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