[llvm] [GlobalISel] LegalizationArtifactCombiner for merge-unmerge->unmerge where src and dst of result would be different scalar/vector types (PR #213086)

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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 -- llvm/include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h --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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<details>
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h b/llvm/include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h
index 96403a443..b7a75dd75 100644
--- a/llvm/include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h
+++ b/llvm/include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h
@@ -1026,10 +1026,10 @@ public:
         if (!isSequenceFromUnmerge(MI, 0, Unmerge, Elt0UnmergeIdx, NumMIElts,
                                    EltSize, false))
           return false;
-        if(!DstTy.isVector() && UnmergeSrcTy.isVector()){
+        if (!DstTy.isVector() && UnmergeSrcTy.isVector()) {
           LegalizeActionStep ActionStep = LI.getAction(
               {TargetOpcode::G_UNMERGE_VALUES, {DstTy, UnmergeSrcTy}});
-          if(ActionStep.Action != LegalizeAction::Legal){
+          if (ActionStep.Action != LegalizeAction::Legal) {
             return false;
           }
         }

``````````

</details>


https://github.com/llvm/llvm-project/pull/213086