re PR tree-optimization/88019 (ICE in gimplify_modify_expr, at gimplify.c:5779)

2018-11-14  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/88019
	* graphite-isl-ast-to-gimple.c (ternary_op_to_tree): Rewrite
	COND_EXPR arguments to non-trapping overflow.

From-SVN: r266105

gcc/ChangeLog

+2018-11-14  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/88019
+	* graphite-isl-ast-to-gimple.c (ternary_op_to_tree): Rewrite
+	COND_EXPR arguments to non-trapping overflow.
+
 2018-11-14  Claudiu Zissulescu  <claziss@synopsys.com>
 
 	* config/arc/arc.h (reg_class): Reorder registers classes, remove

gcc/graphite-isl-ast-to-gimple.c

@@ -411,7 +411,9 @@ ternary_op_to_tree (tree type, __isl_take isl_ast_expr *expr, ivs_params &ip)
   if (codegen_error_p ())
     return NULL_TREE;
 
-  return fold_build3 (COND_EXPR, type, a, b, c);
+  return fold_build3 (COND_EXPR, type, a,
+		      rewrite_to_non_trapping_overflow (b),
+		      rewrite_to_non_trapping_overflow (c));
 }
 
 /* Converts a unary isl_ast_expr_op expression E to a GCC expression tree of