https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110652
Bug ID: 110652
Summary: [14 Regression] bootstrap failure on
tree-vect-stmts.cc with --enable-checking=release:
error: 'new_temp' may be used uninitialized
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: slyfox at gcc dot gnu.org
Target Milestone: ---
Noticed build failure today when built r14-2495-g43ed05a08963a5 as:
$ ~/dev/git/gcc/configure --disable-multilib --enable-checking=release
$ make
...
/tmp/gb/./prev-gcc/xg++ -B/tmp/gb/./prev-gcc/
-B/usr/local/x86_64-pc-linux-gnu/bin/ -nostdinc++
-B/tmp/gb/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-B/tmp/gb/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/tmp/gb/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
-I/tmp/gb/prev-x86_64-pc-linux-gnu/libstdc++-v3/include
-I/home/slyfox/dev/git/gcc/libstdc++-v3/libsupc++
-L/tmp/gb/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/tmp/gb/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs -fno-PIE -c
-g -O2 -fno-checking -gtoggle -DIN_GCC -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Wconditionally-supported
-Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings -Werror -DHAVE_CONFIG_H -fno-PIE -I. -I.
-I/home/slyfox/dev/git/gcc/gcc -I/home/slyfox/dev/git/gcc/gcc/.
-I/home/slyfox/dev/git/gcc/gcc/../include
-I/home/slyfox/dev/git/gcc/gcc/../libcpp/include
-I/home/slyfox/dev/git/gcc/gcc/../libcody
-I/home/slyfox/dev/git/gcc/gcc/../libdecnumber
-I/home/slyfox/dev/git/gcc/gcc/../libdecnumber/bid -I../libdecnumber
-I/home/slyfox/dev/git/gcc/gcc/../libbacktrace -o tree-vect-stmts.o -MT
tree-vect-stmts.o -MMD -MP -MF ./.deps/tree-vect-stmts.TPo
/home/slyfox/dev/git/gcc/gcc/tree-vect-stmts.cc
In file included from /home/slyfox/dev/git/gcc/gcc/hash-table.h:248,
from /home/slyfox/dev/git/gcc/gcc/coretypes.h:486,
from /home/slyfox/dev/git/gcc/gcc/tree-vect-stmts.cc:24:
In member function 'T* vec<T, A, vl_embed>::quick_push(const T&) [with T =
tree_node*; A = va_heap]',
inlined from 'T* vec<T>::quick_push(const T&) [with T = tree_node*]' at
/home/slyfox/dev/git/gcc/gcc/vec.h:1987:28,
inlined from 'bool vectorizable_load(vec_info*, stmt_vec_info,
gimple_stmt_iterator*, gimple**, slp_tree, stmt_vector_for_cost*)' at
/home/slyfox/dev/git/gcc/gcc/tree-vect-stmts.cc:10962:23:
/home/slyfox/dev/git/gcc/gcc/vec.h:1023:9: error: 'new_temp' may be used
uninitialized [-Werror=maybe-uninitialized]
1023 | *slot = obj;
| ~~~~~~^~~~~
$ /tmp/gb/./prev-gcc/xg++ -B/tmp/gb/./prev-gcc/ -v
Reading specs from /tmp/gb/./prev-gcc/specs
COLLECT_GCC=/tmp/gb/./prev-gcc/xg++
COLLECT_LTO_WRAPPER=/tmp/gb/./prev-gcc/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /home/slyfox/dev/git/gcc/configure --disable-multilib
--enable-checking=release
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.0 20230713 (experimental) (GCC)
