gcc/

	PR tree-optimization/56064
	* fixed-value.c (fixed_from_double_int): New function.
	* fixed-value.h (fixed_from_double_int): New prototype.
	(const_fixed_from_double_int): New static inline function.
	* fold-const.c (native_interpret_fixed): New static function.
	(native_interpret_expr) <FIXED_POINT_TYPE>: Use it.
	(can_native_interpret_type_p) <FIXED_POINT_TYPE>: Return true.
	(native_encode_fixed): New static function.
	(native_encode_expr) <FIXED_CST>: Use it.
	(native_interpret_int): Move double_int worker code to...
	* double-int.c (double_int::from_buffer): ...this new static method.
	* double-int.h (double_int::from_buffer): Prototype it.

gcc/testsuite/
	PR tree-optimization/56064
	* gcc.dg/fixed-point/view-convert.c: New test.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@195574 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 18 insertions, 0 deletions

diff --git a/gcc/fixed-value.c b/gcc/fixed-value.c
index f917775ce88..2e97a492619 100644
--- a/gcc/fixed-value.c
+++ b/gcc/fixed-value.c
@@ -81,6 +81,24 @@ check_real_for_fixed_mode (REAL_VALUE_TYPE *real_value, enum machine_mode mode)
   return FIXED_OK;
 }
 
+
+/* Construct a CONST_FIXED from a bit payload and machine mode MODE.
+   The bits in PAYLOAD are used verbatim.  */
+
+FIXED_VALUE_TYPE
+fixed_from_double_int (double_int payload, enum machine_mode mode)
+{
+  FIXED_VALUE_TYPE value;
+
+  gcc_assert (GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_DOUBLE_INT);
+
+  value.data = payload;
+  value.mode = mode;
+
+  return value;
+}
+
+
 /* Initialize from a decimal or hexadecimal string.  */
 
 void