From 3ced97c0a05273eae61b9bc89725780fd04028e0 Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Sat, 15 May 2010 02:52:58 +0000
Subject: [PATCH] Add reg_nodbg_iterator

llvm-svn: 103856
---
 llvm/include/llvm/CodeGen/MachineRegisterInfo.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/llvm/include/llvm/CodeGen/MachineRegisterInfo.h b/llvm/include/llvm/CodeGen/MachineRegisterInfo.h
index 131231e5ba0c..fd7431ff0bcb 100644
--- a/llvm/include/llvm/CodeGen/MachineRegisterInfo.h
+++ b/llvm/include/llvm/CodeGen/MachineRegisterInfo.h
@@ -93,6 +93,20 @@ public:
   /// specified register (it may be live-in).
   bool reg_empty(unsigned RegNo) const { return reg_begin(RegNo) == reg_end(); }
 
+  /// reg_nodbg_iterator/reg_nodbg_begin/reg_nodbg_end - Walk all defs and uses
+  /// of the specified register, skipping those marked as Debug.
+  typedef defusechain_iterator<true,true,true> reg_nodbg_iterator;
+  reg_nodbg_iterator reg_nodbg_begin(unsigned RegNo) const {
+    return reg_nodbg_iterator(getRegUseDefListHead(RegNo));
+  }
+  static reg_nodbg_iterator reg_nodbg_end() { return reg_nodbg_iterator(0); }
+
+  /// reg_nodbg_empty - Return true if the only instructions using or defining
+  /// Reg are Debug instructions.
+  bool reg_nodbg_empty(unsigned RegNo) const {
+    return reg_nodbg_begin(RegNo) == reg_nodbg_end();
+  }
+
   /// def_iterator/def_begin/def_end - Walk all defs of the specified register.
   typedef defusechain_iterator<false,true,false> def_iterator;
   def_iterator def_begin(unsigned RegNo) const {