1 ; Test that PHI nodes and select instructions do not necessarily make stuff 2 ; non-constant. 3 4 ; RUN: opt < %s -globalopt -S | not grep global 5 6 @X = internal global i32 4 ; <i32*> [#uses=2] 7 @Y = internal global i32 5 ; <i32*> [#uses=2] 8 9 define i32 @test1(i1 %C) { 10 %P = select i1 %C, i32* @X, i32* @Y ; <i32*> [#uses=1] 11 %V = load i32* %P ; <i32> [#uses=1] 12 ret i32 %V 13 } 14 15 define i32 @test2(i1 %C) { 16 ; <label>:0 17 br i1 %C, label %T, label %Cont 18 19 T: ; preds = %0 20 br label %Cont 21 22 Cont: ; preds = %T, %0 23 %P = phi i32* [ @X, %0 ], [ @Y, %T ] ; <i32*> [#uses=1] 24 %V = load i32* %P ; <i32> [#uses=1] 25 ret i32 %V 26 } 27 28 29 30 31 32
