1 files changed, 16 insertions, 1 deletions
diff --git a/gcc/cfgrtl.c b/gcc/cfgrtl.c
index 36bc865916b..a2c0e0f2026 100644
--- a/gcc/cfgrtl.c
+++ b/gcc/cfgrtl.c
@@ -53,6 +53,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "toplev.h"
 #include "tm_p.h"
 #include "obstack.h"
+#include "insn-attr.h"
 #include "insn-config.h"
 #include "cfglayout.h"
 #include "expr.h"
@@ -408,13 +409,27 @@ free_bb_for_insn (void)
   return 0;
 }
 
+static unsigned int
+rest_of_pass_free_cfg (void)
+{
+#ifdef DELAY_SLOTS
+  /* The resource.c machinery uses DF but the CFG isn't guaranteed to be
+     valid at that point so it would be too late to call df_analyze.  */
+  if (optimize > 0 && flag_delayed_branch)
+    df_analyze ();
+#endif
+
+  free_bb_for_insn ();
+  return 0;
+}
+
 struct rtl_opt_pass pass_free_cfg =
 {
  {
   RTL_PASS,
   NULL,                                 /* name */
   NULL,                                 /* gate */
-  free_bb_for_insn,                     /* execute */
+  rest_of_pass_free_cfg,                /* execute */
   NULL,                                 /* sub */
   NULL,                                 /* next */
   0,                                    /* static_pass_number */