1 ; Test a bunch of cases where the cfg simplification code should 2 ; be able to fold PHI nodes into computation in common cases. Folding the PHI 3 ; nodes away allows the branches to be eliminated, performing a simple form of 4 ; 'if conversion'. 5 6 ; RUN: opt < %s -simplifycfg -S > %t.xform 7 ; RUN: not grep phi %t.xform 8 ; RUN: grep ret %t.xform 9 10 declare void @use(i1) 11 12 declare void @use.upgrd.1(i32) 13 14 15 define void @test(i1 %c, i32 %V, i32 %V2) { 16 ; <label>:0 17 br i1 %c, label %T, label %F 18 T: ; preds = %0 19 br label %F 20 F: ; preds = %T, %0 21 %B1 = phi i1 [ true, %0 ], [ false, %T ] ; <i1> [#uses=1] 22 %I6 = phi i32 [ %V, %0 ], [ 0, %T ] ; <i32> [#uses=1] 23 call void @use( i1 %B1 ) 24 call void @use.upgrd.1( i32 %I6 ) 25 ret void 26 } 27 28
