[Bug inline-asm/62144] "Frame pointer required, but reserved" error with -fomit-frame-pointer but only with -m32 -O2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62144 coypu changed: What|Removed |Added CC||coypu at sdf dot org --- Comment #10 from coypu --- fyi, if you are considering this a bug, I can still reproduce it with trunk as of gcc (GCC) 9.0.0 20181125
[Bug inline-asm/62144] Frame pointer required, but reserved error with -fomit-frame-pointer but only with -m32 -O2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62144 Jakub Jelinek jakub at gcc dot gnu.org changed: What|Removed |Added CC||jakub at gcc dot gnu.org --- Comment #7 from Jakub Jelinek jakub at gcc dot gnu.org --- I'd note that -fomit-frame-pointer is never a guarantee that frame pointer will be omitted, there are still tons of cases where it can't be omitted, VLAs, alloca, various specialized builtins, etc.
[Bug inline-asm/62144] Frame pointer required, but reserved error with -fomit-frame-pointer but only with -m32 -O2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62144 --- Comment #8 from Łukasz Kucharski luk32 at o2 dot pl --- Jakub, fair enough. However, changing the optimization level should not break the compilation. The issue is, at least for me, is not that we can't omit the frame pointer, but that it depends on the optimization level. I couldn't find anything in the docs, which would allow such behaviour. Maybe I missed it. Anyway, IMO at most a warning should be issued that a potential optimization conflicts with the flag. With regards, luk32.
[Bug inline-asm/62144] Frame pointer required, but reserved error with -fomit-frame-pointer but only with -m32 -O2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62144 --- Comment #9 from Jakub Jelinek jakub at gcc dot gnu.org --- The documentation on -fomit-frame-pointer says: Don't keep the frame pointer in a register for functions that don't need one. where whether soemthing needs a frame pointer or not is not precisely defined (exactly because the actual check in the compiler whether something needs a frame pointer or not is not really something simple, and depends on many things). Whether we can avoid frame pointer on this exact testcase is something Vlad can perhaps look at, my answer was just general.
[Bug inline-asm/62144] Frame pointer required, but reserved error with -fomit-frame-pointer but only with -m32 -O2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62144 Łukasz Kucharski luk32 at o2 dot pl changed: What|Removed |Added CC||luk32 at o2 dot pl --- Comment #5 from Łukasz Kucharski luk32 at o2 dot pl --- Created attachment 33833 -- https://gcc.gnu.org/bugzilla/attachment.cgi?id=33833action=edit Example program that fails compilation with optimization enabled.
[Bug inline-asm/62144] Frame pointer required, but reserved error with -fomit-frame-pointer but only with -m32 -O2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62144 --- Comment #6 from Łukasz Kucharski luk32 at o2 dot pl --- Comment on attachment 33833 -- https://gcc.gnu.org/bugzilla/attachment.cgi?id=33833 Example program that fails compilation with optimization enabled. Hello, I believe we run into the same problem, however we extracted example that doesn't need `-m32`. Just `-O2` breaks the build. gcc-4.8 passed with no problems. With regards, luk32.
[Bug inline-asm/62144] Frame pointer required, but reserved error with -fomit-frame-pointer but only with -m32 -O2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62144 --- Comment #3 from Vladimir Makarov vmakarov at gcc dot gnu.org --- (In reply to Brooks Moses from comment #2) Ping? Any updates on this? Sorry, I'll look at this in a week or if I am lucky this week. Right now, I am quite busy with register rematerialization pass in LRA which I'd like to make ready for gcc-5.0.
[Bug inline-asm/62144] Frame pointer required, but reserved error with -fomit-frame-pointer but only with -m32 -O2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62144 --- Comment #4 from Brooks Moses brooks at gcc dot gnu.org --- Thanks. I have to admit that that does seem more generally useful! :)
[Bug inline-asm/62144] Frame pointer required, but reserved error with -fomit-frame-pointer but only with -m32 -O2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62144 --- Comment #2 from Brooks Moses brooks at gcc dot gnu.org --- Ping? Any updates on this?
[Bug inline-asm/62144] Frame pointer required, but reserved error with -fomit-frame-pointer but only with -m32 -O2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62144 Richard Biener rguenth at gcc dot gnu.org changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed||2014-08-15 CC||vmakarov at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #1 from Richard Biener rguenth at gcc dot gnu.org --- frame_pointer_needed is set by setup_can_eliminate. Which means that desipte -fomit-frame-pointer IRA is not able to eliminate the frame pointer? Vlad?
