[replaycache] Implement proof-of-concept of final pass

Author: jochembroekhoff

llvm/llvm-16.0.2/llvm/lib/Target/RISCV/CMakeLists.txt

@@ -46,6 +46,7 @@ add_llvm_target(RISCVCodeGen
   GISel/RISCVInstructionSelector.cpp
   GISel/RISCVLegalizerInfo.cpp
   GISel/RISCVRegisterBankInfo.cpp
+  ReplayCache/ReplayCacheFinal.cpp
 
   LINK_COMPONENTS
   Analysis

llvm/llvm-16.0.2/llvm/lib/Target/RISCV/RISCV.h

@@ -75,6 +75,9 @@ InstructionSelector *createRISCVInstructionSelector(const RISCVTargetMachine &,
                                                     RISCVSubtarget &,
                                                     RISCVRegisterBankInfo &);
 void initializeRISCVDAGToDAGISelPass(PassRegistry &);
+
+FunctionPass *createReplayCacheFinalPass();
+void initializeReplayCacheFinalPass(PassRegistry &);
 } // namespace llvm
 
 #endif

llvm/llvm-16.0.2/llvm/lib/Target/RISCV/RISCVTargetMachine.cpp

@@ -82,6 +82,7 @@ extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeRISCVTarget() {
   initializeRISCVExpandPseudoPass(*PR);
   initializeRISCVInsertVSETVLIPass(*PR);
   initializeRISCVDAGToDAGISelPass(*PR);
+  initializeReplayCacheFinalPass(*PR);
 }
 
 static StringRef computeDataLayout(const Triple &TT) {
@@ -336,6 +337,8 @@ void RISCVPassConfig::addPreEmitPass2() {
   // possibility for other passes to break the requirements for forward
   // progress in the LR/SC block.
   addPass(createRISCVExpandAtomicPseudoPass());
+
+  addPass(createReplayCacheFinalPass());
 }
 
 void RISCVPassConfig::addMachineSSAOptimization() {