Add MachineRegisterInfo::use_empty.

llvm-svn: 52451
2008-06-18 07:47:55 +00:00 · 2008-06-18 07:47:55 +00:00 · 84da6318ca
parent 50d59478da
commit 84da6318ca
1 changed files with 4 additions and 0 deletions
--- a/llvm/include/llvm/CodeGen/MachineRegisterInfo.h
+++ b/llvm/include/llvm/CodeGen/MachineRegisterInfo.h
@ -90,6 +90,10 @@ public:
  }
  static use_iterator use_end() { return use_iterator(0); }
  
+  /// use_empty - Return true if there are no instructions using the specified
+  /// register.
+  bool use_empty(unsigned RegNo) const { return use_begin(RegNo) == use_end(); }
+
  
  /// replaceRegWith - Replace all instances of FromReg with ToReg in the
  /// machine function.  This is like llvm-level X->replaceAllUsesWith(Y),