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| author | Erik Pilkington <erik.pilkington@gmail.com> | 2019-01-04 18:33:06 +0000 |
|---|---|---|
| committer | Erik Pilkington <erik.pilkington@gmail.com> | 2019-01-04 18:33:06 +0000 |
| commit | 6d306af57388db45495728891bccdad0156c2c28 (patch) | |
| tree | fc0ec49f75f6c86991b803f71aa97dd7e0634558 /lib/Serialization/ASTWriterDecl.cpp | |
| parent | 1188822bbcdd02f816e857f1c15df32d0d8c5336 (diff) | |
| download | clang-6d306af57388db45495728891bccdad0156c2c28.tar.gz | |
[ObjCARC] Add an new attribute, objc_externally_retained
This attribute, called "objc_externally_retained", exposes clang's
notion of pseudo-__strong variables in ARC. Pseudo-strong variables
"borrow" their initializer, meaning that they don't retain/release
it, instead assuming that someone else is keeping their value alive.
If a function is annotated with this attribute, implicitly strong
parameters of that function aren't implicitly retained/released in
the function body, and are implicitly const. This is useful to expose
for performance reasons, most functions don't need the extra safety
of the retain/release, so programmers can opt out as needed.
This attribute can also apply to declarations of local variables,
with similar effect.
Differential revision: https://reviews.llvm.org/D55865
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@350422 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Serialization/ASTWriterDecl.cpp')
| -rw-r--r-- | lib/Serialization/ASTWriterDecl.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/Serialization/ASTWriterDecl.cpp b/lib/Serialization/ASTWriterDecl.cpp index 5ec11dda8a..002b43f811 100644 --- a/lib/Serialization/ASTWriterDecl.cpp +++ b/lib/Serialization/ASTWriterDecl.cpp @@ -922,13 +922,13 @@ void ASTDeclWriter::VisitVarDecl(VarDecl *D) { Record.push_back(D->getStorageClass()); Record.push_back(D->getTSCSpec()); Record.push_back(D->getInitStyle()); + Record.push_back(D->isARCPseudoStrong()); if (!isa<ParmVarDecl>(D)) { Record.push_back(D->isThisDeclarationADemotedDefinition()); Record.push_back(D->isExceptionVariable()); Record.push_back(D->isNRVOVariable()); Record.push_back(D->isCXXForRangeDecl()); Record.push_back(D->isObjCForDecl()); - Record.push_back(D->isARCPseudoStrong()); Record.push_back(D->isInline()); Record.push_back(D->isInlineSpecified()); Record.push_back(D->isConstexpr()); @@ -1986,6 +1986,7 @@ void ASTWriter::WriteDeclAbbrevs() { Abv->Add(BitCodeAbbrevOp(0)); // SClass Abv->Add(BitCodeAbbrevOp(0)); // TSCSpec Abv->Add(BitCodeAbbrevOp(0)); // InitStyle + Abv->Add(BitCodeAbbrevOp(0)); // ARCPseudoStrong Abv->Add(BitCodeAbbrevOp(0)); // Linkage Abv->Add(BitCodeAbbrevOp(0)); // HasInit Abv->Add(BitCodeAbbrevOp(0)); // HasMemberSpecializationInfo @@ -2062,12 +2063,12 @@ void ASTWriter::WriteDeclAbbrevs() { Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); // SClass Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // TSCSpec Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // InitStyle + Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isARCPseudoStrong Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsThisDeclarationADemotedDefinition Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isExceptionVariable Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isNRVOVariable Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isCXXForRangeDecl Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isObjCForDecl - Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isARCPseudoStrong Abv->Add(BitCodeAbbrevOp(0)); // isInline Abv->Add(BitCodeAbbrevOp(0)); // isInlineSpecified Abv->Add(BitCodeAbbrevOp(0)); // isConstexpr |