This small patch to rs6000_rtx_costs considerably improves code
generated for large constants in 64-bit code, teaching gcc that it is
better to load a constant from memory than to generate a sequence of
up to five dependent instructions. Note that the rs6000 backend does
generate large constants a
On Tue, Sep 15, 2020 at 10:49:43AM +0930, Alan Modra wrote:
> This small patch to rs6000_rtx_const considerably improves code
(_costs)
> generated for large constants in 64-bit code, teaching gcc that it is
> better to load a constant from memory than to generate a sequence of
> up to five depend
This small patch to rs6000_rtx_const considerably improves code
generated for large constants in 64-bit code, teaching gcc that it is
better to load a constant from memory than to generate a sequence of
up to five dependent instructions. Note that the rs6000 backend does
generate large constants a
