gimplefe: Round trip of rotates [PR119432]

gimplefe: Round trip of rotates [PR119432]

This adds support for rotate left/right to the GIMPLE front-end
via __ROTATE_LEFT/__ROTATE_RIGHT oeprators.

	PR c/119432
gcc/c/ChangeLog:

	* gimple-parser.cc (gimple_binary_identifier_code): Add
	__ROTATE_LEFT and __ROTATE_RIGHT.

gcc/ChangeLog:

	* tree-pretty-print.cc (op_symbol_code): For LROTATE_EXPR,
	output __ROTATE_LEFT for gimple.
	For RROTATE_EXPR output __ROTATE_RIGHT for gimple.

gcc/testsuite/ChangeLog:

	* gcc.dg/gimplefe-57.c: New test.

Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>