Rename DEBUG macro to LLVM_DEBUG.
    
The DEBUG() macro is very generic so it might clash with other projects.
The renaming was done as follows:
- git grep -l 'DEBUG' | xargs sed -i 's/\bDEBUG\s\?(/LLVM_DEBUG(/g'
- git diff -U0 master | ../clang/tools/clang-format/clang-format-diff.py -i -p1 -style LLVM
- Manual change to APInt
- Manually chage DOCS as regex doesn't match it.

In the transition period the DEBUG() macro is still present and aliased
to the LLVM_DEBUG() one.

Differential Revision: https://reviews.llvm.org/D43624

llvm-svn: 332240
diff --git a/llvm/lib/CodeGen/StackMapLivenessAnalysis.cpp b/llvm/lib/CodeGen/StackMapLivenessAnalysis.cpp
index 32d6f54..fc2895a 100644
--- a/llvm/lib/CodeGen/StackMapLivenessAnalysis.cpp
+++ b/llvm/lib/CodeGen/StackMapLivenessAnalysis.cpp
@@ -106,8 +106,8 @@
   if (!EnablePatchPointLiveness)
     return false;
 
-  DEBUG(dbgs() << "********** COMPUTING STACKMAP LIVENESS: " << MF.getName()
-               << " **********\n");
+  LLVM_DEBUG(dbgs() << "********** COMPUTING STACKMAP LIVENESS: "
+                    << MF.getName() << " **********\n");
   TRI = MF.getSubtarget().getRegisterInfo();
   ++NumStackMapFuncVisited;
 
@@ -124,7 +124,7 @@
   bool HasChanged = false;
   // For all basic blocks in the function.
   for (auto &MBB : MF) {
-    DEBUG(dbgs() << "****** BB " << MBB.getName() << " ******\n");
+    LLVM_DEBUG(dbgs() << "****** BB " << MBB.getName() << " ******\n");
     LiveRegs.init(*TRI);
     // FIXME: This should probably be addLiveOuts().
     LiveRegs.addLiveOutsNoPristines(MBB);
@@ -138,7 +138,7 @@
         HasStackMap = true;
         ++NumStackMaps;
       }
-      DEBUG(dbgs() << "   " << LiveRegs << "   " << *I);
+      LLVM_DEBUG(dbgs() << "   " << LiveRegs << "   " << *I);
       LiveRegs.stepBackward(*I);
     }
     ++NumBBsVisited;