[llvm] [RISCV] Add a pass to remove ADDI by reassociating to fold into load/store address. (PR #127151)

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git-clang-format --diff 5586541d220ebbe27d8dea039d0165c3b2694b06 294a67864ca1a3627de6bf49397ce6782556997f --extensions cpp,h -- llvm/lib/Target/RISCV/RISCVFoldMemOffset.cpp llvm/lib/Target/RISCV/RISCV.h llvm/lib/Target/RISCV/RISCVMergeBaseOffset.cpp llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/RISCV/RISCVFoldMemOffset.cpp b/llvm/lib/Target/RISCV/RISCVFoldMemOffset.cpp
index b61eda499f..5c457bbd72 100644
--- a/llvm/lib/Target/RISCV/RISCVFoldMemOffset.cpp
+++ b/llvm/lib/Target/RISCV/RISCVFoldMemOffset.cpp
@@ -223,8 +223,8 @@ bool RISCVFoldMemOffset::foldOffset(
       // If the offset is new or changed, add the destination register to the
       // work list.
       int64_t OffsetVal = Offset.getValue();
-      auto P = RegToOffsetMap.try_emplace(User.getOperand(0).getReg(),
-                                          OffsetVal);
+      auto P =
+          RegToOffsetMap.try_emplace(User.getOperand(0).getReg(), OffsetVal);
       if (P.second) {
         Worklist.push(User.getOperand(0).getReg());
       } else if (P.first->second != OffsetVal) {

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https://github.com/llvm/llvm-project/pull/127151