[llvm] [Debuginfo][TailCallElim] Fix #86262: drop the debug location of entry branch (PR #86269)

[Shan Huang via llvm-commits]

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@@ -0,0 +1,57 @@
+; RUN: opt -S -passes=tailcallelim < %s | FileCheck %s
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Apochens wrote:

This test case indeed adds coverage (related to the creation of the recursion accumulator). However, the purpose of the tests is to check that the new entry branch has no debugloc. For this, the previous test is enough. I'll delete the newly added test.

https://github.com/llvm/llvm-project/pull/86269