Imported Upstream version 5.18.0.179

Former-commit-id: 67aa10e65b237e1c4537630979ee99ebe1374215

external/llvm/lib/Target/Mips/MipsModuleISelDAGToDAG.cpp

@@ -0,0 +1,54 @@
+//===----------------------------------------------------------------------===//
+// Instruction Selector Subtarget Control
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+// This file defines a pass used to change the subtarget for the
+// Mips Instruction selector.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Mips.h"
+#include "MipsTargetMachine.h"
+#include "llvm/CodeGen/TargetPassConfig.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "mips-isel"
+
+namespace {
+  class MipsModuleDAGToDAGISel : public MachineFunctionPass {
+  public:
+    static char ID;
+
+    MipsModuleDAGToDAGISel() : MachineFunctionPass(ID) {}
+
+    // Pass Name
+    StringRef getPassName() const override {
+      return "MIPS DAG->DAG Pattern Instruction Selection";
+    }
+
+    void getAnalysisUsage(AnalysisUsage &AU) const override {
+      AU.addRequired<TargetPassConfig>();
+      MachineFunctionPass::getAnalysisUsage(AU);
+    }
+
+    bool runOnMachineFunction(MachineFunction &MF) override;
+  };
+
+  char MipsModuleDAGToDAGISel::ID = 0;
+}
+
+bool MipsModuleDAGToDAGISel::runOnMachineFunction(MachineFunction &MF) {
+  DEBUG(errs() << "In MipsModuleDAGToDAGISel::runMachineFunction\n");
+  auto &TPC = getAnalysis<TargetPassConfig>();
+  auto &TM = TPC.getTM<MipsTargetMachine>();
+  TM.resetSubtarget(&MF);
+  return false;
+}
+
+llvm::FunctionPass *llvm::createMipsModuleISelDagPass() {
+  return new MipsModuleDAGToDAGISel();
+}