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Diffstat (limited to 'test/Transforms/JumpThreading/degenerate-phi.ll')
| -rw-r--r-- | test/Transforms/JumpThreading/degenerate-phi.ll | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/test/Transforms/JumpThreading/degenerate-phi.ll b/test/Transforms/JumpThreading/degenerate-phi.ll new file mode 100644 index 0000000..35d9fde --- /dev/null +++ b/test/Transforms/JumpThreading/degenerate-phi.ll @@ -0,0 +1,24 @@ +; RUN: opt -jump-threading -disable-output %s +; PR9112 + +; This is actually a test for value tracking. Jump threading produces +; "%phi = phi i16" when it removes all edges leading to %unreachable. +; The .ll parser won't let us write that directly since it's invalid code. + +define void @func() nounwind { +entry: + br label %bb + +bb: + br label %bb + +unreachable: + %phi = phi i16 [ %add, %unreachable ], [ 0, %next ] + %add = add i16 0, %phi + %cmp = icmp slt i16 %phi, 0 + br i1 %cmp, label %unreachable, label %next + +next: + br label %unreachable +} + |
