- /// This method returns a pointer to the DataLayout for the target. It should
- /// be unchanging for every subtarget.
- const DataLayout *getDataLayout() const { return &DL; }
+ /// Create a DataLayout.
+ const DataLayout createDataLayout() const { return DL; }
+
+ /// Test if a DataLayout if compatible with the CodeGen for this target.
+ ///
+ /// The LLVM Module owns a DataLayout that is used for the target independent
+ /// optimizations and code generation. This hook provides a target specific
+ /// check on the validity of this DataLayout.
+ bool isCompatibleDataLayout(const DataLayout &Candidate) const {
+ return DL == Candidate;
+ }
+
+ /// Get the pointer size for this target.
+ ///
+ /// This is the only time the DataLayout in the TargetMachine is used.
+ unsigned getPointerSize() const { return DL.getPointerSize(); }