Extend -remap-file=from;to to permit mapping from a non-existent

file. This is accomplished by introducing the notion of a "virtual"
file into the file manager, which provides a FileEntry* for a named
file whose size and modification time are known but which may not
exist on disk.

Added a cute little test that remaps both a .c file and a .h file it
includes to alternative files.

llvm-svn: 90329

1 files changed, 3 insertions, 0 deletions

diff --git a/clang/test/Misc/Inputs/remapped-file-2 b/clang/test/Misc/Inputs/remapped-file-2
new file mode 100644
index 00000000000..9ac034a3b97
--- /dev/null
+++ b/clang/test/Misc/Inputs/remapped-file-2
@@ -0,0 +1,3 @@
+#include "nonexistent.h"
+
+int *f() { return fp; }