https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91604
Bug ID: 91604 Summary: [10 Regression] ICE in extract_insn at recog.c:2310 since r272323 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: marxin at gcc dot gnu.org CC: uros at gcc dot gnu.org Target Milestone: --- Starting from the revision I see: $ cat ice.c long long v; int fn1() { v = ~v; } $ gcc -O3 --param max-gcse-memory=0 -m32 -fno-rerun-cse-after-loop ice.c ice.c: In function ‘fn1’: ice.c:2:1: error: unrecognizable insn: 2 | int fn1() { v = ~v; } | ^~~ (insn 16 15 17 2 (set (mem/c:SI (reg/f:SI 87) [1 v+0 S4 A64]) (not:SI (mem/c:SI (reg/f:SI 85) [1 v+0 S4 A64]))) "ice.c":2:17 -1 (nil)) during RTL pass: subreg3 ice.c:2:1: internal compiler error: in extract_insn, at recog.c:2310 0x6a61cf _fatal_insn(char const*, rtx_def const*, char const*, int, char const*) /home/marxin/Programming/gcc/gcc/rtl-error.c:108 0x6a61eb _fatal_insn_not_found(rtx_def const*, char const*, int, char const*) /home/marxin/Programming/gcc/gcc/rtl-error.c:116 0x6a4373 extract_insn(rtx_insn*) /home/marxin/Programming/gcc/gcc/recog.c:2310 0x16b1217 decompose_multiword_subregs /home/marxin/Programming/gcc/gcc/lower-subreg.c:1540 0x16b234d execute /home/marxin/Programming/gcc/gcc/lower-subreg.c:1808 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.