Make TargetInstrInfo::isPredicable take a const reference, NFC

llvm-svn: 296901
diff --git a/llvm/lib/Target/Hexagon/HexagonInstrInfo.cpp b/llvm/lib/Target/Hexagon/HexagonInstrInfo.cpp
index 509d838..ee49a08 100644
--- a/llvm/lib/Target/Hexagon/HexagonInstrInfo.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonInstrInfo.cpp
@@ -1434,7 +1434,7 @@
   return false;
 }
 
-bool HexagonInstrInfo::isPredicable(MachineInstr &MI) const {
+bool HexagonInstrInfo::isPredicable(const MachineInstr &MI) const {
   return MI.getDesc().isPredicable();
 }
 
diff --git a/llvm/lib/Target/Hexagon/HexagonInstrInfo.h b/llvm/lib/Target/Hexagon/HexagonInstrInfo.h
index 2358d4b..c1eb216 100644
--- a/llvm/lib/Target/Hexagon/HexagonInstrInfo.h
+++ b/llvm/lib/Target/Hexagon/HexagonInstrInfo.h
@@ -235,7 +235,7 @@
   /// Return true if the specified instruction can be predicated.
   /// By default, this returns true for every instruction with a
   /// PredicateOperand.
-  bool isPredicable(MachineInstr &MI) const override;
+  bool isPredicable(const MachineInstr &MI) const override;
 
   /// Test if the given instruction should be considered a scheduling boundary.
   /// This primarily includes labels and terminators.