use '-O2 -finline-functions -ftracer -floop-optimize2' to reproduce: ---------------------------------------------------------------------------------------- extern void fancy_abort (void) __attribute__ ((__noreturn__));
int reverse_condition (int code) { switch (code) { case 4: return 3; case 3: return 4; case 6: return 7; case 7: return 8; case 8: return 5; case 5: return 6; default: fancy_abort (); } } int reversed_comparison_code_parts (int code, int code2) { switch (code) { case 4: case 3: return reverse_condition (code); } if (code2 == 1) return reverse_condition (code); return 0; } ---------------------------------------------------------------------------------------- backtrace: Program received signal SIGSEGV, Segmentation fault. try_crossjump_to_edge (mode=19, e1=0x7, e2=0x40219a08) at ../../gcc/gcc/cfgcleanup.c:1637 1637 s->count += s2->count; (gdb) bt #0 try_crossjump_to_edge (mode=19, e1=0x7, e2=0x40219a08) at ../../gcc/gcc/cfgcleanup.c:1637 #1 0x08178cfa in try_crossjump_bb (mode=19, bb=0x4021acb0) at ../../gcc/gcc/cfgcleanup.c:1810 #2 0x08179acc in cleanup_cfg (mode=19) at ../../gcc/gcc/cfgcleanup.c:1997 #3 0x083b8127 in rest_of_handle_flow2 () at ../../gcc/gcc/passes.c:1322 #4 0x083b8b20 in rest_of_compilation () at ../../gcc/gcc/passes.c:1728 #5 0x080c91aa in execute_pass_list (pass=0x852ba80) at ../../gcc/gcc/tree-optimize.c:516 #6 0x080c93f1 in tree_rest_of_compilation (fndecl=0x4020f244) at ../../gcc/gcc/tree-optimize.c:652 #7 0x080615d1 in c_expand_body (fndecl=0x4020f244) at ../../gcc/gcc/c-decl.c:6387 #8 0x083e1167 in cgraph_expand_function (node=0x4020f4fc) at ../../gcc/gcc/cgraphunit.c:822 #9 0x083e1e8b in cgraph_optimize () at ../../gcc/gcc/cgraphunit.c:1689 #10 0x0838fa67 in toplev_main (argc=1075931488, argv=0x85d1498) at ../../gcc/gcc/toplev.c:1005 #11 0x080a7bae in main (argc=1075931488, argv=0x40216960) at ../../gcc/gcc/main.c:35 -- Summary: [4.0 Regression] ICE Segmentation fault in try_crossjump_to_edge at ../../gcc/gcc/cfgcleanup.c:1637 Product: gcc Version: 4.0.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P2 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: belyshev at lubercy dot com CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18861