-fomit-frame-pointer is pretty high on the list of most destructive micro-optimizations in the history of open source. When you repurpose the backtrace pointer

-fomit-frame-pointer is pretty high on the list of most destructive micro-optimizations in the history of open source. When you repurpose the backtrace pointer (RBP) for other things, it totally savages our ability to have native backtraces Funny. I always learned that the *BP registers stood for Base Pointer and not Backtrace. And then I would use BP to reference function temp variables from that part of the call frame. The Intel “ASM86 Language Reference Manual” calls it that as well. https://community.intel.com/cipcp26785/attachments/cipcp26785/c-compiler/31103/1/121703-003_ASM86_Language_Reference_Manual_Nov83.pdf https://community.intel.com/cipcp26785/attachments/cipcp2678...