private void EmitCondBranchForSwitch(ILOpCode branchCode, ConstantValue constant, object targetLabel)
{
Debug.Assert(branchCode.IsBranchToLabel());
Debug.Assert(constant != null &&
SwitchConstantValueHelper.IsValidSwitchCaseLabelConstant(constant));
Debug.Assert(targetLabel != null);
// ldloc key
// ldc constant
// branch branchCode targetLabel
_builder.EmitLoad(_key);
_builder.EmitConstantValue(constant);
_builder.EmitBranch(branchCode, targetLabel, GetReverseBranchCode(branchCode));
}