https://github.com/mpark updated
https://github.com/llvm/llvm-project/pull/121245
>From f8d317ce75e51e467487cb10a89e44b73e6b386a Mon Sep 17 00:00:00 2001
From: Michael Park <mcyp...@gmail.com>
Date: Tue, 28 Jan 2025 22:01:37 -0800
Subject: [PATCH 1/2] [C++20][Modules][Serialization] Add a unit test for
#121245.
---
clang/test/Modules/pr121245.cpp | 90 +++++++++++++++++++++++++++++++++
1 file changed, 90 insertions(+)
create mode 100644 clang/test/Modules/pr121245.cpp
diff --git a/clang/test/Modules/pr121245.cpp b/clang/test/Modules/pr121245.cpp
new file mode 100644
index 00000000000000..1ced5f286d3acc
--- /dev/null
+++ b/clang/test/Modules/pr121245.cpp
@@ -0,0 +1,90 @@
+// RUN: rm -rf %t
+// RUN: mkdir -p %t
+// RUN: split-file %s %t
+// RUN: cd %t
+
+// RUN: %clang_cc1 -std=c++20 -emit-header-unit -xc++-user-header %t/hu-01.h \
+// RUN: -fcxx-exceptions -o %t/hu-01.pcm
+
+// RUN: %clang_cc1 -std=c++20 -emit-header-unit -xc++-user-header %t/hu-02.h \
+// RUN: -Wno-experimental-header-units -fcxx-exceptions \
+// RUN: -fmodule-file=%t/hu-01.pcm -o %t/hu-02.pcm
+
+// RUN: %clang_cc1 -std=c++20 -emit-header-unit -xc++-user-header %t/hu-03.h \
+// RUN: -Wno-experimental-header-units -fcxx-exceptions \
+// RUN: -fmodule-file=%t/hu-01.pcm -o %t/hu-03.pcm
+
+// RUN: %clang_cc1 -std=c++20 -emit-header-unit -xc++-user-header %t/hu-04.h \
+// RUN: -Wno-experimental-header-units -fcxx-exceptions \
+// RUN: -fmodule-file=%t/hu-01.pcm -o %t/hu-04.pcm
+
+// RUN: %clang_cc1 -std=c++20 -emit-header-unit -xc++-user-header %t/hu-05.h \
+// RUN: -Wno-experimental-header-units -fcxx-exceptions \
+// RUN: -fmodule-file=%t/hu-03.pcm -fmodule-file=%t/hu-04.pcm \
+// RUN: -fmodule-file=%t/hu-01.pcm -o %t/hu-05.pcm
+
+// RUN: %clang_cc1 -std=c++20 -emit-obj %t/main.cpp \
+// RUN: -Wno-experimental-header-units -fcxx-exceptions \
+// RUN: -fmodule-file=%t/hu-02.pcm -fmodule-file=%t/hu-05.pcm \
+// RUN: -fmodule-file=%t/hu-04.pcm -fmodule-file=%t/hu-03.pcm \
+// RUN: -fmodule-file=%t/hu-01.pcm
+
+//--- hu-01.h
+template <typename T>
+struct A {
+ A() {}
+ ~A() {}
+};
+
+template <typename T>
+struct EBO : T {
+ EBO() = default;
+};
+
+template <typename T>
+struct HT : EBO<A<T>> {};
+
+//--- hu-02.h
+import "hu-01.h";
+
+inline void f() {
+ HT<int>();
+}
+
+//--- hu-03.h
+import "hu-01.h";
+
+struct C {
+ C();
+
+ HT<long> _;
+};
+
+//--- hu-04.h
+import "hu-01.h";
+
+void g(HT<long> = {});
+
+//--- hu-05.h
+import "hu-03.h";
+import "hu-04.h";
+import "hu-01.h";
+
+struct B {
+ virtual ~B() = default;
+
+ virtual void f() {
+ HT<long>();
+ }
+};
+
+//--- main.cpp
+import "hu-02.h";
+import "hu-05.h";
+import "hu-03.h";
+
+int main() {
+ f();
+ C();
+ B();
+}
>From e6c5d9a188880d18a632c99dc437225e66634c1a Mon Sep 17 00:00:00 2001
From: Michael Park <mcyp...@gmail.com>
Date: Fri, 27 Dec 2024 17:52:19 -0800
Subject: [PATCH 2/2] Delay marking pending incomplete decl chains until the
end of `finishPendingActions`.
---
clang/lib/Serialization/ASTReader.cpp | 26 +++++++++++++-------------
1 file changed, 13 insertions(+), 13 deletions(-)
diff --git a/clang/lib/Serialization/ASTReader.cpp
b/clang/lib/Serialization/ASTReader.cpp
index f524251c48ddd7..69e6703dbdeb1c 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -10186,12 +10186,12 @@ void ASTReader::visitTopLevelModuleMaps(
}
void ASTReader::finishPendingActions() {
- while (
- !PendingIdentifierInfos.empty() || !PendingDeducedFunctionTypes.empty()
||
- !PendingDeducedVarTypes.empty() || !PendingIncompleteDeclChains.empty()
||
- !PendingDeclChains.empty() || !PendingMacroIDs.empty() ||
- !PendingDeclContextInfos.empty() || !PendingUpdateRecords.empty() ||
- !PendingObjCExtensionIvarRedeclarations.empty()) {
+ while (!PendingIdentifierInfos.empty() ||
+ !PendingDeducedFunctionTypes.empty() ||
+ !PendingDeducedVarTypes.empty() || !PendingDeclChains.empty() ||
+ !PendingMacroIDs.empty() || !PendingDeclContextInfos.empty() ||
+ !PendingUpdateRecords.empty() ||
+ !PendingObjCExtensionIvarRedeclarations.empty()) {
// If any identifiers with corresponding top-level declarations have
// been loaded, load those declarations now.
using TopLevelDeclsMap =
@@ -10239,13 +10239,6 @@ void ASTReader::finishPendingActions() {
}
PendingDeducedVarTypes.clear();
- // For each decl chain that we wanted to complete while deserializing, mark
- // it as "still needs to be completed".
- for (unsigned I = 0; I != PendingIncompleteDeclChains.size(); ++I) {
- markIncompleteDeclChain(PendingIncompleteDeclChains[I]);
- }
- PendingIncompleteDeclChains.clear();
-
// Load pending declaration chains.
for (unsigned I = 0; I != PendingDeclChains.size(); ++I)
loadPendingDeclChain(PendingDeclChains[I].first,
@@ -10483,6 +10476,13 @@ void ASTReader::finishPendingActions() {
for (auto *ND : PendingMergedDefinitionsToDeduplicate)
getContext().deduplicateMergedDefinitonsFor(ND);
PendingMergedDefinitionsToDeduplicate.clear();
+
+ // For each decl chain that we wanted to complete while deserializing, mark
+ // it as "still needs to be completed".
+ for (unsigned I = 0; I != PendingIncompleteDeclChains.size(); ++I) {
+ markIncompleteDeclChain(PendingIncompleteDeclChains[I]);
+ }
+ PendingIncompleteDeclChains.clear();
}
void ASTReader::diagnoseOdrViolations() {
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