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Optimize ADDE/ADDC/SUBE/SUBC #77

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jbush001 opened this issue Jun 23, 2017 · 1 comment

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minor performance

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jbush001 commented Jun 23, 2017

Currently these use branches, which are unnecessary. Grab carry from the comparison result register. Implement in NyuziISelLowering.

jbush001 added minor performance labels

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jbush001 commented Jun 24, 2017

ADDC/SUBC are being phased out in favor for ADDCARRY and SUBCARRY, need to consider those too.

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