https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115297
Bug ID: 115297
Summary: [14 regression] alpha: ICE in simplify_subreg, at
simplify-rtx.cc:7554 with -O1
Product: gcc
Version: 14.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: matoro_gcc_bugzilla at matoro dot tk
Target Milestone: ---
Target: alpha-unknown-linux-gnu
Created attachment 58314
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58314&action=edit
gdb context and complete backtrace
Found this while building kernel with gcc-14. This reproduces on cross, so
using that as an example.
Minimized:
enum { BPF_F_USER_BUILD_ID } __bpf_get_stack_size;
long __bpf_get_stack_flags, bpf_get_stack___trans_tmp_2;
void bpf_get_stack() {
unsigned elem_size;
int err = elem_size = __bpf_get_stack_flags ?: sizeof(long);
if (__builtin_expect(__bpf_get_stack_size % elem_size, 0))
bpf_get_stack___trans_tmp_2 = err;
}
$ alpha-unknown-linux-gnu-gcc-14 -O1 -c stackmap.i
during RTL pass: combine
stackmap.i: In function ‘bpf_get_stack’:
stackmap.i:8:1: internal compiler error: in simplify_subreg, at
simplify-rtx.cc:7554
8 | }
| ^
Backtrace summary (more detailed bt with locals and snippets in attachment):
#0 internal_error (gmsgid=0x1033e41b0 "in %s, at %s:%d") at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/diagnostic.cc:2227
#1 0x0000000102ff9cac in fancy_abort (file=0x103272d20
"/var/tmp/portage/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/work/gcc-14-20240518/gcc/simplify-rtx.cc",
line=7554,
function=0x1032731f0 "simplify_subreg") at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/diagnostic.cc:2353
#2 0x00000001017b5ea4 in simplify_context::simplify_subreg
(this=0x7fffffff9f00, outermode=E_DImode, op=0x7ffff5448c28,
innermode=E_SImode, byte=...)
at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/simplify-rtx.cc:7554
#3 0x00000001017b8da8 in simplify_context::simplify_subreg
(this=0x7fffffff9f00, outermode=E_DImode, op=0x7ffff5449ff0,
innermode=E_SImode, byte=...)
at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/simplify-rtx.cc:7804
#4 0x00000001017b988c in simplify_context::simplify_gen_subreg
(this=0x7fffffff9f00, outermode=E_DImode, op=0x7ffff5449ff0,
innermode=E_SImode, byte=...)
at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/simplify-rtx.cc:7875
#5 0x0000000100bb6224 in simplify_gen_subreg (outermode=E_DImode,
op=0x7ffff5449ff0, innermode=E_SImode, byte=...)
at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/rtl.h:3552
#6 0x00000001028f87dc in if_then_else_cond (x=0x7ffff5449f60,
ptrue=0x7fffffffa528, pfalse=0x7fffffffa538)
at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/combine.cc:9423
#7 0x00000001028f55ec in if_then_else_cond (x=0x7ffff5449f78,
ptrue=0x7fffffffa948, pfalse=0x7fffffffa958)
at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/combine.cc:9286
#8 0x00000001028f55ec in if_then_else_cond (x=0x7ffff5449f90,
ptrue=0x7fffffffb148, pfalse=0x7fffffffb150)
at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/combine.cc:9286
#9 0x00000001028bf07c in combine_simplify_rtx (x=0x7ffff5449f90,
op0_mode=E_VOIDmode, in_dest=false, in_cond=false)
at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/combine.cc:5758
#10 0x00000001028bc3d8 in subst (x=0x7ffff5449f90, from=0x7ffff54488c8,
to=0x7ffff5451920, in_dest=false, in_cond=false, unique_copy=false)
at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/combine.cc:5619
#11 0x00000001028bba88 in subst (x=0x7ffff5448cb8, from=0x7ffff54488c8,
to=0x7ffff5451920, in_dest=false, in_cond=false, unique_copy=false)
at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/combine.cc:5546
#12 0x00000001028babe8 in subst (x=0x7ffff54a68a0, from=0x7ffff54488c8,
to=0x7ffff5451920, in_dest=false, in_cond=false, unique_copy=false)
at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/combine.cc:5480
#13 0x000000010289ba0c in try_combine (i3=0x7ffff54e0540, i2=0x7ffff54e0500,
i1=0x7ffff54e06c0, i0=0x0, new_direct_jump_p=0x7fffffffe2df,
last_combined_insn=0x7ffff54e0540)
at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/combine.cc:3349
#14 0x000000010288c22c in combine_instructions (f=0x7ffff54009a0, nregs=88) at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/combine.cc:1285
#15 0x0000000102933030 in rest_of_handle_combine () at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/combine.cc:15114
#16 0x00000001029331d0 in (anonymous namespace)::pass_combine::execute
(this=0x103922900) at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/combine.cc:15158
#17 0x000000010150c264 in execute_one_pass (pass=0x103922900) at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/passes.cc:2647
#18 0x000000010150c7c4 in execute_pass_list_1 (pass=0x103922900) at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/passes.cc:2756
#19 0x000000010150c80c in execute_pass_list_1 (pass=0x103921d60) at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/passes.cc:2757
#20 0x000000010150c8ac in execute_pass_list (fn=0x7ffff5670000,
pass=0x10391d3f0) at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/passes.cc:2767
#21 0x0000000100cb35dc in cgraph_node::expand (this=0x7ffff56a0000) at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/cgraphunit.cc:1845
#22 0x0000000100cb4094 in expand_all_functions () at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/cgraphunit.cc:2028
#23 0x0000000100cb5148 in symbol_table::compile (this=0x7ffff5480000) at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/cgraphunit.cc:2404
#24 0x0000000100cb596c in symbol_table::finalize_compilation_unit
(this=0x7ffff5480000) at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/cgraphunit.cc:2589
#25 0x0000000101809178 in compile_file () at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/toplev.cc:476
#26 0x000000010180e000 in do_compile () at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/toplev.cc:2158
#27 0x000000010180e690 in toplev::main (this=0x7fffffffeb52, argc=11,
argv=0x7fffffffefa8) at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/toplev.cc:2314
#28 0x0000000102fb4674 in main (argc=11, argv=0x7fffffffefa8) at
/usr/src/debug/cross-alpha-unknown-linux-gnu/gcc-14.1.1_p20240518/gcc-14-20240518/gcc/main.cc:39
