MachineInstr: Change return value of getOpcode() to unsigned.

This was previously returning int. However there are no negative opcode
numbers and more importantly this was needlessly different from
MCInstrDesc::getOpcode() (which even is the value returned here) and
SDValue::getOpcode()/SDNode::getOpcode().

llvm-svn: 237611

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp b/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
index 8dbd9df32b7..90598852b5e 100644
--- a/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
@@ -423,7 +423,7 @@ static MachineInstr *getDef(unsigned Reg,
 }
 
 // Return true if MI is a shift of type Opcode by Imm bits.
-static bool isShift(MachineInstr *MI, int Opcode, int64_t Imm) {
+static bool isShift(MachineInstr *MI, unsigned Opcode, int64_t Imm) {
   return (MI->getOpcode() == Opcode &&
           !MI->getOperand(2).getReg() &&
           MI->getOperand(3).getImm() == Imm);