https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99321
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:a18ebd6c439227b048a91fbfa66f5983f884c157 commit r11-7548-ga18ebd6c439227b048a91fbfa66f5983f884c157 Author: Jakub Jelinek <ja...@redhat.com> Date: Sun Mar 7 10:27:28 2021 +0100 i386: Fix some -mavx512vl -mno-avx512bw bugs [PR99321] As I wrote in the mail with the previous PR99321 fix, we have various bugs where we emit instructions that need avx512bw and avx512vl ISAs when compiling with -mavx512vl -mno-avx512bw. Without the following patch, the attached testcase fails with: /tmp/ccW4PsfG.s: Assembler messages: /tmp/ccW4PsfG.s:9: Error: unsupported instruction `vpaddb' /tmp/ccW4PsfG.s:20: Error: unsupported instruction `vpaddb' /tmp/ccW4PsfG.s:31: Error: unsupported instruction `vpaddw' /tmp/ccW4PsfG.s:42: Error: unsupported instruction `vpaddw' /tmp/ccW4PsfG.s:53: Error: unsupported instruction `vpsubb' /tmp/ccW4PsfG.s:64: Error: unsupported instruction `vpsubb' /tmp/ccW4PsfG.s:75: Error: unsupported instruction `vpsubw' /tmp/ccW4PsfG.s:86: Error: unsupported instruction `vpsubw' /tmp/ccW4PsfG.s:97: Error: unsupported instruction `vpmullw' /tmp/ccW4PsfG.s:108: Error: unsupported instruction `vpmullw' /tmp/ccW4PsfG.s:133: Error: unsupported instruction `vpminub' /tmp/ccW4PsfG.s:144: Error: unsupported instruction `vpminuw' /tmp/ccW4PsfG.s:155: Error: unsupported instruction `vpminuw' /tmp/ccW4PsfG.s:166: Error: unsupported instruction `vpminsb' /tmp/ccW4PsfG.s:177: Error: unsupported instruction `vpminsb' /tmp/ccW4PsfG.s:202: Error: unsupported instruction `vpminsw' /tmp/ccW4PsfG.s:227: Error: unsupported instruction `vpmaxub' /tmp/ccW4PsfG.s:238: Error: unsupported instruction `vpmaxuw' /tmp/ccW4PsfG.s:249: Error: unsupported instruction `vpmaxuw' /tmp/ccW4PsfG.s:260: Error: unsupported instruction `vpmaxsb' /tmp/ccW4PsfG.s:271: Error: unsupported instruction `vpmaxsb' /tmp/ccW4PsfG.s:296: Error: unsupported instruction `vpmaxsw' We already have Yw constraint which is equivalent to v for -mavx512bw -mavx512vl and to nothing otherwise, per discussions this patch changes it to stand for x otherwise. As it is an undocumented internal constraint, hopefully it won't affect any inline asm in the wild. For the instructions that need both we need to use Yw and v for modes that don't need that. 2021-03-07 Jakub Jelinek <ja...@redhat.com> PR target/99321 * config/i386/constraints.md (Yw): Use SSE_REGS if TARGET_SSE but TARGET_AVX512BW or TARGET_AVX512VL is not set. Adjust description and comment. * config/i386/sse.md (v_Yw): New define_mode_attr. (*<insn><mode>3, *mul<mode>3<mask_name>, *avx2_<code><mode>3, *sse4_1_<code><mode>3<mask_name>): Use <v_Yw> instead of v in constraints. * config/i386/mmx.md (mmx_pshufw_1, *vec_dupv4hi): Use Yw instead of xYw in constraints. * lib/target-supports.exp (check_effective_target_assembler_march_noavx512bw): New effective target. * gcc.target/i386/avx512vl-pr99321-1.c: New test.
