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Emit errors about unsupported blocks features.

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llvm-svn: 65751
This commit is contained in:
Anders Carlsson
2009-03-01 01:45:25 +00:00
parent 25f282f566
commit 961763e35a
2 changed files with 75 additions and 0 deletions
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41
clang/lib/CodeGen/CGBlocks.cpp
View File

@@ -132,6 +132,44 @@ static bool CanBlockBeGlobal(const CodeGenFunction::BlockInfo &Info)
return Info.ByRefDeclRefs.empty() && Info.ByCopyDeclRefs.empty();
}
/// CanGenerateCodeForBlockExpr - Returns whether CodeGen for the block expr
/// is supported. Will emit a diagnostic and return false if not.
/// FIXME: Once we support everything this should of course be removed.
static bool CanGenerateCodeForBlockExpr(CodeGenFunction &CGF,
const BlockExpr* BE,
const CodeGenFunction::BlockInfo &Info)
{
if (!Info.ByRefDeclRefs.empty()) {
CGF.ErrorUnsupported(BE, "block expression with __block variables");
return false;
}
for (size_t I = 0, E = Info.ByCopyDeclRefs.size(); I != E; ++I) {
const BlockDeclRefExpr *E = Info.ByCopyDeclRefs[I];
E->getType()->dump();
if (E->getType()->isBlockPointerType()) {
CGF.ErrorUnsupported(BE, "block expression with imported block");
return false;
}
if (E->getDecl()->getAttr<ObjCNSObjectAttr>() ||
CGF.getContext().isObjCNSObjectType(E->getType())) {
CGF.ErrorUnsupported(BE, "block expression with __attribute__((NSObject))"
" variable");
return false;
}
if (CGF.getContext().isObjCObjectPointerType(E->getType())) {
CGF.ErrorUnsupported(BE, "block expression with Objective-C variable");
return false;
}
}
return true;
}
// FIXME: Push most into CGM, passing down a few bits, like current
// function name.
llvm::Value *CodeGenFunction::BuildBlockLiteralTmp(const BlockExpr *BE) {
@@ -144,6 +182,9 @@ llvm::Value *CodeGenFunction::BuildBlockLiteralTmp(const BlockExpr *BE) {
if (CanBlockBeGlobal(Info))
return CGM.GetAddrOfGlobalBlock(BE, Name.c_str());
if (!CanGenerateCodeForBlockExpr(*this, BE, Info))
return llvm::UndefValue::get(ConvertType(BE->getType()));
std::vector<llvm::Constant*> Elts;
llvm::Constant *C;
llvm::Value *V;

34
clang/test/CodeGenObjC/blocks-unsupported.m Normal file
View File

@@ -0,0 +1,34 @@
// RUN: clang -fnext-runtime --emit-llvm -o %t %s -verify
@class Foo;
@protocol P;
void t1()
{
__block int a;
^{ a = 10; }(); // expected-error {{cannot compile this block expression with __block variables yet}}
void (^block)(void);
^{ (void)block; }(); // expected-error {{}}
struct Foo *__attribute__ ((NSObject)) foo;
^{ (void)foo; }(); // expected-error {{cannot compile this block expression with __attribute__((NSObject)) variable yet}}
typedef struct CGColor * __attribute__ ((NSObject)) CGColorRef;
CGColorRef color;
^{ (void)color; }(); // expected-error {{cannot compile this block expression with __attribute__((NSObject)) variable yet}}
id a1;
^{ (void)a1; }(); // expected-error {{cannot compile this block expression with Objective-C variable yet}}
Foo *a2;
^{ (void)a2; }(); // expected-error {{cannot compile this block expression with Objective-C variable yet}}
id<P> a3;
^{ (void)a3; }(); // expected-error {{cannot compile this block expression with Objective-C variable yet}}
Foo<P> *a4;
^{ (void)a4; }(); // expected-error {{cannot compile this block expression with Objective-C variable yet}}
}