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/MacroFusion.cpp b/llvm/lib/CodeGen/MacroFusion.cpp
index 5b3523b..2df72d8 100644
--- a/llvm/lib/CodeGen/MacroFusion.cpp
+++ b/llvm/lib/CodeGen/MacroFusion.cpp
@@ -66,11 +66,11 @@
     if (SI.getSUnit() == &FirstSU)
       SI.setLatency(0);
 
-  DEBUG(dbgs() << "Macro fuse: ";
-        FirstSU.print(dbgs(), &DAG); dbgs() << " - ";
-        SecondSU.print(dbgs(), &DAG); dbgs() << " /  ";
-        dbgs() << DAG.TII->getName(FirstSU.getInstr()->getOpcode()) << " - " <<
-                  DAG.TII->getName(SecondSU.getInstr()->getOpcode()) << '\n'; );
+  LLVM_DEBUG(
+      dbgs() << "Macro fuse: "; FirstSU.print(dbgs(), &DAG); dbgs() << " - ";
+      SecondSU.print(dbgs(), &DAG); dbgs() << " /  ";
+      dbgs() << DAG.TII->getName(FirstSU.getInstr()->getOpcode()) << " - "
+             << DAG.TII->getName(SecondSU.getInstr()->getOpcode()) << '\n';);
 
   // Make data dependencies from the FirstSU also dependent on the SecondSU to
   // prevent them from being scheduled between the FirstSU and the SecondSU.
@@ -80,9 +80,8 @@
       if (SI.isWeak() || isHazard(SI) ||
           SU == &DAG.ExitSU || SU == &SecondSU || SU->isPred(&SecondSU))
         continue;
-      DEBUG(dbgs() << "  Bind ";
-            SecondSU.print(dbgs(), &DAG); dbgs() << " - ";
-            SU->print(dbgs(), &DAG); dbgs() << '\n';);
+      LLVM_DEBUG(dbgs() << "  Bind "; SecondSU.print(dbgs(), &DAG);
+                 dbgs() << " - "; SU->print(dbgs(), &DAG); dbgs() << '\n';);
       DAG.addEdge(SU, SDep(&SecondSU, SDep::Artificial));
     }
 
@@ -93,9 +92,8 @@
       SUnit *SU = SI.getSUnit();
       if (SI.isWeak() || isHazard(SI) || &FirstSU == SU || FirstSU.isSucc(SU))
         continue;
-      DEBUG(dbgs() << "  Bind ";
-            SU->print(dbgs(), &DAG); dbgs() << " - ";
-            FirstSU.print(dbgs(), &DAG); dbgs() << '\n';);
+      LLVM_DEBUG(dbgs() << "  Bind "; SU->print(dbgs(), &DAG); dbgs() << " - ";
+                 FirstSU.print(dbgs(), &DAG); dbgs() << '\n';);
       DAG.addEdge(&FirstSU, SDep(SU, SDep::Artificial));
     }