[llvm] [LoopInterchange] Don't consider loops with BTC=0 (PR #167113)

[via llvm-commits]

github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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<details>
<summary>
You can test this locally with the following command:
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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Transforms/Scalar/LoopInterchange.cpp --diff_from_common_commit
``````````

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changing `origin/main` to the base branch/commit you want to compare against.
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/Scalar/LoopInterchange.cpp b/llvm/lib/Transforms/Scalar/LoopInterchange.cpp
index 11e1723eb..0e364c8da 100644
--- a/llvm/lib/Transforms/Scalar/LoopInterchange.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopInterchange.cpp
@@ -1821,7 +1821,8 @@ static void moveLCSSAPhis(BasicBlock *InnerExit, BasicBlock *InnerHeader,
 
     assert(all_of(P.users(),
                   [OuterHeader, OuterExit, IncI, InnerHeader](User *U) {
-		  dbgs() << "USER: "; U->dump();
+                    dbgs() << "USER: ";
+                    U->dump();
                     return (cast<PHINode>(U)->getParent() == OuterHeader &&
                             IncI->getParent() == InnerHeader) ||
                            cast<PHINode>(U)->getParent() == OuterExit;

``````````

</details>


https://github.com/llvm/llvm-project/pull/167113