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<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black">Hello LLVM-Dev,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black">I understand that Uses and Defs are for implicit registers. Uses is defined as for using non-operand registers and Defs is defined as for modifying non-operand registers.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black">For example, for compare and compare with carry instructions, is my understanding correct that the instructions should be defined as described below?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black">Considering that the carry flag is part of the status register:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black">Compare – The status register is only listed in the Defs register list since it modifies the status register.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black">Compare with carry – The status register is listed in both Defs and Uses register lists since it refers the status register (Carry flag information) and modifies it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black">With this understanding, am I correct to assume that all “with carry” instructions lists the status register in the Uses? The status register being listed in the Defs depends
on whether the instruction modifies the status register or not.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black">Thank you in advance for your responses, they are highly appreciated.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black">Sincerely,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Meiryo UI","sans-serif";color:black">Miguel Inigo J. Manalac (1852)<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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