1 files changed, 21 insertions, 0 deletions
diff --git a/test/Analysis/ValueTracking/known-non-equal.ll b/test/Analysis/ValueTracking/known-non-equal.ll
new file mode 100644
index 000000000000..d28b3f4f63a3
--- /dev/null
+++ b/test/Analysis/ValueTracking/known-non-equal.ll
@@ -0,0 +1,21 @@
+; RUN: opt -instsimplify < %s -S | FileCheck %s
+
+; CHECK: define i1 @test
+define i1 @test(i8* %pq, i8 %B) {
+  %q = load i8, i8* %pq, !range !0 ; %q is known nonzero; no known bits
+  %A = add nsw i8 %B, %q
+  %cmp = icmp eq i8 %A, %B
+  ; CHECK: ret i1 false
+  ret i1 %cmp
+}
+
+; CHECK: define i1 @test2
+define i1 @test2(i8 %a, i8 %b) {
+  %A = or i8 %a, 2    ; %A[1] = 1
+  %B = and i8 %b, -3  ; %B[1] = 0
+  %cmp = icmp eq i8 %A, %B ; %A[1] and %B[1] are contradictory.
+  ; CHECK: ret i1 false
+  ret i1 %cmp
+}
+
+!0 = !{ i8 1, i8 5 }