+ return V.getMemberPointerDecl();
+
+ // We model class non-type template parameters as their template parameter
+ // object declaration.
+ if (V.isStruct() || V.isUnion())
+ return Ctx.getTemplateParamObjectDecl(T, V);
+
+ // Pointers and references with an empty path use the special 'Declaration'
+ // representation.
+ if (V.isLValue() && V.hasLValuePath() && V.getLValuePath().empty() &&
+ !V.isLValueOnePastTheEnd())
+ return V.getLValueBase().dyn_cast<const ValueDecl *>();
+
+ // Everything else uses the 'structural' representation.
+ return nullptr;
+}
+
+TemplateArgument::TemplateArgument(const ASTContext &Ctx, QualType Type,
+ const APValue &V, bool IsDefaulted) {
+ if (Type->isIntegralOrEnumerationType() && V.isInt())
+ initFromIntegral(Ctx, V.getInt(), Type, IsDefaulted);
+ else if ((V.isLValue() && V.isNullPointer()) ||
+ (V.isMemberPointer() && !V.getMemberPointerDecl()))
+ initFromType(Type, /*isNullPtr=*/true, IsDefaulted);
+ else if (const ValueDecl *VD = getAsSimpleValueDeclRef(Ctx, Type, V))
+ // FIXME: The Declaration form should expose a const ValueDecl*.
+ initFromDeclaration(const_cast<ValueDecl *>(VD), Type, IsDefaulted);
+ else
+ initFromStructural(Ctx, Type, V, IsDefaulted);
+}
+
TemplateArgument
TemplateArgument::CreatePackCopy(ASTContext &Context,
ArrayRef<TemplateArgument> Args) {
@@ -221,6 +288,7 @@ TemplateArgumentDependence TemplateArgument::getDependence() const {
case NullPtr:
case Integral:
+ case StructuralValue:
return TemplateArgumentDependence::None;
case Expression:
@@ -251,6 +319,7 @@ bool TemplateArgument::isPackExpansion() const {
case Null:
case Declaration:
case Integral:
+ case StructuralValue:
case Pack:
case Template:
case NullPtr:
@@ -301,6 +370,9 @@ QualType TemplateArgument::getNonTypeTemplateArgumentType() const {
case TemplateArgument::NullPtr:
return getNullPtrType();
+
+ case TemplateArgument::StructuralValue:
+ return getStructuralValueType();
}
llvm_unreachable("Invalid TemplateArgument Kind!");
@@ -334,8 +406,13 @@ void TemplateArgument::Profile(llvm::FoldingSetNodeID &ID,
break;
case Integral:
- getAsIntegral().Profile(ID);
getIntegralType().Profile(ID);
+ getAsIntegral().Profile(ID);
+ break;
+
+ case StructuralValue:
+ getStructuralValueType().Profile(ID);
+ getAsStructuralValue().Profile(ID);
break;
case Expression:
@@ -372,6 +449,16 @@ bool TemplateArgument::structurallyEquals(const TemplateArgument &Other) const {
return getIntegralType() == Other.getIntegralType() &&
getAsIntegral() == Other.getAsIntegral();
+ case StructuralValue: {
+ if (getStructuralValueType() != Other.getStructuralValueType())
+ return false;
+
+ llvm::FoldingSetNodeID A, B;
+ getAsStructuralValue().Profile(A);
+ Other.getAsStructuralValue().Profile(B);
+ return A == B;
+ }
+
case Pack:
if (Args.NumArgs != Other.Args.NumArgs) return false;
for (unsigned I = 0, E = Args.NumArgs; I != E; ++I)
@@ -398,6 +485,7 @@ TemplateArgument TemplateArgument::getPackExpansionPattern() const {
case Declaration:
case Integral:
+ case StructuralValue:
case Pack:
case Null:
case Template:
@@ -440,6 +528,10 @@ void TemplateArgument::print(const PrintingPolicy &Policy, raw_ostream &Out,
break;
}
+ case StructuralValue:
+ getAsStructuralValue().printPretty(Out, Policy, getStructuralValueType());
+ break;
+
case NullPtr:
// FIXME: Include the type if it's not obvious from the context.
Out << "nullptr";
@@ -523,6 +615,9 @@ SourceRange TemplateArgumentLoc::getSourceRange() const {
case TemplateArgument::Integral:
return getSourceIntegralExpression()->getSourceRange();
+ case TemplateArgument::StructuralValue:
+ return getSourceStructuralValueExpression()->getSourceRange();
+
case TemplateArgument::Pack:
case TemplateArgument::Null:
return SourceRange();
@@ -551,6 +646,18 @@ static const T &DiagTemplateArg(const T &DB, const TemplateArgument &Arg) {
case TemplateArgument::Integral:
return DB << toString(Arg.getAsIntegral(), 10);
+ case TemplateArgument::StructuralValue: {
+ // FIXME: We're guessing at LangOptions!
+ SmallString<32> Str;
+ llvm::raw_svector_ostream OS(Str);
+ LangOptions LangOpts;
+ LangOpts.CPlusPlus = true;
+ PrintingPolicy Policy(LangOpts);
+ Arg.getAsStructuralValue().printPretty(OS, Policy,
+ Arg.getStructuralValueType());
+ return DB << OS.str();
+ }
+
case TemplateArgument::Template:
return DB << Arg.getAsTemplate();
diff --git a/clang/lib/AST/TypeLoc.cpp b/clang/lib/AST/TypeLoc.cpp
index e12b9b50f6e722..66732bba18e2d6 100644
--- a/clang/lib/AST/TypeLoc.cpp
+++ b/clang/lib/AST/TypeLoc.cpp
@@ -586,6 +586,7 @@ void TemplateSpecializationTypeLoc::initializeArgLocs(
case TemplateArgument::Integral:
case TemplateArgument::Declaration:
case TemplateArgument::NullPtr:
+ case TemplateArgument::StructuralValue:
ArgInfos[i] = TemplateArgumentLocInfo();
break;
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index c5b96f93b42c38..0f3f684d61dc94 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -2201,6 +2201,14 @@ CGDebugInfo::CollectTemplateParams(std::optional<TemplateArgs> OArgs,
TemplateParams.push_back(DBuilder.createTemplateValueParameter(
TheCU, Name, TTy, defaultParameter, V));
} break;
+ case TemplateArgument::StructuralValue: {
+ QualType T = TA.getStructuralValueType();
+ llvm::DIType *TTy = getOrCreateType(T, Unit);
+ llvm::Constant *V = ConstantEmitter(CGM).emitAbstract(
+ SourceLocation(), TA.getAsStructuralValue(), T);
+ TemplateParams.push_back(DBuilder.createTemplateValueParameter(
+ TheCU, Name, TTy, defaultParameter, V));
+ } break;
case TemplateArgument::Template: {
std::string QualName;
llvm::raw_string_ostream OS(QualName);
@@ -5401,6 +5409,8 @@ std::string CGDebugInfo::GetName(const Decl *D, bool Qualified) const {
// feasible some day.
return TA.getAsIntegral().getBitWidth() <= 64 &&
IsReconstitutableType(TA.getIntegralType());
+ case TemplateArgument::StructuralValue:
+ return false;
case TemplateArgument::Type:
return IsReconstitutableType(TA.getAsType());
default:
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index d12e85b48d0b00..c5f6b6d3a99f0b 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -1516,6 +1516,14 @@ LValue CodeGenFunction::EmitLValue(const Expr *E,
return LV;
}
+static QualType getConstantExprReferredType(const FullExpr *E,
+ const ASTContext &Ctx) {
+ const Expr *SE = E->getSubExpr()->IgnoreImplicit();
+ if (isa<OpaqueValueExpr>(SE))
+ return SE->getType();
+ return cast<CallExpr>(SE)->getCallReturnType(Ctx)->getPointeeType();
+}
+
LValue CodeGenFunction::EmitLValueHelper(const Expr *E,
KnownNonNull_t IsKnownNonNull) {
ApplyDebugLocation DL(*this, E);
@@ -1554,9 +1562,7 @@ LValue CodeGenFunction::EmitLValueHelper(const Expr *E,
case Expr::ConstantExprClass: {
const ConstantExpr *CE = cast<ConstantExpr>(E);
if (llvm::Value *Result = ConstantEmitter(*this).tryEmitConstantExpr(CE)) {
- QualType RetType = cast<CallExpr>(CE->getSubExpr()->IgnoreImplicit())
- ->getCallReturnType(getContext())
- ->getPointeeType();
+ QualType RetType = getConstantExprReferredType(CE, getContext());
return MakeNaturalAlignAddrLValue(Result, RetType);
}
return EmitLValue(cast<ConstantExpr>(E)->getSubExpr(), IsKnownNonNull);
diff --git a/clang/lib/Index/USRGeneration.cpp b/clang/lib/Index/USRGeneration.cpp
index fb936d9fbf8ab4..5acc86191f8f9c 100644
--- a/clang/lib/Index/USRGeneration.cpp
+++ b/clang/lib/Index/USRGeneration.cpp
@@ -12,6 +12,7 @@
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/DeclVisitor.h"
+#include "clang/AST/ODRHash.h"
#include "clang/Basic/FileManager.h"
#include "clang/Lex/PreprocessingRecord.h"
#include "llvm/Support/Path.h"
@@ -1051,6 +1052,15 @@ void USRGenerator::VisitTemplateArgument(const TemplateArgument &Arg) {
VisitType(Arg.getIntegralType());
Out << Arg.getAsIntegral();
break;
+
+ case TemplateArgument::StructuralValue: {
+ Out << 'S';
+ VisitType(Arg.getStructuralValueType());
+ ODRHash Hash{};
+ Hash.AddStructuralValue(Arg.getAsStructuralValue());
+ Out << Hash.CalculateHash();
+ break;
+ }
}
}
diff --git a/clang/lib/Sema/SemaLookup.cpp b/clang/lib/Sema/SemaLookup.cpp
index 996f8b57233ba2..02b1a045df44c2 100644
--- a/clang/lib/Sema/SemaLookup.cpp
+++ b/clang/lib/Sema/SemaLookup.cpp
@@ -2982,6 +2982,7 @@ addAssociatedClassesAndNamespaces(AssociatedLookup &Result,
case TemplateArgument::Integral:
case TemplateArgument::Expression:
case TemplateArgument::NullPtr:
+ case TemplateArgument::StructuralValue:
// [Note: non-type template arguments do not contribute to the set of
// associated namespaces. ]
break;
diff --git a/clang/lib/Sema/SemaOverload.cpp b/clang/lib/Sema/SemaOverload.cpp
index 6ee5f26d55c3a5..697a1c0cfc404e 100644
--- a/clang/lib/Sema/SemaOverload.cpp
+++ b/clang/lib/Sema/SemaOverload.cpp
@@ -6217,7 +6217,15 @@ Sema::EvaluateConvertedConstantExpression(Expr *E, QualType T, APValue &Value,
if (Notes.empty()) {
// It's a constant expression.
- Expr *E = ConstantExpr::Create(Context, Result.get(), Value);
+ Expr *E = Result.get();
+ if (const auto *CE = dyn_cast<ConstantExpr>(E)) {
+ // We expect a ConstantExpr to have a value associated with it
+ // by this point.
+ assert(CE->getResultStorageKind() != ConstantResultStorageKind::None &&
+ "ConstantExpr has no value associated with it");
+ } else {
+ E = ConstantExpr::Create(Context, Result.get(), Value);
+ }
if (!PreNarrowingValue.isAbsent())
Value = std::move(PreNarrowingValue);
return E;
diff --git a/clang/lib/Sema/SemaTemplate.cpp b/clang/lib/Sema/SemaTemplate.cpp
index 839d508b911f06..9bfa71dc8bcf1d 100644
--- a/clang/lib/Sema/SemaTemplate.cpp
+++ b/clang/lib/Sema/SemaTemplate.cpp
@@ -4427,6 +4427,7 @@ static bool isTemplateArgumentTemplateParameter(
case TemplateArgument::NullPtr:
case TemplateArgument::Integral:
case TemplateArgument::Declaration:
+ case TemplateArgument::StructuralValue:
case TemplateArgument::Pack:
case TemplateArgument::TemplateExpansion:
return false;
@@ -5758,6 +5759,7 @@ bool Sema::CheckTemplateArgument(
case TemplateArgument::Declaration:
case TemplateArgument::Integral:
+ case TemplateArgument::StructuralValue:
case TemplateArgument::NullPtr:
// We've already checked this template argument, so just copy
// it to the list of converted arguments.
@@ -5912,11 +5914,10 @@ bool Sema::CheckTemplateArgument(
return true;
case TemplateArgument::Declaration:
- llvm_unreachable("Declaration argument with template template parameter");
case TemplateArgument::Integral:
- llvm_unreachable("Integral argument with template template parameter");
+ case TemplateArgument::StructuralValue:
case TemplateArgument::NullPtr:
- llvm_unreachable("Null pointer argument with template template parameter");
+ llvm_unreachable("non-type argument with template template parameter");
case TemplateArgument::Pack:
llvm_unreachable("Caller must expand template argument packs");
@@ -7411,44 +7412,9 @@ ExprResult Sema::CheckTemplateArgument(NonTypeTemplateParmDecl *Param,
if (ArgResult.isInvalid())
return ExprError();
- // Convert the APValue to a TemplateArgument.
- switch (Value.getKind()) {
- case APValue::None:
- assert(ParamType->isNullPtrType());
- SugaredConverted = TemplateArgument(ParamType, /*isNullPtr=*/true);
- CanonicalConverted = TemplateArgument(CanonParamType, /*isNullPtr=*/true);
- break;
- case APValue::Indeterminate:
- llvm_unreachable("result of constant evaluation should be initialized");
- break;
- case APValue::Int:
- assert(ParamType->isIntegralOrEnumerationType());
- SugaredConverted = TemplateArgument(Context, Value.getInt(), ParamType);
- CanonicalConverted =
- TemplateArgument(Context, Value.getInt(), CanonParamType);
- break;
- case APValue::MemberPointer: {
- assert(ParamType->isMemberPointerType());
-
- // FIXME: We need TemplateArgument representation and mangling for these.
- if (!Value.getMemberPointerPath().empty()) {
- Diag(Arg->getBeginLoc(),
- diag::err_template_arg_member_ptr_base_derived_not_supported)
- << Value.getMemberPointerDecl() << ParamType
- << Arg->getSourceRange();
- return ExprError();
- }
-
- auto *VD = const_cast<ValueDecl*>(Value.getMemberPointerDecl());
- SugaredConverted = VD ? TemplateArgument(VD, ParamType)
- : TemplateArgument(ParamType, /*isNullPtr=*/true);
- CanonicalConverted =
- VD ? TemplateArgument(cast<ValueDecl>(VD->getCanonicalDecl()),
- CanonParamType)
- : TemplateArgument(CanonParamType, /*isNullPtr=*/true);
- break;
- }
- case APValue::LValue: {
+ // Prior to C++20, enforce restrictions on possible template argument
+ // values.
+ if (!getLangOpts().CPlusPlus20 && Value.isLValue()) {
// For a non-type template-parameter of pointer or reference type,
// the value of the constant expression shall not refer to
assert(ParamType->isPointerType() || ParamType->isReferenceType() ||
@@ -7466,8 +7432,7 @@ ExprResult Sema::CheckTemplateArgument(NonTypeTemplateParmDecl *Param,
<< Arg->getSourceRange();
return ExprError();
}
- // -- a subobject
- // FIXME: Until C++20
+ // -- a subobject [until C++20]
if (Value.hasLValuePath() && Value.getLValuePath().size() == 1 &&
VD && VD->getType()->isArrayType() &&
Value.getLValuePath()[0].getAsArrayIndex() == 0 &&
@@ -7485,37 +7450,13 @@ ExprResult Sema::CheckTemplateArgument(NonTypeTemplateParmDecl *Param,
"null reference should not be a constant expression");
assert((!VD || !ParamType->isNullPtrType()) &&
"non-null value of type nullptr_t?");
-
- SugaredConverted = VD ? TemplateArgument(VD, ParamType)
- : TemplateArgument(ParamType, /*isNullPtr=*/true);
- CanonicalConverted =
- VD ? TemplateArgument(cast<ValueDecl>(VD->getCanonicalDecl()),
- CanonParamType)
- : TemplateArgument(CanonParamType, /*isNullPtr=*/true);
- break;
- }
- case APValue::Struct:
- case APValue::Union: {
- // Get or create the corresponding template parameter object.
- TemplateParamObjectDecl *D =
- Context.getTemplateParamObjectDecl(ParamType, Value);
- SugaredConverted = TemplateArgument(D, ParamType);
- CanonicalConverted =
- TemplateArgument(D->getCanonicalDecl(), CanonParamType);
- break;
}
- case APValue::AddrLabelDiff:
+
+ if (Value.isAddrLabelDiff())
return Diag(StartLoc, diag::err_non_type_template_arg_addr_label_
diff );
- case APValue::FixedPoint:
- case APValue::Float:
- case APValue::ComplexInt:
- case APValue::ComplexFloat:
- case APValue::Vector:
- case APValue::Array:
- return Diag(StartLoc, diag::err_non_type_template_arg_unsupported)
- << ParamType;
- }
+ SugaredConverted = TemplateArgument(Context, ParamType, Value);
+ CanonicalConverted = TemplateArgument(Context, CanonParamType, Value);
return ArgResult.get();
}
@@ -8099,12 +8040,9 @@ Sema::BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg,
/// This routine takes care of the mapping from an integral template
/// argument (which may have any integral type) to the appropriate
/// literal value.
-ExprResult
-Sema::BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg,
- SourceLocation Loc) {
- assert(Arg.getKind() == TemplateArgument::Integral &&
- "Operation is only valid for integral template arguments");
- QualType OrigT = Arg.getIntegralType();
+static Expr *BuildExpressionFromIntegralTemplateArgumentValue(
+ Sema &S, QualType OrigT, const llvm::APSInt &Int, SourceLocation Loc) {
+ assert(OrigT->isIntegralOrEnumerationType());
// If this is an enum type that we're instantiating, we need to use an integer
// type the same size as the enumerator. We don't want to build an
@@ -8120,7 +8058,7 @@ Sema::BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg,
CharacterLiteralKind Kind;
if (T->isWideCharType())
Kind = CharacterLiteralKind::Wide;
- else if (T->isChar8Type() && getLangOpts().Char8)
+ else if (T->isChar8Type() && S.getLangOpts().Char8)
Kind = CharacterLiteralKind::UTF8;
else if (T->isChar16Type())
Kind = CharacterLiteralKind::UTF16;
@@ -8129,29 +8067,133 @@ Sema::BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg,
else
Kind = CharacterLiteralKind::Ascii;
- E = new (Context) CharacterLiteral(Arg.getAsIntegral().getZExtValue(),
- Kind, T, Loc);
+ E = new (S.Context) CharacterLiteral(Int.getZExtValue(), Kind, T, Loc);
} else if (T->isBooleanType()) {
- E = CXXBoolLiteralExpr::Create(Context, Arg.getAsIntegral().getBoolValue(),
- T, Loc);
- } else if (T->isNullPtrType()) {
- E = new (Context) CXXNullPtrLiteralExpr(Context.NullPtrTy, Loc);
+ E = CXXBoolLiteralExpr::Create(S.Context, Int.getBoolValue(), T, Loc);
} else {
- E = IntegerLiteral::Create(Context, Arg.getAsIntegral(), T, Loc);
+ E = IntegerLiteral::Create(S.Context, Int, T, Loc);
}
if (OrigT->isEnumeralType()) {
// FIXME: This is a hack. We need a better way to handle substituted
// non-type template parameters.
- E = CStyleCastExpr::Create(Context, OrigT, VK_PRValue, CK_IntegralCast, E,
- nullptr, CurFPFeatureOverrides(),
- Context.getTrivialTypeSourceInfo(OrigT, Loc),
+ E = CStyleCastExpr::Create(S.Context, OrigT, VK_PRValue, CK_IntegralCast, E,
+ nullptr, S.CurFPFeatureOverrides(),
+ S.Context.getTrivialTypeSourceInfo(OrigT, Loc),
Loc, Loc);
}
return E;
}
+static Expr *BuildExpressionFromNonTypeTemplateArgumentValue(
+ Sema &S, QualType T, const APValue &Val, SourceLocation Loc) {
+ auto MakeInitList = [&](ArrayRef<Expr *> Elts) -> Expr * {
+ auto *ILE = new (S.Context) InitListExpr(S.Context, Loc, Elts, Loc);
+ ILE->setType(T);
+ return ILE;
+ };
+
+ switch (Val.getKind()) {
+ case APValue::AddrLabelDiff:
+ // This cannot occur in a template argument at all.
+ case APValue::Array:
+ case APValue::Struct:
+ case APValue::Union:
+ // These can only occur within a template parameter object, which is
+ // represented as a TemplateArgument::Declaration.
+ llvm_unreachable("unexpected template argument value");
+
+ case APValue::Int:
+ return BuildExpressionFromIntegralTemplateArgumentValue(S, T, Val.getInt(),
+ Loc);
+
+ case APValue::Float:
+ return FloatingLiteral::Create(S.Context, Val.getFloat(), /*IsExact=*/true,
+ T, Loc);
+
+ case APValue::FixedPoint:
+ return FixedPointLiteral::CreateFromRawInt(
+ S.Context, Val.getFixedPoint().getValue(), T, Loc,
+ Val.getFixedPoint().getScale());
+
+ case APValue::ComplexInt: {
+ QualType ElemT = T->castAs<ComplexType>()->getElementType();
+ return MakeInitList({BuildExpressionFromIntegralTemplateArgumentValue(
+ S, ElemT, Val.getComplexIntReal(), Loc),
+ BuildExpressionFromIntegralTemplateArgumentValue(
+ S, ElemT, Val.getComplexIntImag(), Loc)});
+ }
+
+ case APValue::ComplexFloat: {
+ QualType ElemT = T->castAs<ComplexType>()->getElementType();
+ return MakeInitList(
+ {FloatingLiteral::Create(S.Context, Val.getComplexFloatReal(), true,
+ ElemT, Loc),
+ FloatingLiteral::Create(S.Context, Val.getComplexFloatImag(), true,
+ ElemT, Loc)});
+ }
+
+ case APValue::Vector: {
+ QualType ElemT = T->castAs<VectorType>()->getElementType();
+ llvm::SmallVector<Expr *, 8> Elts;
+ for (unsigned I = 0, N = Val.getVectorLength(); I != N; ++I)
+ Elts.push_back(BuildExpressionFromNonTypeTemplateArgumentValue(
+ S, ElemT, Val.getVectorElt(I), Loc));
+ return MakeInitList(Elts);
+ }
+
+ case APValue::None:
+ case APValue::Indeterminate:
+ llvm_unreachable("Unexpected APValue kind.");
+ case APValue::LValue:
+ case APValue::MemberPointer:
+ // There isn't necessarily a valid equivalent source-level syntax for
+ // these; in particular, a naive lowering might violate access control.
+ // So for now we lower to a ConstantExpr holding the value, wrapped around
+ // an OpaqueValueExpr.
+ // FIXME: We should have a better representation for this.
+ ExprValueKind VK = VK_PRValue;
+ if (T->isReferenceType()) {
+ T = T->getPointeeType();
+ VK = VK_LValue;
+ }
+ auto *OVE = new (S.Context) OpaqueValueExpr(Loc, T, VK);
+ return ConstantExpr::Create(S.Context, OVE, Val);
+ }
+ llvm_unreachable("Unhandled APValue::ValueKind enum");
+}
+
+ExprResult
+Sema::BuildExpressionFromNonTypeTemplateArgument(const TemplateArgument &Arg,
+ SourceLocation Loc) {
+ switch (Arg.getKind()) {
+ case TemplateArgument::Null:
+ case TemplateArgument::Type:
+ case TemplateArgument::Template:
+ case TemplateArgument::TemplateExpansion:
+ case TemplateArgument::Pack:
+ llvm_unreachable("not a non-type template argument");
+
+ case TemplateArgument::Expression:
+ return Arg.getAsExpr();
+
+ case TemplateArgument::NullPtr:
+ case TemplateArgument::Declaration:
+ return BuildExpressionFromDeclTemplateArgument(
+ Arg, Arg.getNonTypeTemplateArgumentType(), Loc);
+
+ case TemplateArgument::Integral:
+ return BuildExpressionFromIntegralTemplateArgumentValue(
+ *this, Arg.getIntegralType(), Arg.getAsIntegral(), Loc);
+
+ case TemplateArgument::StructuralValue:
+ return BuildExpressionFromNonTypeTemplateArgumentValue(
+ *this, Arg.getStructuralValueType(), Arg.getAsStructuralValue(), Loc);
+ }
+ llvm_unreachable("Unhandled TemplateArgument::ArgKind enum");
+}
+
/// Match two template parameters within template parameter lists.
static bool MatchTemplateParameterKind(
Sema &S, NamedDecl *New,
diff --git a/clang/lib/Sema/SemaTemplateDeduction.cpp b/clang/lib/Sema/SemaTemplateDeduction.cpp
index 015b0abaf0e5ee..e9e7ab5bb6698a 100644
--- a/clang/lib/Sema/SemaTemplateDeduction.cpp
+++ b/clang/lib/Sema/SemaTemplateDeduction.cpp
@@ -268,6 +268,16 @@ checkDeducedTemplateArguments(ASTContext &Context,
// All other combinations are incompatible.
return DeducedTemplateArgument();
+ case TemplateArgument::StructuralValue:
+ // If we deduced a value and a dependent expression, keep the value.
+ if (Y.getKind() == TemplateArgument::Expression ||
+ (Y.getKind() == TemplateArgument::StructuralValue &&
+ X.structurallyEquals(Y)))
+ return X;
+
+ // All other combinations are incompatible.
+ return DeducedTemplateArgument();
+
case TemplateArgument::Template:
if (Y.getKind() == TemplateArgument::Template &&
Context.hasSameTemplateName(X.getAsTemplate(), Y.getAsTemplate()))
@@ -2300,27 +2310,45 @@ DeduceTemplateArguments(Sema &S, TemplateParameterList *TemplateParams,
Info.SecondArg = A;
return Sema::TDK_NonDeducedMismatch;
+ case TemplateArgument::StructuralValue:
+ if (A.getKind() == TemplateArgument::StructuralValue &&
+ A.structurallyEquals(P))
+ return Sema::TDK_Success;
+
+ Info.FirstArg = P;
+ Info.SecondArg = A;
+ return Sema::TDK_NonDeducedMismatch;
+
case TemplateArgument::Expression:
if (const NonTypeTemplateParmDecl *NTTP =
getDeducedParameterFromExpr(Info, P.getAsExpr())) {
- if (A.getKind() == TemplateArgument::Integral)
+ switch (A.getKind()) {
+ case TemplateArgument::Integral:
+ case TemplateArgument::Expression:
+ case TemplateArgument::StructuralValue:
return DeduceNonTypeTemplateArgument(
- S, TemplateParams, NTTP, A.getAsIntegral(), A.getIntegralType(),
- /*ArrayBound=*/false, Info, Deduced);
- if (A.getKind() == TemplateArgument::NullPtr)
+ S, TemplateParams, NTTP, DeducedTemplateArgument(A),
+ A.getNonTypeTemplateArgumentType(), Info, Deduced);
+
+ case TemplateArgument::NullPtr:
return DeduceNullPtrTemplateArgument(S, TemplateParams, NTTP,
A.getNullPtrType(), Info, Deduced);
- if (A.getKind() == TemplateArgument::Expression)
- return DeduceNonTypeTemplateArgument(S, TemplateParams, NTTP,
- A.getAsExpr(), Info, Deduced);
- if (A.getKind() == TemplateArgument::Declaration)
+
+ case TemplateArgument::Declaration:
return DeduceNonTypeTemplateArgument(
S, TemplateParams, NTTP, A.getAsDecl(), A.getParamTypeForDecl(),
Info, Deduced);
- Info.FirstArg = P;
- Info.SecondArg = A;
- return Sema::TDK_NonDeducedMismatch;
+ case TemplateArgument::Null:
+ case TemplateArgument::Type:
+ case TemplateArgument::Template:
+ case TemplateArgument::TemplateExpansion:
+ case TemplateArgument::Pack:
+ Info.FirstArg = P;
+ Info.SecondArg = A;
+ return Sema::TDK_NonDeducedMismatch;
+ }
+ llvm_unreachable("Unknown template argument kind");
}
// Can't deduce anything, but that's okay.
@@ -2505,6 +2533,9 @@ static bool isSameTemplateArg(ASTContext &Context,
case TemplateArgument::Integral:
return hasSameExtendedValue(X.getAsIntegral(), Y.getAsIntegral());
+ case TemplateArgument::StructuralValue:
+ return X.structurallyEquals(Y);
+
case TemplateArgument::Expression: {
llvm::FoldingSetNodeID XID, YID;
X.getAsExpr()->Profile(XID, Context, true);
@@ -2585,9 +2616,9 @@ Sema::getTrivialTemplateArgumentLoc(const TemplateArgument &Arg,
E);
}
- case TemplateArgument::Integral: {
- Expr *E =
- BuildExpressionFromIntegralTemplateArgument(Arg, Loc).getAs<Expr>();
+ case TemplateArgument::Integral:
+ case TemplateArgument::StructuralValue: {
+ Expr *E = BuildExpressionFromNonTypeTemplateArgument(Arg, Loc).get();
return TemplateArgumentLoc(TemplateArgument(E), E);
}
@@ -6449,11 +6480,8 @@ MarkUsedTemplateParameters(ASTContext &Ctx,
case TemplateArgument::Null:
case TemplateArgument::Integral:
case TemplateArgument::Declaration:
- break;
-
case TemplateArgument::NullPtr:
- MarkUsedTemplateParameters(Ctx, TemplateArg.getNullPtrType(), OnlyDeduced,
- Depth, Used);
+ case TemplateArgument::StructuralValue:
break;
case TemplateArgument::Type:
diff --git a/clang/lib/Sema/SemaTemplateInstantiate.cpp b/clang/lib/Sema/SemaTemplateInstantiate.cpp
index fc80515b45e35b..e12186d7d82f8d 100644
--- a/clang/lib/Sema/SemaTemplateInstantiate.cpp
+++ b/clang/lib/Sema/SemaTemplateInstantiate.cpp
@@ -1975,9 +1975,8 @@ ExprResult TemplateInstantiator::transformNonTypeTemplateParmRef(
}
} else if (arg.getKind() == TemplateArgument::Declaration ||
arg.getKind() == TemplateArgument::NullPtr) {
- ValueDecl *VD;
if (arg.getKind() == TemplateArgument::Declaration) {
- VD = arg.getAsDecl();
+ ValueDecl *VD = arg.getAsDecl();
// Find the instantiation of the template argument. This is
// required for nested templates.
@@ -1985,21 +1984,20 @@ ExprResult TemplateInstantiator::transformNonTypeTemplateParmRef(
getSema().FindInstantiatedDecl(loc, VD, TemplateArgs));
if (!VD)
return ExprError();
- } else {
- // Propagate NULL template argument.
- VD = nullptr;
}
- QualType paramType = VD ? arg.getParamTypeForDecl() : arg.getNullPtrType();
+ QualType paramType = arg.getNonTypeTemplateArgumentType();
assert(!paramType.isNull() && "type substitution failed for param type");
assert(!paramType->isDependentType() && "param type still dependent");
result = SemaRef.BuildExpressionFromDeclTemplateArgument(arg, paramType, loc);
refParam = paramType->isReferenceType();
} else {
- result = SemaRef.BuildExpressionFromIntegralTemplateArgument(arg, loc);
+ QualType paramType = arg.getNonTypeTemplateArgumentType();
+ result = SemaRef.BuildExpressionFromNonTypeTemplateArgument(arg, loc);
+ refParam = paramType->isReferenceType();
assert(result.isInvalid() ||
SemaRef.Context.hasSameType(result.get()->getType(),
- arg.getIntegralType()));
+ paramType.getNonReferenceType()));
}
if (result.isInvalid())
diff --git a/clang/lib/Sema/SemaTemplateVariadic.cpp b/clang/lib/Sema/SemaTemplateVariadic.cpp
index 0f4e9e7f94c81e..4a7872b2cc73c5 100644
--- a/clang/lib/Sema/SemaTemplateVariadic.cpp
+++ b/clang/lib/Sema/SemaTemplateVariadic.cpp
@@ -1112,6 +1112,7 @@ TemplateArgumentLoc Sema::getTemplateArgumentPackExpansionPattern(
case TemplateArgument::NullPtr:
case TemplateArgument::Template:
case TemplateArgument::Integral:
+ case TemplateArgument::StructuralValue:
case TemplateArgument::Pack:
case TemplateArgument::Null:
return TemplateArgumentLoc();
@@ -1162,6 +1163,7 @@ std::optional<unsigned> Sema::getFullyPackExpandedSize(TemplateArgument Arg) {
case TemplateArgument::NullPtr:
case TemplateArgument::TemplateExpansion:
case TemplateArgument::Integral:
+ case TemplateArgument::StructuralValue:
case TemplateArgument::Pack:
case TemplateArgument::Null:
return std::nullopt;
diff --git a/clang/lib/Sema/TreeTransform.h b/clang/lib/Sema/TreeTransform.h
index 4463904b07211b..2deac7877fcda7 100644
--- a/clang/lib/Sema/TreeTransform.h
+++ b/clang/lib/Sema/TreeTransform.h
@@ -3908,6 +3908,7 @@ class TreeTransform {
case TemplateArgument::Null:
case TemplateArgument::Integral:
case TemplateArgument::Declaration:
+ case TemplateArgument::StructuralValue:
case TemplateArgument::Pack:
case TemplateArgument::TemplateExpansion:
case TemplateArgument::NullPtr:
@@ -4577,7 +4578,8 @@ bool TreeTransform<Derived>::TransformTemplateArgument(
case TemplateArgument::Integral:
case TemplateArgument::NullPtr:
- case TemplateArgument::Declaration: {
+ case TemplateArgument::Declaration:
+ case TemplateArgument::StructuralValue: {
// Transform a resolved template argument straight to a resolved template
// argument. We get here when substituting into an already-substituted
// template type argument during concept satisfaction checking.
@@ -4604,9 +4606,15 @@ bool TreeTransform<Derived>::TransformTemplateArgument(
else if (Arg.getKind() == TemplateArgument::NullPtr)
Output = TemplateArgumentLoc(TemplateArgument(NewT, /*IsNullPtr=*/true),
TemplateArgumentLocInfo());
- else
+ else if (Arg.getKind() == TemplateArgument::Declaration)
Output = TemplateArgumentLoc(TemplateArgument(NewD, NewT),
TemplateArgumentLocInfo());
+ else if (Arg.getKind() == TemplateArgument::StructuralValue)
+ Output = TemplateArgumentLoc(
+ TemplateArgument(getSema().Context, NewT, Arg.getAsStructuralValue()),
+ TemplateArgumentLocInfo());
+ else
+ llvm_unreachable("unexpected template argument kind");
return false;
}
diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index 287f9a0300be5c..fe8782a3eb9e7c 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -7460,6 +7460,7 @@ ASTRecordReader::readTemplateArgumentLocInfo(TemplateArgument::ArgKind Kind) {
case TemplateArgument::Integral:
case TemplateArgument::Declaration:
case TemplateArgument::NullPtr:
+ case TemplateArgument::StructuralValue:
case TemplateArgument::Pack:
// FIXME: Is this right?
return TemplateArgumentLocInfo();
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index a3fa99c3d7e49f..03bddfe0f5047d 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -5609,6 +5609,7 @@ void ASTRecordWriter::AddTemplateArgumentLocInfo(
case TemplateArgument::Integral:
case TemplateArgument::Declaration:
case TemplateArgument::NullPtr:
+ case TemplateArgument::StructuralValue:
case TemplateArgument::Pack:
// FIXME: Is this right?
break;
diff --git a/clang/test/CXX/drs/dr18xx.cpp b/clang/test/CXX/drs/dr18xx.cpp
index f2c056e13ecad7..37ea450137ac5e 100644
--- a/clang/test/CXX/drs/dr18xx.cpp
+++ b/clang/test/CXX/drs/dr18xx.cpp
@@ -1,7 +1,7 @@
// RUN: %clang_cc1 -std=c++98 -triple x86_64-unknown-unknown %s -verify=expected,cxx98-14,cxx98 -fexceptions -Wno-deprecated-builtins -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-unknown %s -verify=expected,cxx98-14,cxx11-17,since-cxx11 -fexceptions -Wno-deprecated-builtins -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++14 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx14,cxx98-14,cxx11-17,since-cxx11,since-cxx14 -fexceptions -Wno-deprecated-builtins -fcxx-exceptions -pedantic-errors
-// RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx14,since-cxx17,cxx11-17,since-cxx11,since-cxx14 -fexceptions -Wno-deprecated-builtins -fcxx-exceptions -pedantic-errors
+// RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx14,since-cxx17,cxx11-17,since-cxx11,since-cxx14,cxx17 -fexceptions -Wno-deprecated-builtins -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx14,since-cxx17,since-cxx20,since-cxx11,since-cxx14 -fexceptions -Wno-deprecated-builtins -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx14,since-cxx17,since-cxx20,since-cxx11,since-cxx14 -fexceptions -Wno-deprecated-builtins -fcxx-exceptions -pedantic-errors
// RUN: %clang_cc1 -std=c++2c -triple x86_64-unknown-unknown %s -verify=expected,since-cxx14,since-cxx17,since-cxx20,since-cxx11,since-cxx14 -fexceptions -Wno-deprecated-builtins -fcxx-exceptions -pedantic-errors
@@ -25,7 +25,7 @@ template <int &> struct S {}; // #dr1801-S
S<i> V; // #dr1801-S-i
// cxx98-14-error at -1 {{non-type template argument does not refer to any declaration}}
// cxx98-14-note@#dr1801-S {{template parameter is declared here}}
-// since-cxx17-error@#dr1801-S-i {{non-type template argument refers to subobject '.i'}}
+// cxx17-error@#dr1801-S-i {{non-type template argument refers to subobject '.i'}}
}
namespace dr1802 { // dr1802: 3.1
diff --git a/clang/test/CXX/temp/temp.arg/temp.arg.nontype/p1.cpp b/clang/test/CXX/temp/temp.arg/temp.arg.nontype/p1.cpp
index a17720c9267ccf..7fce6155169245 100644
--- a/clang/test/CXX/temp/temp.arg/temp.arg.nontype/p1.cpp
+++ b/clang/test/CXX/temp/temp.arg/temp.arg.nontype/p1.cpp
@@ -200,7 +200,9 @@ namespace bad_args {
// cxx17-note at -3 {{reinterpret_cast}}
X0<__builtin_constant_p(0) ? (int*)1 : (int*)1> x0d;
// precxx17-error at -1 {{non-type template argument '(int *)1' is invalid}}
- // cxx17-error at -2 {{non-type template argument refers to subobject '(int *)1'}}
+#if __cplusplus == 201703L
+ // cxx17-error at -3 {{non-type template argument refers to subobject '(int *)1'}}
+#endif
}
#endif // CPP11ONLY
diff --git a/clang/test/CodeGenCXX/mangle-ms-templates.cpp b/clang/test/CodeGenCXX/mangle-ms-templates.cpp
index cefe1e0cb5a550..ec4250edf314f7 100644
--- a/clang/test/CodeGenCXX/mangle-ms-templates.cpp
+++ b/clang/test/CodeGenCXX/mangle-ms-templates.cpp
@@ -2,6 +2,21 @@
// RUN: %clang_cc1 -std=c++11 -fms-compatibility-version=19 -emit-llvm %s -o - -fms-extensions -fdelayed-template-parsing -triple=x86_64-pc-win32 | FileCheck -check-prefix X64 %s
// RUN: %clang_cc1 -std=c++17 -fms-compatibility-version=19 -emit-llvm %s -o - -fms-extensions -fdelayed-template-parsing -triple=i386-pc-win32 | FileCheck %s
// RUN: %clang_cc1 -std=c++17 -fms-compatibility-version=19 -emit-llvm %s -o - -fms-extensions -fdelayed-template-parsing -triple=x86_64-pc-win32 | FileCheck -check-prefix X64 %s
+// RUN: %clang_cc1 -std=c++20 -fms-compatibility-version=19 -emit-llvm %s -o - -fms-extensions -fdelayed-template-parsing -triple=x86_64-pc-win32 | FileCheck -check-prefix CXX20-X64 %s
+
+// Check that array-to-pointer decay is mangled as the underlying declaration.
+extern const char arr[4] = "foo";
+template<const char*> struct Decay1 {};
+// CHECK: "?decay1@@3U?$Decay1@$1?arr@@3QBDB@@A"
+Decay1<arr> decay1;
+#if __cplusplus >= 201702L
+// Note that this mangling approach can lead to collisions.
+template<const void*> struct Decay2 {};
+// CXX20-X64: "?decay2a@@3U?$Decay2@$1?arr@@3QBDB@@A"
+Decay2<(const void*)arr> decay2a;
+// CXX20-X64: "?decay2b@@3U?$Decay2@$1?arr@@3QBDB@@A"
+Decay2<(const void*)&arr> decay2b;
+#endif
template<typename T>
class Class {
@@ -327,3 +342,36 @@ void fun_uint128(UInt128<(unsigned __int128)-1>) {}
// X64: define {{.*}} @"?fun_uint128@@YAXU?$UInt128@$0DPPPPPPPPPPPPPPPAAAAAAAAAAAAAAAB@@@@Z"(
void fun_uint128(UInt128<(unsigned __int128)9223372036854775807 * (unsigned __int128)9223372036854775807>) {}
#endif
+
+#if __cplusplus >= 202002L
+
+template<float> struct Float {};
+// CXX20-X64: define {{.*}} @"?f@@YAXU?$Float@$ADPIAAAAA@@@@Z"(
+void f(Float<1.0f>) {}
+template<auto> struct Auto {};
+// CXX20-X64: define {{.*}} @"?f@@YAXU?$Auto@$MMADPIAAAAA@@@@Z"(
+void f(Auto<1.0f>) {}
+
+struct S2 {
+ int arr[2][3];
+ int i;
+ void fn();
+} s2;
+
+template<int&> struct TplSubobjectRef {};
+// CXX20-X64: define {{.*}} @"?f@@YAXU?$TplSubobjectRef@$CC61?s2@@3US2@@Aarr@@00 at 01@@@@Z"(
+void f(TplSubobjectRef<s2.arr[1][2]>) {}
+template<int*> struct TplSubobjectPtr {};
+// CXX20-X64: define {{.*}} @"?f@@YAXU?$TplSubobjectPtr@$CC61?s2@@3US2@@Aarr@@00 at 01@@@@Z"(
+void f(TplSubobjectPtr<&s2.arr[1][2]>) {}
+
+struct Derived : S2 {};
+
+template <int Derived::*> struct TplMemberPtr {};
+// CXX20-X64: define {{.*}} @"?f@@YAXU?$TplMemberPtr@$0BI@@@@Z"(
+void f(TplMemberPtr<(int Derived::*)&S2::i>) {}
+template <void (Derived::*)()> struct TplMemberFnPtr {};
+// CXX20-X64: define {{.*}} @"?f@@YAXU?$TplMemberFnPtr@$1?fn at S2@@QEAAXXZ@@@Z"(
+void f(TplMemberFnPtr<(void (Derived::*)())&S2::fn>) {}
+
+#endif
diff --git a/clang/test/CodeGenCXX/mangle-template.cpp b/clang/test/CodeGenCXX/mangle-template.cpp
index 8415bacbb9fc6d..a4cb22739ac2a9 100644
--- a/clang/test/CodeGenCXX/mangle-template.cpp
+++ b/clang/test/CodeGenCXX/mangle-template.cpp
@@ -225,6 +225,16 @@ namespace test16 {
namespace cxx20 {
template<auto> struct A {};
template<typename T, T V> struct B {};
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1AILf3f800000EEE(
+ void f(A<1.0f>) {}
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1AILd3ff0000000000000EEE(
+ void f(A<1.0>) {}
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1AILe3fff8000000000000000EEE(
+ void f(A<1.0l>) {}
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1AIXtlCiLi0ELi1EEEEE(
+ void f(A<1i>) {}
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1AIXtlCdLd0000000000000000ELd3ff0000000000000EEEEE(
+ void f(A<1.0i>) {}
int x;
// CXX20: define {{.*}} @_ZN5cxx201fENS_1AIXadL_ZNS_1xEEEEE(
@@ -244,7 +254,24 @@ namespace cxx20 {
// CXX20: define {{.*}} @_ZN5cxx201fENS_1BIPKvXadL_ZNS_1xEEEEE(
void f(B<const void*, (const void*)&x>) {}
- struct Q { int x; };
+ struct Q { int x; } q;
+
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1AIXadsoiL_ZNS_1qEEEEEE(
+ void f(A<&q.x>) {}
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1BIPiXadsoiL_ZNS_1qEEEEEE(
+ void f(B<int*, &q.x>) {}
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1AIXadsoKiL_ZNS_1qEEEEEE(
+ void f(A<(const int*)&q.x>) {}
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1BIPKiXadsoS1_L_ZNS_1qEEEEEE
+ void f(B<const int*, (const int*)&q.x>) {}
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1AIXcvPvadsoiL_ZNS_1qEEEEEE(
+ void f(A<(void*)&q.x>) {}
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1BIPvXadsoiL_ZNS_1qEEEEEE(
+ void f(B<void*, (void*)&q.x>) {}
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1AIXcvPKvadsoiL_ZNS_1qEEEEEE(
+ void f(A<(const void*)&q.x>) {}
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1BIPKvXadsoiL_ZNS_1qEEEEEE(
+ void f(B<const void*, (const void*)&q.x>) {}
// CXX20: define {{.*}} @_ZN5cxx201fENS_1AIXadL_ZNS_1Q1xEEEEE(
void f(A<&Q::x>) {}
@@ -254,6 +281,17 @@ namespace cxx20 {
void f(A<(const int Q::*)&Q::x>) {}
// CXX20: define {{.*}} @_ZN5cxx201fENS_1BIMNS_1QEKiXadL_ZNS1_1xEEEEE(
void f(B<const int Q::*, (const int Q::*)&Q::x>) {}
+
+ struct R : Q {};
+
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1AIXmcMNS_1REiadL_ZNS_1Q1xEEEEEE(
+ void f(A<(int R::*)&Q::x>) {}
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1BIMNS_1REiXmcS2_adL_ZNS_1Q1xEEEEEE(
+ void f(B<int R::*, (int R::*)&Q::x>) {}
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1AIXmcMNS_1REKiadL_ZNS_1Q1xEEEEEE(
+ void f(A<(const int R::*)&Q::x>) {}
+ // CXX20: define {{.*}} @_ZN5cxx201fENS_1BIMNS_1REKiXmcS3_adL_ZNS_1Q1xEEEEEE(
+ void f(B<const int R::*, (const int R::*)&Q::x>) {}
}
#endif
diff --git a/clang/test/CodeGenCXX/template-arguments.cpp b/clang/test/CodeGenCXX/template-arguments.cpp
new file mode 100644
index 00000000000000..14a454937122aa
--- /dev/null
+++ b/clang/test/CodeGenCXX/template-arguments.cpp
@@ -0,0 +1,113 @@
+// RUN: %clang_cc1 -std=c++20 %s -emit-llvm -o - -triple x86_64-linux -DCONSTEXPR= | FileCheck %s
+// RUN: %clang_cc1 -std=c++20 %s -emit-llvm -o - -triple x86_64-linux -DCONSTEXPR=constexpr | FileCheck %s --check-prefix=CONST
+
+template<typename T> CONSTEXPR T id(T v) { return v; }
+template<auto V> auto value = id(V);
+
+// CHECK: call {{.*}} @_Z2idIiET_S0_(i32 noundef 1)
+// CONST: @_Z5valueILi1EE = weak_odr {{.*}} i32 1,
+template int value<1>;
+
+// CHECK: call {{.*}} @_Z2idIyET_S0_(i64 noundef -1)
+// CONST: @_Z5valueILy18446744073709551615EE = weak_odr {{.*}} i64 -1,
+template unsigned long long value<-1ULL>;
+
+// CHECK: call {{.*}} @_Z2idIfET_S0_(float noundef 1.000000e+00)
+// CONST: @_Z5valueILf3f800000EE = weak_odr {{.*}} float 1.000000e+00,
+template float value<1.0f>;
+// CHECK: call {{.*}} @_Z2idIdET_S0_(double noundef 1.000000e+00)
+// CONST: @_Z5valueILd3ff0000000000000EE = weak_odr {{.*}} double 1.000000e+00,
+template double value<1.0>;
+
+enum E{ E1, E2};
+
+// CHECK: call {{.*}} @_Z2idI1EET_S1_(i32 noundef 1)
+// CONST: @_Z5valueIL1E1EE = weak_odr {{.*}} i32 1,
+template E value<E2>;
+
+int n;
+// CHECK: call {{.*}} @_Z2idIPiET_S1_(ptr noundef @n)
+// CONST: @_Z5valueIXadL_Z1nEEE = weak_odr {{.*}} ptr @n,
+template int *value<&n>;
+
+struct A { int a[3]; } a;
+// CHECK: call {{.*}} @_Z2idIPiET_S1_(ptr noundef @a)
+// CONST: @_Z5valueIXadsoiL_Z1aEEEE = weak_odr {{.*}} ptr @a,
+template int *value<&a.a[0]>;
+// CHECK: call {{.*}} @_Z2idIPiET_S1_(ptr noundef getelementptr (i8, ptr @a, i64 4))
+// CONST: @_Z5valueIXadsoiL_Z1aE4EEE = weak_odr {{.*}} ptr getelementptr (i8, ptr @a, i64 4),
+template int *value<&a.a[1]>;
+// CHECK: call {{.*}} @_Z2idIPiET_S1_(ptr noundef getelementptr (i8, ptr @a, i64 8))
+// CONST: @_Z5valueIXadsoiL_Z1aE8EEE = weak_odr {{.*}} ptr getelementptr (i8, ptr @a, i64 8),
+template int *value<&a.a[2]>;
+// CHECK: call {{.*}} @_Z2idIPiET_S1_(ptr noundef getelementptr (i8, ptr @a, i64 12))
+// CONST: @_Z5valueIXadsoiL_Z1aE12pEEE = weak_odr {{.*}} ptr getelementptr (i8, ptr @a, i64 12),
+template int *value<&a.a[3]>;
+
+union U {
+ int x, y;
+ union {
+ int x, y;
+ } internal;
+} u;
+
+// CHECK: call {{.*}} @_Z2idIPiET_S1_(ptr noundef @u)
+// CONST: @_Z5valueIXadsoiL_Z1uE_EEE = weak_odr {{.*}} ptr @u,
+template int *value<&u.x>;
+// CHECK: call {{.*}} @_Z2idIPiET_S1_(ptr noundef @u)
+// CONST: @_Z5valueIXadsoiL_Z1uE_0EEE = weak_odr {{.*}} ptr @u,
+template int *value<&u.y>;
+// CHECK: call {{.*}} @_Z2idIPiET_S1_(ptr noundef @u)
+// CONST: @_Z5valueIXadsoiL_Z1uE_1_0EEE = weak_odr {{.*}} ptr @u,
+template int *value<&u.internal.y>;
+
+struct B { int x, y; };
+// CHECK: call {{.*}} @_Z2idIM1BiET_S2_(i64 0)
+// CONST: @_Z5valueIXadL_ZN1B1xEEEE = weak_odr {{.*}} i64 0,
+template int B::*value<&B::x>;
+// CHECK: call {{.*}} @_Z2idIM1BiET_S2_(i64 4)
+// CONST: @_Z5valueIXadL_ZN1B1yEEEE = weak_odr {{.*}} i64 4,
+template int B::*value<&B::y>;
+
+struct C : A, B { int z; };
+// CHECK: call {{.*}} @_Z2idIM1CiET_S2_(i64 12)
+// CONST: @_Z5valueIXmcM1CiadL_ZN1B1xEE12EEE = weak_odr {{.*}} i64 12,
+template int C::*value<(int C::*)&B::x>;
+// CHECK: call {{.*}} @_Z2idIM1BiET_S2_(i64 8)
+// CONST: @_Z5valueIXmcM1BiadL_ZN1C1zEEn12EEE = weak_odr {{.*}} i64 8,
+template int B::*value<(int B::*)&C::z>;
+
+// CHECK: store i32 1,
+// CHECK: store i32 2,
+// CHECK: load i64,
+// CHECK: call {{.*}} @_Z2idICiET_S1_(i64 noundef %
+// CONST: @_Z5valueIXtlCiLi1ELi2EEEE = weak_odr {{.*}} { i32, i32 } { i32 1, i32 2 },
+template _Complex int value<1 + 2j>;
+
+// CHECK: store float 1.000000e+00,
+// CHECK: store float 2.000000e+00,
+// CHECK: load <2 x float>,
+// CHECK: call {{.*}} @_Z2idICfET_S1_(<2 x float> noundef %
+// CONST: @_Z5valueIXtlCfLf3f800000ELf40000000EEEE = weak_odr {{.*}} { float, float } { float 1.000000e+00, float 2.000000e+00 },
+template _Complex float value<1.0f + 2.0fj>;
+
+using V3i __attribute__((ext_vector_type(3))) = int;
+// CHECK: call {{.*}} @_Z2idIDv3_iET_S1_(<3 x i32> noundef <i32 1, i32 2, i32 3>)
+// CONST: @_Z5valueIXtlDv3_iLi1ELi2ELi3EEEE = weak_odr {{.*}} <3 x i32> <i32 1, i32 2, i32 3>
+template V3i value<V3i{1, 2, 3}>;
+
+using V3f [[gnu::vector_size(12)]] = float;
+// CHECK: call {{.*}} @_Z2idIDv3_fET_S1_(<3 x float> noundef <float 1.000000e+00, float 2.000000e+00, float 3.000000e+00>)
+// CONST: @_Z5valueIXtlDv3_fLf3f800000ELf40000000ELf40400000EEEE = weak_odr {{.*}} <3 x float> <float 1.000000e+00, float 2.000000e+00, float 3.000000e+00>
+template V3f value<V3f{1, 2, 3}>;
+
+
+template <int& i>
+void setByRef() {
+ i = 1;
+}
+
+void callSetByRefWithSubobject() {
+ // CHECK: store i32 1, ptr getelementptr (i8, ptr @a, i64 4)
+ setByRef<a.a[1]>();
+}
diff --git a/clang/test/Index/USR/structural-value-tpl-arg.cpp b/clang/test/Index/USR/structural-value-tpl-arg.cpp
new file mode 100644
index 00000000000000..8130012451691c
--- /dev/null
+++ b/clang/test/Index/USR/structural-value-tpl-arg.cpp
@@ -0,0 +1,23 @@
+// RUN: c-index-test -test-load-source-usrs local -std=c++20 -- %s | FileCheck %s
+
+// Check USRs of template specializations with structural NTTP values.
+
+template <auto> struct Tpl{};
+
+struct {
+ int n;
+} s;
+
+void fn1(Tpl<1.5>);
+// CHECK: fn1#$@S at Tpl>#Sd[[#HASH:]]#
+void fn2(Tpl<1.7>);
+// CHECK-NOT: [[#HASH]]
+void fn1(Tpl<1.5>) {}
+// CHECK: fn1#$@S at Tpl>#Sd[[#HASH]]#
+
+void fn(Tpl<&s.n>);
+// CHECK: #S*I[[#HASH:]]#
+void fn(Tpl<(void*)&s.n>);
+// CHECK: #S*v[[#HASH]]#
+void fn(Tpl<&s.n>) {}
+// CHECK: #S*I[[#HASH]]#
diff --git a/clang/test/Modules/odr_hash.cpp b/clang/test/Modules/odr_hash.cpp
index 220ef767df849a..fa8b2c81ab46e1 100644
--- a/clang/test/Modules/odr_hash.cpp
+++ b/clang/test/Modules/odr_hash.cpp
@@ -13,8 +13,8 @@
// RUN: cat %s >> %t/Inputs/second.h
// Test that each header can compile
-// RUN: %clang_cc1 -fsyntax-only -x c++ -std=c++1z %t/Inputs/first.h
-// RUN: %clang_cc1 -fsyntax-only -x c++ -std=c++1z %t/Inputs/second.h
+// RUN: %clang_cc1 -fsyntax-only -x c++ -std=c++20 %t/Inputs/first.h
+// RUN: %clang_cc1 -fsyntax-only -x c++ -std=c++20 %t/Inputs/second.h
// Build module map file
// RUN: echo "module FirstModule {" >> %t/Inputs/module.modulemap
@@ -25,7 +25,7 @@
// RUN: echo "}" >> %t/Inputs/module.modulemap
// Run test
-// RUN: %clang_cc1 -triple x86_64-linux-gnu -x c++ -std=c++1z \
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -x c++ -std=c++20 \
// RUN: -fmodules -fimplicit-module-maps -fmodules-cache-path=%t/cache \
// RUN: -I%t/Inputs -verify %s
@@ -2093,6 +2093,193 @@ struct S21 {
S21 s21;
#endif
+#if defined(FIRST)
+struct S22 {
+ template <double> void f(){};
+ template <> void f<1.5>(){};
+};
+#elif defined(SECOND)
+struct S22 {
+ template <double> void f(){};
+ template <> void f<1.7>(){};
+};
+#else
+S22 s22;
+// expected-error at second.h:* {{'TemplateArgument::S22' has
diff erent definitions in
diff erent modules; first
diff erence is definition in module 'SecondModule' found method 'f' with 1.700000e+00 for 1st template argument}}
+// expected-note at first.h:* {{but in 'FirstModule' found method 'f' with 1.500000e+00 for 1st template argument}}
+#endif
+
+#if defined(FIRST)
+struct S23 {
+ template <double> void f(){};
+ template <> void f<2.7>(){};
+};
+#elif defined(SECOND)
+struct S23 {
+ template <double> void f(){};
+ template <> void f<2.7>(){};
+};
+#else
+S23 s23;
+#endif
+
+#if defined(FIRST) || defined(SECOND)
+struct Composite {
+ int n1[4];
+ int n2[4];
+};
+extern Composite composite;
+#endif
+
+#if defined(FIRST)
+struct S24 {
+ template <int&> void f(){};
+ template <> void f<composite.n1[1]>(){};
+};
+#elif defined(SECOND)
+struct S24 {
+ template <int&> void f(){};
+ template <> void f<composite.n1[2]>(){};
+};
+#else
+S24 s24;
+// expected-error at second.h:* {{'TemplateArgument::S24' has
diff erent definitions in
diff erent modules; first
diff erence is definition in module 'SecondModule' found method 'f' with composite.n1[2] for 1st template argument}}
+// expected-note at first.h:* {{but in 'FirstModule' found method 'f' with composite.n1[1] for 1st template argument}}
+#endif
+
+#if defined(FIRST) || defined(SECOND)
+struct S25 {
+ template <int&> void f();
+ template <> void f<composite.n1[2]>();
+};
+#else
+S25 s25;
+#endif
+
+#if defined(FIRST)
+struct S26 {
+ template <int*> void f(){};
+ template <> void f<&composite.n1[4]>(){}; // Past-the-end pointer.
+};
+#elif defined(SECOND)
+struct S26 {
+ template <int*> void f(){};
+ template <> void f<&composite.n2[0]>(){};
+};
+#else
+S26 s26;
+// expected-error at second.h:* {{'TemplateArgument::S26' has
diff erent definitions in
diff erent modules; first
diff erence is definition in module 'SecondModule' found method 'f' with &composite.n2[0] for 1st template argument}}
+// expected-note at first.h:* {{but in 'FirstModule' found method 'f' with &composite.n1[4] for 1st template argument}}
+#endif
+
+#if defined(FIRST) || defined(SECOND)
+union Union {
+ int i1;
+ int i2;
+};
+extern Union u;
+#endif
+
+#if defined(FIRST)
+struct S27 {
+ template <int&> void f(){};
+ template <> void f<u.i1>(){};
+};
+#elif defined(SECOND)
+struct S27 {
+ template <int&> void f(){};
+ template <> void f<u.i2>(){};
+};
+#else
+S27 s27;
+// expected-error at second.h:* {{'TemplateArgument::S27' has
diff erent definitions in
diff erent modules; first
diff erence is definition in module 'SecondModule' found method 'f' with u.i2 for 1st template argument}}
+// expected-note at first.h:* {{but in 'FirstModule' found method 'f' with u.i1 for 1st template argument}}
+#endif
+
+#if defined(FIRST) || defined(SECOND)
+struct S28 {
+ template <int&> void f(){};
+ template <> void f<u.i1>(){};
+};
+#else
+S28 s28;
+#endif
+
+#if defined(FIRST) || defined(SECOND)
+struct A {
+ int a;
+};
+struct B : A {};
+struct C : A {};
+struct D : B, C {};
+#endif
+
+#if defined(FIRST)
+struct S29 {
+ template <int D::*> void f(){};
+ template <> void f<(int D::*)(int B::*)&A::a>(){};
+};
+#elif defined(SECOND)
+struct S29 {
+ template <int D::*> void f(){};
+ template <> void f<(int D::*)(int C::*)&A::a>(){};
+};
+#else
+S29 s29;
+// expected-error at second.h:* {{'TemplateArgument::S29' has
diff erent definitions in
diff erent modules; first
diff erence is definition in module 'SecondModule' found method 'f' with &A::a for 1st template argument}}
+// expected-note at first.h:* {{but in 'FirstModule' found method 'f' with &A::a for 1st template argument}}
+#endif
+
+#if defined(FIRST) || defined(SECOND)
+struct S30 {
+ template <int D::*> void f(){};
+ template <> void f<(int D::*)(int B::*)&A::a>(){};
+};
+#else
+S30 s30;
+#endif
+
+#if defined(FIRST)
+struct S31 {
+ template <auto*> void f(){};
+ template <> void f<&composite.n1[2]>(){};
+};
+#elif defined(SECOND)
+struct S31 {
+ template <auto*> void f(){};
+ template <> void f<(void*)&composite.n1[2]>(){};
+};
+#else
+S31 s31;
+// expected-error at second.h:* {{'TemplateArgument::S31' has
diff erent definitions in
diff erent modules; first
diff erence is definition in module 'SecondModule' found method 'f' with &composite.n1[2] for 1st template argument}}
+// expected-note at first.h:* {{but in 'FirstModule' found method 'f' with &composite.n1[2] for 1st template argument}}
+#endif
+
+#if defined(FIRST)
+struct S32 {
+ template <int*> void f(){};
+ template <> void f<__builtin_constant_p(0) ? (int*)1 : (int*)1>(){};
+};
+#elif defined(SECOND)
+struct S32 {
+ template <int*> void f(){};
+ template <> void f<__builtin_constant_p(0) ? (int*)2 : (int*)2>(){};
+};
+#else
+S32 s32;
+// expected-error at second.h:* {{'TemplateArgument::S32' has
diff erent definitions in
diff erent modules; first
diff erence is definition in module 'SecondModule' found method 'f' with (int *)2 for 1st template argument}}
+// expected-note at first.h:* {{but in 'FirstModule' found method 'f' with (int *)1 for 1st template argument}}
+#endif
+
+#if defined(FIRST) || defined(SECOND)
+struct S33 {
+ template <int*> void f(){};
+ template <> void f<__builtin_constant_p(0) ? (int*)1 : (int*)1>(){};
+};
+#else
+S33 s33;
+#endif
+
#define DECLS \
OneClass<int> a; \
OneInt<1> b; \
diff --git a/clang/test/SemaCXX/warn-bool-conversion.cpp b/clang/test/SemaCXX/warn-bool-conversion.cpp
index 7b671c52b5b9c0..c81d52d864f2d2 100644
--- a/clang/test/SemaCXX/warn-bool-conversion.cpp
+++ b/clang/test/SemaCXX/warn-bool-conversion.cpp
@@ -186,6 +186,7 @@ namespace macros {
}
}
+#if __cplusplus < 201703L
namespace Template {
// FIXME: These cases should not warn.
template<int *p> void f() { if (p) {} } // expected-warning 2{{will always evaluate to 'true'}} expected-cxx11-warning {{implicit conversion of nullptr}}
@@ -205,3 +206,4 @@ namespace Template {
#endif
template void h<d>();
}
+#endif // __cplusplus < 201703L
diff --git a/clang/test/SemaTemplate/temp_arg_nontype_cxx1z.cpp b/clang/test/SemaTemplate/temp_arg_nontype_cxx1z.cpp
index b54b5a8007408d..ae06055bf52651 100644
--- a/clang/test/SemaTemplate/temp_arg_nontype_cxx1z.cpp
+++ b/clang/test/SemaTemplate/temp_arg_nontype_cxx1z.cpp
@@ -2,7 +2,7 @@
template<typename T, T val> struct A {};
-template<typename T, typename U> constexpr bool is_same = false; // expected-note +{{here}}
+template<typename T, typename U> constexpr bool is_same = false;
template<typename T> constexpr bool is_same<T, T> = true;
namespace String {
@@ -84,34 +84,32 @@ namespace PtrMem {
constexpr int B::*b = &B::b;
constexpr int C::*cb = b;
constexpr int D::*db = b;
- constexpr int E::*ecb = cb; // expected-note +{{here}}
- constexpr int E::*edb = db; // expected-note +{{here}}
+ constexpr int E::*ecb = cb;
+ constexpr int E::*edb = db;
constexpr int E::*e = &E::e;
constexpr int D::*de = (int D::*)e;
constexpr int C::*ce = (int C::*)e;
- constexpr int B::*bde = (int B::*)de; // expected-note +{{here}}
- constexpr int B::*bce = (int B::*)ce; // expected-note +{{here}}
+ constexpr int B::*bde = (int B::*)de;
+ constexpr int B::*bce = (int B::*)ce;
- // FIXME: This should all be accepted, but we don't yet have a representation
- // nor mangling for this form of template argument.
using Ab = A<int B::*, b>;
using Ab = A<int B::*, &B::b>;
- using Abce = A<int B::*, bce>; // expected-error {{not supported}}
- using Abde = A<int B::*, bde>; // expected-error {{not supported}}
- static_assert(!is_same<Ab, Abce>, ""); // expected-error {{undeclared}} expected-error {{must be a type}}
- static_assert(!is_same<Ab, Abde>, ""); // expected-error {{undeclared}} expected-error {{must be a type}}
- static_assert(!is_same<Abce, Abde>, ""); // expected-error 2{{undeclared}} expected-error {{must be a type}}
- static_assert(is_same<Abce, A<int B::*, (int B::*)(int C::*)&E::e>>, ""); // expected-error {{undeclared}} expected-error {{not supported}}
+ using Abce = A<int B::*, bce>;
+ using Abde = A<int B::*, bde>;
+ static_assert(!is_same<Ab, Abce>, "");
+ static_assert(!is_same<Ab, Abde>, "");
+ static_assert(!is_same<Abce, Abde>, "");
+ static_assert(is_same<Abce, A<int B::*, (int B::*)(int C::*)&E::e>>, "");
using Ae = A<int E::*, e>;
using Ae = A<int E::*, &E::e>;
- using Aecb = A<int E::*, ecb>; // expected-error {{not supported}}
- using Aedb = A<int E::*, edb>; // expected-error {{not supported}}
- static_assert(!is_same<Ae, Aecb>, ""); // expected-error {{undeclared}} expected-error {{must be a type}}
- static_assert(!is_same<Ae, Aedb>, ""); // expected-error {{undeclared}} expected-error {{must be a type}}
- static_assert(!is_same<Aecb, Aedb>, ""); // expected-error 2{{undeclared}} expected-error {{must be a type}}
- static_assert(is_same<Aecb, A<int E::*, (int E::*)(int C::*)&B::b>>, ""); // expected-error {{undeclared}} expected-error {{not supported}}
+ using Aecb = A<int E::*, ecb>;
+ using Aedb = A<int E::*, edb>;
+ static_assert(!is_same<Ae, Aecb>, "");
+ static_assert(!is_same<Ae, Aedb>, "");
+ static_assert(!is_same<Aecb, Aedb>, "");
+ static_assert(is_same<Aecb, A<int E::*, (int E::*)(int C::*)&B::b>>, "");
using An = A<int E::*, nullptr>;
using A0 = A<int E::*, (int E::*)0>;
@@ -205,9 +203,9 @@ namespace Auto {
struct Y : X {};
void type_affects_identity(B<&X::n>) {}
- void type_affects_identity(B<(int Y::*)&X::n>) {} // FIXME: expected-error {{non-type template argument of pointer-to-member type}}
+ void type_affects_identity(B<(int Y::*)&X::n>) {}
void type_affects_identity(B<(const int X::*)&X::n>) {}
- void type_affects_identity(B<(const int Y::*)&X::n>) {} // FIXME: expected-error {{non-type template argument of pointer-to-member type}}
+ void type_affects_identity(B<(const int Y::*)&X::n>) {}
// A case where we need to do auto-deduction, and check whether the
// resulting dependent types match during partial ordering. These
diff --git a/clang/test/SemaTemplate/temp_arg_nontype_cxx20.cpp b/clang/test/SemaTemplate/temp_arg_nontype_cxx20.cpp
index e345a1f64b921a..b5b8cadc909ce0 100644
--- a/clang/test/SemaTemplate/temp_arg_nontype_cxx20.cpp
+++ b/clang/test/SemaTemplate/temp_arg_nontype_cxx20.cpp
@@ -8,8 +8,8 @@ namespace std {
// floating-point arguments
template<float> struct Float {};
-using F1 = Float<1.0f>; // FIXME expected-error {{non-type template argument of type}}
-using F1 = Float<2.0f / 2>; // FIXME expected-error {{non-type template argument of type}}
+using F1 = Float<1.0f>;
+using F1 = Float<2.0f / 2>;
struct S { int n[3]; } s; // expected-note 1+{{here}}
union U { int a, b; } u;
@@ -17,24 +17,28 @@ int n; // expected-note 1+{{here}}
// pointers to subobjects
template<int *> struct IntPtr {};
-using IPn = IntPtr<&n + 1>; // FIXME expected-error {{refers to subobject}}
-using IPn = IntPtr<&n + 1>; // FIXME expected-error {{refers to subobject}}
+using IPn = IntPtr<&n + 1>;
+using IPn = IntPtr<&n + 1>;
-using IP2 = IntPtr<&s.n[2]>; // FIXME expected-error {{refers to subobject}}
-using IP2 = IntPtr<s.n + 2>; // FIXME expected-error {{refers to subobject}}
+using IPn2 = IntPtr<&n + 2>; // expected-error {{not a constant expression}} expected-note {{cannot refer to element 2 of non-array object}}
-using IP3 = IntPtr<&s.n[3]>; // FIXME expected-error {{refers to subobject}}
-using IP3 = IntPtr<s.n + 3>; // FIXME expected-error {{refers to subobject}}
+using IP2 = IntPtr<&s.n[2]>;
+using IP2 = IntPtr<s.n + 2>;
+
+using IP3 = IntPtr<&s.n[3]>;
+using IP3 = IntPtr<s.n + 3>;
+
+using IP5 = IntPtr<&s.n[5]>; // expected-error {{not a constant expression}} expected-note {{cannot refer to element 5 of array of 3 elements}}
template<int &> struct IntRef {};
-using IPn = IntRef<*(&n + 1)>; // expected-error {{not a constant expression}} expected-note {{dereferenced pointer past the end of 'n'}}
-using IPn = IntRef<*(&n + 1)>; // expected-error {{not a constant expression}} expected-note {{dereferenced pointer past the end of 'n'}}
+using IRn = IntRef<*(&n + 1)>; // expected-error {{not a constant expression}} expected-note {{dereferenced pointer past the end of 'n'}}
+using IRn = IntRef<*(&n + 1)>; // expected-error {{not a constant expression}} expected-note {{dereferenced pointer past the end of 'n'}}
-using IP2 = IntRef<s.n[2]>; // FIXME expected-error {{refers to subobject}}
-using IP2 = IntRef<*(s.n + 2)>; // FIXME expected-error {{refers to subobject}}
+using IR2 = IntRef<s.n[2]>;
+using IR2 = IntRef<*(s.n + 2)>;
-using IP3 = IntRef<s.n[3]>; // expected-error {{not a constant expression}} expected-note {{dereferenced pointer past the end of subobject of 's'}}
-using IP3 = IntRef<*(s.n + 3)>; // expected-error {{not a constant expression}} expected-note {{dereferenced pointer past the end of subobject of 's'}}
+using IR3 = IntRef<s.n[3]>; // expected-error {{not a constant expression}} expected-note {{dereferenced pointer past the end of subobject of 's'}}
+using IR3 = IntRef<*(s.n + 3)>; // expected-error {{not a constant expression}} expected-note {{dereferenced pointer past the end of subobject of 's'}}
// classes
template<S> struct Struct {};
@@ -48,12 +52,12 @@ using U1 = Union<U{.b = 1}>; // expected-error {{
diff erent types}}
// miscellaneous scalar types
template<_Complex int> struct ComplexInt {};
-using CI = ComplexInt<1 + 3i>; // FIXME: expected-error {{non-type template argument of type}}
-using CI = ComplexInt<1 + 3i>; // FIXME: expected-error {{non-type template argument of type}}
+using CI = ComplexInt<1 + 3i>;
+using CI = ComplexInt<3i + 1>;
template<_Complex float> struct ComplexFloat {};
-using CF = ComplexFloat<1.0f + 3.0fi>; // FIXME: expected-error {{non-type template argument of type}}
-using CF = ComplexFloat<1.0f + 3.0fi>; // FIXME: expected-error {{non-type template argument of type}}
+using CF = ComplexFloat<1.0f + 3.0fi>;
+using CF = ComplexFloat<3.0fi + 1.0f>;
namespace ClassNTTP {
struct A { // expected-note 2{{candidate}}
diff --git a/clang/tools/libclang/CIndex.cpp b/clang/tools/libclang/CIndex.cpp
index 00c0dff9cce4c4..b03ad6054b9acf 100644
--- a/clang/tools/libclang/CIndex.cpp
+++ b/clang/tools/libclang/CIndex.cpp
@@ -1582,6 +1582,11 @@ bool CursorVisitor::VisitTemplateArgumentLoc(const TemplateArgumentLoc &TAL) {
return Visit(MakeCXCursor(E, StmtParent, TU, RegionOfInterest));
return false;
+ case TemplateArgument::StructuralValue:
+ if (Expr *E = TAL.getSourceStructuralValueExpression())
+ return Visit(MakeCXCursor(E, StmtParent, TU, RegionOfInterest));
+ return false;
+
case TemplateArgument::NullPtr:
if (Expr *E = TAL.getSourceNullPtrExpression())
return Visit(MakeCXCursor(E, StmtParent, TU, RegionOfInterest));
diff --git a/clang/tools/libclang/CXCursor.cpp b/clang/tools/libclang/CXCursor.cpp
index fd03c48ba1a42a..978adac5521aaa 100644
--- a/clang/tools/libclang/CXCursor.cpp
+++ b/clang/tools/libclang/CXCursor.cpp
@@ -1466,6 +1466,9 @@ enum CXTemplateArgumentKind clang_Cursor_getTemplateArgumentKind(CXCursor C,
return CXTemplateArgumentKind_NullPtr;
case TemplateArgument::Integral:
return CXTemplateArgumentKind_Integral;
+ case TemplateArgument::StructuralValue:
+ // FIXME: Expose these values.
+ return CXTemplateArgumentKind_Invalid;
case TemplateArgument::Template:
return CXTemplateArgumentKind_Template;
case TemplateArgument::TemplateExpansion:
diff --git a/clang/www/cxx_status.html b/clang/www/cxx_status.html
index 197726f3aa3eee..a48f35eb504837 100755
--- a/clang/www/cxx_status.html
+++ b/clang/www/cxx_status.html
@@ -637,13 +637,21 @@ <h2 id="cxx20">C++20 implementation status</h2>
</tr>
<!-- Rapperswil papers -->
<tr>
- <td rowspan="2">Class types as non-type template parameters</td>
+ <td>Class types as non-type template parameters</td>
<td><a href="https://wg21.link/p0732r2">P0732R2</a></td>
- <td rowspan="2" class="partial" align="center">Partial</td>
+ <td class="full" align="center">Clang 12</td>
+ </tr>
+ <tr> <!-- from Belfast -->
+ <td>Generalized non-type template parameters of scalar type</td>
+ <td><a href="https://wg21.link/p1907r1">P1907R1</a></td>
+ <td class="partial" align="center">
+ <details>
+ <summary>Clang 18 (Partial)</summary>
+ Reference type template arguments referring to instantiation-dependent objects and subobjects
+ (i.e. declared inside a template but neither type- nor value-dependent) aren't fully supported.
+ </details>
+ </td>
</tr>
- <tr> <!-- from Belfast -->
- <td><a href="https://wg21.link/p1907r1">P1907R1</a></td>
- </tr>
<tr>
<td>Destroying operator delete</td>
<td><a href="https://wg21.link/p0722r3">P0722R3</a></td>
diff --git a/lldb/include/lldb/lldb-enumerations.h b/lldb/include/lldb/lldb-enumerations.h
index ed1dec85d48406..392d333c23a447 100644
--- a/lldb/include/lldb/lldb-enumerations.h
+++ b/lldb/include/lldb/lldb-enumerations.h
@@ -875,6 +875,7 @@ enum TemplateArgumentKind {
eTemplateArgumentKindExpression,
eTemplateArgumentKindPack,
eTemplateArgumentKindNullPtr,
+ eTemplateArgumentKindStructuralValue,
};
/// Type of match to be performed when looking for a formatter for a data type.
diff --git a/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp b/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp
index ba37afbb619fb7..6f5ff105477be1 100644
--- a/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp
+++ b/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp
@@ -7168,6 +7168,9 @@ TypeSystemClang::GetTemplateArgumentKind(lldb::opaque_compiler_type_t type,
case clang::TemplateArgument::Pack:
return eTemplateArgumentKindPack;
+
+ case clang::TemplateArgument::StructuralValue:
+ return eTemplateArgumentKindStructuralValue;
}
llvm_unreachable("Unhandled clang::TemplateArgument::ArgKind");
}
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