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/Mips/MipsOs16.cpp b/llvm/lib/Target/Mips/MipsOs16.cpp
index 7ee45c2..4edcb31 100644
--- a/llvm/lib/Target/Mips/MipsOs16.cpp
+++ b/llvm/lib/Target/Mips/MipsOs16.cpp
@@ -96,7 +96,8 @@
         ;
       }
       if (const CallInst *CI = dyn_cast<CallInst>(I)) {
-        DEBUG(dbgs() << "Working on call" << "\n");
+        LLVM_DEBUG(dbgs() << "Working on call"
+                          << "\n");
         Function &F_ =  *CI->getCalledFunction();
         if (needsFPFromSig(F_))
           return true;
@@ -110,9 +111,10 @@
   bool usingMask = Mips32FunctionMask.length() > 0;
   bool doneUsingMask = false; // this will make it stop repeating
 
-  DEBUG(dbgs() << "Run on Module MipsOs16 \n" << Mips32FunctionMask << "\n");
+  LLVM_DEBUG(dbgs() << "Run on Module MipsOs16 \n"
+                    << Mips32FunctionMask << "\n");
   if (usingMask)
-    DEBUG(dbgs() << "using mask \n" << Mips32FunctionMask << "\n");
+    LLVM_DEBUG(dbgs() << "using mask \n" << Mips32FunctionMask << "\n");
 
   unsigned int functionIndex = 0;
   bool modified = false;
@@ -121,14 +123,14 @@
     if (F.isDeclaration())
       continue;
 
-    DEBUG(dbgs() << "Working on " << F.getName() << "\n");
+    LLVM_DEBUG(dbgs() << "Working on " << F.getName() << "\n");
     if (usingMask) {
       if (!doneUsingMask) {
         if (functionIndex == Mips32FunctionMask.length())
           functionIndex = 0;
         switch (Mips32FunctionMask[functionIndex]) {
         case '1':
-          DEBUG(dbgs() << "mask forced mips32: " << F.getName() << "\n");
+          LLVM_DEBUG(dbgs() << "mask forced mips32: " << F.getName() << "\n");
           F.addFnAttr("nomips16");
           break;
         case '.':
@@ -142,11 +144,11 @@
     }
     else {
       if (needsFP(F)) {
-        DEBUG(dbgs() << "os16 forced mips32: " << F.getName() << "\n");
+        LLVM_DEBUG(dbgs() << "os16 forced mips32: " << F.getName() << "\n");
         F.addFnAttr("nomips16");
       }
       else {
-        DEBUG(dbgs() << "os16 forced mips16: " << F.getName() << "\n");
+        LLVM_DEBUG(dbgs() << "os16 forced mips16: " << F.getName() << "\n");
         F.addFnAttr("mips16");
       }
     }