[llvm] [CodeGen][NPM] Update BranchFolderLegacy make tail merge configurable via flag (PR #135277)

[via llvm-commits]

github-actions[bot] wrote:

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


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
</summary>

``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions cpp,h -- llvm/include/llvm/CodeGen/BranchFoldingPass.h llvm/include/llvm/CodeGen/Passes.h llvm/lib/CodeGen/BranchFolding.cpp llvm/lib/CodeGen/TargetPassConfig.cpp
``````````

</details>

<details>
<summary>
View the diff from clang-format here.
</summary>

``````````diff
diff --git a/llvm/lib/CodeGen/TargetPassConfig.cpp b/llvm/lib/CodeGen/TargetPassConfig.cpp
index c836065f0..bbbcc4611 100644
--- a/llvm/lib/CodeGen/TargetPassConfig.cpp
+++ b/llvm/lib/CodeGen/TargetPassConfig.cpp
@@ -1519,9 +1519,9 @@ void TargetPassConfig::addMachineLateOptimization() {
   addPass(&MachineLateInstrsCleanupID);
 
   // Branch folding must be run after regalloc and prolog/epilog insertion.
-  if(!isPassSubstitutedOrOverridden(&BranchFolderPassID))
+  if (!isPassSubstitutedOrOverridden(&BranchFolderPassID))
     addPass(createBranchFolderPass(!TM->requiresStructuredCFG() &&
-                                  getEnableTailMerge()));
+                                   getEnableTailMerge()));
 
   // Tail duplication.
   // Note that duplicating tail just increases code size and degrades

``````````

</details>


https://github.com/llvm/llvm-project/pull/135277