[Bug rtl-optimization/69447] [5/6 Regression] wrong code with -O2 -fno-schedule-insns and mixed 8/16/32/64bit arithmetics @ armv7a

[rth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69447

Richard Henderson <rth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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             Status|NEW                         |ASSIGNED

--- Comment #8 from Richard Henderson <rth at gcc dot gnu.org> ---
Further archaeology suggests that PR 66424 is related,
and had an incomplete fix applied.

The fix for PR 66424 prevents an insn being moved if
it contains a subreg of a multi-word pseudo.  But the
same problem exists if one moves a complete multi-word
pseudo if any of its subregs have ever been accessed.