re PR target/24036 ([e500] ICE in subreg_offset_representable_p, at rtlanal.c:3143)

re PR target/24036 ([e500] ICE in subreg_offset_representable_p, at rtlanal.c:3143)

2006-12-01  Joseph Myers  <joseph@codesourcery.com>
            David Edelsohn  <edelsohn@gnu.org>

	PR target/24036
	* doc/tm.texi (HARD_REGNO_NREGS_HAS_PADDING,
	HARD_REGNO_NREGS_WITH_PADDING): Document new target macros.
	* defaults.h (HARD_REGNO_NREGS_HAS_PADDING,
	HARD_REGNO_NREGS_WITH_PADDING): Define.
	* config/i386/i386.h (HARD_REGNO_NREGS_HAS_PADDING,
	HARD_REGNO_NREGS_WITH_PADDING): Define.
	* rtlanal.c (subreg_regno_offset, subreg_offset_representable_p):
	Use new macros to detect modes with holes; do not look at integer
	units.
	(subreg_offset_representable_p): Check for and disallow cases
	where the modes use different numbers of bits from registers.
	* config/rs6000/rs6000.c (rs6000_emit_move): Handle TFmode
	constant for soft-float.
	(rs6000_hard_regno_nregs): Use UNITS_PER_FP_WORD for e500 GPRs
	containing doubles.
	(rs6000_split_multireg_move): Use DFmode reg_mode for TFmode moves
	in E500 double case.
	* config/rs6000/rs6000.md (movtf): Allow soft-float.
	(movtf_softfloat): New.

Co-Authored-By: David Edelsohn <edelsohn@gnu.org>
From-SVN: r119395