diff --git a/llvm/lib/Target/PowerPC/README.txt b/llvm/lib/Target/PowerPC/README.txt
index abd91575e9e0..972e5bbd6e17 100644
--- a/llvm/lib/Target/PowerPC/README.txt
+++ b/llvm/lib/Target/PowerPC/README.txt
@@ -217,5 +217,22 @@ _test:
         stw r2, 0(r3)
         blr
 
+===-------------------------------------------------------------------------===
 
+Compile
+int foo(int a) { return a * -2 + 63; }
+
+to
+
+_foo:
+        slwi r0,r3,1
+        subfic r3,r0,63
+        blr
+
+instead of:
+
+_foo:
+        mulli r2,r3,-2
+        addi r3,r2,63
+        blr