1 files changed, 36 insertions, 0 deletions
diff --git a/test/Analysis/CFLAliasAnalysis/Steensgaard/interproc-store-arg.ll b/test/Analysis/CFLAliasAnalysis/Steensgaard/interproc-store-arg.ll
new file mode 100644
index 000000000000..e520de4d0b1c
--- /dev/null
+++ b/test/Analysis/CFLAliasAnalysis/Steensgaard/interproc-store-arg.ll
@@ -0,0 +1,36 @@
+; This testcase ensures that CFL AA answers queries soundly when callee tries 
+; to mutate the memory pointed to by its parameters
+
+; RUN: opt < %s -disable-basicaa -cfl-steens-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
+; RUN: opt < %s -aa-pipeline=cfl-steens-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
+
+define void @store_arg_callee(i32** %arg1, i32* %arg2) {
+	store i32* %arg2, i32** %arg1
+	ret void
+}
+; CHECK-LABEL: Function: test_store_arg
+; CHECK: NoAlias: i32* %a, i32** %p
+; CHECK: NoAlias: i32* %b, i32** %p
+; CHECK: MayAlias: i32* %a, i32* %lp
+; CHECK: MayAlias: i32* %b, i32* %lp
+; CHECK: MayAlias: i32* %b, i32* %lq
+; CHECK: MayAlias: i32* %lp, i32* %lq
+
+; We could've proven the following facts if the analysis were inclusion-based:
+; NoAlias: i32* %a, i32* %b
+; NoAlias: i32* %a, i32* %lq
+define void @test_store_arg() {
+  %a = alloca i32, align 4
+  %b = alloca i32, align 4
+  %p = alloca i32*, align 8
+  %q = alloca i32*, align 8
+
+  store i32* %a, i32** %p
+  store i32* %b, i32** %q
+  call void @store_arg_callee(i32** %p, i32* %b)
+
+  %lp = load i32*, i32** %p
+  %lq = load i32*, i32** %q
+
+  ret void
+}
+\ No newline at end of file