https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68438
Bug ID: 68438
Summary: [6 Regression] Conditional jump or move depends on
uninitialised value in location_adhoc_data_eq
(line-map.c:89)
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: objc
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Hi.
Looks objc test-suite contains many valgrind errors:
Command:
valgrind --leak-check=yes --trace-children=yes --num-callers=100 gcc
/home/marxin/Programming/gcc/gcc/testsuite/objc.dg/call-super-2.m -c
==8665== Conditional jump or move depends on uninitialised value(s)
==8665== at 0x169A8D6: location_adhoc_data_eq(void const*, void const*)
(line-map.c:89)
==8665== by 0x16CDB3C: htab_find_slot_with_hash (hashtab.c:679)
==8665== by 0x169B5DC: get_combined_adhoc_loc(line_maps*, unsigned int,
source_range, void*) (line-map.c:214)
==8665== by 0xFFEAE9: COMBINE_LOCATION_DATA(line_maps*, unsigned int,
source_range, void*) (line-map.h:1004)
==8665== by 0xFFCE0B: set_source_range(tree_node*, source_range)
(tree.c:13936)
==8665== by 0xFFCD5A: set_source_range(tree_node*, unsigned int, unsigned
int) (tree.c:13923)
==8665== by 0x804E73: c_fully_fold_internal(tree_node*, bool, bool*, bool*,
bool) (c-common.c:1639)
==8665== by 0x803C7A: c_fully_fold_internal(tree_node*, bool, bool*, bool*,
bool) (c-common.c:1372)
==8665== by 0x803497: c_fully_fold(tree_node*, bool, bool*)
(c-common.c:1162)
==8665== by 0x7CA952: build_modify_expr(unsigned int, tree_node*,
tree_node*, tree_code, unsigned int, tree_node*, tree_node*) (c-typeck.c:5545)
==8665== by 0x7DA5F8: c_parser_expr_no_commas(c_parser*, c_expr*,
tree_node*) (c-parser.c:6149)
==8665== by 0x7E0CFF: c_parser_expression(c_parser*) (c-parser.c:8250)
==8665== by 0x7E0F38: c_parser_expression_conv(c_parser*) (c-parser.c:8283)
==8665== by 0x7D82FF: c_parser_statement_after_labels(c_parser*,
vec<tree_node*, va_heap, vl_ptr>*) (c-parser.c:5177)
==8665== by 0x7D781D: c_parser_compound_statement_nostart(c_parser*)
(c-parser.c:4762)
==8665== by 0x7D724D: c_parser_compound_statement(c_parser*)
(c-parser.c:4599)
==8665== by 0x7E1FFC: c_parser_objc_method_definition(c_parser*)
(c-parser.c:8821)
==8665== by 0x7D0FA9: c_parser_external_declaration(c_parser*)
(c-parser.c:1449)
==8665== by 0x7D0BF1: c_parser_translation_unit(c_parser*) (c-parser.c:1348)
==8665== by 0x7FB922: c_parse_file() (c-parser.c:17658)
==8665== by 0x850A92: c_common_parse_file() (c-opts.c:1064)
==8665== by 0xD41AF8: compile_file() (toplev.c:464)
==8665== by 0xD43F4F: do_compile() (toplev.c:1951)
==8665== by 0xD441CE: toplev::main(int, char**) (toplev.c:2058)
==8665== by 0x166391D: main (main.c:39)
==8665==
/home/marxin/Programming/gcc/gcc/testsuite/objc.dg/call-super-2.m:134:4:
warning: ‘-categ_instance_func2’ not found in protocol(s)
i += (size_t)[(id <Func>)self categ_instance_func2]; /* { dg-warning
".\\-categ_instance_func2. not found in protocol" } */
^
/home/marxin/Programming/gcc/gcc/testsuite/objc.dg/call-super-2.m:136:4:
warning: ‘TestsuiteObject’ may not respond to ‘-instance_func0’
return i + (size_t)[super instance_func0]; /* { dg-warning
".TestsuiteObject. may not respond to .\\-instance_func0." } */
^~~~~~
==8665== Use of uninitialised value of size 8
==8665== at 0x16CDA83: htab_find_slot_with_hash (hashtab.c:655)
==8665== by 0x169B5DC: get_combined_adhoc_loc(line_maps*, unsigned int,
source_range, void*) (line-map.c:214)
==8665== by 0xFFEAE9: COMBINE_LOCATION_DATA(line_maps*, unsigned int,
source_range, void*) (line-map.h:1004)
==8665== by 0xFFCD27: set_block(unsigned int, tree_node*) (tree.c:13914)
==8665== by 0x156A9C4: gimple_set_block(gimple*, tree_node*) (gimple.h:1744)
==8665== by 0x156B4A6: lower_stmt(gimple_stmt_iterator*, lower_data*)
(gimple-low.c:236)
==8665== by 0x156B3D8: lower_sequence(gimple**, lower_data*)
(gimple-low.c:203)
==8665== by 0x156B586: lower_stmt(gimple_stmt_iterator*, lower_data*)
(gimple-low.c:272)
==8665== by 0x156B3D8: lower_sequence(gimple**, lower_data*)
(gimple-low.c:203)
==8665== by 0x156B94E: lower_gimple_bind(gimple_stmt_iterator*, lower_data*)
(gimple-low.c:418)
==8665== by 0x156B0EB: lower_function_body() (gimple-low.c:107)
==8665== by 0x156B33C: (anonymous
namespace)::pass_lower_cf::execute(function*) (gimple-low.c:181)
==8665== by 0xC39BF9: execute_one_pass(opt_pass*) (passes.c:2335)
==8665== by 0xC39EFC: execute_pass_list_1(opt_pass*) (passes.c:2408)
==8665== by 0xC39F85: execute_pass_list(function*, opt_pass*)
(passes.c:2419)
==8665== by 0x904119: cgraph_node::analyze() (cgraphunit.c:634)
==8665== by 0x9051B9: analyze_functions(bool) (cgraphunit.c:1078)
==8665== by 0x908B48: symbol_table::finalize_compilation_unit()
(cgraphunit.c:2518)
==8665== by 0xD41B80: compile_file() (toplev.c:489)
==8665== by 0xD43F4F: do_compile() (toplev.c:1951)
==8665== by 0xD441CE: toplev::main(int, char**) (toplev.c:2058)
==8665== by 0x166391D: main (main.c:39)
==8665==
==8665== Use of uninitialised value of size 8
==8665== at 0x169B5E0: get_combined_adhoc_loc(line_maps*, unsigned int,
source_range, void*) (line-map.c:215)
==8665== by 0xFFEAE9: COMBINE_LOCATION_DATA(line_maps*, unsigned int,
source_range, void*) (line-map.h:1004)
==8665== by 0xFFCD27: set_block(unsigned int, tree_node*) (tree.c:13914)
==8665== by 0x156A9C4: gimple_set_block(gimple*, tree_node*) (gimple.h:1744)
==8665== by 0x156B4A6: lower_stmt(gimple_stmt_iterator*, lower_data*)
(gimple-low.c:236)
==8665== by 0x156B3D8: lower_sequence(gimple**, lower_data*)
(gimple-low.c:203)
==8665== by 0x156B586: lower_stmt(gimple_stmt_iterator*, lower_data*)
(gimple-low.c:272)
==8665== by 0x156B3D8: lower_sequence(gimple**, lower_data*)
(gimple-low.c:203)
==8665== by 0x156B94E: lower_gimple_bind(gimple_stmt_iterator*, lower_data*)
(gimple-low.c:418)
==8665== by 0x156B0EB: lower_function_body() (gimple-low.c:107)
==8665== by 0x156B33C: (anonymous
namespace)::pass_lower_cf::execute(function*) (gimple-low.c:181)
==8665== by 0xC39BF9: execute_one_pass(opt_pass*) (passes.c:2335)
==8665== by 0xC39EFC: execute_pass_list_1(opt_pass*) (passes.c:2408)
==8665== by 0xC39F85: execute_pass_list(function*, opt_pass*)
(passes.c:2419)
==8665== by 0x904119: cgraph_node::analyze() (cgraphunit.c:634)
==8665== by 0x9051B9: analyze_functions(bool) (cgraphunit.c:1078)
==8665== by 0x908B48: symbol_table::finalize_compilation_unit()
(cgraphunit.c:2518)
==8665== by 0xD41B80: compile_file() (toplev.c:489)
==8665== by 0xD43F4F: do_compile() (toplev.c:1951)
==8665== by 0xD441CE: toplev::main(int, char**) (toplev.c:2058)
==8665== by 0x166391D: main (main.c:39)
Thanks,
Martin
