add operand iterator apis to MachineInstr, patch by ether zhhb.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118862 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 1 deletions

diff --git a/include/llvm/CodeGen/MachineInstr.h b/include/llvm/CodeGen/MachineInstr.h
index fc84f8c953..d1f17d39db 100644
--- a/include/llvm/CodeGen/MachineInstr.h
+++ b/include/llvm/CodeGen/MachineInstr.h
@@ -167,7 +167,17 @@ public:
   /// getNumExplicitOperands - Returns the number of non-implicit operands.
   ///
   unsigned getNumExplicitOperands() const;
-  
+
+  /// iterator/begin/end - Iterate over all operands of a machine instruction.
+  typedef std::vector<MachineOperand>::iterator mop_iterator;
+  typedef std::vector<MachineOperand>::const_iterator const_mop_iterator;
+
+  mop_iterator operands_begin() { return Operands.begin(); }
+  mop_iterator operands_end() { return Operands.end(); }
+
+  const_mop_iterator operands_begin() const { return Operands.begin(); }
+  const_mop_iterator operands_end() const { return Operands.end(); }
+
   /// Access to memory operands of the instruction
   mmo_iterator memoperands_begin() const { return MemRefs; }
   mmo_iterator memoperands_end() const { return MemRefsEnd; }