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Commit b7f2c1fc by Mark Mitchell Committed by Mark Mitchell
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fold-const.c (fold): STRIP_NOPS when deciding whether or not something is a candidate for... 

        * fold-const.c (fold): STRIP_NOPS when deciding whether or not
	something is a candidate for optimize_bit_field_compare.

From-SVN: r27169
parent f20b5577
Showing with 19 additions and 10 deletions
gcc/ChangeLog
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.
......
gcc/fold-const.c
......@@ -6036,16 +6036,20 @@ fold (expr)
}
/* 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
......
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