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<div class="moz-cite-prefix">On 06/10/2014 08:13 PM, Pete Cooper
wrote:<br>
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<div>On Jun 10, 2014, at 6:49 PM, reed kotler <<a
moz-do-not-send="true" href="mailto:rkotler@mips.com">rkotler@mips.com</a>>
wrote:</div>
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<div class="moz-cite-prefix">On 06/10/2014 05:51 PM, Pete
Cooper wrote:<br>
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cite="mid:94E68AF7-A526-4A77-8FC9-58DB5F3F5E22@apple.com"
type="cite"> Hi Reed
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<div>You can do this on the instruction itself by telling
it 2 operands must be the same register. For example,
from X86:</div>
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<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">let Constraints = "$src1 = $dst" in</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;"> defm INSERTPS : SS41I_insertf32<0x21,
"insertps">;</div>
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Menlo;"><br>
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<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">Thanks,</div>
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Hi Pete,<br>
<br>
Sorry.<br>
<br>
I should have been more specific.<br>
<br>
I'm looking for a way to do this in c++.<br>
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Ah, in that case have a look at MachineInstr::tieOperands.</div>
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<div>Thanks,</div>
<div>Pete<br>
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That did the trick. Thanks.<br>
<br>
Reed<br>
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I'm aware of how it is done in tablegen.<br>
<br>
Reed<br>
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<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">Pete</div>
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<div>On Jun 10, 2014, at 5:38 PM, reed kotler <<a
moz-do-not-send="true"
href="mailto:rkotler@mips.com">rkotler@mips.com</a>>
wrote:</div>
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<div>Does anyone know if there is a way to constrain
two virtual registers to be allocated<br>
to the same physical register?<br>
<br>
Tia.<br>
<br>
Reed<br>
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