+Wed May 26 09:53:05 1999 Mark Mitchell <mark@codesourcery.com>
+
+ * fold-const.c (fold): STRIP_NOPS when deciding whether or not
+ something is a candidate for optimize_bit_field_compare.
+
Wed May 26 09:40:02 1999 Mark Mitchell <mark@codesourcery.com>
* gcc.texi (Passes): Document branch-shortening.
}
/* If this is a comparison of a field, we may be able to simplify it. */
- if ((TREE_CODE (arg0) == COMPONENT_REF
- || TREE_CODE (arg0) == BIT_FIELD_REF)
- && (code == EQ_EXPR || code == NE_EXPR)
- /* Handle the constant case even without -O
- to make sure the warnings are given. */
- && (optimize || TREE_CODE (arg1) == INTEGER_CST))
- {
- t1 = optimize_bit_field_compare (code, type, arg0, arg1);
- return t1 ? t1 : t;
- }
+ {
+ tree xarg0 = arg0;
+ STRIP_NOPS (xarg0);
+ if ((TREE_CODE (xarg0) == COMPONENT_REF
+ || TREE_CODE (xarg0) == BIT_FIELD_REF)
+ && (code == EQ_EXPR || code == NE_EXPR)
+ /* Handle the constant case even without -O
+ to make sure the warnings are given. */
+ && (optimize || TREE_CODE (arg1) == INTEGER_CST))
+ {
+ t1 = optimize_bit_field_compare (code, type, xarg0, arg1);
+ return t1 ? t1 : t;
+ }
+ }
/* If this is a comparison of complex values and either or both sides
are a COMPLEX_EXPR or COMPLEX_CST, it is best to split up the