https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127142
--- Comment #1 from John David Anglin <danglin at gcc dot gnu.org> ---
The problem is we have two overlapping ranges where the r1 register
is needed. Although the insns to load a symbol_ref are originally
emitted as a high/losum pair, RTL optimization can rearrange the pair
so they are no longer adjacent.
Somehow old reload handled this, but LRA can't.
********** Assignment #13: **********
Assigning to 863 (cl=R1_REGS, orig=863, freq=3, tfirst=863,
tfreq=3)...
2nd iter for reload pseudo assignments:
Reload r863 assignment failure
Spill r233(hr=4, freq=3)
Spill r238(hr=3, freq=3)
Spill r276(hr=6, freq=1975)
Spill r355(hr=14, freq=108)
Spill r499(hr=21, freq=2)
Spill r737(hr=9, freq=1133)
Spill r738(hr=5, freq=2117)
Spill r739(hr=11, freq=217)
Spill r742(hr=12, freq=217)
Spill r743(hr=7, freq=218)
Spill r745(hr=13, freq=217)
Spill r746(hr=18, freq=217)
Spill r748(hr=8, freq=1166)
Spill r749(hr=10, freq=251)
Spill reload r815(hr=1, freq=3)
Spill inheritance r853(hr=3, freq=3)
Spill inheritance r855(hr=4, freq=3)
Spill inheritance r857(hr=15, freq=3)
Assigning to 815 (cl=R1_REGS, orig=815, freq=3, tfirst=815,
tfreq=3)...
Assign 1 to reload r815 (freq=3)
Assigning to 863 (cl=R1_REGS, orig=863, freq=3, tfirst=863,
tfreq=3)...
Assigning to 853 (cl=GENERAL_REGS, orig=238, freq=3, tfirst=853,
tfreq=3)...
Assign 3 to inheritance r853 (freq=3)
Assigning to 855 (cl=GENERAL_REGS, orig=233, freq=3, tfirst=855,
tfreq=3)...
Assign 4 to inheritance r855 (freq=3)
Assigning to 857 (cl=GENERAL_REGS, orig=150, freq=3, tfirst=857,
tfreq=3)...
Assign 5 to inheritance r857 (freq=3)
Improving inheritance for 852(15) and 857(5)...
Assign 15 to inheritance r857 (freq=3)
Reassigning non-reload pseudos
Assign 5 to r738 (freq=2117)
Assign 6 to r276 (freq=1975)
Assign 8 to r748 (freq=1166)
Assign 9 to r737 (freq=1133)
Assign 10 to r749 (freq=251)
Assign 7 to r743 (freq=218)
Assign 11 to r739 (freq=217)
Assign 12 to r742 (freq=217)
Assign 13 to r745 (freq=217)
Assign 18 to r746 (freq=217)
Assign 14 to r355 (freq=108)
Assign 4 to r233 (freq=3)
Assign 3 to r238 (freq=3)
Assign 21 to r499 (freq=2)
****** Splitting a hard reg after assignment #13: ******
