1 files changed, 9 insertions, 0 deletions
diff --git a/llvm/lib/Target/RISCV/RISCVTargetMachine.cpp b/llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
index b421eba8d442..db5e2f1eeb6f 100644
--- a/llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
+++ b/llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
@@ -39,6 +39,7 @@ extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeRISCVTarget() {
   initializeGlobalISel(*PR);
   initializeRISCVGatherScatterLoweringPass(*PR);
   initializeRISCVMergeBaseOffsetOptPass(*PR);
+  initializeRISCVSExtWRemovalPass(*PR);
   initializeRISCVExpandPseudoPass(*PR);
   initializeRISCVInsertVSETVLIPass(*PR);
 }
@@ -140,6 +141,7 @@ public:
   void addPreEmitPass() override;
   void addPreEmitPass2() override;
   void addPreSched2() override;
+  void addMachineSSAOptimization() override;
   void addPreRegAlloc() override;
 };
 } // namespace
@@ -194,6 +196,13 @@ void RISCVPassConfig::addPreEmitPass2() {
   addPass(createRISCVExpandAtomicPseudoPass());
 }
 
+void RISCVPassConfig::addMachineSSAOptimization() {
+  TargetPassConfig::addMachineSSAOptimization();
+
+  if (TM->getTargetTriple().getArch() == Triple::riscv64)
+    addPass(createRISCVSExtWRemovalPass());
+}
+
 void RISCVPassConfig::addPreRegAlloc() {
   if (TM->getOptLevel() != CodeGenOpt::None)
     addPass(createRISCVMergeBaseOffsetOptPass());