Re: Question about information from -fdump-rtl-sched2 on M1 Max

2024-04-29 Thread Lucier, Bradley J via Gcc
That should be 4 cycles per loop, sorry. > On Apr 29, 2024, at 7:24 PM, Lucier, Bradley J wrote: > > Specifically, a tight loop that was reported to be scheduled in 23 cycles (as > I understand it) actually executes in a little over 2 cycles per loop

Question about information from -fdump-rtl-sched2 on M1 Max

2024-04-29 Thread Lucier, Bradley J via Gcc
The question: How to interpret scheduling info with the compiler listed below. Specifically, a tight loop that was reported to be scheduled in 23 cycles (as I understand it) actually executes in a little over 2 cycles per loop, as I interpret two separate experiments. Am I misinterpreting somet

Re: Need help debugging possible 10.3 bad code generation regression from 10.2/9.3 on Mac OS 10.15.7 (Catalina)

2021-04-20 Thread Lucier, Bradley J via Gcc
On Apr 20, 2021, at 9:11 AM, Gabriel Paubert mailto:paub...@iram.es>> wrote: (lldb) di -s 0x000103d6 -c 10 libgambit.dylib`___SCMOBJ_to_NONNULLSTRING: 0x103d6 <+1504>: jl 0x103d60026 ; <+1542> at c_intf.c:3282:9 0x103d60002 <+1506>: orb%al, 0x31(%rbp) 0

Need help debugging possible 10.3 bad code generation regression from 10.2/9.3 on Mac OS 10.15.7 (Catalina)

2021-04-20 Thread Lucier, Bradley J via Gcc
I’m seeing an “Illegal Instruction” fault and don’t quite know how to generate a proper bug report yet. This is the compiler: [Bradleys-Mac-mini:~] lucier% /usr/local/gcc-10.3.0/bin/gcc -v Using built-in specs. COLLECT_GCC=/usr/local/gcc-10.3.0/bin/gcc COLLECT_LTO_WRAPPER=/usr/local/gcc-10.3.0/l