1 files changed, 7 insertions, 0 deletions
diff --git a/lib/Target/X86/X86InstrInfo.h b/lib/Target/X86/X86InstrInfo.h
index cf8a9fa66a..5f3491536d 100644
--- a/lib/Target/X86/X86InstrInfo.h
+++ b/lib/Target/X86/X86InstrInfo.h
@@ -359,6 +359,13 @@ public:
   /// instruction that defines the specified register class.
   bool isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const override;
 
+  /// isSafeToClobberEFLAGS - Return true if it's safe insert an instruction tha
+  /// would clobber the EFLAGS condition register. Note the result may be
+  /// conservative. If it cannot definitely determine the safety after visiting
+  /// a few instructions in each direction it assumes it's not safe.
+  bool isSafeToClobberEFLAGS(MachineBasicBlock &MBB,
+                             MachineBasicBlock::iterator I) const;
+
   static bool isX86_64ExtendedReg(const MachineOperand &MO) {
     if (!MO.isReg()) return false;
     return X86II::isX86_64ExtendedReg(MO.getReg());