new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15259 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 15 insertions, 0 deletions

diff --git a/test/Analysis/GlobalsModRef/purecse.ll b/test/Analysis/GlobalsModRef/purecse.ll
new file mode 100644
index 0000000000..17e6a0a521
--- /dev/null
+++ b/test/Analysis/GlobalsModRef/purecse.ll
@@ -0,0 +1,15 @@
+; Test that pure functions are cse'd away
+
+; RUN: llvm-as < %s | opt -globalsmodref-aa -load-vn -gcse -instcombine -adce| llvm-dis | not grep call
+
+int %pure(int %X) {
+	%Y = add int %X, 1
+	ret int %Y
+}
+
+int %test(int %X) {
+	%A = call int %pure(int %X)
+	%B = call int %pure(int %X)
+	%C = sub int %A, %B
+	ret int %C
+}