Automatic Reference Counting.
Language-design credit goes to a lot of people, but I particularly want
to single out Blaine Garst and Patrick Beard for their contributions.
Compiler implementation credit goes to Argyrios, Doug, Fariborz, and myself,
in no particular order.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133103 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/ItaniumCXXABI.cpp b/lib/CodeGen/ItaniumCXXABI.cpp
index 12ef9bd..7e71df1 100644
--- a/lib/CodeGen/ItaniumCXXABI.cpp
+++ b/lib/CodeGen/ItaniumCXXABI.cpp
@@ -802,10 +802,27 @@
if (expr->doesUsualArrayDeleteWantSize())
return true;
+ // Automatic Reference Counting:
+ // We need an array cookie for pointers with strong or weak lifetime.
+ QualType AllocatedType = expr->getAllocatedType();
+ if (getContext().getLangOptions().ObjCAutoRefCount &&
+ AllocatedType->isObjCLifetimeType()) {
+ switch (AllocatedType.getObjCLifetime()) {
+ case Qualifiers::OCL_None:
+ case Qualifiers::OCL_ExplicitNone:
+ case Qualifiers::OCL_Autoreleasing:
+ return false;
+
+ case Qualifiers::OCL_Strong:
+ case Qualifiers::OCL_Weak:
+ return true;
+ }
+ }
+
// Otherwise, if the class has a non-trivial destructor, it always
// needs a cookie.
const CXXRecordDecl *record =
- expr->getAllocatedType()->getBaseElementTypeUnsafe()->getAsCXXRecordDecl();
+ AllocatedType->getBaseElementTypeUnsafe()->getAsCXXRecordDecl();
return (record && !record->hasTrivialDestructor());
}
@@ -816,6 +833,22 @@
if (expr->doesUsualArrayDeleteWantSize())
return true;
+ // Automatic Reference Counting:
+ // We need an array cookie for pointers with strong or weak lifetime.
+ if (getContext().getLangOptions().ObjCAutoRefCount &&
+ elementType->isObjCLifetimeType()) {
+ switch (elementType.getObjCLifetime()) {
+ case Qualifiers::OCL_None:
+ case Qualifiers::OCL_ExplicitNone:
+ case Qualifiers::OCL_Autoreleasing:
+ return false;
+
+ case Qualifiers::OCL_Strong:
+ case Qualifiers::OCL_Weak:
+ return true;
+ }
+ }
+
// Otherwise, if the class has a non-trivial destructor, it always
// needs a cookie.
const CXXRecordDecl *record =