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2025-09-01: Let's write a peephole optimizer for QBE's arm64 backend

Brian Callahan · published 1 September 2025

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https://briancallahan.net/blog/
briancallahan.net
2025-08-17: Despite thoughts to the contrary, GNAT (Ada) is in fact fully supported on illumos Read at the source ↗
briancallahan.net
2025-12-16: Let's run FreeBSD 15.0-RELEASE on a Raspberry Pi Zero 2 W Read at the source ↗
briancallahan.net
https://github.com/ibara/O
github.com
2022-03-30: I wrote a peephole optimizer (for QBE), part 1 Read at the source ↗
briancallahan.net
2022-04-02: I wrote a simple, explainable, peephole optimizer (for cproc and QBE), part 2 Read at the source ↗
briancallahan.net
2022-04-17: I wrote a peephole optimizer (for QBE), part 3: Studying the LLVM and GCC optimizers Read at the source ↗
briancallahan.net
https://en.wikipedia.org/wiki/Peephole_optimization
en.wikipedia.org
https://c9x.me/compile/
c9x.me
https://en.wikipedia.org/wiki/C_(programming_language
en.wikipedia.org
https://c9x.me/compile/doc/il.html
c9x.me
https://en.wikipedia.org/wiki/Executable_and_Linkable_Format
en.wikipedia.org
https://en.wikipedia.org/wiki/Mach-O
en.wikipedia.org
https://github.com/ibara/4q
github.com
https://developer.arm.com/documentation/dui0802/b/A64-General-Instructions/MOV--to-or-from-SP-?lang=en
developer.arm.com
https://developer.arm.com/documentation/dui0802/b/A64-General-Instructions/MOV--register-?lang=en
developer.arm.com