[Bug target/87883] [ARM] ICE: Segmentation fault in arm_regno_class
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87883 Mihail Ionescu changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |WONTFIX --- Comment #3 from Mihail Ionescu --- Hi Jozeph, I will close it for now. I had a look at your patch and even if the segfault is fixed, it won't work unless arm_active_target.isa is initialised beforehand which does not seem to be possible without making some major changes. Best regards, Mihail
[Bug target/87883] [ARM] ICE: Segmentation fault in arm_regno_class
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87883 --- Comment #2 from Jozef Lawrynowicz --- Created attachment 45074 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45074=edit reg class checking patch Hi Mihail, Thanks for the info. I fixed a bug for msp430-elf caused by REGNO_REG_CLASS and REG_CLASS_CONTENTS being out of sync i.e. REGNO_REG_CLASS[reg] reported one class, but the bit for that reg in that class was not set in REG_CLASS_CONTENTS. So I was trying to add some generic warning to the middle-end which would catch these cases for other targets (see attached patch). However, there were some other issues with my proposal so I've parked it for now. Given that I'm not going to proceed with my patch in its current state, it's up to you whether to close this PR or not. Kind regards, Jozef
[Bug target/87883] [ARM] ICE: Segmentation fault in arm_regno_class
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87883 --- Comment #1 from Mihail Ionescu --- Hi Jozef, The issue is indeed there on trunk/gcc-8/gcc-7, but it is expected. It is caused by the fact that the "arm_active_target.isa" bitmap is not initialised by the time "init_reg_sets" is called. This can be fixed by checking if it is initialised or not in the arm backend, but it is not ideal, as arm_regno_class (REGNO_REG_CLASS) is not supposed to be queried at that time. What exactly is your patch trying to do? Is there any way of working around this within your patch? Best regards, Mihail
[Bug target/87883] [ARM] ICE: Segmentation fault in arm_regno_class
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87883 Thomas Preud'homme changed: What|Removed |Added Status|UNCONFIRMED |ASSIGNED Last reconfirmed||2018-11-22 CC||thopre01 at gcc dot gnu.org Assignee|unassigned at gcc dot gnu.org |mihail.ionescu at arm dot com Ever confirmed|0 |1
