[IR] Move trivial accessor Module::getDataLayout into header

Author: jayfoad

llvm/include/llvm/IR/Module.h

@@ -251,7 +251,7 @@ class LLVM_EXTERNAL_VISIBILITY Module {
   }
 
   /// Get the data layout for the module's target platform.
-  const DataLayout &getDataLayout() const;
+  const DataLayout &getDataLayout() const { return DL; }
 
   /// Get the target triple which is a string describing the target host.
   /// @returns a string containing the target triple.

llvm/lib/IR/Module.cpp

@@ -395,8 +395,6 @@ void Module::setDataLayout(StringRef Desc) {
 
 void Module::setDataLayout(const DataLayout &Other) { DL = Other; }
 
-const DataLayout &Module::getDataLayout() const { return DL; }
-
 DICompileUnit *Module::debug_compile_units_iterator::operator*() const {
   return cast<DICompileUnit>(CUs->getOperand(Idx));
 }