Make DebugLoc independent of DwarfWriter.

-Replace DebugLocTuple's Source ID with CompileUnit's GlobalVariable*
-Remove DwarfWriter::getOrCreateSourceID
-Make necessary changes for the above (fix callsites, etc.)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70520 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/MachineFunction.cpp

@@ -398,9 +398,9 @@ unsigned MachineFunction::addLiveIn(unsigned PReg,
 /// getOrCreateDebugLocID - Look up the DebugLocTuple index with the given
 /// source file, line, and column. If none currently exists, create a new
 /// DebugLocTuple, and insert it into the DebugIdMap.
-unsigned MachineFunction::getOrCreateDebugLocID(unsigned Src, unsigned Line,
-                                                unsigned Col) {
-  DebugLocTuple Tuple(Src, Line, Col);
+unsigned MachineFunction::getOrCreateDebugLocID(GlobalVariable *CompileUnit,
+                                                unsigned Line, unsigned Col) {
+  DebugLocTuple Tuple(CompileUnit, Line, Col);
   DenseMap<DebugLocTuple, unsigned>::iterator II
     = DebugLocInfo.DebugIdMap.find(Tuple);
   if (II != DebugLocInfo.DebugIdMap.end())