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[PATCH] Fix PR88019


Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.

Richard.

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.

diff --git a/gcc/graphite-isl-ast-to-gimple.c b/gcc/graphite-isl-ast-to-gimple.c
index 0d8960c6bb2..e2dbf6fbf9d 100644
--- a/gcc/graphite-isl-ast-to-gimple.c
+++ b/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


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