--- /dev/null
+; RUN: opt %s -S -disable-basicaa -cfl-steens-aa -aa-eval -print-all-alias-modref-info 2>&1 | FileCheck %s
+;
+; Regression: we weren't properly checking constexpr selects.
+
+@g = extern_weak dso_local global i32, align 4
+@g2 = extern_weak dso_local global i32, align 4
+@g3 = extern_weak dso_local global i32, align 4
+
+; CHECK-LABEL: Function: foo
+; CHECK: NoAlias: i32* select (i1 icmp ne (i32* @g, i32* null), i32* @g2, i32* @g3), i32** %a
+; CHECK: NoAlias: i32* %b, i32** %a
+; CHECK: MayAlias: i32* %b, i32* select (i1 icmp ne (i32* @g, i32* null), i32* @g2, i32* @g3)
+; CHECK: NoAlias: i32* @g2, i32** %a
+; CHECK: MayAlias: i32* @g2, i32* select (i1 icmp ne (i32* @g, i32* null), i32* @g2, i32* @g3)
+; CHECK: MayAlias: i32* %b, i32* @g2
+; CHECK: NoAlias: i32* @g3, i32** %a
+; CHECK: MayAlias: i32* @g3, i32* select (i1 icmp ne (i32* @g, i32* null), i32* @g2, i32* @g3)
+; CHECK: MayAlias: i32* %b, i32* @g3
+; CHECK: MayAlias: i32* @g2, i32* @g3
+
+define void @foo() {
+entry:
+ %a = alloca i32*, align 8
+ store i32* select (i1 icmp ne (i32* @g, i32* null), i32* @g2, i32* @g3), i32** %a
+ %b = load i32*, i32** %a
+ %c = load i32, i32* %b
+ %d = load i32, i32* @g2
+ %e = load i32, i32* @g3
+ ret void
+}