Move LLT::dump()'s impl to LowLevelType.cpp

Suggested by @jobnoorman
https://reviews.llvm.org/D148767#4317848

Author: chapuni

llvm/include/llvm/CodeGen/LowLevelType.h

@@ -265,10 +265,7 @@ class LLT {
   void print(raw_ostream &OS) const;
 
 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
-  LLVM_DUMP_METHOD void dump() const {
-    print(dbgs());
-    dbgs() << '\n';
-  }
+  LLVM_DUMP_METHOD void dump() const;
 #endif
 
   constexpr bool operator==(const LLT &RHS) const {

llvm/lib/CodeGen/LowLevelType.cpp

@@ -47,6 +47,13 @@ void LLT::print(raw_ostream &OS) const {
     OS << "LLT_invalid";
 }
 
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+LLVM_DUMP_METHOD void LLT::dump() const {
+  print(dbgs());
+  dbgs() << '\n';
+}
+#endif
+
 const constexpr LLT::BitFieldInfo LLT::ScalarSizeFieldInfo;
 const constexpr LLT::BitFieldInfo LLT::PointerSizeFieldInfo;
 const constexpr LLT::BitFieldInfo LLT::PointerAddressSpaceFieldInfo;