1 ; RUN: opt < %s -instcombine -S | not grep 34 2 3 define i32 @test(i32 %X) { 4 ; Do not fold into shr X, 34, as this uses undefined behavior! 5 %Y = ashr i32 %X, 17 ; <i32> [#uses=1] 6 %Z = ashr i32 %Y, 17 ; <i32> [#uses=1] 7 ret i32 %Z 8 } 9 10 define i32 @test2(i32 %X) { 11 ; Do not fold into shl X, 34, as this uses undefined behavior! 12 %Y = shl i32 %X, 17 ; <i32> [#uses=1] 13 %Z = shl i32 %Y, 17 ; <i32> [#uses=1] 14 ret i32 %Z 15 } 16
