Command line: $ gcc -O2 -fcompare-debug testcase.c Valgrind output: $ valgrind -q --trace-children=yes /mnt/svn/gcc-trunk/binary-162222-lto-fortran-checking-yes-rtl-df/bin/gcc -O2 -fcompare-debug testcase.c testcase.c: In function '_XftCloseint': testcase.c:21:3: warning: passing argument 1 of '_XftintInfoGet' makes pointer from integer without a cast [enabled by default] testcase.c:12:6: note: expected 'int *' but argument is of type 'int' testcase.c:22:13: warning: assignment from incompatible pointer type [enabled by default] testcase.c:22:48: warning: assignment from incompatible pointer type [enabled by default] ==3128== Conditional jump or move depends on uninitialised value(s) ==3128== at 0x70BFBB: walk_gimple_stmt (gimple.c:1627) ==3128== by 0x955003: dump_enumerated_decls (tree-ssa-live.c:1264) ==3128== by 0x8F7B98: execute_cleanup_cfg_post_optimizing (tree-optimize.c:212) ==3128== by 0x7B777D: execute_one_pass (passes.c:1563) ==3128== by 0x7B7A14: execute_pass_list (passes.c:1618) ==3128== by 0x8F8525: tree_rest_of_compilation (tree-optimize.c:450) ==3128== by 0xAADBF5: cgraph_expand_function (cgraphunit.c:1629) ==3128== by 0xAB0A29: cgraph_optimize (cgraphunit.c:1708) ==3128== by 0xAB101A: cgraph_finalize_compilation_unit (cgraphunit.c:1171) ==3128== by 0x4DE632: c_write_global_declarations (c-decl.c:9698) ==3128== by 0x8A41E5: toplev_main (toplev.c:990) ==3128== by 0x6589BBC: (below main) (in /lib64/libc-2.11.2.so) ==3128== gcc: error: testcase.c: -fcompare-debug failure (length)
Tested revisions: r162222 - fail r162056 - fail r161659 - ICEs r161170 - OK -- Summary: -fcompare-debug failure with uninitialized read in walk_gimple_stmt Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: debug AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: zsojka at seznam dot cz GCC host triplet: x86_64-pc-linux-gnu GCC target triplet: x86_64-pc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44971