re PR target/84914 (PowerPC complex multiply/divide calls the wrong function when -mabi=ieeelongdouble)

[gcc]
2018-03-27  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/84914
	* config/rs6000/rs6000.c (create_complex_muldiv): New helper
	function to create the function decl for complex long double
	multiply and divide for -mabi=ieeelongdouble.
	(init_float128_ieee): Call it.

[gcc/testsuite]
2018-03-27  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/84914
	* gcc.target/powerpc/mulkc-2.c: New tests to make sure complex
	long double multiply/divide uses the correct function.
	* gcc.target/powerpc/mulkc-3.c: Likewise.
	* gcc.target/powerpc/divkc-2.c: Likewise.
	* gcc.target/powerpc/divkc-3.c: Likewise.

From-SVN: r258908