Remove dead function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185731 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/MachineInstr.h

@@ -908,11 +908,6 @@ class MachineInstr : public ilist_node<MachineInstr> {
   bool isSafeToMove(const TargetInstrInfo *TII, AliasAnalysis *AA,
                     bool &SawStore) const;
 
-  /// isSafeToReMat - Return true if it's safe to rematerialize the specified
-  /// instruction which defined the specified register instead of copying it.
-  bool isSafeToReMat(const TargetInstrInfo *TII, AliasAnalysis *AA,
-                     unsigned DstReg) const;
-
   /// hasOrderedMemoryRef - Return true if this instruction may have an ordered
   /// or volatile memory reference, or if the information describing the memory
   /// reference is not available. Return false if it is known to have no

lib/CodeGen/MachineInstr.cpp

@@ -1253,32 +1253,6 @@ bool MachineInstr::isSafeToMove(const TargetInstrInfo *TII,
   return true;
 }
 
-/// isSafeToReMat - Return true if it's safe to rematerialize the specified
-/// instruction which defined the specified register instead of copying it.
-bool MachineInstr::isSafeToReMat(const TargetInstrInfo *TII,
-                                 AliasAnalysis *AA,
-                                 unsigned DstReg) const {
-  bool SawStore = false;
-  if (!TII->isTriviallyReMaterializable(this, AA) ||
-      !isSafeToMove(TII, AA, SawStore))
-    return false;
-  for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
-    const MachineOperand &MO = getOperand(i);
-    if (!MO.isReg())
-      continue;
-    // FIXME: For now, do not remat any instruction with register operands.
-    // Later on, we can loosen the restriction is the register operands have
-    // not been modified between the def and use. Note, this is different from
-    // MachineSink because the code is no longer in two-address form (at least
-    // partially).
-    if (MO.isUse())
-      return false;
-    else if (!MO.isDead() && MO.getReg() != DstReg)
-      return false;
-  }
-  return true;
-}
-
 /// hasOrderedMemoryRef - Return true if this instruction may have an ordered
 /// or volatile memory reference, or if the information describing the memory
 /// reference is not available. Return false if it is known to have no ordered