[llvm] [Mips][BranchFolding] Enable safe tail merging (PR #225382)

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github-actions[bot] wrote:

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


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``````````bash
git-clang-format --diff origin/main HEAD --extensions h,cpp -- llvm/lib/CodeGen/BranchFolding.cpp llvm/lib/Target/Mips/MipsInstrInfo.cpp llvm/lib/Target/Mips/MipsInstrInfo.h llvm/lib/Target/Mips/MipsTargetMachine.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/CodeGen/BranchFolding.cpp b/llvm/lib/CodeGen/BranchFolding.cpp
index fca691434..3dafdcb6d 100644
--- a/llvm/lib/CodeGen/BranchFolding.cpp
+++ b/llvm/lib/CodeGen/BranchFolding.cpp
@@ -754,10 +754,8 @@ unsigned BranchFolder::ComputeSameTails(unsigned CurHash,
     for (MPIterator I = std::prev(CurMPIter); I->getHash() == CurHash; --I) {
       unsigned CommonTailLen;
       if (ProfitableToMerge(CurMPIter->getBlock(), I->getBlock(),
-                            MinCommonTailLength,
-                            CommonTailLen, TrialBBI1, TrialBBI2,
-                            SuccBB, PredBB,
-                            EHScopeMembership,
+                            MinCommonTailLength, CommonTailLen, TrialBBI1,
+                            TrialBBI2, SuccBB, PredBB, EHScopeMembership,
                             AfterBlockPlacement, MBBFreqInfo, PSI) &&
           // Check both tails even if one is an entire block: replacing the
           // other tail can introduce a branch at its start.

``````````

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https://github.com/llvm/llvm-project/pull/225382