[Bug tree-optimization/77880] [7 Regression] out of memory building recent LLVM on ppc64le with -O3

[bernds at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77880

--- Comment #2 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Hmm, a memcmp with ULONG_MAX as the size. Try this?

Index: expr.c
===================================================================
--- expr.c      (revision 240429)
+++ expr.c      (working copy)
@@ -785,7 +785,7 @@ by_pieces_ninsns (unsigned HOST_WIDE_INT
            case COMPARE_BY_PIECES:
              int batch = targetm.compare_by_pieces_branch_ratio (mode);
              int batch_ops = 4 * batch - 1;
-             int full = n_pieces / batch;
+             unsigned HOST_WIDE_INT full = n_pieces / batch;
              n_insns += full * batch_ops;
              if (n_pieces % batch != 0)
                n_insns++;