https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122147
Bug ID: 122147
Summary: [16 Regression] ICE: maximum number of generated
reload insns per insn achieved (90) with -O2
-march=rv64gcv
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 62493
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62493&action=edit
reduced testcase
Compiler output:
$ riscv64-unknown-linux-gnu-gcc -O2 -march=rv64gcv testcase.c
during RTL pass: reload
testcase.c: In function 'foo':
testcase.c:10:1: internal compiler error: maximum number of generated reload
insns per insn achieved (90)
10 | }
| ^
0x337b5bc internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:786
0x168ae48 lra_constraints(bool)
/repo/gcc-trunk/gcc/lra-constraints.cc:5496
0x1670e24 lra(_IO_FILE*, int)
/repo/gcc-trunk/gcc/lra.cc:2455
0x161a2ef do_reload
/repo/gcc-trunk/gcc/ira.cc:6070
0x161a2ef execute
/repo/gcc-trunk/gcc/ira.cc:6258
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-20251003082950-r16-4194-ge4e6a42ae93a6a-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-20251003082950-r16-4194-ge4e6a42ae93a6a-checking-yes-rtl-df-extra-riscv64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 16.0.0 20251002 (experimental) (GCC)
