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/Analysis/IndirectCallPromotionAnalysis.cpp b/llvm/lib/Analysis/IndirectCallPromotionAnalysis.cpp
index c11176b..4659c0a 100644
--- a/llvm/lib/Analysis/IndirectCallPromotionAnalysis.cpp
+++ b/llvm/lib/Analysis/IndirectCallPromotionAnalysis.cpp
@@ -71,19 +71,19 @@
     const Instruction *Inst, uint32_t NumVals, uint64_t TotalCount) {
   ArrayRef<InstrProfValueData> ValueDataRef(ValueDataArray.get(), NumVals);
 
-  DEBUG(dbgs() << " \nWork on callsite " << *Inst << " Num_targets: " << NumVals
-               << "\n");
+  LLVM_DEBUG(dbgs() << " \nWork on callsite " << *Inst
+                    << " Num_targets: " << NumVals << "\n");
 
   uint32_t I = 0;
   uint64_t RemainingCount = TotalCount;
   for (; I < MaxNumPromotions && I < NumVals; I++) {
     uint64_t Count = ValueDataRef[I].Count;
     assert(Count <= RemainingCount);
-    DEBUG(dbgs() << " Candidate " << I << " Count=" << Count
-                 << "  Target_func: " << ValueDataRef[I].Value << "\n");
+    LLVM_DEBUG(dbgs() << " Candidate " << I << " Count=" << Count
+                      << "  Target_func: " << ValueDataRef[I].Value << "\n");
 
     if (!isPromotionProfitable(Count, TotalCount, RemainingCount)) {
-      DEBUG(dbgs() << " Not promote: Cold target.\n");
+      LLVM_DEBUG(dbgs() << " Not promote: Cold target.\n");
       return I;
     }
     RemainingCount -= Count;