https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94461
--- Comment #1 from Zdenek Sojka <zsojka at seznam dot cz> --- This seems to affect sse3 intrinsics as well: $ gcc-10 testcase-min0.i -w testcase-min0.i: In function 'foo0': testcase-min0.i:15:1: error: unrecognizable insn: 15 | } | ^ (insn 28 27 29 2 (set (reg:V2SI 83 [ _2 ]) (vec_concat:V2SI (minus:SI (vec_select:SI (reg:V2SI 95) (parallel [ (const_int 0 [0]) ])) (vec_select:SI (reg:V2SI 95) (parallel [ (const_int 1 [0x1]) ]))) (minus:SI (vec_select:SI (reg:V2SI 82 [ _1 ]) (parallel [ (const_int 0 [0]) ])) (vec_select:SI (reg:V2SI 82 [ _1 ]) (parallel [ (const_int 1 [0x1]) ]))))) "testcase-min0.i":14:20 -1 (nil)) during RTL pass: vregs testcase-min0.i:15:1: 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. $ gcc-9 testcase-min0.i -w testcase-min0.i: In function 'foo0': testcase-min0.i:14:20: error: '__builtin_ia32_phsubd' needs isa option -mssse3 -mmmx 14 | v64s32 v64s32_3 = __builtin_ia32_psrld(__builtin_ia32_phsubd (v64s32_2, __builtin_ia32_pandn(v64s32_1, v64s32_2)), v64s32_0); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Applies at least to __builtin_ia32_psubd() and __builtin_ia32_psubb() as well.