[Bug rtl-optimization/79386] [7 Regression] ICE: segmentation fault in cprop w/ -O2 on 32-bit BE powerpc

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79386

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
--- cprop.c.jj2 2017-01-30 09:31:48.000000000 +0100
+++ cprop.c     2017-02-06 14:09:24.316978439 +0100
@@ -1697,7 +1697,6 @@ bypass_conditional_jumps (void)
   if (ENTRY_BLOCK_PTR_FOR_FN (cfun)->next_bb == EXIT_BLOCK_PTR_FOR_FN (cfun))
     return 0;

-  bypass_last_basic_block = last_basic_block_for_fn (cfun);
   mark_dfs_back_edges ();

   changed = 0;
@@ -1863,6 +1862,8 @@ one_cprop_pass (void)
              }
        }

+      bypass_last_basic_block = last_basic_block_for_fn (cfun);
+
       while (!uncond_traps.is_empty ())
        {
          rtx_insn *insn = uncond_traps.pop ();

fixes the ICE, the basic blocks after the unconditional traps should be dead
code, so no point in transforming anything in those anyway.