From 24905f7cfbf50deaa9dd7c94c5e02789b8afeaef Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Fri, 7 Sep 2007 05:33:03 +0000
Subject: Don't zap back to back volatile load/stores

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41759 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Transforms/InstCombine/volatile_store.ll | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 test/Transforms/InstCombine/volatile_store.ll

(limited to 'test/Transforms/InstCombine')

diff --git a/test/Transforms/InstCombine/volatile_store.ll b/test/Transforms/InstCombine/volatile_store.ll
new file mode 100644
index 0000000..09651ba
--- /dev/null
+++ b/test/Transforms/InstCombine/volatile_store.ll
@@ -0,0 +1,14 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {volatile store}
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {volatile load}
+
+@x = weak global i32 0		; <i32*> [#uses=2]
+
+define void @self_assign_1() {
+entry:
+	%tmp = volatile load i32* @x		; <i32> [#uses=1]
+	volatile store i32 %tmp, i32* @x
+	br label %return
+
+return:		; preds = %entry
+	ret void
+}
-- 
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