add a SelectionDAG method to check if no common bits are set in two nodes; NFCI

[oota-llvm.git] / include / llvm / CodeGen / LivePhysRegs.h

diff --git a/include/llvm/CodeGen/LivePhysRegs.h b/include/llvm/CodeGen/LivePhysRegs.h
index 6ffd3eeea351f56caf81f93a5a77e18e431b5493..3bdf5ae8d0132075a3f96d6d23531f0c890c59bb 100644 (file)
--- a/include/llvm/CodeGen/LivePhysRegs.h
+++ b/include/llvm/CodeGen/LivePhysRegs.h
@@ -109,26 +109,22 @@ public:
   /// \brief Simulates liveness when stepping forward over an
   /// instruction(bundle): Remove killed-uses, add defs. This is the not
   /// recommended way, because it depends on accurate kill flags. If possible
-  /// use stepBackwards() instead of this function.
+  /// use stepBackward() instead of this function.
   /// The clobbers set will be the list of registers either defined or clobbered
   /// by a regmask.  The operand will identify whether this is a regmask or
   /// register operand.
   void stepForward(const MachineInstr &MI,
         SmallVectorImpl<std::pair<unsigned, const MachineOperand*>> &Clobbers);
 
-  /// \brief Adds all live-in registers of basic block @p MBB.
-  void addLiveIns(const MachineBasicBlock *MBB) {
-    for (MachineBasicBlock::livein_iterator LI = MBB->livein_begin(),
-         LE = MBB->livein_end(); LI != LE; ++LI)
-      addReg(*LI);
-  }
+  /// \brief Adds all live-in registers of basic block @p MBB; After prologue/
+  /// epilogue insertion \p AddPristines should be set to true to insert the
+  /// pristine registers.
+  void addLiveIns(const MachineBasicBlock *MBB, bool AddPristines = false);
 
-  /// \brief Adds all live-out registers of basic block @p MBB.
-  void addLiveOuts(const MachineBasicBlock *MBB) {
-    for (MachineBasicBlock::const_succ_iterator SI = MBB->succ_begin(),
-         SE = MBB->succ_end(); SI != SE; ++SI)
-      addLiveIns(*SI);
-  }
+  /// \brief Adds all live-out registers of basic block @p MBB; After prologue/
+  /// epilogue insertion \p AddPristinesAndCSRs should be set to true.
+  void addLiveOuts(const MachineBasicBlock *MBB,
+                   bool AddPristinesAndCSRs = false);
 
   typedef SparseSet<unsigned>::const_iterator const_iterator;
   const_iterator begin() const { return LiveRegs.begin(); }