From c9a318d8fa9b0e155b1ea13cf48148600d4cb42a Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 4 Mar 2006 08:44:51 +0000
Subject: [PATCH] Add a note

llvm-svn: 26523
---
 llvm/lib/Target/README.txt | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/llvm/lib/Target/README.txt b/llvm/lib/Target/README.txt
index 2ce2575d1ca2..cdadb26806c0 100644
--- a/llvm/lib/Target/README.txt
+++ b/llvm/lib/Target/README.txt
@@ -101,3 +101,20 @@ into:
 
 This would be a win on ppc32, but not x86 or ppc64.
 
+//===---------------------------------------------------------------------===//
+
+Pull add through mul/shift to handle this:
+
+int foo(int P[4][4], int i) {
+  return P[i+2][1];
+}
+
+better than this (no addi needed):
+
+_foo:
+        addi r2, r4, 2
+        slwi r2, r2, 4
+        add r2, r3, r2
+        lwz r3, 4(r2)
+        blr
+