[PATCH] D153362: [clang][DebugInfo] Emit DW_AT_defaulted for defaulted C++ member functions
Michael Buch via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Tue Jun 20 08:50:37 PDT 2023
Michael137 updated this revision to Diff 532957.
Michael137 added a comment.
- clang-format
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D153362/new/
https://reviews.llvm.org/D153362
Files:
clang/lib/CodeGen/CGDebugInfo.cpp
clang/test/CodeGenCXX/debug-info-defaulted.cpp
Index: clang/test/CodeGenCXX/debug-info-defaulted.cpp
===================================================================
--- /dev/null
+++ clang/test/CodeGenCXX/debug-info-defaulted.cpp
@@ -0,0 +1,38 @@
+// Test for debug info for C++ defaulted member functions
+
+// RUN: %clang_cc1 -emit-llvm -triple x86_64-linux-gnu %s -o - \
+// RUN: -O0 -debug-info-kind=standalone -std=c++20 | FileCheck %s
+
+// CHECK: DISubprogram(name: "defaulted", {{.*}}, flags: DIFlagPrototyped, spFlags: DISPFlagDefaultedInClass)
+// CHECK: DISubprogram(name: "~defaulted", {{.*}}, flags: DIFlagPrototyped, spFlags: DISPFlagDefaultedOutOfClass)
+// CHECK: DISubprogram(name: "operator=", {{.*}}, flags: DIFlagPrototyped, spFlags: 0)
+// CHECK: DISubprogram(name: "operator=", {{.*}}, flags: DIFlagPrototyped, spFlags: 0)
+// CHECK: DISubprogram(name: "operator==", {{.*}}, flags: DIFlagPrototyped, spFlags: DISPFlagDefaultedInClass)
+// CHECK-NOT: DISubprogram(name: "implicit_defaulted"
+struct defaulted {
+ // inline defaulted
+ defaulted() = default;
+
+ // out-of-line defaulted (inline keyword
+ // shouldn't change that)
+ inline ~defaulted();
+
+ // These shouldn't produce a defaulted-ness DI flag
+ // (though technically they are DW_DEFAULTED_no)
+ defaulted& operator=(defaulted const&) { return *this; }
+ defaulted& operator=(defaulted &&);
+
+ bool operator==(defaulted const&) const = default;
+};
+
+defaulted::~defaulted() = default;
+defaulted& defaulted::operator=(defaulted &&) { return *this; }
+
+// All ctors/dtors are implicitly defatuled.
+// So no DW_AT_defaulted expected for these.
+struct implicit_defaulted {};
+
+void foo() {
+ defaulted d;
+ implicit_defaulted i;
+}
Index: clang/lib/CodeGen/CGDebugInfo.cpp
===================================================================
--- clang/lib/CodeGen/CGDebugInfo.cpp
+++ clang/lib/CodeGen/CGDebugInfo.cpp
@@ -1948,6 +1948,14 @@
if (Method->getCanonicalDecl()->isDeleted())
SPFlags |= llvm::DISubprogram::SPFlagDeleted;
+ // The defaulted-ness of an out-of-class method is a property of its
+ // definition. Hence, query the definition instead.
+ if (auto const *Def = Method->getDefinition())
+ if (Def->isExplicitlyDefaulted())
+ SPFlags |= (Def->isOutOfLine())
+ ? llvm::DISubprogram::SPFlagDefaultedOutOfClass
+ : llvm::DISubprogram::SPFlagDefaultedInClass;
+
if (Method->isNoReturn())
Flags |= llvm::DINode::FlagNoReturn;
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