1 files changed, 31 insertions, 0 deletions
diff --git a/test/Analysis/CFLAliasAnalysis/multilevel-combine.ll b/test/Analysis/CFLAliasAnalysis/multilevel-combine.ll
new file mode 100644
index 0000000..9bbc721
--- /dev/null
+++ b/test/Analysis/CFLAliasAnalysis/multilevel-combine.ll
@@ -0,0 +1,31 @@
+; This testcase ensures that CFL AA responds conservatively when we union 
+; groups of pointers together through ternary/conditional operations
+; Derived from:
+; void foo(bool c) {
+;   char a, b;
+;   char *m = c ? &a : &b;
+;   *m;
+; }
+;
+
+; RUN: opt < %s -cfl-aa -aa-eval -print-may-aliases -disable-output 2>&1 | FileCheck %s
+
+%T = type { i32, [10 x i8] }
+
+; CHECK:     Function: test
+
+define void @test(i1 %C) {
+; CHECK: 10 Total Alias Queries Performed
+; CHECK: 4 no alias responses
+  %M = alloca %T*, align 8 ; NoAlias with %A, %B, %MS, %AP
+  %A = alloca %T, align 8
+  %B = alloca %T, align 8
+
+  %MS = select i1 %C, %T* %B, %T* %A
+
+  store %T* %MS, %T** %M
+
+  %AP = load %T** %M ; PartialAlias with %A, %B
+
+  ret void
+}