[ObjC++] Never pass structs that transitively contain __weak fields in
registers.
This patch fixes a bug in r328731 that caused structs transitively
containing __weak fields to be passed in registers. The patch replaces
the flag RecordDecl::CanPassInRegisters with a 2-bit enum that indicates
whether the struct or structs containing the struct are forced to be
passed indirectly.
This reapplies r329617. r329617 didn't specify the underlying type for
enum ArgPassingKind, which caused regression tests to fail on a windows
bot.
rdar://problem/39194693
Differential Revision: https://reviews.llvm.org/D45384
llvm-svn: 329635
diff --git a/clang/lib/Serialization/ASTWriter.cpp b/clang/lib/Serialization/ASTWriter.cpp
index 3369a54..7f1199f 100644
--- a/clang/lib/Serialization/ASTWriter.cpp
+++ b/clang/lib/Serialization/ASTWriter.cpp
@@ -5193,8 +5193,8 @@
case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
auto *RD = cast<CXXRecordDecl>(D);
UpdatedDeclContexts.insert(RD->getPrimaryContext());
- Record.push_back(RD->canPassInRegisters());
Record.push_back(RD->isParamDestroyedInCallee());
+ Record.push_back(RD->getArgPassingRestrictions());
Record.AddCXXDefinitionData(RD);
Record.AddOffset(WriteDeclContextLexicalBlock(
*Context, const_cast<CXXRecordDecl *>(RD)));