From 9958b8273368e3cab28dd79d6faec0c5478f2ec3 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 5 May 2007 22:44:08 +0000
Subject: [PATCH] add a note

llvm-svn: 36811
---
 llvm/lib/Target/README.txt | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/llvm/lib/Target/README.txt b/llvm/lib/Target/README.txt
index 20f4898b2a43..37b671f34b76 100644
--- a/llvm/lib/Target/README.txt
+++ b/llvm/lib/Target/README.txt
@@ -424,3 +424,28 @@ return:
                             [ %tmp.9, %then.1 ]
         ret int %result.0
 }
+
+//===---------------------------------------------------------------------===//
+
+Argument promotion should promote arguments for recursive functions, like 
+this:
+
+; RUN: llvm-upgrade < %s | llvm-as | opt -argpromotion | llvm-dis | grep x.val
+
+implementation   ; Functions:
+
+internal int %foo(int* %x) {
+entry:
+        %tmp = load int* %x
+        %tmp.foo = call int %foo(int *%x)
+        ret int %tmp.foo
+}
+
+int %bar(int* %x) {
+entry:
+        %tmp3 = call int %foo( int* %x)                ; <int>[#uses=1]
+        ret int %tmp3
+}
+
+
+