From 716aefcd910ae849ffb42d4149ac6aecc818c515 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Thu, 23 Mar 2006 21:28:44 +0000 Subject: [PATCH] add a note git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27000 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/PowerPC/README.txt | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt index c9fba7fed47..5bdefaa23ce 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. + -- 2.34.1