1 ; With sub reassociation, constant folding can eliminate the uses of %a. 2 ; 3 ; RUN: opt < %s -reassociate -instcombine -S | grep %a | count 1 4 ; PR2047 5 6 define i32 @test(i32 %a, i32 %b, i32 %c) nounwind { 7 entry: 8 %tmp3 = sub i32 %a, %b ; <i32> [#uses=1] 9 %tmp5 = sub i32 %tmp3, %c ; <i32> [#uses=1] 10 %tmp7 = sub i32 %tmp5, %a ; <i32> [#uses=1] 11 ret i32 %tmp7 12 } 13 14
