| ; With sub reassociation, constant folding can eliminate the uses of %a. | |
| ; | |
| ; RUN: llvm-as < %s | opt -reassociate -instcombine | llvm-dis | grep %a | count 1 | |
| ; PR2047 | |
| define i32 @test(i32 %a, i32 %b, i32 %c) nounwind { | |
| entry: | |
| %tmp3 = sub i32 %a, %b ; <i32> [#uses=1] | |
| %tmp5 = sub i32 %tmp3, %c ; <i32> [#uses=1] | |
| %tmp7 = sub i32 %tmp5, %a ; <i32> [#uses=1] | |
| ret i32 %tmp7 | |
| } | |