yaxunl added a comment.
Herald added a subscriber: jvesely.
In https://reviews.llvm.org/D43783#1204353, @svenvh wrote:
> Sorry for digging up an old commit...
>
> Apparently this broke block arguments, e.g. the following test case:
>
> int foo(int (^ bl)(void)) {
> return bl();
> }
>
> int get21() {
> return foo(^{return 21;});
> }
>
> int get42() {
> return foo(^{return 42;});
> }
>
>
> In particular, the VarDecl that `getBlockExpr()` sees doesn't have an
> initializer when the called block comes from an argument (causing clang to
> crash).
Sorry for the delay. I think block should not be allowed as function argument
since this generally leads indirect function calls therefore requires support
of function pointer. It will rely on optimizations to get rid of indirect
function calls.
Repository:
rC Clang
https://reviews.llvm.org/D43783
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