PredicateInstruction returns true if the operation was successful.

llvm-svn: 37124

1 files changed, 19 insertions, 14 deletions

diff --git a/llvm/lib/Target/TargetInstrInfo.cpp b/llvm/lib/Target/TargetInstrInfo.cpp
index fe5ee1d25e0..d1413510fff 100644
--- a/llvm/lib/Target/TargetInstrInfo.cpp
+++ b/llvm/lib/Target/TargetInstrInfo.cpp
@@ -60,22 +60,27 @@ MachineInstr *TargetInstrInfo::commuteInstruction(MachineInstr *MI) const {
   return MI;
 }
 
-void TargetInstrInfo::PredicateInstruction(MachineInstr *MI,
+bool TargetInstrInfo::PredicateInstruction(MachineInstr *MI,
                                       std::vector<MachineOperand> &Cond) const {
+  bool MadeChange = false;
   const TargetInstrDescriptor *TID = MI->getInstrDescriptor();
-  assert((TID->Flags & M_PREDICABLE) &&
-         "Predicating an unpredicable instruction!");
-
-  for (unsigned j = 0, i = 0, e = MI->getNumOperands(); i != e; ++i) {
-    if ((TID->OpInfo[i].Flags & M_PREDICATE_OPERAND)) {
-      MachineOperand &MO = MI->getOperand(i);
-      if (MO.isReg())
-        MO.setReg(Cond[j].getReg());
-      else if (MO.isImm())
-        MO.setImm(Cond[j].getImmedValue());
-      else if (MO.isMBB())
-        MO.setMachineBasicBlock(Cond[j].getMachineBasicBlock());
-      ++j;
+  if (TID->Flags & M_PREDICABLE) {
+    for (unsigned j = 0, i = 0, e = MI->getNumOperands(); i != e; ++i) {
+      if ((TID->OpInfo[i].Flags & M_PREDICATE_OPERAND)) {
+        MachineOperand &MO = MI->getOperand(i);
+        if (MO.isReg()) {
+          MO.setReg(Cond[j].getReg());
+          MadeChange = true;
+        } else if (MO.isImm()) {
+          MO.setImm(Cond[j].getImmedValue());
+          MadeChange = true;
+        } else if (MO.isMBB()) {
+          MO.setMachineBasicBlock(Cond[j].getMachineBasicBlock());
+          MadeChange = true;
+        }
+        ++j;
+      }
     }
   }
+  return MadeChange;
 }