1 files changed, 36 insertions, 0 deletions
diff --git a/test/Analysis/BasicAA/2014-03-18-Maxlookup-reached.ll b/test/Analysis/BasicAA/2014-03-18-Maxlookup-reached.ll
new file mode 100644
index 0000000..bc2512e
--- /dev/null
+++ b/test/Analysis/BasicAA/2014-03-18-Maxlookup-reached.ll
@@ -0,0 +1,36 @@
+; RUN: opt < %s -basicaa -gvn  -S | FileCheck %s
+
+; PR15967
+; BasicAA claims no alias when there is (due to a problem when the MaxLookup
+; limit was reached).
+
+target datalayout = "e"
+
+%struct.foo = type { i32, i32 }
+
+define i32 @main() {
+  %t = alloca %struct.foo, align 4
+  %1 = getelementptr inbounds %struct.foo* %t, i32 0, i32 0
+  store i32 1, i32* %1, align 4
+  %2 = getelementptr inbounds %struct.foo* %t, i64 1
+  %3 = bitcast %struct.foo* %2 to i8*
+  %4 = getelementptr inbounds i8* %3, i32 -1
+  store i8 0, i8* %4
+  %5 = getelementptr inbounds i8* %4, i32 -1
+  store i8 0, i8* %5
+  %6 = getelementptr inbounds i8* %5, i32 -1
+  store i8 0, i8* %6
+  %7 = getelementptr inbounds i8* %6, i32 -1
+  store i8 0, i8* %7
+  %8 = getelementptr inbounds i8* %7, i32 -1
+  store i8 0, i8* %8
+  %9 = getelementptr inbounds i8* %8, i32 -1
+  store i8 0, i8* %9
+  %10 = getelementptr inbounds i8* %9, i32 -1
+  store i8 0, i8* %10
+  %11 = getelementptr inbounds i8* %10, i32 -1
+  store i8 0, i8* %11
+  %12 = load i32* %1, align 4
+  ret i32 %12
+; CHECK: ret i32 %12
+}