commit 151687cb8c4fc65fefcd8964a0c3d77680e90a5c
author Akira Hatanaka <ahatanaka@mips.com> Mon May 13 17:57:42 2013 +0000
committer Akira Hatanaka <ahatanaka@mips.com> Mon May 13 17:57:42 2013 +0000
tree 60132efb6911563157d3a9f21143ea4d189f0ba3
parent 6daba286836e6fb2351e7ebc248e18a5c80e8a31

[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

lib/Target/Mips/MipsInstrInfo.cpp

diff --git a/lib/Target/Mips/MipsInstrInfo.cpp b/lib/Target/Mips/MipsInstrInfo.cpp
index 336b62d..3144dae 100644
--- a/lib/Target/Mips/MipsInstrInfo.cpp
+++ b/lib/Target/Mips/MipsInstrInfo.cpp
@@ -282,3 +282,16 @@
   }
   }
 }
+
+MachineInstrBuilder
+MipsInstrInfo::genInstrWithNewOpc(unsigned NewOpc,
+                                  MachineBasicBlock::iterator I) const {
+  MachineInstrBuilder MIB;
+  MIB = BuildMI(*I->getParent(), I, I->getDebugLoc(), get(NewOpc));
+
+  for (unsigned J = 0, E = I->getDesc().getNumOperands(); J < E; ++J)
+    MIB.addOperand(I->getOperand(J));
+
+  MIB.setMemRefs(I->memoperands_begin(), I->memoperands_end());
+  return MIB;
+}

lib/Target/Mips/MipsInstrInfo.h

diff --git a/lib/Target/Mips/MipsInstrInfo.h b/lib/Target/Mips/MipsInstrInfo.h
index 6a57736..0f075ec 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 @@
                                 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;