re PR target/71493 (accidental ABI change for structure return on PowerPC)

re PR target/71493 (accidental ABI change for structure return on PowerPC)

[gcc]
2016-07-18  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/71493
	* config/rs6000/rs6000.c (rs6000_function_value): Fix
	unintentional System V.4 structure return breakage for structures
	with a single floating point element.

[gcc/testsuite]
2016-07-18  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/71493
	* gcc.target/powerpc/pr71493-1.c: New test.
	* gcc.target/powerpc/pr71493-2.c: Likewise.

From-SVN: r238454