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/Target/ARC/ARCBranchFinalize.cpp b/llvm/lib/Target/ARC/ARCBranchFinalize.cpp
index 9341e7b..3b410fa 100644
--- a/llvm/lib/Target/ARC/ARCBranchFinalize.cpp
+++ b/llvm/lib/Target/ARC/ARCBranchFinalize.cpp
@@ -112,7 +112,7 @@
 }
 
 void ARCBranchFinalize::replaceWithBRcc(MachineInstr *MI) const {
-  DEBUG(dbgs() << "Replacing pseudo branch with BRcc\n");
+  LLVM_DEBUG(dbgs() << "Replacing pseudo branch with BRcc\n");
   unsigned CC = getCCForBRcc(MI->getOperand(3).getImm());
   if (CC != -1U) {
     BuildMI(*MI->getParent(), MI, MI->getDebugLoc(),
@@ -128,8 +128,8 @@
 }
 
 void ARCBranchFinalize::replaceWithCmpBcc(MachineInstr *MI) const {
-  DEBUG(dbgs() << "Branch: " << *MI << "\n");
-  DEBUG(dbgs() << "Replacing pseudo branch with Cmp + Bcc\n");
+  LLVM_DEBUG(dbgs() << "Branch: " << *MI << "\n");
+  LLVM_DEBUG(dbgs() << "Replacing pseudo branch with Cmp + Bcc\n");
   BuildMI(*MI->getParent(), MI, MI->getDebugLoc(),
           TII->get(getCmpForPseudo(MI)))
       .addReg(MI->getOperand(1).getReg())
@@ -141,8 +141,8 @@
 }
 
 bool ARCBranchFinalize::runOnMachineFunction(MachineFunction &MF) {
-  DEBUG(dbgs() << "Running ARC Branch Finalize on "
-               << MF.getName() << "\n");
+  LLVM_DEBUG(dbgs() << "Running ARC Branch Finalize on " << MF.getName()
+                    << "\n");
   std::vector<MachineInstr *> Branches;
   bool Changed = false;
   unsigned MaxSize = 0;
@@ -156,7 +156,7 @@
     for (auto &MI : MBB) {
       unsigned Size = TII->getInstSizeInBytes(MI);
       if (Size > 8 || Size == 0) {
-        DEBUG(dbgs() << "Unknown (or size 0) size for: " << MI << "\n");
+        LLVM_DEBUG(dbgs() << "Unknown (or size 0) size for: " << MI << "\n");
       } else {
         MaxSize += Size;
       }
@@ -172,8 +172,8 @@
       isInt<9>(MaxSize) ? replaceWithBRcc(P.first) : replaceWithCmpBcc(P.first);
   }
 
-  DEBUG(dbgs() << "Estimated function size for " << MF.getName()
-               << ": " << MaxSize << "\n");
+  LLVM_DEBUG(dbgs() << "Estimated function size for " << MF.getName() << ": "
+                    << MaxSize << "\n");
 
   return Changed;
 }