re PR target/82748 (ICE with __builtin_fabsq and __float128 in copy_to_mode_reg,...

re PR target/82748 (ICE with __builtin_fabsq and __float128 in copy_to_mode_reg, at explow.c:612)

[gcc]
2017-11-06  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/82748
	* config/rs6000/rs6000-builtin.def (BU_FLOAT128_1): Delete
	float128 helper macros, which are no longer used after deleting
	the old 'q' built-in functions, and moving the round to odd
	built-in functions to being special built-in functions.
	(BU_FLOAT128_2): Likewise.
	(BU_FLOAT128_1_HW): Likewise.
	(BU_FLOAT128_2_HW): Likewise.
	(BU_FLOAT128_3_HW): Likewise.
	(FABSQ): Delete old 'q' built-in functions.
	(COPYSIGNQ): Likewise.
	(SQRTF128_ODD): Move round to odd built-in functions to be
	special built-in functions, so that we can handle
	-mabi=ieeelongdouble.
	(TRUNCF128_ODD): Likewise.
	(ADDF128_ODD): Likewise.
	(SUBF128_ODD): Likewise.
	(MULF128_ODD): Likewise.
	(DIVF128_ODD): Likewise.
	(FMAF128_ODD): Likewise.
	* config/rs6000/rs6000-c.c (rs6000_cpu_cpp_builtins): Map old 'q'
	built-in names to 'f128'.
	* config/rs6000/rs6000.c (rs6000_fold_builtin): Remove folding the
	old 'q' built-in functions, as the machine independent code for
	'f128' built-in functions handles this.
	(rs6000_expand_builtin): Add expansion for float128 round to odd
	functions, keying off on -mabi=ieeelongdouble of whether to use
	the KFmode or TFmode variant.
	(rs6000_init_builtins): Initialize the _Float128 round to odd
	built-in functions.
	* doc/extend.texi (PowerPC Built-in Functions): Document the old
	_Float128 'q' built-in functions are now mapped into the new
	'f128' built-in functions.

[gcc/testsuite]
2017-11-06  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/82748
	* gcc.target/powerpc/pr82748-1.c: New test.
	* gcc.target/powerpc/pr82748-2.c: Likewise.

From-SVN: r254462