[llvm] [TableGen][GISel] Don't copy dead def from a sub-instruction to the root (PR #121094)

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


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``````````bash
git-clang-format --diff c29536b0336586b2ed7bafedf82c9f4e254cfaa6 d2a0e951d6682796595f680192ca1bef7881ced3 --extensions cpp -- llvm/utils/TableGen/GlobalISelEmitter.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/utils/TableGen/GlobalISelEmitter.cpp b/llvm/utils/TableGen/GlobalISelEmitter.cpp
index 4d67aed0ae..57bf192f54 100644
--- a/llvm/utils/TableGen/GlobalISelEmitter.cpp
+++ b/llvm/utils/TableGen/GlobalISelEmitter.cpp
@@ -404,9 +404,10 @@ private:
   createInstructionRenderer(action_iterator InsertPt, RuleMatcher &M,
                             const TreePatternNode &Dst) const;
 
-  Expected<action_iterator> importExplicitDefRenderers(
-      action_iterator InsertPt, RuleMatcher &M, BuildMIAction &DstMIBuilder,
-      const TreePatternNode &Dst, bool IsRoot) const;
+  Expected<action_iterator>
+  importExplicitDefRenderers(action_iterator InsertPt, RuleMatcher &M,
+                             BuildMIAction &DstMIBuilder,
+                             const TreePatternNode &Dst, bool IsRoot) const;
 
   Expected<action_iterator>
   importExplicitUseRenderers(action_iterator InsertPt, RuleMatcher &M,

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https://github.com/llvm/llvm-project/pull/121094