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-rw-r--r--clang/docs/ReleaseNotes.rst2
-rw-r--r--clang/lib/AST/ExprConstant.cpp9
-rw-r--r--clang/lib/CodeGen/CGExpr.cpp17
-rw-r--r--clang/lib/Sema/SemaChecking.cpp5
-rw-r--r--clang/lib/Sema/SemaOverload.cpp44
-rw-r--r--clang/test/AST/ast-dump-static-operators.cpp55
-rw-r--r--clang/test/CodeGenCXX/cxx2b-static-call-operator.cpp26
-rw-r--r--clang/test/CodeGenCXX/cxx2b-static-subscript-operator.cpp11
-rw-r--r--clang/test/SemaCXX/cxx2b-static-operator.cpp31
9 files changed, 158 insertions, 42 deletions
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 107bdcf..3722749 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -178,6 +178,8 @@ Bug Fixes to C++ Support
- Fix for crash when using a erroneous type in a return statement.
Fixes (`#63244 <https://github.com/llvm/llvm-project/issues/63244>`_)
and (`#79745 <https://github.com/llvm/llvm-project/issues/79745>`_)
+- Fix incorrect code generation caused by the object argument of ``static operator()`` and ``static operator[]`` calls not being evaluated.
+ Fixes (`#67976 <https://github.com/llvm/llvm-project/issues/67976>`_)
Bug Fixes to AST Handling
^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index a41bdac..6345389 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -7951,7 +7951,8 @@ public:
// Overloaded operator calls to member functions are represented as normal
// calls with '*this' as the first argument.
const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD);
- if (MD && MD->isImplicitObjectMemberFunction()) {
+ if (MD &&
+ (MD->isImplicitObjectMemberFunction() || (OCE && MD->isStatic()))) {
// FIXME: When selecting an implicit conversion for an overloaded
// operator delete, we sometimes try to evaluate calls to conversion
// operators without a 'this' parameter!
@@ -7960,7 +7961,11 @@ public:
if (!EvaluateObjectArgument(Info, Args[0], ThisVal))
return false;
- This = &ThisVal;
+
+ // If we are calling a static operator, the 'this' argument needs to be
+ // ignored after being evaluated.
+ if (MD->isInstance())
+ This = &ThisVal;
// If this is syntactically a simple assignment using a trivial
// assignment operator, start the lifetimes of union members as needed,
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 8c8c937..4a2f3ca 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -5848,6 +5848,7 @@ RValue CodeGenFunction::EmitCall(QualType CalleeType, const CGCallee &OrigCallee
// destruction order is not necessarily reverse construction order.
// FIXME: Revisit this based on C++ committee response to unimplementability.
EvaluationOrder Order = EvaluationOrder::Default;
+ bool StaticOperator = false;
if (auto *OCE = dyn_cast<CXXOperatorCallExpr>(E)) {
if (OCE->isAssignmentOp())
Order = EvaluationOrder::ForceRightToLeft;
@@ -5865,10 +5866,22 @@ RValue CodeGenFunction::EmitCall(QualType CalleeType, const CGCallee &OrigCallee
break;
}
}
+
+ if (const auto *MD =
+ dyn_cast_if_present<CXXMethodDecl>(OCE->getCalleeDecl());
+ MD && MD->isStatic())
+ StaticOperator = true;
}
- EmitCallArgs(Args, dyn_cast<FunctionProtoType>(FnType), E->arguments(),
- E->getDirectCallee(), /*ParamsToSkip*/ 0, Order);
+ auto Arguments = E->arguments();
+ if (StaticOperator) {
+ // If we're calling a static operator, we need to emit the object argument
+ // and ignore it.
+ EmitIgnoredExpr(E->getArg(0));
+ Arguments = drop_begin(Arguments, 1);
+ }
+ EmitCallArgs(Args, dyn_cast<FunctionProtoType>(FnType), Arguments,
+ E->getDirectCallee(), /*ParamsToSkip=*/0, Order);
const CGFunctionInfo &FnInfo = CGM.getTypes().arrangeFreeFunctionCall(
Args, FnType, /*ChainCall=*/Chain);
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index 502b24b..fc91f5d 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -7611,9 +7611,8 @@ bool Sema::CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall,
unsigned NumArgs = TheCall->getNumArgs();
Expr *ImplicitThis = nullptr;
- if (IsMemberOperatorCall && !FDecl->isStatic() &&
- !FDecl->hasCXXExplicitFunctionObjectParameter()) {
- // If this is a call to a non-static member operator, hide the first
+ if (IsMemberOperatorCall && !FDecl->hasCXXExplicitFunctionObjectParameter()) {
+ // If this is a call to a member operator, hide the first
// argument from checkCall.
// FIXME: Our choice of AST representation here is less than ideal.
ImplicitThis = Args[0];
diff --git a/clang/lib/Sema/SemaOverload.cpp b/clang/lib/Sema/SemaOverload.cpp
index c9eb678..940bccc 100644
--- a/clang/lib/Sema/SemaOverload.cpp
+++ b/clang/lib/Sema/SemaOverload.cpp
@@ -5664,10 +5664,15 @@ static ImplicitConversionSequence TryObjectArgumentInitialization(
assert(FromType->isRecordType());
QualType ClassType = S.Context.getTypeDeclType(ActingContext);
- // [class.dtor]p2: A destructor can be invoked for a const, volatile or
- // const volatile object.
+ // C++98 [class.dtor]p2:
+ // A destructor can be invoked for a const, volatile or const volatile
+ // object.
+ // C++98 [over.match.funcs]p4:
+ // For static member functions, the implicit object parameter is considered
+ // to match any object (since if the function is selected, the object is
+ // discarded).
Qualifiers Quals = Method->getMethodQualifiers();
- if (isa<CXXDestructorDecl>(Method)) {
+ if (isa<CXXDestructorDecl>(Method) || Method->isStatic()) {
Quals.addConst();
Quals.addVolatile();
}
@@ -15061,7 +15066,7 @@ ExprResult Sema::CreateOverloadedArraySubscriptExpr(SourceLocation LLoc,
CXXMethodDecl *Method = cast<CXXMethodDecl>(FnDecl);
SmallVector<Expr *, 2> MethodArgs;
- // Handle 'this' parameter if the selected function is not static.
+ // Initialize the object parameter.
if (Method->isExplicitObjectMemberFunction()) {
ExprResult Res =
InitializeExplicitObjectArgument(*this, Args[0], Method);
@@ -15069,7 +15074,7 @@ ExprResult Sema::CreateOverloadedArraySubscriptExpr(SourceLocation LLoc,
return ExprError();
Args[0] = Res.get();
ArgExpr = Args;
- } else if (Method->isInstance()) {
+ } else {
ExprResult Arg0 = PerformImplicitObjectArgumentInitialization(
Args[0], /*Qualifier=*/nullptr, Best->FoundDecl, Method);
if (Arg0.isInvalid())
@@ -15097,15 +15102,9 @@ ExprResult Sema::CreateOverloadedArraySubscriptExpr(SourceLocation LLoc,
ExprValueKind VK = Expr::getValueKindForType(ResultTy);
ResultTy = ResultTy.getNonLValueExprType(Context);
- CallExpr *TheCall;
- if (Method->isInstance())
- TheCall = CXXOperatorCallExpr::Create(
- Context, OO_Subscript, FnExpr.get(), MethodArgs, ResultTy, VK,
- RLoc, CurFPFeatureOverrides());
- else
- TheCall =
- CallExpr::Create(Context, FnExpr.get(), MethodArgs, ResultTy, VK,
- RLoc, CurFPFeatureOverrides());
+ CallExpr *TheCall = CXXOperatorCallExpr::Create(
+ Context, OO_Subscript, FnExpr.get(), MethodArgs, ResultTy, VK, RLoc,
+ CurFPFeatureOverrides());
if (CheckCallReturnType(FnDecl->getReturnType(), LLoc, TheCall, FnDecl))
return ExprError();
@@ -15733,15 +15732,13 @@ Sema::BuildCallToObjectOfClassType(Scope *S, Expr *Obj,
bool IsError = false;
- // Initialize the implicit object parameter if needed.
- // Since C++23, this could also be a call to a static call operator
- // which we emit as a regular CallExpr.
+ // Initialize the object parameter.
llvm::SmallVector<Expr *, 8> NewArgs;
if (Method->isExplicitObjectMemberFunction()) {
// FIXME: we should do that during the definition of the lambda when we can.
DiagnoseInvalidExplicitObjectParameterInLambda(Method);
PrepareExplicitObjectArgument(*this, Method, Obj, Args, NewArgs);
- } else if (Method->isInstance()) {
+ } else {
ExprResult ObjRes = PerformImplicitObjectArgumentInitialization(
Object.get(), /*Qualifier=*/nullptr, Best->FoundDecl, Method);
if (ObjRes.isInvalid())
@@ -15775,14 +15772,9 @@ Sema::BuildCallToObjectOfClassType(Scope *S, Expr *Obj,
ExprValueKind VK = Expr::getValueKindForType(ResultTy);
ResultTy = ResultTy.getNonLValueExprType(Context);
- CallExpr *TheCall;
- if (Method->isInstance())
- TheCall = CXXOperatorCallExpr::Create(Context, OO_Call, NewFn.get(),
- MethodArgs, ResultTy, VK, RParenLoc,
- CurFPFeatureOverrides());
- else
- TheCall = CallExpr::Create(Context, NewFn.get(), MethodArgs, ResultTy, VK,
- RParenLoc, CurFPFeatureOverrides());
+ CallExpr *TheCall = CXXOperatorCallExpr::Create(
+ Context, OO_Call, NewFn.get(), MethodArgs, ResultTy, VK, RParenLoc,
+ CurFPFeatureOverrides());
if (CheckCallReturnType(Method->getReturnType(), LParenLoc, TheCall, Method))
return true;
diff --git a/clang/test/AST/ast-dump-static-operators.cpp b/clang/test/AST/ast-dump-static-operators.cpp
new file mode 100644
index 0000000..e8454bd
--- /dev/null
+++ b/clang/test/AST/ast-dump-static-operators.cpp
@@ -0,0 +1,55 @@
+// RUN: %clang_cc1 -std=c++23 %s -ast-dump -triple x86_64-unknown-unknown -o - | FileCheck -strict-whitespace %s
+
+struct Functor {
+ static int operator()(int x, int y) {
+ return x + y;
+ }
+ static int operator[](int x, int y) {
+ return x + y;
+ }
+};
+
+Functor& get_functor() {
+ static Functor functor;
+ return functor;
+}
+
+void call_static_operators() {
+ Functor functor;
+
+ int z1 = functor(1, 2);
+ // CHECK: CXXOperatorCallExpr {{.*}} 'int' '()'
+ // CHECK-NEXT: |-ImplicitCastExpr {{.*}} <col:19, col:24> 'int (*)(int, int)' <FunctionToPointerDecay>
+ // CHECK-NEXT: | `-DeclRefExpr {{.*}} <col:19, col:24> 'int (int, int)' lvalue CXXMethod {{.*}} 'operator()' 'int (int, int)'
+ // CHECK-NEXT: |-DeclRefExpr {{.*}} <col:12> 'Functor' lvalue Var {{.*}} 'functor' 'Functor'
+ // CHECK-NEXT: |-IntegerLiteral {{.*}} <col:20> 'int' 1
+ // CHECK-NEXT: `-IntegerLiteral {{.*}} <col:23> 'int' 2
+
+ int z2 = functor[1, 2];
+ // CHECK: CXXOperatorCallExpr {{.*}} 'int' '[]'
+ // CHECK-NEXT: |-ImplicitCastExpr {{.*}} <col:19, col:24> 'int (*)(int, int)' <FunctionToPointerDecay>
+ // CHECK-NEXT: | `-DeclRefExpr {{.*}} <col:19, col:24> 'int (int, int)' lvalue CXXMethod {{.*}} 'operator[]' 'int (int, int)'
+ // CHECK-NEXT: |-DeclRefExpr {{.*}} <col:12> 'Functor' lvalue Var {{.*}} 'functor' 'Functor'
+ // CHECK-NEXT: |-IntegerLiteral {{.*}} <col:20> 'int' 1
+ // CHECK-NEXT: `-IntegerLiteral {{.*}} <col:23> 'int' 2
+
+ int z3 = get_functor()(1, 2);
+ // CHECK: CXXOperatorCallExpr {{.*}} 'int' '()'
+ // CHECK-NEXT: |-ImplicitCastExpr {{.*}} <col:25, col:30> 'int (*)(int, int)' <FunctionToPointerDecay>
+ // CHECK-NEXT: | `-DeclRefExpr {{.*}} <col:25, col:30> 'int (int, int)' lvalue CXXMethod {{.*}} 'operator()' 'int (int, int)'
+ // CHECK-NEXT: |-CallExpr {{.*}} <col:12, col:24> 'Functor' lvalue
+ // CHECK-NEXT: | `-ImplicitCastExpr {{.*}} <col:12> 'Functor &(*)()' <FunctionToPointerDecay>
+ // CHECK-NEXT: | `-DeclRefExpr {{.*}} <col:12> 'Functor &()' lvalue Function {{.*}} 'get_functor' 'Functor &()'
+ // CHECK-NEXT: |-IntegerLiteral {{.*}} <col:26> 'int' 1
+ // CHECK-NEXT: `-IntegerLiteral {{.*}} <col:29> 'int' 2
+
+ int z4 = get_functor()[1, 2];
+ // CHECK: CXXOperatorCallExpr {{.*}} 'int' '[]'
+ // CHECK-NEXT: |-ImplicitCastExpr {{.*}} <col:25, col:30> 'int (*)(int, int)' <FunctionToPointerDecay>
+ // CHECK-NEXT: | `-DeclRefExpr {{.*}} <col:25, col:30> 'int (int, int)' lvalue CXXMethod {{.*}} 'operator[]' 'int (int, int)'
+ // CHECK-NEXT: |-CallExpr {{.*}} <col:12, col:24> 'Functor' lvalue
+ // CHECK-NEXT: | `-ImplicitCastExpr {{.*}} <col:12> 'Functor &(*)()' <FunctionToPointerDecay>
+ // CHECK-NEXT: | `-DeclRefExpr {{.*}} <col:12> 'Functor &()' lvalue Function {{.*}} 'get_functor' 'Functor &()'
+ // CHECK-NEXT: |-IntegerLiteral {{.*}} <col:26> 'int' 1
+ // CHECK-NEXT: `-IntegerLiteral {{.*}} <col:29> 'int' 2
+}
diff --git a/clang/test/CodeGenCXX/cxx2b-static-call-operator.cpp b/clang/test/CodeGenCXX/cxx2b-static-call-operator.cpp
index fd53649..9cf5a7e 100644
--- a/clang/test/CodeGenCXX/cxx2b-static-call-operator.cpp
+++ b/clang/test/CodeGenCXX/cxx2b-static-call-operator.cpp
@@ -19,16 +19,22 @@ void CallsTheLambda() {
// CHECK: define {{.*}}CallsTheLambda{{.*}}
// CHECK-NEXT: entry:
-// CHECK-NEXT: %call = call noundef i32 {{.*}}(i32 noundef 1, i32 noundef 2)
+// CHECK: {{.*}}call {{.*}}GetALambda{{.*}}()
+// CHECK-NEXT: {{.*}} = call noundef i32 {{.*}}(i32 noundef 1, i32 noundef 2)
// CHECK-NEXT: ret void
// CHECK-NEXT: }
+Functor GetAFunctor() {
+ return {};
+}
+
void call_static_call_operator() {
Functor f;
f(101, 102);
f.operator()(201, 202);
Functor{}(301, 302);
Functor::operator()(401, 402);
+ GetAFunctor()(501, 502);
}
// CHECK: define {{.*}}call_static_call_operator{{.*}}
@@ -37,6 +43,8 @@ void call_static_call_operator() {
// CHECK-NEXT: {{.*}} = call noundef i32 {{.*}}Functor{{.*}}(i32 noundef 201, i32 noundef 202)
// CHECK-NEXT: {{.*}} = call noundef i32 {{.*}}Functor{{.*}}(i32 noundef 301, i32 noundef 302)
// CHECK-NEXT: {{.*}} = call noundef i32 {{.*}}Functor{{.*}}(i32 noundef 401, i32 noundef 402)
+// CHECK: {{.*}}call {{.*}}GetAFunctor{{.*}}()
+// CHECK-NEXT: {{.*}} = call noundef i32 {{.*}}Functor{{.*}}(i32 noundef 501, i32 noundef 502)
// CHECK-NEXT: ret void
// CHECK-NEXT: }
@@ -106,12 +114,16 @@ void test_dep_functors() {
// CHECK: define {{.*}}test_dep_functors{{.*}}
// CHECK-NEXT: entry:
-// CHECK: %call = call noundef i32 {{.*}}DepFunctor{{.*}}(float noundef 1.000000e+00)
-// CHECK: %call1 = call noundef i32 {{.*}}DepFunctor{{.*}}(i1 noundef zeroext true)
-// CHECK: %call2 = call noundef i32 {{.*}}dep_lambda1{{.*}}(float noundef 1.000000e+00)
-// CHECK: %call3 = call noundef i32 {{.*}}dep_lambda1{{.*}}(i1 noundef zeroext true)
-// CHECK: %call4 = call noundef i32 {{.*}}dep_lambda2{{.*}}(float noundef 1.000000e+00)
-// CHECK: %call5 = call noundef i32 {{.*}}dep_lambda2{{.*}}(i1 noundef zeroext true)
+// CHECK: {{.*}} = call noundef i32 {{.*}}DepFunctor{{.*}}(float noundef 1.000000e+00)
+// CHECK: {{.*}} = call noundef i32 {{.*}}DepFunctor{{.*}}(i1 noundef zeroext true)
+// CHECK: {{.*}}call {{.*}}dep_lambda1{{.*}}()
+// CHECK: {{.*}} = call noundef i32 {{.*}}dep_lambda1{{.*}}(float noundef 1.000000e+00)
+// CHECK: {{.*}}call {{.*}}dep_lambda1{{.*}}()
+// CHECK: {{.*}} = call noundef i32 {{.*}}dep_lambda1{{.*}}(i1 noundef zeroext true)
+// CHECK: {{.*}}call {{.*}}dep_lambda2{{.*}}()
+// CHECK: {{.*}} = call noundef i32 {{.*}}dep_lambda2{{.*}}(float noundef 1.000000e+00)
+// CHECK: {{.*}}call {{.*}}dep_lambda2{{.*}}()
+// CHECK: {{.*}} = call noundef i32 {{.*}}dep_lambda2{{.*}}(i1 noundef zeroext true)
// CHECK: ret void
// CHECK-NEXT: }
diff --git a/clang/test/CodeGenCXX/cxx2b-static-subscript-operator.cpp b/clang/test/CodeGenCXX/cxx2b-static-subscript-operator.cpp
index 5dbd2c5..5d82589 100644
--- a/clang/test/CodeGenCXX/cxx2b-static-subscript-operator.cpp
+++ b/clang/test/CodeGenCXX/cxx2b-static-subscript-operator.cpp
@@ -7,12 +7,17 @@ struct Functor {
}
};
+Functor GetAFunctor() {
+ return {};
+}
+
void call_static_subscript_operator() {
Functor f;
f[101, 102];
f.operator[](201, 202);
Functor{}[301, 302];
Functor::operator[](401, 402);
+ GetAFunctor()[501, 502];
}
// CHECK: define {{.*}}call_static_subscript_operator{{.*}}
@@ -21,6 +26,8 @@ void call_static_subscript_operator() {
// CHECK-NEXT: {{.*}} = call noundef i32 {{.*}}Functor{{.*}}(i32 noundef 201, i32 noundef 202)
// CHECK-NEXT: {{.*}} = call noundef i32 {{.*}}Functor{{.*}}(i32 noundef 301, i32 noundef 302)
// CHECK-NEXT: {{.*}} = call noundef i32 {{.*}}Functor{{.*}}(i32 noundef 401, i32 noundef 402)
+// CHECK: {{.*}}call {{.*}}GetAFunctor{{.*}}()
+// CHECK-NEXT: {{.*}} = call noundef i32 {{.*}}Functor{{.*}}(i32 noundef 501, i32 noundef 502)
// CHECK-NEXT: ret void
// CHECK-NEXT: }
@@ -60,7 +67,7 @@ void test_dep_functors() {
// CHECK: define {{.*}}test_dep_functors{{.*}}
// CHECK-NEXT: entry:
-// CHECK: %call = call noundef i32 {{.*}}DepFunctor{{.*}}(float noundef 1.000000e+00)
-// CHECK: %call1 = call noundef i32 {{.*}}DepFunctor{{.*}}(i1 noundef zeroext true)
+// CHECK: {{.*}} = call noundef i32 {{.*}}DepFunctor{{.*}}(float noundef 1.000000e+00)
+// CHECK: {{.*}} = call noundef i32 {{.*}}DepFunctor{{.*}}(i1 noundef zeroext true)
// CHECK: ret void
// CHECK-NEXT: }
diff --git a/clang/test/SemaCXX/cxx2b-static-operator.cpp b/clang/test/SemaCXX/cxx2b-static-operator.cpp
new file mode 100644
index 0000000..4d6f1f7
--- /dev/null
+++ b/clang/test/SemaCXX/cxx2b-static-operator.cpp
@@ -0,0 +1,31 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -std=c++23 %s
+
+// expected-no-diagnostics
+
+namespace A {
+
+struct Foo {
+ static int operator()(int a, int b) { return a + b; }
+ static int operator[](int a, int b) { return a + b; }
+};
+
+void ok() {
+ // Should pass regardless of const / volatile
+ Foo foo;
+ foo(1, 2);
+ foo[1, 2];
+
+ const Foo fooC;
+ fooC(1, 2);
+ fooC[1, 2];
+
+ const Foo fooV;
+ fooV(1, 2);
+ fooV[1, 2];
+
+ const volatile Foo fooCV;
+ fooCV(1, 2);
+ fooCV[1, 2];
+}
+
+}
generated by cgit v1.1 at 2024-09-07 12:10:17 +0000