https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94461
Bug ID: 94461 Summary: [10 Regression] ICE: in extract_insn, at recog.c:2294 with __builtin_ia32_pmuludq() and -mno-sse2 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 48174 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48174&action=edit reduced testcase Compiler output: $ x86_64-pc-linux-gnu-gcc -mno-sse2 testcase.c testcase.c: In function 'foo': testcase.c:8:1: error: unrecognizable insn: 8 | } | ^ (insn 7 6 10 2 (set (reg:V1DI 82 [ _2 ]) (mult:V1DI (zero_extend:V1DI (vec_select:V1SI (reg:V2SI 84) (parallel [ (const_int 0 [0]) ]))) (zero_extend:V1DI (vec_select:V1SI (reg:V2SI 84) (parallel [ (const_int 0 [0]) ]))))) "testcase.c":7:10 -1 (nil)) during RTL pass: vregs testcase.c:8:1: internal compiler error: in extract_insn, at recog.c:2294 0x6d36a8 _fatal_insn(char const*, rtx_def const*, char const*, int, char const*) /repo/gcc-trunk/gcc/rtl-error.c:108 0x6d372b _fatal_insn_not_found(rtx_def const*, char const*, int, char const*) /repo/gcc-trunk/gcc/rtl-error.c:116 0x6c2b11 extract_insn(rtx_insn*) /repo/gcc-trunk/gcc/recog.c:2294 0xca6a83 instantiate_virtual_regs_in_insn /repo/gcc-trunk/gcc/function.c:1607 0xca6a83 instantiate_virtual_regs /repo/gcc-trunk/gcc/function.c:1977 0xca6a83 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. Compiler output (gcc-9): $ x86_64-pc-linux-gnu-gcc -mno-sse2 testcase.c testcase.c: In function 'foo': testcase.c:7:10: error: '__builtin_ia32_pmuludq' needs isa option -msse2 -mmmx 7 | return __builtin_ia32_pmuludq (a, a); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ $ 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-r10-7481-20200331151333-gf14b41d2712-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-r10-7481-20200331151333-gf14b41d2712-checking-yes-rtl-df-extra-amd64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 10.0.1 20200331 (experimental) (GCC)