This change fixed a SEH bug (exposed by test58 & test61 in MSVC test xcpt4u.c);
when an Except-filter is located inside a finally, the frame-pointer generated today via intrinsic @llvm.eh.recoverfp is the frame-pointer of the immediate parent _finally, not the frame-ptr of outermost host function.
The fix is to retrieve the Establisher's frame-pointer that was previously saved in parent's frame.
The prolog of a filter inside a _finally should be like:
%0 = call i8* @llvm.eh.recoverfp(i8* bitcast (@"?fin$0@0@main@@"), i8* %frame_pointer) %1 = call i8* @llvm.localrecover(i8* bitcast (@"?fin$0@0@main@@"), i8* %0, i32 0) %2 = bitcast i8* %1 to i8** %3 = load i8*, i8** %2, align 8