[llvm] [RISCV] Further improved exact VLEN lowering for mul reductions (PR #192688)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Target/RISCV/RISCVCodeGenPrepare.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/Target/RISCV/RISCVCodeGenPrepare.cpp b/llvm/lib/Target/RISCV/RISCVCodeGenPrepare.cpp
index 061910b93..0b0313384 100644
--- a/llvm/lib/Target/RISCV/RISCVCodeGenPrepare.cpp
+++ b/llvm/lib/Target/RISCV/RISCVCodeGenPrepare.cpp
@@ -298,13 +298,13 @@ bool RISCVCodeGenPrepare::expandMulReduction(IntrinsicInst &II) {
     assert(isPowerOf2_32(NumM1) && NumM1 <= 8);
     SmallVector<Value *, 8> Pieces(NumM1);
     for (unsigned i = 0; i < NumM1; i++)
-      Pieces[i] = Builder.CreateExtractVector(M1Ty, TmpVec,
-                                              (uint64_t)(i * M1VF));
+      Pieces[i] =
+          Builder.CreateExtractVector(M1Ty, TmpVec, (uint64_t)(i * M1VF));
 
     while (Pieces.size() > 1) {
       for (unsigned i = 0; i < Pieces.size() / 2; i++)
-        Pieces[i] = Builder.CreateMul(Pieces[i * 2], Pieces[i * 2 + 1],
-                                      "bin.rdx");
+        Pieces[i] =
+            Builder.CreateMul(Pieces[i * 2], Pieces[i * 2 + 1], "bin.rdx");
       Pieces.truncate(Pieces.size() / 2);
     }
     TmpVec = Pieces[0];

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https://github.com/llvm/llvm-project/pull/192688