https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64391
Bug ID: 64391 Summary: ICE: SIGSEGV in get_attrs_for (trans-mem.c:179) with -fgnu-tm and #pragma GCC ivdep Product: gcc Version: 5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz Created attachment 34324 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34324&action=edit reduced testcase Compiler output: $ gcc -fgnu-tm testcase.c -wrapper valgrind,-q ==19617== Invalid read of size 2 ==19617== at 0xC5B0A4: get_attrs_for(tree_node const*) (trans-mem.c:179) ==19617== by 0xC5DE28: is_tm_may_cancel_outer(tree_node*) (trans-mem.c:320) ==19617== by 0xC5E147: diagnose_tm_1(gimple_stmt_iterator*, bool*, walk_stmt_info*) (trans-mem.c:668) ==19617== by 0x9FC9CE: walk_gimple_stmt(gimple_stmt_iterator*, tree_node* (*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*), walk_stmt_info*) (gimple-walk.c:551) ==19617== by 0x9FCC08: walk_gimple_seq_mod(gimple_statement_base**, tree_node* (*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*), walk_stmt_info*) (gimple-walk.c:66) ==19617== by 0x9FCAB2: walk_gimple_stmt(gimple_stmt_iterator*, tree_node* (*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*), walk_stmt_info*) (gimple-walk.c:579) ==19617== by 0x9FCC08: walk_gimple_seq_mod(gimple_statement_base**, tree_node* (*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*), walk_stmt_info*) (gimple-walk.c:66) ==19617== by 0x9FCCA6: walk_gimple_seq(gimple_statement_base*, tree_node* (*)(gimple_stmt_iterator*, bool*, walk_stmt_info*), tree_node* (*)(tree_node**, int*, void*), walk_stmt_info*) (gimple-walk.c:96) ==19617== by 0xC5DEC2: diagnose_tm_blocks (trans-mem.c:862) ==19617== by 0xC5DEC2: (anonymous namespace)::pass_diagnose_tm_blocks::execute(function*) (trans-mem.c:891) ==19617== by 0xB5E85E: execute_one_pass(opt_pass*) (passes.c:2311) ==19617== by 0xB5ECD5: execute_pass_list_1(opt_pass*) [clone .constprop.73] (passes.c:2363) ==19617== by 0xB5ED28: execute_pass_list(function*, opt_pass*) (passes.c:2374) ==19617== Address 0x0 is not stack'd, malloc'd or (recently) free'd ==19617== testcase.c: In function 'foo': testcase.c:2:1: internal compiler error: Segmentation fault foo (void) ^ Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. Tested revisions: r219043 - ICE 4_9 r219040 - ICE 4_8 - ignoring #pragma GCC ivdep