New testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8391 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Analysis/LoadVN/RLE-Preserve-Volatile.ll b/test/Analysis/LoadVN/RLE-Preserve-Volatile.ll
new file mode 100644 (file)
index 0000000..6831ef0
--- /dev/null
+++ b/test/Analysis/LoadVN/RLE-Preserve-Volatile.ll
@@ -0,0 +1,9 @@
+
+; RUN: llvm-as < %s | opt -load-vn -gcse -instcombine | dis | grep sub
+
+int %test(int* %P) {
+       %X = load volatile int* %P
+       %Y = load volatile int* %P
+       %Z = sub int %X, %Y
+       ret int %Z
+}