I find the lldb cannot display structure type information, such as "print ArgLocs.size()" as follows,
-> 593 CCValAssign &VA = ArgLocs[i];
594 EVT ValVT = VA.getValVT();
595 ISD::ArgFlagsTy Flags = Ins[i].Flags;
596 bool IsRegLoc = VA.isRegLoc();
(lldb) print ArgLocs.size()
error: call to a function 'llvm::SmallVectorTemplateCommon<llvm::CCValAssign>::size() const' that is not present in the target
error: Couldn't materialize struct: Structure hasn't been laid out yet
I use Xcode 4.5.2 and my lldb can display structure type information on llvm 3.1.
gdb can display the structure type on llvm 3.2.
Jonathan