1 ; Test merging of blocks containing complex expressions, 2 ; with various folding thresholds 3 ; 4 ; RUN: opt < %s -simplifycfg -S -phi-node-folding-threshold=1 | grep N: 5 ; RUN: opt < %s -simplifycfg -S -phi-node-folding-threshold=2 | not grep N: 6 ; RUN: opt < %s -simplifycfg -S -phi-node-folding-threshold=2 | grep M: 7 ; RUN: opt < %s -simplifycfg -S -phi-node-folding-threshold=7 | not grep M: 8 ; 9 10 define i32 @test(i1 %a, i1 %b, i32 %i, i32 %j, i32 %k) { 11 entry: 12 br i1 %a, label %M, label %O 13 O: 14 br i1 %b, label %P, label %Q 15 P: 16 %iaj = add i32 %i, %j 17 %iajak = add i32 %iaj, %k 18 br label %N 19 Q: 20 %ixj = xor i32 %i, %j 21 %ixjxk = xor i32 %ixj, %k 22 br label %N 23 N: 24 ; This phi should be foldable if threshold >= 2 25 %Wp = phi i32 [ %iajak, %P ], [ %ixjxk, %Q ] 26 %Wp2 = add i32 %Wp, %Wp 27 br label %M 28 M: 29 ; This phi should be foldable if threshold >= 7 30 %W = phi i32 [ %Wp2, %N ], [ 2, %entry ] 31 %R = add i32 %W, 1 32 ret i32 %R 33 } 34 35
