https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119728
Bug ID: 119728
Summary: wrong code with _BitInt() and -O2 -floop-nest-optimize
-fno-tree-dominator-opts
-fno-tree-loop-distribute-patterns
-fno-tree-scev-cprop
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 61073
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61073&action=edit
reduced testcase
This needs the experimental -floop-nest-optimize
Output:
$ x86_64-pc-linux-gnu-gcc testcase.c -O2 -floop-nest-optimize
-fno-tree-dominator-opts -fno-tree-loop-distribute-patterns
-fno-tree-scev-cprop
$ ./a.out
Aborted
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-20250411084350-r15-9377-g3b33d792cf1e4d-checking-release-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/15.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=release
--disable-bootstrap --with-cloog --with-ppl --with-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --enable-libsanitizer
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20250411084350-r15-9377-g3b33d792cf1e4d-checking-release-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.1 20250411 (experimental) (GCC)
