re PR tree-optimization/82264 (ICE in vn_phi_lookup at gcc/tree-ssa-sccvn.c:3125)

2017-09-20  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/82264
	* tree-ssa-sccvn.c (vn_phi_eq): Use safe_dyn_cast to check
	for GIMPLE_CONDs.
	(vn_phi_lookup): Likewise.
	(vn_phi_insert): Likewise.

	* gcc.dg/torture/pr82264.c: New testcase.

From-SVN: r253005

gcc/ChangeLog

+2017-09-20  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/82264
+	* tree-ssa-sccvn.c (vn_phi_eq): Use safe_dyn_cast to check
+	for GIMPLE_CONDs.
+	(vn_phi_lookup): Likewise.
+	(vn_phi_insert): Likewise.
+
 2017-09-20  Jakub Jelinek  <jakub@redhat.com>
 
 	* dwarf2out.c (tree_add_const_value_attribute): For INTEGER_CST

gcc/testsuite/ChangeLog

+2017-09-20  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/82264
+	* gcc.dg/torture/pr82264.c: New testcase.
+
 2017-09-20  Jakub Jelinek  <jakub@redhat.com>
 
 	* g++.dg/debug/dwarf2/template-params-13.C: New test.

gcc/testsuite/gcc.dg/torture/pr82264.c

+/* { dg-do compile } */
+
+char a;
+int c;
+unsigned b ();
+unsigned
+setjmp ()
+{
+}
+static void
+d ()
+{
+  if (b ())
+    c = 3;
+}
+void
+e ()
+{
+  d ();
+  a && ({ setjmp (); });
+}

gcc/tree-ssa-sccvn.c

@@ -3028,16 +3028,13 @@ vn_phi_eq (const_vn_phi_t const vp1, const_vn_phi_t const vp2)
 	      return false;
 
 	    /* Verify the controlling stmt is the same.  */
-	    gimple *last1 = last_stmt (idom1);
-	    gimple *last2 = last_stmt (idom2);
-	    if (gimple_code (last1) != GIMPLE_COND
-		|| gimple_code (last2) != GIMPLE_COND)
+	    gcond *last1 = safe_dyn_cast <gcond *> (last_stmt (idom1));
+	    gcond *last2 = safe_dyn_cast <gcond *> (last_stmt (idom2));
+	    if (! last1 || ! last2)
 	      return false;
 	    bool inverted_p;
-	    if (! cond_stmts_equal_p (as_a <gcond *> (last1),
-				      vp1->cclhs, vp1->ccrhs,
-				      as_a <gcond *> (last2),
-				      vp2->cclhs, vp2->ccrhs,
+	    if (! cond_stmts_equal_p (last1, vp1->cclhs, vp1->ccrhs,
+				      last2, vp2->cclhs, vp2->ccrhs,
 				      &inverted_p))
 	      return false;
 
@@ -3122,7 +3119,7 @@ vn_phi_lookup (gimple *phi)
   vp1.ccrhs = NULL_TREE;
   basic_block idom1 = get_immediate_dominator (CDI_DOMINATORS, vp1.block);
   if (EDGE_COUNT (idom1->succs) == 2)
-    if (gcond *last1 = dyn_cast <gcond *> (last_stmt (idom1)))
+    if (gcond *last1 = safe_dyn_cast <gcond *> (last_stmt (idom1)))
       {
 	vp1.cclhs = vn_valueize (gimple_cond_lhs (last1));
 	vp1.ccrhs = vn_valueize (gimple_cond_rhs (last1));
@@ -3168,7 +3165,7 @@ vn_phi_insert (gimple *phi, tree result)
   vp1->ccrhs = NULL_TREE;
   basic_block idom1 = get_immediate_dominator (CDI_DOMINATORS, vp1->block);
   if (EDGE_COUNT (idom1->succs) == 2)
-    if (gcond *last1 = dyn_cast <gcond *> (last_stmt (idom1)))
+    if (gcond *last1 = safe_dyn_cast <gcond *> (last_stmt (idom1)))
       {
 	vp1->cclhs = vn_valueize (gimple_cond_lhs (last1));
 	vp1->ccrhs = vn_valueize (gimple_cond_rhs (last1));