https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117946
Bug ID: 117946
Summary: ICE: maximum number of generated reload insns per insn
achieved (90) with -O -favoid-store-forwarding
-mavx10.1 -mprefer-avx128
--param=store-forwarding-max-distance=128
Product: gcc
Version: 15.0
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: x86_64-pc-linux-gnu
Created attachment 59810
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59810&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -favoid-store-forwarding -mavx10.1 -mprefer-avx128
--param=store-forwarding-max-distance=128 testcase.c -Wno-psabi
during RTL pass: reload
testcase.c: In function 'foo':
testcase.c:14:1: internal compiler error: maximum number of generated reload
insns per insn achieved (90)
14 | }
| ^
0x2dc5420 internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:517
0x142dce0 lra_constraints(bool)
/repo/gcc-trunk/gcc/lra-constraints.cc:5406
0x1414de4 lra(_IO_FILE*, int)
/repo/gcc-trunk/gcc/lra.cc:2445
0x13be92f do_reload
/repo/gcc-trunk/gcc/ira.cc:5977
0x13be92f execute
/repo/gcc-trunk/gcc/ira.cc:6165
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.
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-20241206114843-r15-5988-g5a022062d22e0b-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/15.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --with-cloog --with-ppl --with-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --enable-libsanitizer
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20241206114843-r15-5988-g5a022062d22e0b-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.0 20241206 (experimental) (GCC)
