[llvm] [UniformityAnalysis] Fix nodivergencesource calls (PR #197656)

[Jay Foad via llvm-commits]

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@@ -0,0 +1,18 @@
+; RUN: opt -mtriple amdgcn-- -passes='print<uniformity>' -disable-output %s 2>&1 | FileCheck %s
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jayfoad wrote:

This test could go in the existing `nodivergencesource.ll`

https://github.com/llvm/llvm-project/pull/197656