TargetMachine: Move trivial setter/getter to header

The others are already inline here.

Author: arsenm

llvm/include/llvm/Target/TargetMachine.h

@@ -254,10 +254,10 @@ class TargetMachine {
   TLSModel::Model getTLSModel(const GlobalValue *GV) const;
 
   /// Returns the optimization level: None, Less, Default, or Aggressive.
-  CodeGenOptLevel getOptLevel() const;
+  CodeGenOptLevel getOptLevel() const { return OptLevel; }
 
   /// Overrides the optimization level.
-  void setOptLevel(CodeGenOptLevel Level);
+  void setOptLevel(CodeGenOptLevel Level) { OptLevel = Level; }
 
   void setFastISel(bool Enable) { Options.EnableFastISel = Enable; }
   bool getO0WantsFastISel() { return O0WantsFastISel; }

llvm/lib/Target/TargetMachine.cpp

@@ -262,11 +262,6 @@ TLSModel::Model TargetMachine::getTLSModel(const GlobalValue *GV) const {
   return Model;
 }
 
-/// Returns the optimization level: None, Less, Default, or Aggressive.
-CodeGenOptLevel TargetMachine::getOptLevel() const { return OptLevel; }
-
-void TargetMachine::setOptLevel(CodeGenOptLevel Level) { OptLevel = Level; }
-
 TargetTransformInfo
 TargetMachine::getTargetTransformInfo(const Function &F) const {
   return TargetTransformInfo(F.getDataLayout());