c-common.c (warn_for_sign_compare): Cast to unsigned when shifting a negative value.

	* c-common.c (warn_for_sign_compare): Cast to unsigned when shifting
	a negative value.

	* c-typeck.c (set_nonincremental_init_from_string): Use
	HOST_WIDE_INT_M1U when shifting a negative value.

	* rtlanal.c (split_double): Cast to unsigned when shifting a negative
	value.
	* sched-int.h (UNKNOWN_DEP_COST): Likewise.

From-SVN: r227743

gcc/ChangeLog

+2015-09-14  Marek Polacek  <polacek@redhat.com>
+
+	* rtlanal.c (split_double): Cast to unsigned when shifting a negative
+	value.
+	* sched-int.h (UNKNOWN_DEP_COST): Likewise.
+
 2015-09-11  Mark Wielaard  <mjw@redhat.com>
 
 	PR c/28901

gcc/c-family/ChangeLog

+2015-09-14  Marek Polacek  <polacek@redhat.com>
+
+	* c-common.c (warn_for_sign_compare): Cast to unsigned when shifting
+	a negative value.
+
 2015-09-11  Mark Wielaard  <mjw@redhat.com>
 
 	PR c/28901

gcc/c-family/c-common.c

@@ -12142,7 +12142,7 @@ warn_for_sign_compare (location_t location,
           if (bits < TYPE_PRECISION (result_type)
               && bits < HOST_BITS_PER_LONG && unsignedp)
             {
-              mask = (~ (HOST_WIDE_INT) 0) << bits;
+              mask = (~ (unsigned HOST_WIDE_INT) 0) << bits;
               if ((mask & constant) != mask)
 		{
 		  if (constant == 0)

gcc/c/ChangeLog

+2015-09-14  Marek Polacek  <polacek@redhat.com>
+
+	* c-typeck.c (set_nonincremental_init_from_string): Use
+	HOST_WIDE_INT_M1U when shifting a negative value.
+
 2015-09-09  Mark Wielaard  <mjw@redhat.com>
 
 	* c-typeck.c (build_binary_op): Check and warn when nonnull arg

gcc/c/c-typeck.c

@@ -8276,7 +8276,7 @@ set_nonincremental_init_from_string (tree str,
 	    {
 	      if (val[0] & (((HOST_WIDE_INT) 1) << (bitpos - 1)))
 		{
-		  val[0] |= ((HOST_WIDE_INT) -1) << bitpos;
+		  val[0] |= HOST_WIDE_INT_M1U << bitpos;
 		  val[1] = -1;
 		}
 	    }
@@ -8287,8 +8287,7 @@ set_nonincremental_init_from_string (tree str,
 	    }
 	  else if (val[1] & (((HOST_WIDE_INT) 1)
 			     << (bitpos - 1 - HOST_BITS_PER_WIDE_INT)))
-	    val[1] |= ((HOST_WIDE_INT) -1)
-		      << (bitpos - HOST_BITS_PER_WIDE_INT);
+	    val[1] |= HOST_WIDE_INT_M1U << (bitpos - HOST_BITS_PER_WIDE_INT);
 	}
 
       value = wide_int_to_tree (type,

gcc/rtlanal.c

@@ -5805,9 +5805,9 @@ split_double (rtx value, rtx *first, rtx *second)
       if (BITS_PER_WORD < HOST_BITS_PER_LONG && BITS_PER_WORD == 32)
 	{
 	  if (l[0] & ((long) 1 << 31))
-	    l[0] |= ((long) (-1) << 32);
+	    l[0] |= ((unsigned long) (-1) << 32);
 	  if (l[1] & ((long) 1 << 31))
-	    l[1] |= ((long) (-1) << 32);
+	    l[1] |= ((unsigned long) (-1) << 32);
 	}
 #endif
 

gcc/sched-int.h

@@ -240,7 +240,7 @@ struct _dep
   int cost:20;
 };
 
-#define UNKNOWN_DEP_COST (-1<<19)
+#define UNKNOWN_DEP_COST ((int) ((unsigned int) -1 << 19))
 
 typedef struct _dep dep_def;
 typedef dep_def *dep_t;