1

I am going through the machine description file for ARM target in GCC. And while looking into it i found that the peephole definition(define_peephole2) it support is peephole2 and not the peephole.

So could some please let me know the difference between peephole and peephole2?

Evan Carroll
  • 78,363
  • 46
  • 261
  • 468
geek
  • 47
  • 1
  • 9

1 Answers1

1

The difference is when that optimization pass happens. A brief description: https://gcc.gnu.org/onlinedocs/gccint/Peephole-Definitions.html

Vladimír Čunát
  • 225
  • 2
  • 9