[llvm] Reland "[LICM] Sink unused l-invariant loads in preheader #157559" (PR #170204)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Transforms/Scalar/IndVarSimplify.cpp llvm/lib/Transforms/Scalar/LICM.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/Transforms/Scalar/LICM.cpp b/llvm/lib/Transforms/Scalar/LICM.cpp
index b513aeda5..3b7c09c5a 100644
--- a/llvm/lib/Transforms/Scalar/LICM.cpp
+++ b/llvm/lib/Transforms/Scalar/LICM.cpp
@@ -1573,9 +1573,9 @@ static void moveInstructionBefore(Instruction &I, BasicBlock::iterator Dest,
 
 // An in-loop user keeps I live in the loop. An unsunk preheader user would no
 // longer be dominated by I after it is sunk.
-static bool hasBlockingUser(
-    Instruction &I, Loop &L, BasicBlock &Preheader,
-    const SmallPtrSetImpl<Instruction *> &SinkCandidates) {
+static bool
+hasBlockingUser(Instruction &I, Loop &L, BasicBlock &Preheader,
+                const SmallPtrSetImpl<Instruction *> &SinkCandidates) {
   return llvm::any_of(I.uses(), [&](const Use &U) {
     auto *UserI = cast<Instruction>(U.getUser());
     auto *PN = dyn_cast<PHINode>(UserI);

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https://github.com/llvm/llvm-project/pull/170204