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gcc.ld_unaligned-460
Optimization:
Allows a "ld" of an address that is world aligned. There is a penalty
performance, but it still beats a pair of "lwz".
Index: gcc-4.4-e500mc64-20090322/gcc/config/rs6000/rs6000.c
===================================================================
--- gcc-4.4-e500mc64-20090322/gcc/config/rs6000/rs6000.c (revision 137727)
+++ gcc-4.4-e500mc64-20090322/gcc/config/rs6000/rs6000.c (working copy)
@@ -10640,7 +10667,9 @@
else if (bytes >= 8 && TARGET_POWERPC64
/* 64-bit loads and stores require word-aligned
displacements. */
- && (align >= 64 || (!STRICT_ALIGNMENT && align >= 32)))
+ && (align >= 64 || (!STRICT_ALIGNMENT && align >= 32)
+ || rs6000_cpu == PROCESSOR_PPCE5500
+ || rs6000_cpu == PROCESSOR_PPCE6500))
{
clear_bytes = 8;
mode = DImode;
@@ -10775,7 +10808,9 @@
else if (bytes >= 8 && TARGET_POWERPC64
/* 64-bit loads and stores require word-aligned
displacements. */
- && (align >= 64 || (!STRICT_ALIGNMENT && align >= 32)))
+ && (align >= 64 || (!STRICT_ALIGNMENT && align >= 32)
+ || rs6000_cpu == PROCESSOR_PPCE5500
+ || rs6000_cpu == PROCESSOR_PPCE6500))
{
move_bytes = 8;
mode = DImode;
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