| 123456789101112131415161718192021222324252627 |
- ; Test merging of blocks that only have PHI nodes in them. This tests the case
- ; where the mergedinto block doesn't have any PHI nodes, and is in fact
- ; dominated by the block-to-be-eliminated
- ;
- ; RUN: opt < %s -simplifycfg -S | not grep N:
- ;
- declare i1 @foo()
- define i32 @test(i1 %a, i1 %b) {
- %c = call i1 @foo()
- br i1 %c, label %N, label %P
- P:
- %d = call i1 @foo()
- br i1 %d, label %N, label %Q
- Q:
- br label %N
- N:
- %W = phi i32 [0, %0], [1, %Q], [2, %P]
- ; This block should be foldable into M
- br label %M
- M:
- %R = add i32 %W, 1
- ret i32 %R
- }
|
