[Bug c/115876] New: runtime errors during bootstrap with -O3 -march=znver3 -fno-var-tracking-assignments

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115876

            Bug ID: 115876
           Summary: runtime errors during bootstrap with -O3 -march=znver3
                    -fno-var-tracking-assignments
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

For a bootstrap with this configure script:

../trunk/configure \
    --disable-multilib \
    --disable-werror \
    --with-build-config=bootstrap-asan \
    --with-build-config=bootstrap-ubsan \
    --enable-checking=yes \
    --enable-languages=c,c++,fortran

sed 's;-O2;-O3 -march=znver3 -fno-var-tracking-assignments;' < Makefile >
Makefile.tmp
diff Makefile Makefile.tmp
mv Makefile.tmp Makefile

I get:

$ grep error: mk.out
../../trunk/gcc/ext-dce.cc:404:23: runtime error: left shift of negative value
-1
../../trunk/gcc/ext-dce.cc:417:33: runtime error: left shift of negative value
-1
../../trunk/gcc/ext-dce.cc:404:23: runtime error: left shift of negative value
-1
../../trunk/gcc/ext-dce.cc:417:33: runtime error: left shift of negative value
-1
../../trunk/gcc/ext-dce.cc:404:23: runtime error: left shift of negative value
-1
../../trunk/gcc/ext-dce.cc:404:23: runtime error: left shift of negative value
-1
../../trunk/gcc/ext-dce.cc:404:23: runtime error: left shift of negative value
-1
../../trunk/gcc/ext-dce.cc:404:23: runtime error: left shift of negative value
-1
../../trunk/gcc/ext-dce.cc:417:33: runtime error: left shift of negative value
-1
../../trunk/gcc/ext-dce.cc:600:15: runtime error: shift exponent 64 is too
large for 64-bit type 'long unsigned int'