https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123318
Bug ID: 123318
Summary: [14/15/16 Regression] ICE: in extract_insn, at
recog.cc:2888 (unrecognizable insn) (set (reg:SF 159)
(unspec:DI [...] UNSPEC_AUIPC)) with -Ofast
-mcmodel=medany -mexplicit-relocs -march=rv64gv
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: riscv64-unknown-linux-gnu
Created attachment 63165
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=63165&action=edit
reduced testcase
Compiler output:
$ riscv64-unknown-linux-gnu-gcc -Ofast -mcmodel=medany -mexplicit-relocs
-march=rv64gv testcase.c
testcase.c: In function 'foo':
testcase.c:10:1: error: unrecognizable insn:
10 | }
| ^
(insn 25 24 26 2 (set (reg:SF 159)
(unspec:DI [
(symbol_ref/u:DI ("*.LC0") [flags 0x82])
(const_int 4 [0x4])
(pc)
] UNSPEC_AUIPC)) "testcase.c":9:6 -1
(nil))
during RTL pass: vregs
testcase.c:10:1: internal compiler error: in extract_insn, at recog.cc:2888
0x3644a2d internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:787
0x11333d3 fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostics/context.cc:1805
0xccb06b _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/repo/gcc-trunk/gcc/rtl-error.cc:108
0xccb0e8 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/repo/gcc-trunk/gcc/rtl-error.cc:116
0xcbbdf1 extract_insn(rtx_insn*)
/repo/gcc-trunk/gcc/recog.cc:2888
0x151be6b instantiate_virtual_regs_in_insn
/repo/gcc-trunk/gcc/function.cc:1609
0x151be6b instantiate_virtual_regs
/repo/gcc-trunk/gcc/function.cc:1985
0x151be6b execute
/repo/gcc-trunk/gcc/function.cc:2032
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ riscv64-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-riscv64/bin/riscv64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-20251227103240-r16-6403-g48db9b45057416-checking-yes-rtl-df-extra-riscv64/bin/../libexec/gcc/riscv64-unknown-linux-gnu/16.0.0/lto-wrapper
Target: riscv64-unknown-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--enable-libsanitizer --with-isa-spec=2.2
--with-sysroot=/usr/riscv64-unknown-linux-gnu --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=riscv64-unknown-linux-gnu
--with-ld=/usr/bin/riscv64-unknown-linux-gnu-ld
--with-as=/usr/bin/riscv64-unknown-linux-gnu-as --disable-multilib
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20251227103240-r16-6403-g48db9b45057416-checking-yes-rtl-df-extra-riscv64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 16.0.0 20251227 (experimental) (GCC)
