1; Test merging of blocks that only have PHI nodes in them. This tests the case 2; where the mergedinto block doesn't have any PHI nodes, and is in fact 3; dominated by the block-to-be-eliminated 4; 5; RUN: opt < %s -simplifycfg -S | not grep N: 6; 7 8declare i1 @foo() 9 10define i32 @test(i1 %a, i1 %b) { 11 %c = call i1 @foo() 12 br i1 %c, label %N, label %P 13P: 14 %d = call i1 @foo() 15 br i1 %d, label %N, label %Q 16Q: 17 br label %N 18N: 19 %W = phi i32 [0, %0], [1, %Q], [2, %P] 20 ; This block should be foldable into M 21 br label %M 22 23M: 24 %R = add i32 %W, 1 25 ret i32 %R 26} 27 28