https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94603
Bug ID: 94603 Summary: ICE: in extract_insn, at recog.c:2343 (unrecognizable insn) with -mno-sse2 and __builtin_ia32_movq128 Product: gcc Version: 10.0 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 Created attachment 48277 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48277&action=edit reduced testcase Compiler output: $ x86_64-pc-linux-gnu-gcc -mno-sse2 testcase.c testcase.c: In function 'foo': testcase.c:7:1: error: unrecognizable insn: 7 | } | ^ (insn 7 6 8 2 (set (reg:V2DI 84) (vec_concat:V2DI (vec_select:DI (subreg:V2DI (reg:TI 85) 0) (parallel [ (const_int 0 [0]) ])) (const_int 0 [0]))) "testcase.c":6:10 -1 (nil)) during RTL pass: vregs testcase.c:7:1: internal compiler error: in extract_insn, at recog.c:2294 0x6d3efe _fatal_insn(char const*, rtx_def const*, char const*, int, char const*) /repo/gcc-trunk/gcc/rtl-error.c:108 0x6d3f81 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*) /repo/gcc-trunk/gcc/rtl-error.c:116 0x6c3367 extract_insn(rtx_insn*) /repo/gcc-trunk/gcc/recog.c:2294 0xca8923 instantiate_virtual_regs_in_insn /repo/gcc-trunk/gcc/function.c:1607 0xca8923 instantiate_virtual_regs /repo/gcc-trunk/gcc/function.c:1977 0xca8923 execute /repo/gcc-trunk/gcc/function.c:2026 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-r10-7691-20200412170534-g87be4cecfc6-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/10.0.1/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 --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-r10-7691-20200412170534-g87be4cecfc6-checking-yes-rtl-df-extra-amd64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 10.0.1 20200412 (experimental) (GCC)