Command line:
$ gcc -Os -fsched-spec-load -fschedule-insns -fcompare-debug testcase.c
Valgrind output:
$ valgrind --trace-children=yes --track-origins=yes -q
/mnt/svn/gcc-trunk/binary-162653-lto-fortran-checking-yes-rtl-df/bin/gcc -Os
-fsched-spec-load -fschedule-insns -fcompare-debug testcase.c
==14681== Conditional jump or move depends on uninitialised value(s)
==14681== at 0x70F09B: walk_gimple_stmt (gimple.c:1627)
==14681== by 0x95F153: dump_enumerated_decls (tree-ssa-live.c:1264)
==14681== by 0x901718: execute_cleanup_cfg_post_optimizing
(tree-optimize.c:214)
==14681== by 0x7BD3EB: execute_one_pass (passes.c:1564)
==14681== by 0x7BD684: execute_pass_list (passes.c:1619)
==14681== by 0x9020A5: tree_rest_of_compilation (tree-optimize.c:452)
==14681== by 0xAB96E5: cgraph_expand_function (cgraphunit.c:1643)
==14681== by 0xABC579: cgraph_optimize (cgraphunit.c:1722)
==14681== by 0xABCB6A: cgraph_finalize_compilation_unit (cgraphunit.c:1185)
==14681== by 0x4DF86E: c_write_global_declarations (c-decl.c:9698)
==14681== by 0x8AB075: toplev_main (toplev.c:957)
==14681== by 0x6589BBC: (below main) (in /lib64/libc-2.11.2.so)
==14681== Uninitialised value was created by a stack allocation
==14681== at 0x95F0A0: dump_enumerated_decls (tree-ssa-live.c:1251)
==14681==
==15989== Conditional jump or move depends on uninitialised value(s)
==15989== at 0x70F09B: walk_gimple_stmt (gimple.c:1627)
==15989== by 0x95F153: dump_enumerated_decls (tree-ssa-live.c:1264)
==15989== by 0x901718: execute_cleanup_cfg_post_optimizing
(tree-optimize.c:214)
==15989== by 0x7BD3EB: execute_one_pass (passes.c:1564)
==15989== by 0x7BD684: execute_pass_list (passes.c:1619)
==15989== by 0x9020A5: tree_rest_of_compilation (tree-optimize.c:452)
==15989== by 0xAB96E5: cgraph_expand_function (cgraphunit.c:1643)
==15989== by 0xABC579: cgraph_optimize (cgraphunit.c:1722)
==15989== by 0xABCB6A: cgraph_finalize_compilation_unit (cgraphunit.c:1185)
==15989== by 0x4DF86E: c_write_global_declarations (c-decl.c:9698)
==15989== by 0x8AB075: toplev_main (toplev.c:957)
==15989== by 0x6589BBC: (below main) (in /lib64/libc-2.11.2.so)
==15989== Uninitialised value was created by a stack allocation
==15989== at 0x95F0A0: dump_enumerated_decls (tree-ssa-live.c:1251)
==15989==
gcc: error: testcase.c: -fcompare-debug failure
I don't know if the uninitialised read has anything to do with this problem.
Tested revisions:
r162653 - fail
r162456 - OK
--
Summary: -fcompare-debug failure with -Os -fsched-spec-load -
fschedule-insns
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
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=45130
