allow functions and modules to have an explicit alignment

llvm-svn: 24209

llvm/include/llvm/GlobalValue.h

@@ -42,11 +42,18 @@ protected:
 
   LinkageTypes Linkage;   // The linkage of this global
   Module *Parent;
+  unsigned Alignment;
 public:
   ~GlobalValue() {
     removeDeadConstantUsers();   // remove any dead constants using this.
   }
 
+  unsigned getAlignment() const { return Alignment; }
+  void setAlignment(unsigned Align) {
+    assert((Align & (Align-1)) == 0 && "Alignment is not a power of 2!");
+    Alignment = Align;
+  }
+  
   /// If the usage is empty (except transitively dead constants), then this
   /// global value can can be safely deleted since the destructor will
   /// delete the dead constants as well.