New testcase for CSE of call instructions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12418 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Analysis/LoadVN/call_cse.ll b/test/Analysis/LoadVN/call_cse.ll
new file mode 100644 (file)
index 0000000..311f38a
--- /dev/null
+++ b/test/Analysis/LoadVN/call_cse.ll
@@ -0,0 +1,11 @@
+; RUN: llvm-as < %s | opt -basicaa -load-vn -gcse -instcombine | llvm-dis | not grep sub
+declare int %strlen(sbyte*)
+
+int %test(sbyte* %P) {
+       %X = call int %strlen(sbyte* %P)
+       %A = add int %X, 14
+       %Y = call int %strlen(sbyte* %P)
+       %Z = sub int %X, %Y
+       %B = add int %A, %Z
+       ret int %B
+}