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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/109347] [lra] Spill failure for architecture without
 CC
Date: Thu, 30 Mar 2023 19:47:19 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109347

--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Even for pre-LRA with reload in GCC 4.7.0:
t.c: In function =E2=80=98f=E2=80=99:
t.c:91:1: note: unable to find a register to spill in class =E2=80=98GR_REG=
S=E2=80=99
t.c:91:1: note: this is the insn:
(insn 33 32 34 2 (set (reg:DI 198)
        (plus:DI (reg:DI 194 [ t9.0 ])
            (const_int 1 [0x1]))) t.c:60 11 {*adddi3}
     (expr_list:REG_DEAD (reg:DI 194 [ t9.0 ])
        (nil)))
t.c:91:1: internal compiler error: in spill_failure, at reload1.c:2120
unrecognized DWARF version in .debug_info at 6
0x70e2bf _fatal_insn
        /bajas/pinskia/src/toolchain-47/scripts/../src/gcc/rtl-error.c:106
0x705bab spill_failure
        /bajas/pinskia/src/toolchain-47/scripts/../src/gcc/reload1.c:2120
0x705bab find_reload_regs
        /bajas/pinskia/src/toolchain-47/scripts/../src/gcc/reload1.c:2046
0x705bab select_reload_regs
        /bajas/pinskia/src/toolchain-47/scripts/../src/gcc/reload1.c:2066
0x705bab reload
        /bajas/pinskia/src/toolchain-47/scripts/../src/gcc/reload1.c:993
0x65fe6e do_reload
        /bajas/pinskia/src/toolchain-47/scripts/../src/gcc/ira.c:3733
0x65fe6e rest_of_handle_reload
        /bajas/pinskia/src/toolchain-47/scripts/../src/gcc/ira.c:3824
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.

So I am sure this is almost not a regression.=