Fix #pragma GCC system_header by making it insert a virtual linemarker into
the file at the point of the pragma.  This allows clang to know that all
sourcelocations after the pragma are in a system header.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@73376 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed