https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105376
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jsm28 at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(gdb) p debug_rtx (rtl)
(const_double:TD -2.0e+0 [-0x0.8p+2])
but CONST_DOUBLE_REAL_VALUE (rtl) has ->recimal == false, and that's true even
on
the tree level. Generated by
/* Convert x+x into x*2. */
(simplify
(plus @0 @0)
(if (SCALAR_FLOAT_TYPE_P (type))
(mult @0 { build_real (type, dconst2); })
(if (INTEGRAL_TYPE_P (type))
(mult @0 { build_int_cst (type, 2); }))))
where indeed the dconst2 is not decimal. I have no idea how to create a DFP
constant, but I guess that in priciple (at least for dconst2), creating
the constant with double_type_node and then fold-converting to type might work?
It just looks like a bit much of work ...
Joseph, do you have any insights here? The above is of course copied from
fold-const.cc originally.
