1 files changed, 11 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/zext.ll b/test/Transforms/InstCombine/zext.ll
new file mode 100644
index 0000000..10eabf7
--- /dev/null
+++ b/test/Transforms/InstCombine/zext.ll
@@ -0,0 +1,11 @@
+; Tests to make sure elimination of casts is working correctly
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+define i64 @test_sext_zext(i16 %A) {
+        %c1 = zext i16 %A to i32                ; <i32> [#uses=1]
+        %c2 = sext i32 %c1 to i64               ; <i64> [#uses=1]
+        ret i64 %c2
+; CHECK-NOT: %c1
+; CHECK: %c2 = zext i16 %A to i64
+; CHECK: ret i64 %c2
+}