[Bug middle-end/113205] New: [14 Regression] internal compiler error: in backward_pass, at tree-vect-slp.cc:5346

["doko at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113205

            Bug ID: 113205
           Summary: [14 Regression] internal compiler error: in
                    backward_pass, at tree-vect-slp.cc:5346
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at gcc dot gnu.org
  Target Milestone: ---

seen with trunk 20240101 on x86_64-linux-gnu, building the mlt package. It
claims to be not reproducible, but always fails to build.

[ 31%] Building C object src/modules/gdk/CMakeFiles/mltgdk.dir/pixops.c.o
cd /home/packages/gcc/tmp/mlt-7.22.0/obj-x86_64-linux-gnu/src/modules/gdk &&
/usr/bin/cc -DARCH_X86_64 -DUSE_EXIF -DUSE_MMX -DUSE_PANGO -DUSE_PIXBUF
-Dmltgdk_EXPORTS -I/home/packages/gcc/tmp/mlt-7.22.0/src/framework/.. -isystem
/usr/include/gdk-pixbuf-2.0 -isystem /usr/include/glib-2.0 -isystem
/usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /usr/include/libpng16
-isystem /usr/include/webp -isystem /usr/include/libmount -isystem
/usr/include/blkid -isystem /usr/include/pango-1.0 -isystem
/usr/include/harfbuzz -isystem /usr/include/freetype2 -isystem
/usr/include/fribidi -isystem /usr/include/cairo -isystem /usr/include/pixman-1
-g -O2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
-ffile-prefix-map=/home/packages/gcc/tmp/mlt-7.22.0=. -flto=auto
-ffat-lto-objects -fstack-protector-strong -fstack-clash-protection -Wformat
-Werror=format-security -fcf-protection
-fdebug-prefix-map=/home/packages/gcc/tmp/mlt-7.22.0=/usr/src/mlt-7.22.0-1
-Wdate-time -D_FORTIFY_SOURCE=3 -std=gnu11 -fPIC -mmmx -msse -msse2 -pthread
-MD -MT src/modules/gdk/CMakeFiles/mltgdk.dir/pixops.c.o -MF
CMakeFiles/mltgdk.dir/pixops.c.o.d -o CMakeFiles/mltgdk.dir/pixops.c.o -c
/home/packages/gcc/tmp/mlt-7.22.0/src/modules/gdk/pixops.c
during GIMPLE pass: slp
/home/packages/gcc/tmp/mlt-7.22.0/src/modules/gdk/pixops.c: In function
'scale_line_22_yuv':
/home/packages/gcc/tmp/mlt-7.22.0/src/modules/gdk/pixops.c:188:1: internal
compiler error: in backward_pass, at tree-vect-slp.cc:5346
  188 | scale_line_22_yuv ( int *weights, int n_x, int n_y,
      | ^~~~~~~~~~~~~~~~~
0xff857e vect_optimize_slp_pass::backward_pass()
        ../../src/gcc/tree-vect-slp.cc:5346
0x21d18aa vect_optimize_slp_pass::run()
        ../../src/gcc/tree-vect-slp.cc:5768
0x1fa5f52 vect_optimize_slp(vec_info*)
        ../../src/gcc/tree-vect-slp.cc:5787
0x1fa5f52 vect_optimize_slp(vec_info*)
        ../../src/gcc/tree-vect-slp.cc:5783
0x1de839d vect_slp_analyze_bb_1
        ../../src/gcc/tree-vect-slp.cc:7579
0x1de839d vect_slp_region
        ../../src/gcc/tree-vect-slp.cc:7667
0x1de44d9 vect_slp_bbs
        ../../src/gcc/tree-vect-slp.cc:7878
0x1de1ccd vect_slp_function(function*)
        ../../src/gcc/tree-vect-slp.cc:8000
0x1de18dc execute
        ../../src/gcc/tree-vectorizer.cc:1533
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-14/README.Bugs> for instructions.
The bug is not reproducible, so it is likely a hardware or OS problem.
make[3]: *** [src/modules/gdk/CMakeFiles/mltgdk.dir/build.make:107:
src/modules/gdk/CMakeFiles/mltgdk.dir/pixops.c.o] Error 1