https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84845
Bug ID: 84845 Summary: [8 Regression] ICE: in extract_insn, at recog.c:2304: unrecognizable insn at -O2 and above at aarch64 Product: gcc Version: 8.0 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 Target: aarch64-unknown-linux-gnu Created attachment 43640 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43640&action=edit reduced testcase Compiler output: $ aarch64-unknown-linux-gnu-gcc -O2 testcase.c testcase.c: In function 'foo': testcase.c:9:1: error: unrecognizable insn: } ^ (insn 30 29 26 2 (set (reg:DI 114) (rotatert:DI (reg:DI 115 [ d ]) (subreg:QI (and:SI (reg:SI 118) (const_int 65535 [0xffff])) 0))) "testcase.c":8 -1 (expr_list:REG_DEAD (reg:SI 118) (expr_list:REG_DEAD (reg:DI 115 [ d ]) (nil)))) during RTL pass: sched1 testcase.c:9:1: internal compiler error: in extract_insn, at recog.c:2304 0x5b87a4 _fatal_insn(char const*, rtx_def const*, char const*, int, char const*) /repo/gcc-trunk/gcc/rtl-error.c:108 0x5b8828 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*) /repo/gcc-trunk/gcc/rtl-error.c:116 0xbbd41c extract_insn(rtx_insn*) /repo/gcc-trunk/gcc/recog.c:2304 0xa68ad7 scan_one_insn /repo/gcc-trunk/gcc/ira-costs.c:1449 0xa68ad7 process_bb_for_costs /repo/gcc-trunk/gcc/ira-costs.c:1613 0xa696c4 find_costs_and_classes /repo/gcc-trunk/gcc/ira-costs.c:1720 0xa6abaa ira_set_pseudo_classes(bool, _IO_FILE*) /repo/gcc-trunk/gcc/ira-costs.c:2267 0x1487e00 alloc_global_sched_pressure_data /repo/gcc-trunk/gcc/haifa-sched.c:7157 0x1487e00 sched_init() /repo/gcc-trunk/gcc/haifa-sched.c:7314 0x148978d haifa_sched_init() /repo/gcc-trunk/gcc/haifa-sched.c:7326 0xc220b9 schedule_insns() /repo/gcc-trunk/gcc/sched-rgn.c:3504 0xc22973 schedule_insns() /repo/gcc-trunk/gcc/sched-rgn.c:3498 0xc22973 rest_of_handle_sched /repo/gcc-trunk/gcc/sched-rgn.c:3717 0xc22973 execute /repo/gcc-trunk/gcc/sched-rgn.c:3825 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. $ aarch64-unknown-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest-aarch64/bin/aarch64-unknown-linux-gnu-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-258459-checking-yes-rtl-df-extra-aarch64/bin/../libexec/gcc/aarch64-unknown-linux-gnu/8.0.1/lto-wrapper Target: aarch64-unknown-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 --with-sysroot=/usr/aarch64-unknown-linux-gnu --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=aarch64-unknown-linux-gnu --with-ld=/usr/bin/aarch64-unknown-linux-gnu-ld --with-as=/usr/bin/aarch64-unknown-linux-gnu-as --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-258459-checking-yes-rtl-df-extra-aarch64 Thread model: posix gcc version 8.0.1 20180312 (experimental) (GCC)