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

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

From-SVN: r27169
This commit is contained in:
Mark Mitchell 1999-05-26 09:50:08 +00:00 committed by Mark Mitchell
parent f20b5577f8
commit b7f2c1fc1b
2 changed files with 19 additions and 10 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
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> Wed May 26 09:40:02 1999 Mark Mitchell <mark@codesourcery.com>
* gcc.texi (Passes): Document branch-shortening. * gcc.texi (Passes): Document branch-shortening.

24
gcc/fold-const.c
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@ -6036,16 +6036,20 @@ fold (expr)
} }
/* If this is a comparison of a field, we may be able to simplify it. */ /* 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) tree xarg0 = arg0;
&& (code == EQ_EXPR || code == NE_EXPR) STRIP_NOPS (xarg0);
/* Handle the constant case even without -O if ((TREE_CODE (xarg0) == COMPONENT_REF
to make sure the warnings are given. */ || TREE_CODE (xarg0) == BIT_FIELD_REF)
&& (optimize || TREE_CODE (arg1) == INTEGER_CST)) && (code == EQ_EXPR || code == NE_EXPR)
{ /* Handle the constant case even without -O
t1 = optimize_bit_field_compare (code, type, arg0, arg1); to make sure the warnings are given. */
return t1 ? t1 : t; && (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 /* 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 are a COMPLEX_EXPR or COMPLEX_CST, it is best to split up the