[CodeGen] Rename MachineInstrBuilder::addOperand. NFC

Rename from addOperand to just add, to match the other method that has been
added to MachineInstrBuilder for adding more than just 1 operand.

See https://reviews.llvm.org/D28057 for the whole discussion.

Differential Revision: https://reviews.llvm.org/D28556

llvm-svn: 291891
diff --git a/llvm/lib/Target/PowerPC/PPCVSXCopy.cpp b/llvm/lib/Target/PowerPC/PPCVSXCopy.cpp
index 3b5d8f0..f3a0290 100644
--- a/llvm/lib/Target/PowerPC/PPCVSXCopy.cpp
+++ b/llvm/lib/Target/PowerPC/PPCVSXCopy.cpp
@@ -112,7 +112,7 @@
                   TII->get(TargetOpcode::SUBREG_TO_REG), NewVReg)
               .addImm(1) // add 1, not 0, because there is no implicit clearing
                          // of the high bits.
-              .addOperand(SrcMO)
+              .add(SrcMO)
               .addImm(PPC::sub_64);
 
           // The source of the original copy is now the new virtual register.
@@ -132,7 +132,7 @@
           unsigned NewVReg = MRI.createVirtualRegister(DstRC);
           BuildMI(MBB, MI, MI.getDebugLoc(), TII->get(TargetOpcode::COPY),
                   NewVReg)
-              .addOperand(SrcMO);
+              .add(SrcMO);
 
           // Transform the original copy into a subregister extraction copy.
           SrcMO.setReg(NewVReg);