re PR tree-optimization/92401 (ICE in fold_ternary_loc, at fold-const.c:11698)

	PR tree-optimization/92401
	* gimple-match-head.c (gimple_resimplify1): Call const_unop only
	if res_op->code is an expression with code length 1.
	* gimple-match-head.c (gimple_resimplify2): Call const_binop only
	if res_op->code is an expression with code length 2.
	* gimple-match-head.c (gimple_resimplify3): Call fold_ternary only
	if res_op->code is an expression with code length 3.

	* g++.dg/opt/pr92401.C: New test.

From-SVN: r278004

gcc/ChangeLog

+2019-11-09  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/92401
+	* gimple-match-head.c (gimple_resimplify1): Call const_unop only
+	if res_op->code is an expression with code length 1.
+	* gimple-match-head.c (gimple_resimplify2): Call const_binop only
+	if res_op->code is an expression with code length 2.
+	* gimple-match-head.c (gimple_resimplify3): Call fold_ternary only
+	if res_op->code is an expression with code length 3.
+
 2019-11-09  Iain Sandoe  <iain@sandoe.co.uk>
 
 	* config/darwin.c (machopic_mcount_stub_name): Validate the

gcc/gimple-match-head.c

@@ -191,7 +191,12 @@ gimple_resimplify1 (gimple_seq *seq, gimple_match_op *res_op,
     {
       tree tem = NULL_TREE;
       if (res_op->code.is_tree_code ())
-	tem = const_unop (res_op->code, res_op->type, res_op->ops[0]);
+	{
+	  tree_code code = res_op->code;
+	  if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code))
+	      && TREE_CODE_LENGTH (code) == 1)
+	    tem = const_unop (res_op->code, res_op->type, res_op->ops[0]);
+	}
       else
 	tem = fold_const_call (combined_fn (res_op->code), res_op->type,
 			       res_op->ops[0]);
@@ -252,8 +257,13 @@ gimple_resimplify2 (gimple_seq *seq, gimple_match_op *res_op,
     {
       tree tem = NULL_TREE;
       if (res_op->code.is_tree_code ())
-	tem = const_binop (res_op->code, res_op->type,
-			   res_op->ops[0], res_op->ops[1]);
+	{
+	  tree_code code = res_op->code;
+	  if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code))
+	      && TREE_CODE_LENGTH (code) == 2)
+	    tem = const_binop (res_op->code, res_op->type,
+			       res_op->ops[0], res_op->ops[1]);
+	}
       else
 	tem = fold_const_call (combined_fn (res_op->code), res_op->type,
 			       res_op->ops[0], res_op->ops[1]);
@@ -325,9 +335,14 @@ gimple_resimplify3 (gimple_seq *seq, gimple_match_op *res_op,
     {
       tree tem = NULL_TREE;
       if (res_op->code.is_tree_code ())
-	tem = fold_ternary/*_to_constant*/ (res_op->code, res_op->type,
-					    res_op->ops[0], res_op->ops[1],
-					    res_op->ops[2]);
+	{
+	  tree_code code = res_op->code;
+	  if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code))
+	      && TREE_CODE_LENGTH (code) == 3)
+	    tem = fold_ternary/*_to_constant*/ (res_op->code, res_op->type,
+						res_op->ops[0], res_op->ops[1],
+						res_op->ops[2]);
+	}
       else
 	tem = fold_const_call (combined_fn (res_op->code), res_op->type,
 			       res_op->ops[0], res_op->ops[1], res_op->ops[2]);

gcc/testsuite/ChangeLog

+2019-11-09  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/92401
+	* g++.dg/opt/pr92401.C: New test.
+
 2019-11-09  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
 	PR fortran/92321

gcc/testsuite/g++.dg/opt/pr92401.C

+// PR tree-optimization/92401
+// { dg-do compile { target c++11 } }
+// { dg-options "-O2" }
+
+typedef float V __attribute__ ((__vector_size__ (4 * sizeof (float))));
+
+V v;
+
+void
+foo ()
+{
+  int i;
+  for (i = 0; i < 11; ++i)
+    v = V { 0.0f, 0.0f, (float) i, 0.0f };
+}