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[committed] Fix comment to operand_equal_p


This patch updates a comment to operand_equal_p.

Commited as obvious.

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

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

*** gcc-save/gcc/fold-const.c	2004-05-28 20:30:47.000000000 +0200
--- gcc/gcc/fold-const.c	2004-06-06 13:40:59.000000000 +0200
***************
*** 2334,2343 ****
     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.
  
     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
--- 2334,2343 ----
     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 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

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