https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126930
Bug ID: 126930
Summary: valgrind error in pt_solution_includes_global
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
I just tried a valgrind build of gcc trunk. It said:
/home/dcb42/gcc/working/./gcc/xgcc -B/home/dcb42/gcc/working/./gcc/
-B/home/dcb42/gcc/results.20260818.valgrind/x86_64-pc-linux-gnu/bin/
-B/home/dcb42/gcc/results.20260818.valgrind/x86_64-pc-linux-gnu/lib/ -isystem
/home/dcb42/gcc/results.20260818.valgrind/x86_64-pc-linux-gnu/include -isystem
/home/dcb42/gcc/results.20260818.valgrind/x86_64-pc-linux-gnu/sys-include -g
-O2 -O2 -g -O2 -DIN_GCC -W -Wall -Wno-error=narrowing -Wwrite-strings
-Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition
-isystem ./include -fpic -mlong-double-80 -DUSE_ELF_SYMVER -fcf-protection
-mshstk -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -fpic
-mlong-double-80 -DUSE_ELF_SYMVER -fcf-protection -mshstk -I. -I. -I../.././gcc
-I../../../trunk/libgcc -I../../../trunk/libgcc/.
-I../../../trunk/libgcc/../gcc -I../../../trunk/libgcc/../include
-I../../../trunk/libgcc/config/i386 -I../../../trunk/libgcc/config/libbid
-DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS -DUSE_TLS -o _mulvdi3.o -MT
_mulvdi3.o -MD -MP -MF _mulvdi3.dep -DL_mulvdi3 -c
../../../trunk/libgcc/libgcc2.c -fvisibility=hidden -DHIDE_EXPORTS
==2632228== Conditional jump or move depends on uninitialised value(s)
==2632228== at 0xDB47BC: pt_solution_includes_global(pt_solution*, bool)
(tree-ssa-structalias.cc:1113)
==2632228== by 0x89CEB1: points_to_local_or_readonly_memory_p(tree_node*)
[clone .part.0] (ipa-fnsummary.cc:2662)
==2632228== by 0x8A827F: points_to_local_or_readonly_memory_p
(ipa-fnsummary.cc:2649)
Configure script is
CFLAGS="-g1 -O3 -march=native -Wall"
CXXFLAGS="-g1 -O3 -march=native -Wall"
../trunk/configure --prefix=$HOME/gcc/results.$DATE.valgrind \
--disable-bootstrap \
--disable-doc \
--disable-multilib \
--with-pkgversion=$HASH \
--enable-checking=valgrind \
--enable-languages=c,c++,fortran
native is znver3.
The valgrind error happens quite a way into the build.
$ grep "^Config" mk.out
Configuring in build-x86_64-pc-linux-gnu/libiberty
Configuring in build-x86_64-pc-linux-gnu/libcpp
Configuring in build-x86_64-pc-linux-gnu/fixincludes
Configuring in ./libcody
Configuring in ./zlib
Configuring in ./libiberty
Configuring in ./libdecnumber
Configuring in ./c++tools
Configuring in ./lto-plugin
Configuring in ./libbacktrace
Configuring in ./fixincludes
Configuring in ./libcpp
Configuring in ./gcc
Configuring in ./libcc1
Configuring in x86_64-pc-linux-gnu/libgcc
$
git blame says:
11924f8b487d gcc/tree-ssa-structalias.c (Richard Biener 2013-11-15
14:48:22 +0000 1113) || pt->vars_contains_nonlocal
