[Bug c++/61186] New: ./g++.dg/ipa/pr52939.C & valgrind & pointer_set_insert

["dcb314 at hotmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61186

            Bug ID: 61186
           Summary: ./g++.dg/ipa/pr52939.C & valgrind & pointer_set_insert
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com

For today's trunk build of gcc

$ valgrind -q --trace-children=yes ~/gcc/results/bin/gcc -c -O2 
./g++.dg/ipa/pr52939.C
==1427== Use of uninitialised value of size 8
==1427==    at 0x9C54B2: pointer_set_insert(pointer_set_t*, void const*)
(pointer-set.c:90)
==1427==    by 0x8FAB2E: symtab_remove_unreachable_nodes(bool, _IO_FILE*)
(ipa.c:180)
==1427==    by 0x754B5D: compile() [clone .part.29] (cgraphunit.c:2052)
==1427==    by 0x75525D: finalize_compilation_unit() (cgraphunit.c:2151)
==1427==    by 0x5B73DB: cp_write_global_declarations() (decl2.c:4626)
==1427==    by 0xA92CAC: compile_file() (toplev.c:562)
==1427==    by 0xA948F1: toplev_main(int, char**) (toplev.c:1915)
==1427==    by 0x32C5E21D64: (below main) (libc-start.c:285)
==1427== 
==1427== Conditional jump or move depends on uninitialised value(s)
==1427==    at 0x9C54B8: pointer_set_insert(pointer_set_t*, void const*)
(pointer-set.c:90)
==1427==    by 0x8FAB2E: symtab_remove_unreachable_nodes(bool, _IO_FILE*)
(ipa.c:180)
==1427==    by 0x754B5D: compile() [clone .part.29] (cgraphunit.c:2052)
==1427==    by 0x75525D: finalize_compilation_unit() (cgraphunit.c:2151)
==1427==    by 0x5B73DB: cp_write_global_declarations() (decl2.c:4626)
==1427==    by 0xA92CAC: compile_file() (toplev.c:562)
==1427==    by 0xA948F1: toplev_main(int, char**) (toplev.c:1915)
==1427==    by 0x32C5E21D64: (below main) (libc-start.c:285)
==1427== 
==1427== Use of uninitialised value of size 8
==1427==    at 0x9C54C8: pointer_set_insert(pointer_set_t*, void const*)
(pointer-set.c:150)
==1427==    by 0x8FAB2E: symtab_remove_unreachable_nodes(bool, _IO_FILE*)
(ipa.c:180)
==1427==    by 0x754B5D: compile() [clone .part.29] (cgraphunit.c:2052)
==1427==    by 0x75525D: finalize_compilation_unit() (cgraphunit.c:2151)
==1427==    by 0x5B73DB: cp_write_global_declarations() (decl2.c:4626)
==1427==    by 0xA92CAC: compile_file() (toplev.c:562)
==1427==    by 0xA948F1: toplev_main(int, char**) (toplev.c:1915)
==1427==    by 0x32C5E21D64: (below main) (libc-start.c:285)
==1427== 

$ ~/gcc/results/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/home/dcb/gcc/results/bin/gcc
COLLECT_LTO_WRAPPER=/home/dcb/gcc/results/libexec/gcc/x86_64-unknown-linux-gnu/4.10.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../src/trunk/configure --prefix=/home/dcb/gcc/results
--enable-checking=release --enable-languages=c,c++,fortran --disable-werror
Thread model: posix
gcc version 4.10.0 20140514 (experimental) (GCC) 
[dcb@zippy4 testsuite]$