[mips] Define a helper function which creates an instruction with the same

operands as the prototype instruction but with a different opcode.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181714 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/Target/Mips/MipsInstrInfo.h b/lib/Target/Mips/MipsInstrInfo.h
index 6a57736aad1e..0f075ec6d035 100644
--- a/lib/Target/Mips/MipsInstrInfo.h
+++ b/lib/Target/Mips/MipsInstrInfo.h
@@ -17,6 +17,7 @@
 #include "Mips.h"
 #include "MipsAnalyzeImmediate.h"
 #include "MipsRegisterInfo.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Target/TargetInstrInfo.h"
 
@@ -116,6 +117,11 @@ public:
                                 const TargetRegisterInfo *TRI,
                                 int64_t Offset) const = 0;
 
+  /// Create an instruction which has the same operands and memory operands
+  /// as MI but has a new opcode.
+  MachineInstrBuilder genInstrWithNewOpc(unsigned NewOpc,
+                                         MachineBasicBlock::iterator I) const;
+
 protected:
   bool isZeroImm(const MachineOperand &op) const;