}
}
+/* Return true if EXPR is an initializer expression in which every element
+ is a constant that is numerically equal to 0 or 1. The elements do not
+ need to be equal to each other. */
+
+bool
+initializer_each_zero_or_onep (const_tree expr)
+{
+ STRIP_ANY_LOCATION_WRAPPER (expr);
+
+ switch (TREE_CODE (expr))
+ {
+ case INTEGER_CST:
+ return integer_zerop (expr) || integer_onep (expr);
+
+ case REAL_CST:
+ return real_zerop (expr) || real_onep (expr);
+
+ case VECTOR_CST:
+ {
+ unsigned HOST_WIDE_INT nelts = vector_cst_encoded_nelts (expr);
+ if (VECTOR_CST_STEPPED_P (expr)
+ && !TYPE_VECTOR_SUBPARTS (TREE_TYPE (expr)).is_constant (&nelts))
+ return false;
+
+ for (unsigned int i = 0; i < nelts; ++i)
+ {
+ tree elt = VECTOR_CST_ENCODED_ELT (expr, i);
+ if (!initializer_each_zero_or_onep (elt))
+ return false;
+ }
+
+ return true;
+ }
+
+ default:
+ return false;
+ }
+}
+
/* Check if vector VEC consists of all the equal elements and
that the number of elements corresponds to the type of VEC.
The function returns first element of the vector
/* If TYPE is an integral or pointer type, return an integer type with
the same precision which is unsigned iff UNSIGNEDP is true, or itself
- if TYPE is already an integer type of signedness UNSIGNEDP. */
+ if TYPE is already an integer type of signedness UNSIGNEDP.
+ If TYPE is a floating-point type, return an integer type with the same
+ bitsize and with the signedness given by UNSIGNEDP; this is useful
+ when doing bit-level operations on a floating-point value. */
tree
signed_or_unsigned_type_for (int unsignedp, tree type)
return build_complex_type (inner2);
}
- if (!INTEGRAL_TYPE_P (type)
- && !POINTER_TYPE_P (type)
- && TREE_CODE (type) != OFFSET_TYPE)
+ unsigned int bits;
+ if (INTEGRAL_TYPE_P (type)
+ || POINTER_TYPE_P (type)
+ || TREE_CODE (type) == OFFSET_TYPE)
+ bits = TYPE_PRECISION (type);
+ else if (TREE_CODE (type) == REAL_TYPE)
+ bits = GET_MODE_BITSIZE (SCALAR_TYPE_MODE (type));
+ else
return NULL_TREE;
- return build_nonstandard_integer_type (TYPE_PRECISION (type), unsignedp);
+ return build_nonstandard_integer_type (bits, unsignedp);
}
/* If TYPE is an integral or pointer type, return an integer type with
the same precision which is unsigned, or itself if TYPE is already an
- unsigned integer type. */
+ unsigned integer type. If TYPE is a floating-point type, return an
+ unsigned integer type with the same bitsize as TYPE. */
tree
unsigned_type_for (tree type)
/* If TYPE is an integral or pointer type, return an integer type with
the same precision which is signed, or itself if TYPE is already a
- signed integer type. */
+ signed integer type. If TYPE is a floating-point type, return a
+ signed integer type with the same bitsize as TYPE. */
tree
signed_type_for (tree type)