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+; With sub reassociation, constant folding can eliminate the two 12 constants.
+;
+; RUN: llvm-as < %s | opt -reassociate -constprop -dce | llvm-dis | not grep 12
+
+define i32 @test(i32 %A, i32 %B, i32 %C, i32 %D) {
+ %M = add i32 %A, 12 ; <i32> [#uses=1]
+ %N = add i32 %M, %B ; <i32> [#uses=1]
+ %O = add i32 %N, %C ; <i32> [#uses=1]
+ %P = sub i32 %D, %O ; <i32> [#uses=1]
+ %Q = add i32 %P, 12 ; <i32> [#uses=1]
+ ret i32 %Q
+}
+