toplev.c (rest_of_compilation): Don't call save_for_inline_copy if all we're doing...

        * toplev.c (rest_of_compilation): Don't call save_for_inline_copy
        if all we're doing is dealing with -Wreturn-type.

From-SVN: r17104

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fd9ca7f9798c4a6959890b344f95b2798bab9be6..44b7c09b3f38af52d43c268090e2711b1357eafb 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+Mon Dec 15  Mark Mitchell  <mmitchell@usa.net> 11:41:32 1997
+
+       * toplev.c (rest_of_compilation): Don't call save_for_inline_copy
+       if all we're doing is dealing with -Wreturn-type.
+
 Mon Dec 15 09:44:39 1997  Richard Henderson  <rth@cygnus.com>
 
        * alpha.md (zero_extendqihi2, zero_extendqisi2, zero_extendqidi2):

diff --git a/gcc/toplev.c b/gcc/toplev.c
index 7f95a7d11b3ecf40e92577e6d2fd53b27175757a..a2d3f81801b4ab32ef1cac702ecfc524b13720bc 100644 (file)
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -3120,35 +3120,48 @@ rest_of_compilation (decl)
        {
          DECL_DEFER_OUTPUT (decl) = 1;
 
-         /* If -Wreturn-type, we have to do a bit of compilation.  */
-         if (! warn_return_type)
+         /* If -Wreturn-type, we have to do a bit of compilation.
+            However, if we just fall through we will call
+            save_for_inline_copying() which results in excessive
+            memory use.  Instead, we just want to call
+            jump_optimize() to figure out whether or not we can fall
+            off the end of the function; we do the minimum amount of
+            work necessary to make that safe.  And, we set optimize
+            to zero to keep jump_optimize from working too hard.  */
+         if (warn_return_type)
            {
+             int saved_optimize = optimize;
+             optimize = 0;
+             find_exception_handler_labels ();
+             jump_optimize (get_insns(), 0, 0, 0);
+             optimize = saved_optimize;
+           }
+
 #ifdef DWARF_DEBUGGING_INFO
-             /* Generate the DWARF info for the "abstract" instance
-                of a function which we may later generate inlined and/or
-                out-of-line instances of.  */
-             if (write_symbols == DWARF_DEBUG)
-               {
-                 set_decl_abstract_flags (decl, 1);
-                 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
-                 set_decl_abstract_flags (decl, 0);
-               }
+         /* Generate the DWARF info for the "abstract" instance
+            of a function which we may later generate inlined and/or
+            out-of-line instances of.  */
+         if (write_symbols == DWARF_DEBUG)
+           {
+             set_decl_abstract_flags (decl, 1);
+             TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
+             set_decl_abstract_flags (decl, 0);
+           }
 #endif
 #ifdef DWARF2_DEBUGGING_INFO
-             /* Generate the DWARF2 info for the "abstract" instance
-                of a function which we may later generate inlined and/or
-                out-of-line instances of.  */
-             if (write_symbols == DWARF2_DEBUG)
-               {
-                 set_decl_abstract_flags (decl, 1);
-                 TIMEVAR (symout_time, dwarf2out_decl (decl));
-                 set_decl_abstract_flags (decl, 0);
-               }
-#endif
-             TIMEVAR (integration_time, save_for_inline_nocopy (decl));
-             RTX_INTEGRATED_P (DECL_SAVED_INSNS (decl)) = inlinable;
-             goto exit_rest_of_compilation;
+         /* Generate the DWARF2 info for the "abstract" instance
+            of a function which we may later generate inlined and/or
+            out-of-line instances of.  */
+         if (write_symbols == DWARF2_DEBUG)
+           {
+             set_decl_abstract_flags (decl, 1);
+             TIMEVAR (symout_time, dwarf2out_decl (decl));
+             set_decl_abstract_flags (decl, 0);
            }
+#endif
+         TIMEVAR (integration_time, save_for_inline_nocopy (decl));
+         RTX_INTEGRATED_P (DECL_SAVED_INSNS (decl)) = inlinable;
+         goto exit_rest_of_compilation;
        }
 
       /* If we have to compile the function now, save its rtl and subdecls