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rs6000.c (rs6000_preferred_reload_class): Disallow reload of PLUS rtx's outside of GENERAL_REGS or BASE_REGS...

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2014-03-03  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* config/rs6000/rs6000.c (rs6000_preferred_reload_class): Disallow
	reload of PLUS rtx's outside of GENERAL_REGS or BASE_REGS; relax
	constraint on constants to permit them being loaded into
	GENERAL_REGS or BASE_REGS.

From-SVN: r208287
This commit is contained in:
Bill Schmidt 2014-03-03 20:16:52 +00:00 committed by William Schmidt
parent a10d35a8ba
commit b46ed885d9
2 changed files with 15 additions and 2 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2014-03-03 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
* config/rs6000/rs6000.c (rs6000_preferred_reload_class): Disallow
reload of PLUS rtx's outside of GENERAL_REGS or BASE_REGS; relax
constraint on constants to permit them being loaded into
GENERAL_REGS or BASE_REGS.
2014-03-03 Nick Clifton <nickc@redhat.com>
* config/rl78/rl78-real.md (cbranchsi4_real_signed): Add

10
gcc/config/rs6000/rs6000.c
View File

@ -16751,8 +16751,14 @@ rs6000_preferred_reload_class (rtx x, enum reg_class rclass)
&& easy_vector_constant (x, mode))
return ALTIVEC_REGS;
if (CONSTANT_P (x) && reg_classes_intersect_p (rclass, FLOAT_REGS))
return NO_REGS;
if ((CONSTANT_P (x) || GET_CODE (x) == PLUS))
{
if (reg_class_subset_p (GENERAL_REGS, rclass))
return GENERAL_REGS;
if (reg_class_subset_p (BASE_REGS, rclass))
return BASE_REGS;
return NO_REGS;
}
if (GET_MODE_CLASS (mode) == MODE_INT && rclass == NON_SPECIAL_REGS)
return GENERAL_REGS;