From 29b6cb40c1329c807ef3007bd5c5901ab42e525a Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Tue, 30 Nov 2010 04:13:41 +0000
Subject: [PATCH] Make @llvm.invariant.start not be readonly, so that it has
 side-effects. This unbreaks test/Transforms/InstCombine/invariant.ll which
 was broken by r120382. This is a fix-forward to do what I think Chris
 intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120388 91177308-0d34-0410-b5e6-96231b3b80d8
---
 docs/LangRef.html          | 2 +-
 include/llvm/Intrinsics.td | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/LangRef.html b/docs/LangRef.html
index 1786e657cb7..68d65f1a972 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -7506,7 +7506,7 @@ LLVM</a>.</p>
 
 <h5>Syntax:</h5>
 <pre>
-  declare {}* @llvm.invariant.start(i64 &lt;size&gt;, i8* nocapture &lt;ptr&gt;) readonly
+  declare {}* @llvm.invariant.start(i64 &lt;size&gt;, i8* nocapture &lt;ptr&gt;)
 </pre>
 
 <h5>Overview:</h5>
diff --git a/include/llvm/Intrinsics.td b/include/llvm/Intrinsics.td
index 347541f71f1..addb6df7d49 100644
--- a/include/llvm/Intrinsics.td
+++ b/include/llvm/Intrinsics.td
@@ -436,7 +436,7 @@ def int_lifetime_end    : Intrinsic<[],
                                     [IntrReadWriteArgMem, NoCapture<1>]>;
 def int_invariant_start : Intrinsic<[llvm_descriptor_ty],
                                     [llvm_i64_ty, llvm_ptr_ty],
-                                    [IntrReadArgMem, NoCapture<1>]>;
+                                    [IntrReadWriteArgMem, NoCapture<1>]>;
 def int_invariant_end   : Intrinsic<[],
                                     [llvm_descriptor_ty, llvm_i64_ty,
                                      llvm_ptr_ty],