http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50644
Bug #: 50644 Summary: ICE in set_is_used added today Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization AssignedTo: unassig...@gcc.gnu.org ReportedBy: andi-...@firstfloor.org Since updating to today's trunk I get a ICE in set_is_used while building a LTOed linux kernel. Yesterday it didn't happen Running a bisect. Here's the crash #7 <signal handler called> #8 set_is_used (var=<value optimized out>) at +../../gcc/gcc/tree-flow-inline.h:562 #9 mark_all_vars_used_1 (var=<value optimized out>) at +../../gcc/gcc/tree-ssa-live.c:379 #10 0x0000000000860b3e in walk_tree_1 (tp=0x2b11d2f00c00, func=0x7a4390 +<mark_all_vars_used_1(tree*, int*, void*)>, data=0x4296a40, pset=0x0, lh=0) at ../../gcc/gcc/tree.c:10448 #11 0x0000000000860f89 in walk_tree_1 (tp=0x2b11d2efacd0, func=0x7a4390 +<mark_all_vars_used_1(tree*, int*, void*)>, data=0x4296a40, pset=0x0, lh=0) at ../../gcc/gcc/tree.c:10526 #12 0x00000000007a4eb5 in mark_all_vars_used (data=<value optimized out>, +expr_p=<value optimized out>) at ../../gcc/gcc/tree-ssa-live.c:595 #13 remove_unused_locals (data=<value optimized out>, expr_p=<value optimized +out>) at ../../gcc/gcc/tree-ssa-live.c:798 #14 0x000000000068c268 in execute_function_todo (data=Unhandled dwarf +expression opcode 0xf3 ) at ../../gcc/gcc/passes.c:1695 #15 0x000000000068d114 in execute_todo (flags=2132516) at +../../gcc/gcc/passes.c:1741 #16 0x000000000068f3ce in execute_one_ipa_transform_pass (ipa_pass=0x10ac6e0, +node=0x2b11e3116ea0) at ../../gcc/gcc/passes.c:1919 #17 execute_all_ipa_transforms (ipa_pass=0x10ac6e0, node=0x2b11e3116ea0) at +../../gcc/gcc/passes.c:1947 #18 0x000000000075fd20 in tree_rest_of_compilation (fndecl=0x2b11d2ed7300) at +../../gcc/gcc/tree-optimize.c:413 #19 0x000000000051b8a6 in cgraph_expand_function (node=0x2b11e3116ea0) at +../../gcc/gcc/cgraphunit.c:1805 #20 0x000000000051d182 in cgraph_output_in_order () at +../../gcc/gcc/cgraphunit.c:1962 #21 cgraph_optimize () at ../../gcc/gcc/cgraphunit.c:2136 ... (gdb) up #8 set_is_used (var=<value optimized out>) at +../../gcc/gcc/tree-flow-inline.h:562 562 ann->used = true; (gdb) p ann $1 = (var_ann_d *) 0x0