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Support generation of objc_assign_ivar for ivar 

write-barriers.

llvm-svn: 59748
This commit is contained in:
Fariborz Jahanian 2008-11-20 20:53:20 +00:00
parent 22e9677a5e
commit 75686a58f3
2 changed files with 19 additions and 3 deletions
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12
clang/lib/CodeGen/CGExpr.cpp
View File

@ -372,7 +372,10 @@ void CodeGenFunction::EmitStoreThroughLValue(RValue Src, LValue Dst,
// load of a __strong object.
llvm::Value *LvalueDst = Dst.getAddress();
llvm::Value *src = Src.getScalarVal();
CGM.getObjCRuntime().EmitObjCGlobalAssign(*this, src, LvalueDst);
if (Dst.isObjCIvar())
CGM.getObjCRuntime().EmitObjCIvarAssign(*this, src, LvalueDst);
else
CGM.getObjCRuntime().EmitObjCGlobalAssign(*this, src, LvalueDst);
return;
}
@ -523,7 +526,7 @@ void CodeGenFunction::EmitStoreThroughExtVectorComponentLValue(RValue Src,
/// SetVarDeclObjCAttribute - Set __weak/__strong attributes into the LValue
/// object.
static void SetVarDeclObjCAttribute(ASTContext &Ctx, const VarDecl *VD,
static void SetVarDeclObjCAttribute(ASTContext &Ctx, const Decl *VD,
const QualType &Ty, LValue &LV)
{
if (const ObjCGCAttr *A = VD->getAttr<ObjCGCAttr>()) {
@ -932,7 +935,10 @@ LValue CodeGenFunction::EmitLValueForIvar(llvm::Value *BaseValue,
unsigned Index = CGM.getTypes().getLLVMFieldNo(Ivar);
llvm::Value *V = Builder.CreateStructGEP(BaseValue, Index, "tmp");
return LValue::MakeAddr(V, Ivar->getType().getCVRQualifiers()|CVRQualifiers);
LValue LV = LValue::MakeAddr(V, Ivar->getType().getCVRQualifiers()|CVRQualifiers);
SetVarDeclObjCAttribute(getContext(), Ivar, Ivar->getType(), LV);
LValue::SetObjCIvar(LV);
return LV;
}
LValue CodeGenFunction::EmitObjCIvarRefLValue(const ObjCIvarRefExpr *E) {

10
clang/lib/CodeGen/CGValue.h
View File

@ -137,8 +137,12 @@ class LValue {
// FIXME: set but never used, what effect should it have?
bool Restrict:1;
// objective-c's ivar
bool Ivar:1;
// objective-c's gc attributes
unsigned ObjCType : 2;
private:
static void SetQualifiers(unsigned Qualifiers, LValue& R) {
@ -147,6 +151,7 @@ private:
// FIXME: Convenient place to set objc flags to 0. This
// should really be done in a user-defined constructor instead.
R.ObjCType = None;
R.Ivar = false;
}
public:
@ -159,9 +164,14 @@ public:
bool isVolatileQualified() const { return Volatile; }
bool isRestrictQualified() const { return Restrict; }
bool isObjCIvar() const { return Ivar; }
bool isObjCWeak() const { return ObjCType == Weak; }
bool isObjCStrong() const { return ObjCType == Strong; }
static void SetObjCIvar(LValue& R) {
R.Ivar = true;
}
static void SetObjCType(bool isWeak, bool isStrong, LValue& R) {
assert(!(isWeak == true && isStrong == true));
if (isWeak)