https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69614
ktkachov at gcc dot gnu.org changed:
What |Removed |Added
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CC| |vmakarov at redhat dot com
--- Comment #11 from ktkachov at gcc dot gnu.org ---
I think this is a regalloc bug.
I tried reducing the number of RTL passes needed to trigger this and I can
disable pretty much every disable-able post-reload pass and still trigger this.
So the bug still triggers with:
-Os -fno-expensive-optimizations -fschedule-insns -mtpcs-leaf-frame
-fira-algorithm=priority -march=armv7-a -mfloat-abi=hard -marm -mfpu=vfpv4
-mtune=cortex-a8 -fno-schedule-insns2 -fno-cprop-registers -fno-if-conversion2
-fno-dse -fno-reorder-blocks -fno-reorder-blocks-and-partition
-fno-auto-inc-dec -fno-if-conversion
Disabling various pre-reload passes leads to changes in register pressure that
end up affecting IRA/LRA and end up masking the bug
