From: Chris Lattner <sabre@nondot.org>
Date: Sun, 7 Dec 2008 00:15:10 +0000 (+0000)
Subject: improve a note.
X-Git-Tag: android-x86-6.0-r1~1003^2~24022
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=630c99fd21cb27d955b43db250de36393e514ba4;p=android-x86%2Fexternal-llvm.git

improve a note.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60636 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/README.txt b/lib/Target/README.txt
index ba0b4433235..646961efe18 100644
--- a/lib/Target/README.txt
+++ b/lib/Target/README.txt
@@ -1388,7 +1388,18 @@ http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14705
 
 When GVN/PRE finds a store of float* to a must aliases pointer when expecting
 an int*, it should turn it into a bitcast.  This is a nice generalization of
-the SROA hack that would apply to other cases.
+the SROA hack that would apply to other cases, e.g.:
+
+int foo(int C, int *P, float X) {
+  if (C) {
+    bar();
+    *P = 42;
+  } else
+    *(float*)P = X;
+
+   return *P;
+}
+
 
 One example (that requires crazy phi translation) is:
 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16799