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<p>Hi, <br>
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<p>I'm currently writing a backend for a specific platform. On the target platform, "add/sub" always write a flag result. I used SDNode pattern "add/sub" for these two instructions, however this leading to a wrongly code as follows,</p>
<p><br>
cmp</p>
<p>...</p>
<p>add ...</p>
<p>...</p>
<p>beq</p>
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<p>"add" changes the flag. Desired code is:</p>
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<p>add...<br>
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<p>cmp</p>
<p>... ;No add/sub</p>
<p>beq</p>
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<p>Then I tried to use SDNode pattern "addc/subc" instead, but it doesn't matter and cause some other errors. What should I do to generate code that no "add/sub" between "cmp" and "branch"?<br>
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