[Bug tree-optimization/113576] [14 regression] 502.gcc_r hangs r14-8223-g1c1853a70f9422169190e65e568dcccbce02d95c

[liuhongt at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113576

--- Comment #8 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---

maybe 

diff --git a/gcc/fold-const.cc b/gcc/fold-const.cc
index 1fd957288d4..6d321f9baef 100644
--- a/gcc/fold-const.cc
+++ b/gcc/fold-const.cc
@@ -8035,6 +8035,9 @@ native_encode_vector_part (const_tree expr, unsigned char
*ptr, int len,
       unsigned int extract_elts = extract_bytes * elts_per_byte;
       for (unsigned int i = 0; i < extract_elts; ++i)
        {
+         /* Don't encode any bit beyond the range of the vector.  */
+         if (first_elt + i > count)
+           break;