This is the mail archive of the gcc-bugs@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

[Bug target/69773] gcc ICE at -O2 and above on valid code on x86_64-linux-gnu in "assign_by_spills"


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69773

--- Comment #2 from Qirun Zhang <helloqirun at gmail dot com> ---
pr65693 fails to compile at -O0 with the same (similar) trace.

$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 6.0.0 20160226 (experimental) [trunk revision 233763] (GCC) 



$ gcc-trunk pr65693.c 
pr65693.c: In function 'foo':
pr65693.c:13:1: error: unable to find a register to spill
 }
 ^
pr65693.c:13:1: error: this is the insn:
(insn 11 35 12 2 (parallel [
            (set (reg:DI 96)
                (udiv:DI (reg:DI 94)
                    (reg:DI 106)))
            (set (reg:DI 107 [97])
                (umod:DI (reg:DI 94)
                    (reg:DI 106)))
            (clobber (reg:CC 17 flags))
        ]) pr65693.c:10 358 {*udivmoddi4}
     (expr_list:REG_UNUSED (reg:DI 107 [97])
        (expr_list:REG_DEAD (reg:DI 106)
            (expr_list:REG_DEAD (reg:DI 94)
                (expr_list:REG_UNUSED (reg:CC 17 flags)
                    (nil))))))
pr65693.c:13:1: internal compiler error: in assign_by_spills, at
lra-assigns.c:1417
0xaf9138 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        ../../gcc/gcc/rtl-error.c:108
0x9f4515 assign_by_spills
        ../../gcc/gcc/lra-assigns.c:1417
0x9f4bc3 lra_assign()
        ../../gcc/gcc/lra-assigns.c:1590
0x9f064b lra(_IO_FILE*)
        ../../gcc/gcc/lra.c:2331
0x9a76f9 do_reload
        ../../gcc/gcc/ira.c:5396
0x9a76f9 execute
        ../../gcc/gcc/ira.c:5567
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]