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r120333 - in /trunk/gcc: ChangeLog fold-const.c...


Author: sayle
Date: Tue Jan  2 04:32:07 2007
New Revision: 120333

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=120333
Log:

	* fold-const.c (fold_binary) <EQ_EXPR>: Fold "(X^C1) eq/ne C2" into
	"X eq/ne (C1^C2)".  Fold "(X^Z) eq/ne (Y^Z)" as "X eq/ne Y" when Z
	has no side-effects.  Fold "(X^C1) eq/ne (Y^C2)" as "(X^(C1^C2))
	eq/ne Y".

	* gcc.dg/fold-eqxor-4.c: New test case.


Added:
    trunk/gcc/testsuite/gcc.dg/fold-eqxor-4.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog


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