1 files changed, 38 insertions, 0 deletions
diff --git a/llvm/test/Analysis/CFLAliasAnalysis/Andersen/interproc-ret-unknown.ll b/llvm/test/Analysis/CFLAliasAnalysis/Andersen/interproc-ret-unknown.ll
new file mode 100644
index 00000000000..4c20269896a
--- /dev/null
+++ b/llvm/test/Analysis/CFLAliasAnalysis/Andersen/interproc-ret-unknown.ll
@@ -0,0 +1,38 @@
+; This testcase ensures that CFL AA answers queries soundly when callee tries 
+; to return an unknown pointer
+
+; RUN: opt < %s -disable-basicaa -cfl-anders-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
+; RUN: opt < %s -aa-pipeline=cfl-anders-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
+
+@g = external global i32
+define i32* @return_unknown_callee(i32* %arg1, i32* %arg2) {
+	ret i32* @g
+}
+; CHECK-LABEL: Function: test_return_unknown
+; CHECK: NoAlias: i32* %a, i32* %b
+; CHECK: MayAlias: i32* %c, i32* %x
+; CHECK: NoAlias: i32* %a, i32* %c
+; CHECK: NoAlias: i32* %b, i32* %c
+define void @test_return_unknown(i32* %x) {
+  %a = alloca i32, align 4
+  %b = alloca i32, align 4
+
+  %c = call i32* @return_unknown_callee(i32* %a, i32* %b)
+
+  ret void
+}
+
+@g2 = external global i32*
+define i32** @return_unknown_callee2() {
+	ret i32** @g2
+}
+; CHECK-LABEL: Function: test_return_unknown2
+; CHECK: MayAlias: i32* %x, i32** %a
+; CHECK: MayAlias: i32* %b, i32* %x
+; CHECK: MayAlias: i32* %b, i32** %a
+define void @test_return_unknown2(i32* %x) {
+  %a = call i32** @return_unknown_callee2()
+  %b = load i32*, i32** %a
+
+  ret void
+}
+\ No newline at end of file