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-rw-r--r--test/Transforms/InstCombine/2002-08-02-CastTest.ll11
1 files changed, 11 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/2002-08-02-CastTest.ll b/test/Transforms/InstCombine/2002-08-02-CastTest.ll
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index 0000000000000..54c836c1056c7
--- /dev/null
+++ b/test/Transforms/InstCombine/2002-08-02-CastTest.ll
@@ -0,0 +1,11 @@
+; This testcase is incorrectly getting completely eliminated. There should be
+; SOME instruction named %c here, even if it's a bitwise and.
+;
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep %c
+;
+define i64 @test3(i64 %A) {
+ %c1 = trunc i64 %A to i8 ; <i8> [#uses=1]
+ %c2 = zext i8 %c1 to i64 ; <i64> [#uses=1]
+ ret i64 %c2
+}
+