re PR rtl-optimization/92610 (ICE in calc_dfs_tree, at dominance.c:458 since r270940)

	PR rtl-optimization/92610
	* cse.c (rest_of_handle_cse2): Call cleanup_cfg (0) also if
	cse_cfg_altered is set, even when tem is 0.
	(rest_of_handle_cse_after_global_opts): Likewise.

	* g++.dg/opt/pr92610.C: New test.

From-SVN: r278640

gcc/ChangeLog

+2019-11-23  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/92610
+	* cse.c (rest_of_handle_cse2): Call cleanup_cfg (0) also if
+	cse_cfg_altered is set, even when tem is 0.
+	(rest_of_handle_cse_after_global_opts): Likewise.
+
 2019-11-22  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/92458

gcc/cse.c

@@ -7701,7 +7701,7 @@ rest_of_handle_cse2 (void)
       cse_cfg_altered |= cleanup_cfg (CLEANUP_CFG_CHANGED);
       timevar_pop (TV_JUMP);
     }
-  else if (tem == 1)
+  else if (tem == 1 || cse_cfg_altered)
     cse_cfg_altered |= cleanup_cfg (0);
 
   cse_not_expected = 1;
@@ -7775,7 +7775,7 @@ rest_of_handle_cse_after_global_opts (void)
       cse_cfg_altered |= cleanup_cfg (CLEANUP_CFG_CHANGED);
       timevar_pop (TV_JUMP);
     }
-  else if (tem == 1)
+  else if (tem == 1 || cse_cfg_altered)
     cse_cfg_altered |= cleanup_cfg (0);
 
   flag_cse_follow_jumps = save_cfj;

gcc/testsuite/ChangeLog

+2019-11-23  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/92610
+	* g++.dg/opt/pr92610.C: New test.
+
 2019-11-23  Bernd Edlinger  <bernd.edlinger@hotmail.de>
 
 	PR c++/92365

gcc/testsuite/g++.dg/opt/pr92610.C

+// PR rtl-optimization/92610
+// { dg-do compile }
+// { dg-options "-w -fdelete-dead-exceptions --param=sccvn-max-alias-queries-per-access=0 -fno-dse -fnon-call-exceptions -Os -funroll-loops -ftrapv" }
+
+struct C { int x; ~C () {} };
+
+int
+main ()
+{
+  C *buffer = new C[42];
+  buffer[-3].x = 42;
+  delete [] buffer;
+}