Cleanup dump() functions.

We had various variants of defining dump() functions in LLVM. Normalize
them (this should just consistently implement the things discussed in
http://lists.llvm.org/pipermail/cfe-dev/2014-January/034323.html

For reference:
- Public headers should just declare the dump() method but not use
  LLVM_DUMP_METHOD or #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
- The definition of a dump method should look like this:
  #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
  LLVM_DUMP_METHOD void MyClass::dump() {
    // print stuff to dbgs()...
  }
  #endif

llvm-svn: 293359
diff --git a/llvm/lib/Target/Hexagon/HexagonSplitDouble.cpp b/llvm/lib/Target/Hexagon/HexagonSplitDouble.cpp
index 2c93721..176d3f7 100644
--- a/llvm/lib/Target/Hexagon/HexagonSplitDouble.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonSplitDouble.cpp
@@ -131,13 +131,15 @@
 INITIALIZE_PASS(HexagonSplitDoubleRegs, "hexagon-split-double",
   "Hexagon Split Double Registers", false, false)
 
-void HexagonSplitDoubleRegs::dump_partition(raw_ostream &os,
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+LLVM_DUMP_METHOD void HexagonSplitDoubleRegs::dump_partition(raw_ostream &os,
       const USet &Part, const TargetRegisterInfo &TRI) {
   dbgs() << '{';
   for (auto I : Part)
     dbgs() << ' ' << PrintReg(I, &TRI);
   dbgs() << " }";
 }
+#endif
 
 bool HexagonSplitDoubleRegs::isInduction(unsigned Reg, LoopRegMap &IRM) const {
   for (auto I : IRM) {