Debug Info: Fix a problem that resulted in missing DW_AT_specifications
for C++ constructors.
If the DIType for a class was generated by
CGDebugInfo::createContextChain(), the cache contains only a
limited DIType wihtout any declarations. Since EmitFunctionStart()
needs to find the canonical declaration for each method, we
construct the complete type before emitting any method.
rdar://problem/
13116508
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181561
91177308-0d34-0410-b5e6-
96231b3b80d8