[Bug target/82248] probe_stack can generate unpredictable STR on arm

rguenth at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Thu Nov 23 08:18:00 GMT 2017


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82248

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |rguenth at gcc dot gnu.org
           See Also|                            |https://bugzilla.suse.com/s
                   |                            |how_bug.cgi?id=1068967

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Miscompiles mpfr for us on armv7.  Isn't it easy enough to handle this in
the insn pattern by using some non pre/post-indexed memory_operand predicate
and or using an early clobbered match_scratch to allocate 'r0'?


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