https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64905
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
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CC| |law at redhat dot com
Component|target |rtl-optimization
--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
It looks the failure is due to:
emit-rtl.c: REGNO_POINTER_ALIGN (HARD_FRAME_POINTER_REGNUM) = STACK_BOUNDARY;
The testcase forces the pointer to %rbp (== HARD_FRAME_POINTER_REGNUM in the
above line), so the predicate thinks that the value in %rbp is aligned, since
%rbp has its REGNO_POINTER_ALIGN set to STACK_BOUNDARY.
Looks like generic RTL infrastructure problem to me, the
REGNO_POINTER_ALIGNMENT of hard_frame_pointer should be cleared when H_F_P is
omitted and reused.
