[llvm] [RISCV] Implement trampolines for rv64 (PR #96309)

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``````````bash
git-clang-format --diff 79a0b665934a3de1113d1df90a9d677f39d9389a ebaf74f98b59a1be4800d1b7d5569e78308264ac --extensions cpp,h -- llvm/lib/Target/RISCV/RISCVISelLowering.cpp llvm/lib/Target/RISCV/RISCVISelLowering.h
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index afb69c8aef..90def203c9 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -7297,7 +7297,7 @@ SDValue RISCVTargetLowering::lowerINIT_TRAMPOLINE(SDValue Op,
   // Create an MCCodeEmitter to encode instructions.
   TargetLoweringObjectFile *TLO = getTargetMachine().getObjFileLowering();
   assert(TLO);
-  MCContext& MCCtx = TLO->getContext();
+  MCContext &MCCtx = TLO->getContext();
 
   std::unique_ptr<MCCodeEmitter> CodeEmitter(
       createRISCVMCCodeEmitter(*getTargetMachine().getMCInstrInfo(), MCCtx));
@@ -7356,8 +7356,7 @@ SDValue RISCVTargetLowering::lowerINIT_TRAMPOLINE(SDValue Op,
   Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
                      DAG.getConstant(4, dl, MVT::i64));
   OutChains[1] = DAG.getTruncStore(
-      Root, dl,
-      DAG.getConstant(LD_X5_TargetFunctionOffset, dl, MVT::i64), Addr,
+      Root, dl, DAG.getConstant(LD_X5_TargetFunctionOffset, dl, MVT::i64), Addr,
       MachinePointerInfo(TrmpAddr, 4), MVT::i32);
 
   // ld t2, 16(t2)
@@ -7368,8 +7367,8 @@ SDValue RISCVTargetLowering::lowerINIT_TRAMPOLINE(SDValue Op,
   Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
                      DAG.getConstant(8, dl, MVT::i64));
   OutChains[2] = DAG.getTruncStore(
-      Root, dl, DAG.getConstant(LD_X7_StaticChainOffset, dl, MVT::i64),
-      Addr, MachinePointerInfo(TrmpAddr, 8), MVT::i32);
+      Root, dl, DAG.getConstant(LD_X7_StaticChainOffset, dl, MVT::i64), Addr,
+      MachinePointerInfo(TrmpAddr, 8), MVT::i32);
 
   // jalr t0
   // Jump to the function.

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https://github.com/llvm/llvm-project/pull/96309