[llvm] [CFIInstrInserter] A test showing the need to handle `cfi_escape`. (PR #128211)

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``````````bash
git-clang-format --diff 81a8b2004508a47f733bd8d1c063f7333577cf59 a16a0f1536f6be7b9e453f9c612144471527c484 --extensions cpp,h -- llvm/lib/Target/RISCV/RISCVFrameLowering.cpp llvm/lib/Target/RISCV/RISCVFrameLowering.h 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/RISCVTargetMachine.cpp b/llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
index e3cfd08937..967026c589 100644
--- a/llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
+++ b/llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
@@ -117,10 +117,10 @@ static cl::opt<bool>
                            cl::desc("Enable Machine Pipeliner for RISC-V"),
                            cl::init(false), cl::Hidden);
 
-static cl::opt<bool>
-    EnableCFIInstrInserter("riscv-enable-cfi-instr-inserter",
-                           cl::desc("Enable CFI Instruction Inserter for RISC-V"),
-                           cl::init(false), cl::Hidden);
+static cl::opt<bool> EnableCFIInstrInserter(
+    "riscv-enable-cfi-instr-inserter",
+    cl::desc("Enable CFI Instruction Inserter for RISC-V"), cl::init(false),
+    cl::Hidden);
 
 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeRISCVTarget() {
   RegisterTargetMachine<RISCVTargetMachine> X(getTheRISCV32Target());

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https://github.com/llvm/llvm-project/pull/128211