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fold-const.c (operand_equal_p): Update comment.

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2004-06-15  Paolo Bonzini  <bonzini@gnu.org>

	* fold-const.c (operand_equal_p): Update comment.

From-SVN: r83173
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Paolo Bonzini 2004-06-15 10:27:30 +00:00 committed by Paolo Bonzini
parent 7b14411a87
commit 3dd8069d49
2 changed files with 8 additions and 4 deletions
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gcc/ChangeLog
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@ -1,3 +1,7 @@
2004-06-15 Paolo Bonzini <bonzini@gnu.org>
* fold-const.c (operand_equal_p): Update comment.
2004-06-15 Kazuhiro Inaoka <inaoka.kazuhiro@renesas.com>
* config/m32r/m32r.h (RETURN_ADDR_RTX): Define.

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gcc/fold-const.c
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@ -2337,10 +2337,10 @@ truth_value_p (enum tree_code code)
executed between the evaluation of its "operands" (which may often
be evaluated in arbitrary order). Hence if the operands themselves
don't side-effect, the VAR_DECLs, PARM_DECLs etc... must hold the
same value in each operand/subexpression. Hence a zero value for
ONLY_CONST assumes isochronic (or instantaneous) tree equivalence.
If comparing arbitrary expression trees, such as from different
statements, ONLY_CONST must usually be nonzero.
same value in each operand/subexpression. Hence leaving OEP_ONLY_CONST
unset means assuming isochronic (or instantaneous) tree equivalence.
Unless comparing arbitrary expression trees, such as from different
statements, this flag can usually be left unset.
If OEP_PURE_SAME is set, then pure functions with identical arguments
are considered the same. It is used when the caller has other ways