add efficient iteration support for register use/def's

within a machine function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45479 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/MachineOperand.h b/include/llvm/CodeGen/MachineOperand.h
index 66f106a401..a782ff538c 100644
--- a/include/llvm/CodeGen/MachineOperand.h
+++ b/include/llvm/CodeGen/MachineOperand.h
@@ -175,6 +175,13 @@ public:
     assert(isRegister() && "Wrong MachineOperand accessor");
     return IsKill;
   }
+  
+  /// getNextOperandForReg - Return the next MachineOperand in the function that
+  /// uses or defines this register.
+  MachineOperand *getNextOperandForReg() const {
+    assert(isRegister() && "This is not a register operand!");
+    return Contents.Reg.Next;
+  }
 
   //===--------------------------------------------------------------------===//
   // Mutators for Register Operands