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[Bug target/53513] [SH] Add support for fschg and fpchg insns and improve fenv support


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53513

Oleg Endo <olegendo at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #33716|0                           |1
        is obsolete|                            |

--- Comment #24 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Created attachment 33717
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33717&action=edit
Using virtual FPSCR registers to model insn dependencies

sh_emit_set_t_insn was producing nested parallel patterns.

When compiling libgcc (for -m4 -mb) memory consumption goes up a lot.  Either
there is a bug in the patch, or it's triggering a bug somewhere else which
seems to cause an infinite alloc cycle somewhere.


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