@@ -6454,15 +6454,19 @@ fold_truth_andor_1 (location_t loc, enum
size_int (xll_bitpos));
rl_mask = const_binop (LSHIFT_EXPR, fold_convert_loc (loc, lntype, rl_mask),
size_int (xrl_bitpos));
+ if (ll_mask == NULL_TREE || rl_mask == NULL_TREE)
+ return 0;
if (l_const)
{
l_const = fold_convert_loc (loc, lntype, l_const);
l_const = unextend (l_const, ll_bitsize, ll_unsignedp, ll_and_mask);
l_const = const_binop (LSHIFT_EXPR, l_const, size_int (xll_bitpos));
+ if (l_const == NULL_TREE)
+ return 0;
if (! integer_zerop (const_binop (BIT_AND_EXPR, l_const,
fold_build1_loc (loc, BIT_NOT_EXPR,
- lntype, ll_mask))))
+ lntype, ll_mask))))
{
warning (0, "comparison is always %d", wanted_code == NE_EXPR);
@@ -6474,9 +6478,11 @@ fold_truth_andor_1 (location_t loc, enum
r_const = fold_convert_loc (loc, lntype, r_const);
r_const = unextend (r_const, rl_bitsize, rl_unsignedp, rl_and_mask);
r_const = const_binop (LSHIFT_EXPR, r_const, size_int (xrl_bitpos));
+ if (r_const == NULL_TREE)
+ return 0;
if (! integer_zerop (const_binop (BIT_AND_EXPR, r_const,
fold_build1_loc (loc, BIT_NOT_EXPR,
- lntype, rl_mask))))
+ lntype, rl_mask))))
{
warning (0, "comparison is always %d", wanted_code == NE_EXPR);
@@ -6521,6 +6527,8 @@ fold_truth_andor_1 (location_t loc, enum
rr_mask = const_binop (LSHIFT_EXPR, fold_convert_loc (loc,
rntype, rr_mask),
size_int (xrr_bitpos));
+ if (lr_mask == NULL_TREE || rr_mask == NULL_TREE)
+ return 0;
/* Make a mask that corresponds to both fields being compared.
Do this for both items being compared. If the operands are the
@@ -6580,6 +6588,8 @@ fold_truth_andor_1 (location_t loc, enum
size_int (MIN (xll_bitpos, xrl_bitpos)));
lr_mask = const_binop (RSHIFT_EXPR, lr_mask,
size_int (MIN (xlr_bitpos, xrr_bitpos)));
+ if (ll_mask == NULL_TREE || lr_mask == NULL_TREE)
+ return 0;
/* Convert to the smaller type before masking out unwanted bits. */
type = lntype;
@@ -0,0 +1,10 @@
+/* PR middle-end/103813 */
+
+struct A { char b; char c[0x21000000]; };
+struct A d;
+
+int
+foo ()
+{
+ return d.c[0x20000000] || d.c[1];
+}