https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93080
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-12-27
Target Milestone|--- |11.0
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Mine for GCC 11.
Patch:
diff --git a/gcc/match.pd b/gcc/match.pd
index 84a62ef..c81c5ea 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -5682,6 +5682,11 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
&& TYPE_PRECISION (type) == TYPE_PRECISION (TREE_TYPE (@1)))
(convert @1)))
+/* Inserting in the same value as extracted is just the original value. */
+(simplify
+ (bit_insert @0 (BIT_FIELD_REF @0 @1 @2) @2)
+ @0)
+
/* bit_insert<@0 convert:@1<@2> @3> -> bit_insert<@0 @2 @3> iff @1 was in
the correct precision already and is an insert for integral type. */
(simplify
