https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96262
Bug ID: 96262 Summary: [11 Regression] ICE: in decompose, at rtl.h:2280 with -O -mavx512bw Product: gcc Version: 11.0 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 48903 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48903&action=edit reduced testcase Compiler output: $ x86_64-pc-linux-gnu-gcc -O -mavx512bw testcase.c during RTL pass: combine testcase.c: In function 'foo': testcase.c:7:1: internal compiler error: in decompose, at rtl.h:2280 7 | } | ^ 0x7267b9 wi::int_traits<std::pair<rtx_def*, machine_mode> >::decompose(long*, unsigned int, std::pair<rtx_def*, machine_mode> const&) /repo/gcc-trunk/gcc/rtl.h:2280 0x7267b9 wide_int_ref_storage<false, true>::wide_int_ref_storage<std::pair<rtx_def*, machine_mode> >(std::pair<rtx_def*, machine_mode> const&) /repo/gcc-trunk/gcc/wide-int.h:1024 0x7267b9 generic_wide_int<wide_int_ref_storage<false, true> >::generic_wide_int<std::pair<rtx_def*, machine_mode> >(std::pair<rtx_def*, machine_mode> const&) /repo/gcc-trunk/gcc/wide-int.h:782 0x7267b9 simplify_const_unary_operation(rtx_code, machine_mode, rtx_def*, machine_mode) /repo/gcc-trunk/gcc/simplify-rtx.c:1793 0x10ad410 simplify_unary_operation(rtx_code, machine_mode, rtx_def*, machine_mode) /repo/gcc-trunk/gcc/simplify-rtx.c:868 0x10b0c6e simplify_const_unary_operation(rtx_code, machine_mode, rtx_def*, machine_mode) /repo/gcc-trunk/gcc/simplify-rtx.c:1765 0x10ad410 simplify_unary_operation(rtx_code, machine_mode, rtx_def*, machine_mode) /repo/gcc-trunk/gcc/simplify-rtx.c:868 0x1af73b5 combine_simplify_rtx /repo/gcc-trunk/gcc/combine.c:5785 0x1afa007 subst /repo/gcc-trunk/gcc/combine.c:5725 0x1afa16e subst /repo/gcc-trunk/gcc/combine.c:5658 0x1afa16e subst /repo/gcc-trunk/gcc/combine.c:5658 0x1afc126 try_combine /repo/gcc-trunk/gcc/combine.c:3451 0x1b04f14 combine_instructions /repo/gcc-trunk/gcc/combine.c:1324 0x1b04f14 rest_of_handle_combine /repo/gcc-trunk/gcc/combine.c:15068 0x1b04f14 execute /repo/gcc-trunk/gcc/combine.c:15113 Please submit a full bug report, with preprocessed source if appropriate. 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-r11-2246-20200721142816-gc850a642e1d-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/11.0.0/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-r11-2246-20200721142816-gc850a642e1d-checking-yes-rtl-df-extra-nobootstrap-amd64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 11.0.0 20200721 (experimental) (GCC)