http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48235
Summary: [4.5/4.6/4.7 Regression] ICE: SIGSEGV in has_dependence_p (sel-sched-ir.c:3263) with -fselective-scheduling2 and custom flags Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: rtl-optimization AssignedTo: unassig...@gcc.gnu.org ReportedBy: zso...@seznam.cz Host: x86_64-pc-linux-gnu Target: x86_64-pc-linux-gnu Created attachment 23748 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23748 reduced testcase Compiler output: $ gcc -O -fno-guess-branch-probability -fpeel-loops -freorder-blocks-and-partition -fschedule-insns2 -fsel-sched-pipelining -fselective-scheduling2 testcase.c ==30435== Invalid read of size 4 ==30435== at 0x891635: has_dependence_p (sel-sched-ir.c:3263) ==30435== by 0x8A47AE: moveup_expr_cached (sel-sched.c:2215) ==30435== by 0x8B26F1: move_op_ascend (sel-sched.c:6159) ==30435== by 0x8A8A57: code_motion_path_driver (sel-sched.c:6629) ==30435== by 0x8AE8B4: schedule_expr_on_boundary (sel-sched.c:6681) ==30435== by 0x8B0239: schedule_on_fences (sel-sched.c:5587) ==30435== by 0x8B14AA: sel_sched_region_2 (sel-sched.c:7454) ==30435== by 0x8B480A: sel_sched_region (sel-sched.c:7498) ==30435== by 0x8B62B1: run_selective_scheduling (sel-sched.c:7675) ==30435== by 0x884615: rest_of_handle_sched2 (sched-rgn.c:3523) ==30435== by 0x7FB455: execute_one_pass (passes.c:1556) ==30435== by 0x7FB744: execute_pass_list (passes.c:1611) ==30435== Address 0x8 is not stack'd, malloc'd or (recently) free'd ==30435== testcase.c: In function 'GetHangarNum': testcase.c:55:1: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. Tested revisions: r171265 - crash 4.6 r170955 - crash 4.5 r170955 - crash 4.4 r170955 - OK