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diff --git a/test/CodeGen/X86/2011-08-23-PerformSubCombine128.ll b/test/CodeGen/X86/2011-08-23-PerformSubCombine128.ll
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index 0000000..12171ac
--- /dev/null
+++ b/test/CodeGen/X86/2011-08-23-PerformSubCombine128.ll
@@ -0,0 +1,18 @@
+; RUN: llc -march=x86-64 -O2 < %s
+
+define void @test(i64 %add127.tr.i2686) {
+entry:
+ %conv143.i2687 = and i64 %add127.tr.i2686, 72057594037927935
+ %conv76.i2623 = zext i64 %conv143.i2687 to i128
+ %mul148.i2338 = mul i128 0, %conv76.i2623
+ %add149.i2339 = add i128 %mul148.i2338, 0
+ %add.i2303 = add i128 0, 170141183460469229370468033484042534912
+ %add6.i2270 = add i128 %add.i2303, 0
+ %sub58.i2271 = sub i128 %add6.i2270, %add149.i2339
+ %add71.i2272 = add i128 %sub58.i2271, 0
+ %add105.i2273 = add i128 %add71.i2272, 0
+ %add116.i2274 = add i128 %add105.i2273, 0
+ %shr124.i2277 = lshr i128 %add116.i2274, 56
+ %add116.tr.i2280 = trunc i128 %add116.i2274 to i64
+ ret void
+}