https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107262
Bug ID: 107262 Summary: ICE: in as_a, at machmode.h:366 with __bf16 arithmetics at -Ofast Product: gcc Version: 13.0 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 53704 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53704&action=edit reduced testcase Compiler output: $ x86_64-pc-linux-gnu-gcc -Ofast testcase.c during RTL pass: expand testcase.c: In function 'foo': testcase.c:8:10: internal compiler error: in as_a, at machmode.h:366 8 | return b; | ^ 0x6ddea3 scalar_int_mode as_a<scalar_int_mode>(machine_mode) /repo/gcc-trunk/gcc/machmode.h:366 0x6e4005 scalar_mode as_a<scalar_mode>(machine_mode) /repo/gcc-trunk/gcc/expr.cc:373 0x6e4005 convert_mode_scalar /repo/gcc-trunk/gcc/expr.cc:325 0xfe4442 convert_mode_scalar /repo/gcc-trunk/gcc/expr.cc:420 0xfe57f8 convert_modes(machine_mode, machine_mode, rtx_def*, int) /repo/gcc-trunk/gcc/expr.cc:924 0x1282633 expand_binop(machine_mode, optab_tag, rtx_def*, rtx_def*, rtx_def*, int, optab_methods) /repo/gcc-trunk/gcc/optabs.cc:1668 0xfd8f7c expand_expr_real_2(separate_ops*, rtx_def*, machine_mode, expand_modifier) /repo/gcc-trunk/gcc/expr.cc:10593 0xfe0295 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool) /repo/gcc-trunk/gcc/expr.cc:10795 0xeac81c expand_expr /repo/gcc-trunk/gcc/expr.h:310 0xeac81c expand_return /repo/gcc-trunk/gcc/cfgexpand.cc:3809 0xeac81c expand_gimple_stmt_1 /repo/gcc-trunk/gcc/cfgexpand.cc:3918 0xeac81c expand_gimple_stmt /repo/gcc-trunk/gcc/cfgexpand.cc:4044 0xeb251e expand_gimple_basic_block /repo/gcc-trunk/gcc/cfgexpand.cc:6096 0xeb411f execute /repo/gcc-trunk/gcc/cfgexpand.cc:6822 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-r13-3298-20221014120235-ga75e9bee7c2-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/13.0.0/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 --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-r13-3298-20221014120235-ga75e9bee7c2-checking-yes-rtl-df-extra-nobootstrap-amd64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 13.0.0 20221014 (experimental) (GCC)