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[Bug rtl-optimization/69447] [5/6 Regression] wrong code with -O2 -fno-schedule-insns and mixed 8/16/32/64bit arithmetics @ armv7a
- From: "rth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 27 Jan 2016 03:49:28 +0000
- Subject: [Bug rtl-optimization/69447] [5/6 Regression] wrong code with -O2 -fno-schedule-insns and mixed 8/16/32/64bit arithmetics @ armv7a
- Auto-submitted: auto-generated
- References: <bug-69447-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69447
Richard Henderson <rth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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.