re PR c/53968 (integer undefined behaviors in GCC)

	PR c/53968
	* tree.c (integer_pow2p): Avoid undefined signed overflows.
	* simplify-rtx.c (neg_const_int): Likewise.
	* expr.c (fixup_args_size_notes): Likewise.
	* stor-layout.c (set_min_and_max_values_for_integral_type): Likewise.
	* double-int.c (mul_double_wide_with_sign): Likewise.
	(double_int_mask): Likewise.
	* tree-ssa-loop-ivopts.c (get_address_cost): Likewise.

From-SVN: r190342

1 files changed, 1 insertions, 1 deletions

diff --git a/gcc/tree.c b/gcc/tree.c
index 6e864c3..279850a 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -1849,7 +1849,7 @@ int
 integer_pow2p (const_tree expr)
 {
   int prec;
-  HOST_WIDE_INT high, low;
+  unsigned HOST_WIDE_INT high, low;
 
   STRIP_NOPS (expr);