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d0de68c41b
We can merge an SXTW with the SUB, eliminating one instruction. In addition, it is no longer necessary to allocate a temporary register, reducing register pressure. Before: 0x93407f59 sxtw x25, w26 0x93407ebb sxtw x27, w21 0xcb1b033b sub x27, x25, x27 After: 0x93407f5b sxtw x27, w26 0xcb35c37b sub x27, x27, w21, sxtw