https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121543
Bug ID: 121543
Summary: ICE in extract_insn, at recog.cc:2882 on
riscv64-linux-gnu with i686-linux-gnu host
Product: gcc
Version: 15.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: doko at gcc dot gnu.org
Target Milestone: ---
Created attachment 62118
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62118&action=edit
preprocessed source
seen with the gcc-15 branch 20250812 targeting riscv64-linux-gnu with a
i686-linux-gnu host. Using a 64bit host doesn't show this issue:
building with -march=rv64gc also doesn't show this issue.
building libbacktrace/dwarf.c
/home/packages/cross/15/u/gcc-cross/gcc/build/./gcc/xgcc
-B/home/packages/cross/15/u/gcc-cross/gcc/build/./
gcc/ -B/usr/riscv64-linux-gnu/bin/ -B/usr/riscv64-linux-gnu/lib/ -isystem
/usr/riscv64-linux-gnu/include -isystem /usr/riscv64
-linux-gnu/sys-include -isystem
/home/packages/cross/15/u/gcc-cross/gcc/build/sys-include -DHAVE_CONFIG_H -I.
-I../../../src/l
ibbacktrace -I ../../../src/libbacktrace/../include -I
../../../src/libbacktrace/../libgcc -I ../libgcc -funwind-tables -frand
om-seed=dwarf.lo -W -Wall -Wwrite-strings -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition -Wmissing-format-att
ribute -Wcast-qual -Wno-attributes -Wpointer-arith -fno-omit-frame-pointer -c
../../../src/libbacktrace/dwarf.c -fPIC -DPIC -
o .libs/dwarf.o
../../../src/libbacktrace/dwarf.c: In function 'is_highest_address':
../../../src/libbacktrace/dwarf.c:619:1: error: unrecognizable insn:
619 | }
| ^
(insn 80 79 81 12 (set (reg:DI 183)
(and:DI (reg:DI 185)
(const_int 2147483647 [0x7fffffff])))
"../../../src/libbacktrace/dwarf.c":613:22 -1
(expr_list:REG_EQUAL (const_int -4294967295 [0xffffffff00000001])
(nil)))
during RTL pass: vregs
../../../src/libbacktrace/dwarf.c:619:1: internal compiler error: in
extract_insn, at recog.cc:2882
0xa748b83 internal_error(char const*, ...)
../../src/gcc/diagnostic-global-context.cc:517
0x86374fb fancy_abort(char const*, int, char const*)
../../src/gcc/diagnostic.cc:1749
0x8601148 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../src/gcc/rtl-error.cc:108
0x8601177 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
../../src/gcc/rtl-error.cc:116
0x8600561 extract_insn(rtx_insn*)
../../src/gcc/recog.cc:2882
0x896c3b8 instantiate_virtual_regs_in_insn
../../src/gcc/function.cc:1612
0x896c3b8 instantiate_virtual_regs
../../src/gcc/function.cc:1995
0x896c3b8 execute
../../src/gcc/function.cc:2042
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
GCC is configured with
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2,cobol
--prefix=/usr
--with-gcc-major-version-only
--program-suffix=-15
--enable-shared
--enable-linker-build-id
--libexecdir=/usr/libexec
--without-included-gettext
--enable-threads=posix
--libdir=/usr/lib
--enable-nls
--with-sysroot=/
--enable-clocale=gnu
--enable-libstdcxx-debug
--enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new
--enable-libstdcxx-backtrace
--enable-gnu-unique-object
--disable-libquadmath
--disable-libquadmath-support
--enable-plugin
--enable-default-pie
--with-system-zlib
--enable-libphobos-checking=release
--without-target-system-zlib
--enable-multiarch
--disable-werror
--disable-multilib
--with-abi=lp64d
--with-arch=rv64i_m_a_f_d_c_b_v_zic64b_zicbom_zicbop_zicboz_ziccamoa_ziccif_zicclsm_ziccrse_zicntr_zicond_zicsr_zifencei_zihintntl_zihintpause_zihpm_zimop_zmmul_za64rs_zaamo_zalrsc_zawrs_zfa_zfhmin_zca_zcb_zcd_zcmop_zba_zbb_zbs_zkt_zvbb_zve32f_zve32x_zve64d_zve64f_zve64x_zvfhmin_zvkb_zvkt_zvl128b_zvl32b_zvl64b_supm
--enable-checking=release
--build=i686-linux-gnu
--host=i686-linux-gnu
--target=riscv64-linux-gnu
--program-prefix=riscv64-linux-gnu-
--includedir=/usr/riscv64-linux-gnu/include
cvise 2.11 isn't able to reduce, extending the source beyond the initial size.
[...]
00:07:57 INFO (31.3%, 156714 bytes, 1278 lines)
00:08:02 INFO (-11.8%, 255018 bytes, 1278 lines)
00:08:02 INFO skipping the rest of the pass (huge file increasement 300%)
00:08:02 INFO ===< ClangPass::callexpr-to-value >===
00:08:13 INFO (-11.7%, 254960 bytes, 1278 lines)
00:08:20 INFO (-11.7%, 254884 bytes, 1278 lines)
extending in dwarf_fileline
for (ddata = state->fileline_data;
state->fileline_data != 0 ;
ddata = ddata->next->next->next->next->next->next ...
some thousand times.
