From: Evan Cheng <evan.cheng@apple.com>
Date: Fri, 15 Jun 2007 21:13:54 +0000 (+0000)
Subject: Added CanBeDuplicated(). It returns true if an instruction can be safely duplicated... 
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=61a2598ebe007091e054325f568d1cc50c9ff3d2;p=oota-llvm.git

Added CanBeDuplicated(). It returns true if an instruction can be safely duplicated (e.g. during ifcvt).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37605 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/Target/TargetInstrInfo.h b/include/llvm/Target/TargetInstrInfo.h
index 2d73dbf83c8..c73fdfb46cd 100644
--- a/include/llvm/Target/TargetInstrInfo.h
+++ b/include/llvm/Target/TargetInstrInfo.h
@@ -415,6 +415,13 @@ public:
     return false;
   }
 
+  /// CanBeDuplicated - Returns true if the instruction can be duplicated
+  /// without causing unforseenable side-effect (e.g. instructions with unique
+  /// labels attached).
+  virtual bool CanBeDuplicated(const MachineInstr *MI) const {
+    return false;
+  }
+
   /// isUnpredicatedTerminator - Returns true if the instruction is a
   /// terminator instruction that has not been predicated.
   virtual bool isUnpredicatedTerminator(const MachineInstr *MI) const;