[CFL-AA] Update for handling of globals and more tests

[oota-llvm.git] / test / Analysis / CFLAliasAnalysis / multilevel.ll

diff --git a/test/Analysis/CFLAliasAnalysis/multilevel.ll b/test/Analysis/CFLAliasAnalysis/multilevel.ll
new file mode 100644 (file)
index 0000000..9c9eb9a
--- /dev/null
+++ b/test/Analysis/CFLAliasAnalysis/multilevel.ll
@@ -0,0 +1,30 @@
+; This testcase ensures that CFL AA handles trivial cases with storing 
+; pointers in pointers appropriately.
+; Derived from:
+; char a, b;
+; char *m = &a, *n = &b;
+; *m;
+; *n;
+
+; 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() {
+; CHECK: 15 Total Alias Queries Performed
+; CHECK: 13 no alias responses
+  %M = alloca %T*, align 8
+  %N = alloca %T*, align 8
+  %A = alloca %T, align 8
+  %B = alloca %T, align 8
+
+  store %T* %A, %T** %M
+  store %T* %B, %T** %N
+
+  %AP = load %T** %M ; PartialAlias with %A
+  %BP = load %T** %N ; PartialAlias with %B
+
+  ret void
+}