Liveness Analysis Pass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197254 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/MachineFunction.h b/include/llvm/CodeGen/MachineFunction.h
index 43b370cccf..09cc1e5dfb 100644
--- a/include/llvm/CodeGen/MachineFunction.h
+++ b/include/llvm/CodeGen/MachineFunction.h
@@ -426,6 +426,15 @@ public:
     OperandRecycler.deallocate(Cap, Array);
   }
 
+  /// \brief Allocate and initialize a register mask with @p NumRegister bits.
+  uint32_t *allocateRegisterMask(unsigned NumRegister) {
+    unsigned Size = (NumRegister + 31) / 32;
+    uint32_t *Mask = Allocator.Allocate<uint32_t>(Size);
+    for (unsigned i = 0; i != Size; ++i)
+      Mask[i] = 0;
+    return Mask;
+  }
+
   /// allocateMemRefsArray - Allocate an array to hold MachineMemOperand
   /// pointers.  This array is owned by the MachineFunction.
   MachineInstr::mmo_iterator allocateMemRefsArray(unsigned long Num);