https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65990
Bug ID: 65990 Summary: ICE: in extract_insn, at recog.c:2341 (unrecognizable insn) with -mmemcpy-strategy=rep_8byte:-1:noalign -m32 -mtune=btver2 Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz Target Milestone: --- Created attachment 35447 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35447&action=edit reduced testcase Compiler output: $ gcc -mmemcpy-strategy=rep_8byte:-1:noalign -m32 -mtune=btver2 testcase.c testcase.c: In function 'foo': testcase.c:24:1: error: unrecognizable insn: } ^ (insn 8 7 9 2 (parallel [ (set (reg:SI 89) (const_int 0 [0])) (set (reg/f:SI 87) (plus:SI (ashift:SI (reg:SI 89) (const_int 3 [0x3])) (reg/f:SI 87))) (set (reg/f:SI 88) (plus:SI (ashift:SI (reg:SI 89) (const_int 3 [0x3])) (reg/f:SI 88))) (set (mem/c:BLK (reg/f:SI 87) [0 u9+0 S32 A32]) (mem/u/c:BLK (reg/f:SI 88) [0 S32 A32])) (use (reg:SI 89)) ]) testcase.c:11 -1 (nil)) testcase.c:24:1: internal compiler error: in extract_insn, at recog.c:2341 0xae3e58 _fatal_insn(char const*, rtx_def const*, char const*, int, char const*) /mnt/svn/gcc-trunk/gcc/rtl-error.c:110 0xae3ee8 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*) /mnt/svn/gcc-trunk/gcc/rtl-error.c:118 0xa99fe8 extract_insn(rtx_insn*) /mnt/svn/gcc-trunk/gcc/recog.c:2341 0x866dde instantiate_virtual_regs_in_insn /mnt/svn/gcc-trunk/gcc/function.c:1646 0x866dde instantiate_virtual_regs /mnt/svn/gcc-trunk/gcc/function.c:1966 0x866dde execute /mnt/svn/gcc-trunk/gcc/function.c:2015 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <http://gcc.gnu.org/bugs.html> for instructions. Tested revisions: r222716 - ICE 5 r222437 - ICE 4_9 r222436 - ICE