https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84068
Bug ID: 84068 Summary: ICE: qsort checking failed: qsort comparator non-negative on sorted output: 1 with -fno-sched-critical-path-heuristic --param=max-sched-extend-regions-iters=5 @ aarch64 Product: gcc Version: 8.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: rtl-optimization 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 43258 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43258&action=edit reduced testcase Compiler output: $ aarch64-unknown-linux-gnu-gcc -O2 -fno-sched-critical-path-heuristic -fno-sched-rank-heuristic --param=max-sched-extend-regions-iters=5 testcase.c testcase.c: In function 'foo': testcase.c:7:1: error: qsort comparator non-negative on sorted output: 1 } ^ during RTL pass: sched1 testcase.c:7:1: internal compiler error: qsort checking failed 0x5ec995 qsort_chk_error /repo/gcc-trunk/gcc/vec.c:201 0x156d5ca qsort_chk(void*, unsigned long, unsigned long, int (*)(void const*, void const*)) /repo/gcc-trunk/gcc/vec.c:253 0x146c640 ready_sort_real /repo/gcc-trunk/gcc/haifa-sched.c:3087 0x14756ca schedule_block(basic_block_def**, void*) /repo/gcc-trunk/gcc/haifa-sched.c:6675 0xc1b7da schedule_region /repo/gcc-trunk/gcc/sched-rgn.c:3174 0xc1b7da schedule_insns() /repo/gcc-trunk/gcc/sched-rgn.c:3513 0xc1bc03 schedule_insns() /repo/gcc-trunk/gcc/sched-rgn.c:3498 0xc1bc03 rest_of_handle_sched /repo/gcc-trunk/gcc/sched-rgn.c:3717 0xc1bc03 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-257087-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-257087-checking-yes-rtl-df-extra-aarch64 Thread model: posix gcc version 8.0.1 20180126 (experimental) (GCC)