Handle corner case where clang-cc is invoked directly to compile preprocessed source file without -main-file-name. In this case, CDDebugInfo is not able identify correct main source file becase SM.isFromMainFile() returns true for locations from header files as well as locations from main source file.
This patch takes conservative approach by not emitting more then one compile unit with isMain bit set.

llvm-svn: 69902

llvm-svn: 69873

llvm-svn: 69387

(This is not yet used.)

llvm-svn: 65573

using MachineModuleInfo.  This runs at about the same speed as the old
code, but fixes a bunch of bugs and is simpler and shorter.

llvm-svn: 58971

llvm-svn: 58892

llvm-svn: 58602

 - No functionality change.

llvm-svn: 58546

recursive types.
 - Style will be clean up in further patches.

llvm-svn: 58490

 - No functionality change.

llvm-svn: 58488

FileIDs. This seems better conceptually and lets the SourceManager
handle details of mapping the location to a file ID.
 - In practice, fixes an assert because this code wasn't using
   getPhysicalLoc.

llvm-svn: 58055

for Obj-C methods.

llvm-svn: 57769

simplifies clients.

Also, add assert that RegionStack is empty when the CGDebugInfo is
destroyed.

llvm-svn: 57684

llvm-svn: 54642

llvm-svn: 54548

llvm-svn: 52140

llvm-svn: 52070

llvm-svn: 51993

llvm-svn: 51765

emit incomplete types, because they crash llc, and always use the 
logical location as the current location so we don't crash doing invalid 
queries on CurLoc.

llvm-svn: 51675

Also take care of freeing memory at the right places.

llvm-svn: 51553

actually work (instead of crashing llc), and there's enough info emitted 
to get line number information in gdb. This should hopefully be helpful 
for debugging non-working programs.

I got rid of the begin/endregion calls because the implementation wasn't 
working; someone who knows the debugging info a bit better might try to 
add it. I really have no clue how a compiler is supposed to emit them.

This commit shouldn't have any effect without -g.

llvm-svn: 51404

Added -g command line options to clang for generating source level debug information. This patch currently enables generation of line number debug information (stoppoints) and region begin/end debug information. The new files CGDebugInfo.h and CGDebugInfo.cpp implements the debug info manager class CGDebugInfo.

llvm-svn: 50848