Merge revs 1.2 (-fformat-extensions), 1.7 (FORCE_OPTIMIZATION_DOWNGRADE knob),

1.14 (-O/-O1 optimize alignment for time, not size).

Back out r1.22 which used to enable warnings in system headers by
default.

1 files changed, 20 insertions, 2 deletions

diff --git a/contrib/gcc/toplev.c b/contrib/gcc/toplev.c
index 60a6bca..5947f6f 100644
--- a/contrib/gcc/toplev.c
+++ b/contrib/gcc/toplev.c
@@ -1410,7 +1410,7 @@ int inhibit_warnings = 0;
 
 /* Don't suppress warnings from system headers.  -Wsystem-headers.  */
 
-int warn_system_headers = 1;
+int warn_system_headers = 0;
 
 /* Print various extra warnings.  -W.  */
 
@@ -2823,7 +2823,8 @@ rest_of_compilation (decl)
       tem = cse_main (insns, max_reg_num (), 0, rtl_dump_file);
       if (tem)
 	rebuild_jump_labels (insns);
-      purge_all_dead_edges (0);
+      if (purge_all_dead_edges (0))
+	delete_unreachable_blocks ();
 
       delete_trivially_dead_insns (insns, max_reg_num ());
 
@@ -3468,6 +3469,23 @@ rest_of_compilation (decl)
 #endif
 
 #ifdef STACK_REGS
+#if defined (HAVE_ATTR_length)
+  /* If flow2 creates new instructions which need splitting
+     and scheduling after reload is not done, they might not be
+     splitten until final which doesn't allow splitting
+     if HAVE_ATTR_length.  */
+#ifdef INSN_SCHEDULING
+  if (optimize && !flag_schedule_insns_after_reload)
+#else
+  if (optimize)
+#endif
+    {
+      timevar_push (TV_SHORTEN_BRANCH);
+      split_all_insns (1);
+      timevar_pop (TV_SHORTEN_BRANCH);
+    }
+#endif
+
   timevar_push (TV_REG_STACK);
   open_dump_file (DFI_stack, decl);