https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93235
Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|target |rtl-optimization
--- Comment #4 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Looks to be generic expansion code that is running amok.
#0 fancy_abort (
file=0x232c400 "/home/rearnsha/gnusrc/gcc-cross/master/gcc/emit-rtl.c",
line=1021,
function=0x232d608 <gen_rtx_SUBREG(machine_mode, rtx_def*, poly_int<2u,
unsigned long>)::__FUNCTION__> "gen_rtx_SUBREG")
at /home/rearnsha/gnusrc/gcc-cross/master/gcc/diagnostic.c:1768
#1 0x0000000000c7fc9f in gen_rtx_SUBREG (mode=E_SImode, reg=0x7ffff630bcc0,
offset=...) at /home/rearnsha/gnusrc/gcc-cross/master/gcc/emit-rtl.c:1021
#2 0x0000000000cb3bcb in store_bit_field_using_insv (insv=0x7fffffffced0,
op0=0x7ffff630bee8, op0_mode=..., bitsize=16, bitnum=0,
value=0x7ffff630bed0, value_mode=...)
at /home/rearnsha/gnusrc/gcc-cross/master/gcc/expmed.c:630
#3 0x0000000000cb6031 in store_integral_bit_field (op0=0x7ffff630bee8,
op0_mode=..., bitsize=16, bitnum=0, bitregion_start=...,
bitregion_end=..., fieldmode=E_HImode, value=0x7ffff630bed0,
reverse=false, fallback_p=true)
at /home/rearnsha/gnusrc/gcc-cross/master/gcc/expmed.c:1050
#4 0x0000000000cb5430 in store_bit_field_1 (str_rtx=0x7ffff630bcc0,
bitsize=..., bitnum=..., bitregion_start=..., bitregion_end=...,
fieldmode=E_HImode, value=0x7ffff630bed0, reverse=false, fallback_p=true)
at /home/rearnsha/gnusrc/gcc-cross/master/gcc/expmed.c:870
#5 0x0000000000cb6a9a in store_bit_field (str_rtx=0x7ffff630bcc0,
bitsize=..., bitnum=..., bitregion_start=..., bitregion_end=...,
fieldmode=E_HImode, value=0x7ffff630bed0, reverse=false)
at /home/rearnsha/gnusrc/gcc-cross/master/gcc/expmed.c:1177
#6 0x0000000000cea57a in store_field (target=0x7ffff630bcc0, bitsize=...,
bitpos=..., bitregion_start=..., bitregion_end=..., mode=E_HImode,
exp=0x7ffff64cab88, alias_set=0, nontemporal=false, reverse=false)
at /home/rearnsha/gnusrc/gcc-cross/master/gcc/expr.c:7192
#7 0x0000000000ce1ba2 in expand_assignment (to=0x7ffff63090f0,
from=0x7ffff64cab88, nontemporal=false)
at /home/rearnsha/gnusrc/gcc-cross/master/gcc/expr.c:5369
#8 0x0000000000b552d8 in expand_gimple_stmt_1 (stmt=0x7ffff62df960)
at /home/rearnsha/gnusrc/gcc-cross/master/gcc/cfgexpand.c:3749
#9 0x0000000000b556c7 in expand_gimple_stmt (stmt=0x7ffff62df960)
at /home/rearnsha/gnusrc/gcc-cross/master/gcc/cfgexpand.c:3847
#10 0x0000000000b5e295 in expand_gimple_basic_block (bb=0x7ffff62cf138,
disable_tail_calls=false)
...
Also fails if __fp16 is changed to _Float16.
