diff options
| -rw-r--r-- | lib/Target/PowerPC/README.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt index c9fba7fed4..5bdefaa23c 100644 --- a/lib/Target/PowerPC/README.txt +++ b/lib/Target/PowerPC/README.txt @@ -569,3 +569,13 @@ We could use a target dag combine to turn the lwz/extsw into an lwa when the lwz has a single use. Since LWA is cracked anyway, this would be a codesize win only. +===-------------------------------------------------------------------------=== + + Consider this: + v4f32 Vector; + v4f32 Vector2 = { Vector.X, Vector.X, Vector.X, Vector.X }; + +Since we know that "Vector" is 16-byte aligned and we know the element offset +of ".X", we should change the load into a lve*x instruction, instead of doing +a load/store/lve*x sequence. + |