DImode references do not suffer a major performance hit for < 4-byte aligned
access like the float types.
Bootstrap/regtest on powerpc64-linux with no new regressions. Ok for trunk?
-Pat
2012-04-17 Pat Haugen <pthau...@us.ibm.com>
* config/rs6000/rs6000.h (SLOW_UNALIGNED_ACCESS): Remove DImode.
Index: gcc/config/rs6000/rs6000.h
===================================================================
--- gcc/config/rs6000/rs6000.h (revision 186389)
+++ gcc/config/rs6000/rs6000.h (working copy)
@@ -771,8 +771,7 @@ extern unsigned rs6000_pointer_size;
#define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) \
(STRICT_ALIGNMENT \
|| (((MODE) == SFmode || (MODE) == DFmode || (MODE) == TFmode \
- || (MODE) == SDmode || (MODE) == DDmode || (MODE) == TDmode \
- || (MODE) == DImode) \
+ || (MODE) == SDmode || (MODE) == DDmode || (MODE) == TDmode) \
&& (ALIGN) < 32) \
|| (VECTOR_MODE_P ((MODE)) && (((int)(ALIGN)) < VECTOR_ALIGN (MODE))))
