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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/99355] -freal-X-real-Y -freal-Z-real-X promotes Z to Y
Date: Thu, 04 Mar 2021 14:41:49 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99355

--- Comment #13 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I have changed the test in pr57871 comment 0 to

implicit none
integer,parameter:: p1 =3D 4, dp =3D kind(1d0)
print *,'kind(1.0_4) ',kind(1.0_4),'precision(1.0_4) ',precision(1.0_4)
print *,'kind(1.0_p1)',kind(1.0_p1),'precision(1.0_p1)',precision(1.0_p1)
print *,'kind(1.0_dp)',kind(1.0_dp),'precision(1.0_dp)',precision(1.0_dp)
end

Before r11-7501 (r11-7474) the output with -freal-4-real-16 is

 kind(1.0_4)           16 precision(1.0_4)           33
 kind(1.0_p1)          16 precision(1.0_p1)          33
 kind(1.0_dp)           8 precision(1.0_dp)          15

after (r11-7502) it is

 kind(1.0_4)            4 precision(1.0_4)            6
 kind(1.0_p1)           4 precision(1.0_p1)           6
 kind(1.0_dp)           8 precision(1.0_dp)          15

It is not the result I expect.=