gcc-gse-tattle

diff -r orig/gcc-7.4.0/gcc/tree-ssa-dse.c gcc-7.4.0/gcc/tree-ssa-dse.c
745c745,753
<         delete_dead_call (gsi);
---
>         {
>           if (DECL_FUNCTION_CODE (gimple_call_fndecl (stmt)) == BUILT_IN_MEMSET)
>             {
>               char const *file = gimple_filename(stmt);
>               int line_no = gimple_lineno(stmt);
>               fprintf(stderr, "%s:%d: optimized out memset\n", file, line_no);
>             }
>           delete_dead_call (gsi);
>         }