re PR target/84828 (ICE in verify_flow_info at gcc/cfghooks.c:265)

	PR target/84828
	* reg-stack.c (change_stack): Change update_end var from int to
	rtx_insn *, if non-NULL don't update just BB_END (current_block), but
	also call set_block_for_insn on the newly added insns and rescan.

	* g++.dg/ext/pr84828.C: New test.

From-SVN: r258476

gcc/ChangeLog

 2018-03-13  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/84828
+	* reg-stack.c (change_stack): Change update_end var from int to
+	rtx_insn *, if non-NULL don't update just BB_END (current_block), but
+	also call set_block_for_insn on the newly added insns and rescan.
+
 	PR target/84786
 	* config/i386/sse.md (sse2_loadhpd): Use Yv constraint rather than v
 	on the last operand.

gcc/reg-stack.c

@@ -2489,7 +2489,7 @@ change_stack (rtx_insn *insn, stack_ptr old, stack_ptr new_stack,
 	      enum emit_where where)
 {
   int reg;
-  int update_end = 0;
+  rtx_insn *update_end = NULL;
   int i;
 
   /* Stack adjustments for the first insn in a block update the
@@ -2511,7 +2511,7 @@ change_stack (rtx_insn *insn, stack_ptr old, stack_ptr new_stack,
   if (where == EMIT_AFTER)
     {
       if (current_block && BB_END (current_block) == insn)
-	update_end = 1;
+	update_end = insn;
       insn = NEXT_INSN (insn);
     }
 
@@ -2686,7 +2686,16 @@ change_stack (rtx_insn *insn, stack_ptr old, stack_ptr new_stack,
     }
 
   if (update_end)
-    BB_END (current_block) = PREV_INSN (insn);
+    {
+      for (update_end = NEXT_INSN (update_end); update_end != insn;
+	   update_end = NEXT_INSN (update_end))
+	{
+	  set_block_for_insn (update_end, current_block);
+	  if (INSN_P (update_end))
+	    df_insn_rescan (update_end);
+	}
+      BB_END (current_block) = PREV_INSN (insn);
+    }
 }
 
 /* Print stack configuration.  */

gcc/testsuite/ChangeLog

 2018-03-13  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/84828
+	* g++.dg/ext/pr84828.C: New test.
+
 	PR target/84786
 	* gcc.target/i386/avx512f-pr84786-1.c: New test.
 	* gcc.target/i386/avx512f-pr84786-2.c: New test.

gcc/testsuite/g++.dg/ext/pr84828.C

+// PR target/84828
+// { dg-do compile { target i?86-*-* x86_64-*-* } }
+// { dg-options "-Og -mno-sse2" }
+
+void
+foo (float b, double c)
+{
+  for (int e = 0; e < 2; e++)
+    {
+      asm volatile ("" : "+f" (c));	// { dg-error "must specify a single register" }
+      asm ("" : "+rm" (c = b));
+    }
+}