else
return getLVForDecl(cast<NamedDecl>(ContextDecl), computation);
}
-
if (const NamedDecl *ND = dyn_cast<NamedDecl>(DC))
return getLVForDecl(ND, computation);
-
return LinkageInfo::external();
}
LV.isVisibilityExplicit());
}
+static inline const CXXRecordDecl*
+getOutermostEnclosingLambda(const CXXRecordDecl *Record) {
+ const CXXRecordDecl *Ret = Record;
+ while (Record && Record->isLambda()) {
+ Ret = Record;
+ if (!Record->getParent()) break;
+ // Get the Containing Class of this Lambda Class
+ Record = dyn_cast_or_null<CXXRecordDecl>(
+ Record->getParent()->getParent());
+ }
+ return Ret;
+}
+
static LinkageInfo computeLVForDecl(const NamedDecl *D,
LVComputationKind computation) {
// Objective-C: treat all Objective-C declarations as having external
return LinkageInfo::internal();
}
- // This lambda has its linkage/visibility determined by its owner.
- return getLVForClosure(D->getDeclContext()->getRedeclContext(),
- Record->getLambdaContextDecl(), computation);
+ // This lambda has its linkage/visibility determined:
+ // - either by the outermost lambda if that lambda has no mangling
+ // number.
+ // - or by the parent of the outer most lambda
+ // This prevents infinite recursion in settings such as nested lambdas
+ // used in NSDMI's, for e.g.
+ // struct L {
+ // int t{};
+ // int t2 = ([](int a) { return [](int b) { return b; };})(t)(t);
+ // };
+ const CXXRecordDecl *OuterMostLambda =
+ getOutermostEnclosingLambda(Record);
+ if (!OuterMostLambda->getLambdaManglingNumber())
+ return LinkageInfo::internal();
+
+ return getLVForClosure(
+ OuterMostLambda->getDeclContext()->getRedeclContext(),
+ OuterMostLambda->getLambdaContextDecl(), computation);
}
break;
--- /dev/null
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10.0.0 -fblocks -emit-llvm -o - %s -fexceptions -std=c++11 | FileCheck %s
+
+// CHECK-LABEL: define void @_ZN19non_inline_function3fooEv()
+// CHECK-LABEL: define internal void @"_ZZN19non_inline_function3fooEvENK3$_0clEi"
+// CHECK-LABEL: define internal signext i8 @"_ZZZN19non_inline_function3fooEvENK3$_0clEiENKUlcE_clEc"
+namespace non_inline_function {
+void foo() {
+ auto L = [](int a) {
+ return [](char b) {
+ return b;
+ };
+ };
+ L(3)('a');
+}
+}
+// CHECK-LABEL: define linkonce_odr i32 @_ZN15inline_function3fooEv
+// CHECK-LABEL: define linkonce_odr void @_ZZN15inline_function3fooEvENKUliE_clEi
+// CHECK-LABEL: define linkonce_odr signext i8 @_ZZZN15inline_function3fooEvENKUliE_clEiENKUlcE_clEc
+namespace inline_function {
+inline int foo() {
+ auto L = [](int a) {
+ return [](char b) {
+ return b;
+ };
+ };
+ L(3)('a');
+}
+int use = foo();
+}
+
+// CHECK-LABEL: define linkonce_odr void @_ZN12non_template1LC1Ev
+// CHECK-LABEL: define linkonce_odr void @_ZNK12non_template1L1tMUliE_clEi(%class.anon
+// CHECK-LABEL: define linkonce_odr i32 @_ZZNK12non_template1L1tMUliE_clEiENKUliE_clEi(%class.anon
+namespace non_template {
+ struct L {
+ int t = ([](int a) { return [](int b) { return b; };})(2)(3);
+ };
+ L l;
+}
+
+// CHECK-LABEL: define linkonce_odr void @_ZN32lambdas_in_NSDMIs_template_class1LIiEC2Ev
+// CHECK-LABEL: define linkonce_odr void @_ZNK32lambdas_in_NSDMIs_template_class1LIiEUliE_clEi(%class.anon
+// CHECK-LABEL: linkonce_odr i32 @_ZZNK32lambdas_in_NSDMIs_template_class1LIiEUliE_clEiENKUliE_clEi(%class.anon
+namespace lambdas_in_NSDMIs_template_class {
+template<class T>
+struct L {
+ T t2 = ([](int a) { return [](int b) { return b; };})(T{})(T{});
+};
+L<int> l;
+}
+
+
+