[11/77] Add a float_mode_for_size helper function
This provides a type-safe way to ask for a float mode and get it as a scalar_float_mode. 2017-08-30 Richard Sandiford <richard.sandiford@linaro.org> Alan Hayward <alan.hayward@arm.com> David Sherwood <david.sherwood@arm.com> gcc/ * coretypes.h (opt_scalar_float_mode): New typedef. * machmode.h (float_mode_for_size): New function. * emit-rtl.c (double_mode): Delete. (init_emit_once): Use float_mode_for_size. * stor-layout.c (layout_type): Likewise. * gdbhooks.py (build_pretty_printer): Handle opt_scalar_float_mode. Co-Authored-By: Alan Hayward <alan.hayward@arm.com> Co-Authored-By: David Sherwood <david.sherwood@arm.com> From-SVN: r251463
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