gcc/testsuite/ChangeLog:

2018-10-28  Kugan Vivekanandarajah  <kuganv@linaro.org>

	* gcc.dg/gimplefe-30.c: New test.
	* gcc.dg/gimplefe-31.c: New test.
	* gcc.dg/gimplefe-32.c: New test.
	* gcc.dg/gimplefe-33.c: New test.


gcc/ChangeLog:

2018-10-28  Kugan Vivekanandarajah  <kuganv@linaro.org>

	* doc/generic.texi (ABSU_EXPR): Document.
        * match.pd (absu(x)*absu(x) -> x*x): Handle.
        (absu(absu(X)) -> absu(X)): Likewise.
        (absu(-X) -> absu(X)): Likewise.
        (absu(X)  where X is nonnegative -> X): Likewise.

From-SVN: r265578