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diff --git a/test/Transforms/InstCombine/zext-fold.ll b/test/Transforms/InstCombine/zext-fold.ll
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+++ b/test/Transforms/InstCombine/zext-fold.ll
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+; RUN: opt < %s -instcombine -S | grep {zext } | count 1
+; PR1570
+
+define i32 @test2(float %X, float %Y) {
+entry:
+ %tmp3 = fcmp uno float %X, %Y ; <i1> [#uses=1]
+ %tmp34 = zext i1 %tmp3 to i8 ; <i8> [#uses=1]
+ %tmp = xor i8 %tmp34, 1 ; <i8> [#uses=1]
+ %toBoolnot5 = zext i8 %tmp to i32 ; <i32> [#uses=1]
+ ret i32 %toBoolnot5
+}
+