http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43546
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |uros at gcc dot gnu.org
--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yet another option, perhaps better, would be to add a new predicate, that would
return true for a MEM operand for which avoid_constant_pool_reference returns a
CONST_DOUBLE floating point constant (other than signalling NaN?), and add
another define_insn before *extendsfdf2_i387 that would use that predicate on
the second operand and would do what *extendsfdf2_i387 does, but have also a
"=x", "m" alternative that would be later on split into a load of the constant
widened to DFmode in memory. Then we should get better code when trying to
load a DFmode constant into a DFmode register and compress_float_constant
decided to compress it, while it isn't a win in the end.
Or both my patch and this change.
