sdesmalen created this revision.
sdesmalen added reviewers: aaron.ballman, sunfish.
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This requires forcibly toggling the 'willHaveBody' value of the Decl that's
being built up before/after handling the attributes in order to query
this property on the Decl.
This also updates a WASM test that seemed incorrect (the attribute is
only allowed on function declarations, not definitions).
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D128256
Files:
clang/include/clang/Basic/Attr.td
clang/lib/Sema/SemaDecl.cpp
clang/test/AST/ast-dump-wasm-attr-export.c
clang/test/Misc/pragma-attribute-supported-attributes-list.test
clang/test/Sema/aarch64-sme-func-attrs.c
Index: clang/test/Sema/aarch64-sme-func-attrs.c
===================================================================
--- clang/test/Sema/aarch64-sme-func-attrs.c
+++ clang/test/Sema/aarch64-sme-func-attrs.c
@@ -100,6 +100,10 @@
// expected-note@+1 {{conflicting attribute is here}}
__attribute__((arm_preserves_za, arm_new_za)) void preserves_new_za(void);
+// expected-cpp-error@+2 {{'arm_locally_streaming' attribute only applies to function definitions}}
+// expected-error@+1 {{'arm_locally_streaming' attribute only applies to function definitions}}
+__attribute__((arm_locally_streaming)) void sme_arm_locally_streaming_on_declaration(void);
+
// Invalid attributes on function pointers
// expected-cpp-error@+4 {{'arm_streaming_compatible' and 'arm_streaming' attributes are not compatible}}
@@ -138,8 +142,8 @@
typedef __attribute__((arm_new_za, arm_preserves_za)) void (*fptrty10) (void);
fptrty10 invalid_preserve_za_func() { return preserves_za_ptr_invalid; }
-// expected-cpp-error@+2 {{'arm_locally_streaming' attribute only applies to functions}}
-// expected-error@+1 {{'arm_locally_streaming' attribute only applies to functions}}
+// expected-cpp-error@+2 {{'arm_locally_streaming' attribute only applies to function definitions}}
+// expected-error@+1 {{'arm_locally_streaming' attribute only applies to function definitions}}
typedef __attribute__((arm_locally_streaming)) void (*fptrty11) (void);
// expected-warning@+2 {{'arm_streaming' attribute ignored}}
Index: clang/test/Misc/pragma-attribute-supported-attributes-list.test
===================================================================
--- clang/test/Misc/pragma-attribute-supported-attributes-list.test
+++ clang/test/Misc/pragma-attribute-supported-attributes-list.test
@@ -18,7 +18,6 @@
// CHECK-NEXT: AnyX86NoCfCheck (SubjectMatchRule_hasType_functionType)
// CHECK-NEXT: ArcWeakrefUnavailable (SubjectMatchRule_objc_interface)
// CHECK-NEXT: ArmBuiltinAlias (SubjectMatchRule_function)
-// CHECK-NEXT: ArmLocallyStreaming (SubjectMatchRule_function)
// CHECK-NEXT: AssumeAligned (SubjectMatchRule_objc_method, SubjectMatchRule_function)
// CHECK-NEXT: Assumption (SubjectMatchRule_function, SubjectMatchRule_objc_method)
// CHECK-NEXT: Availability ((SubjectMatchRule_record, SubjectMatchRule_enum, SubjectMatchRule_enum_constant, SubjectMatchRule_field, SubjectMatchRule_function, SubjectMatchRule_namespace, SubjectMatchRule_objc_category, SubjectMatchRule_objc_implementation, SubjectMatchRule_objc_interface, SubjectMatchRule_objc_method, SubjectMatchRule_objc_property, SubjectMatchRule_objc_protocol, SubjectMatchRule_record, SubjectMatchRule_type_alias, SubjectMatchRule_variable))
Index: clang/test/AST/ast-dump-wasm-attr-export.c
===================================================================
--- clang/test/AST/ast-dump-wasm-attr-export.c
+++ clang/test/AST/ast-dump-wasm-attr-export.c
@@ -10,24 +10,21 @@
// Test that functions can be redeclared and they retain their attributes.
-__attribute__((export_name("export_red"))) void red(void) {}
-__attribute__((export_name("export_orange"))) void orange(void) {}
-__attribute__((export_name("export_yellow"))) void yellow(void) {}
+__attribute__((export_name("export_red"))) void red(void);
+__attribute__((export_name("export_orange"))) void orange(void);
+__attribute__((export_name("export_yellow"))) void yellow(void);
void red(void);
void orange(void);
void yellow(void);
// CHECK: |-FunctionDecl {{.+}} used red 'void (void)'
-// CHECK: | |-CompoundStmt {{.+}}
// CHECK: | |-WebAssemblyExportNameAttr {{.+}} "export_red"
// CHECK: | `-UsedAttr {{.+}} Implicit
// CHECK: |-FunctionDecl {{.+}} used orange 'void (void)'
-// CHECK: | |-CompoundStmt {{.+}}
// CHECK: | |-WebAssemblyExportNameAttr {{.+}} "export_orange"
// CHECK: | `-UsedAttr {{.+}} Implicit
// CHECK: |-FunctionDecl {{.+}} used yellow 'void (void)'
-// CHECK: | |-CompoundStmt {{.+}}
// CHECK: | |-WebAssemblyExportNameAttr {{.+}} "export_yellow"
// CHECK: | `-UsedAttr {{.+}} Implicit
// CHECK: |-FunctionDecl {{.+}} used red 'void (void)'
Index: clang/lib/Sema/SemaDecl.cpp
===================================================================
--- clang/lib/Sema/SemaDecl.cpp
+++ clang/lib/Sema/SemaDecl.cpp
@@ -9826,8 +9826,18 @@
}
}
- // Handle attributes.
- ProcessDeclAttributes(S, NewFD, D);
+ // Because not all of the declaration may have been parsed at the point of
+ // calling this function, we forcably toggle 'WillHaveBody' if we're parsing
+ // a function definition so that the code handling the attributes can check
+ // whether the attribute is applied on the correct construct. We also reset
+ // the 'WillHaveBody' value, because other places in Clang assume this hasn't
+ // already been set.
+ if (D.isFunctionDefinition()) {
+ NewFD->setWillHaveBody();
+ ProcessDeclAttributes(S, NewFD, D);
+ NewFD->setWillHaveBody(false);
+ } else
+ ProcessDeclAttributes(S, NewFD, D);
if (getLangOpts().OpenCL) {
// OpenCL v1.1 s6.5: Using an address space qualifier in a function return
Index: clang/include/clang/Basic/Attr.td
===================================================================
--- clang/include/clang/Basic/Attr.td
+++ clang/include/clang/Basic/Attr.td
@@ -144,6 +144,9 @@
[{S->getFunctionType(false) != nullptr}],
"functions, function pointers">;
+def FunctionDef : SubsetSubject<Function, [{S->isThisDeclarationADefinition()}],
+ "function definitions">;
+
def OpenCLKernelFunction
: SubsetSubject<Function, [{S->hasAttr<OpenCLKernelAttr>()}],
"kernel functions">;
@@ -2344,7 +2347,7 @@
def ArmLocallyStreaming : DeclOrTypeAttr, TargetSpecificAttr<TargetAArch64SME> {
let Spellings = [Clang<"arm_locally_streaming">];
- let Subjects = SubjectList<[Function], ErrorDiag>;
+ let Subjects = SubjectList<[FunctionDef], ErrorDiag>;
let Documentation = [ArmSmeLocallyStreamingDocs];
}
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