http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48302
Summary: ICE: SIGSEGV in reposition_prologue_and_epilogue_notes (function.c:5662) with -fcrossjumping -fselective-scheduling2 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 23781 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23781 reduced testcase Command line: $ gcc -O -fcrossjumping -fgcse -fschedule-insns2 -fsel-sched-pipelining -fsel-sched-pipelining-outer-loops -fselective-scheduling2 --param lim-expensive=320 --param min-crossjump-insns=1 testcase.C or $ gcc -O2 -fsel-sched-pipelining -fsel-sched-pipelining-outer-loops -fselective-scheduling2 -fno-tree-copy-prop -fno-tree-vrp --param min-crossjump-insns=1 testcase.C Compiler output: $ gcc -O2 -fsel-sched-pipelining -fsel-sched-pipelining-outer-loops -fselective-scheduling2 -fno-tree-copy-prop -fno-tree-vrp --param min-crossjump-insns=1 testcase.C ==18470== Invalid read of size 2 ==18470== at 0x8731AB: reposition_prologue_and_epilogue_notes (function.c:5662) ==18470== by 0x9BB9CC: sched_rgn_finish (sched-rgn.c:3074) ==18470== by 0x9F1359: run_selective_scheduling (sel-sched.c:7645) ==18470== by 0x9BF695: rest_of_handle_sched2 (sched-rgn.c:3523) ==18470== by 0x937AA5: execute_one_pass (passes.c:1555) ==18470== by 0x937D94: execute_pass_list (passes.c:1610) ==18470== by 0x937DA6: execute_pass_list (passes.c:1611) ==18470== by 0x937DA6: execute_pass_list (passes.c:1611) ==18470== by 0xA79D95: tree_rest_of_compilation (tree-optimize.c:422) ==18470== by 0xC44D11: cgraph_expand_function (cgraphunit.c:1576) ==18470== by 0xC473E9: cgraph_optimize (cgraphunit.c:1635) ==18470== by 0xC47969: cgraph_finalize_compilation_unit (cgraphunit.c:1096) ==18470== Address 0x0 is not stack'd, malloc'd or (recently) free'd ==18470== testcase.C: In function 'void foo()': testcase.C:18:1: 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: r171573 - crash 4.6 r170955 - crash 4.5 r170955 - crash 4.4 r170955 - crash (the -O1 version)