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-rw-r--r--lib/Target/RISCV/RISCVInstructionSelector.cpp103
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diff --git a/lib/Target/RISCV/RISCVInstructionSelector.cpp b/lib/Target/RISCV/RISCVInstructionSelector.cpp
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+++ b/lib/Target/RISCV/RISCVInstructionSelector.cpp
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+//===-- RISCVInstructionSelector.cpp -----------------------------*- C++ -*-==//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+/// \file
+/// This file implements the targeting of the InstructionSelector class for
+/// RISCV.
+/// \todo This should be generated by TableGen.
+//===----------------------------------------------------------------------===//
+
+#include "RISCVRegisterBankInfo.h"
+#include "RISCVSubtarget.h"
+#include "RISCVTargetMachine.h"
+#include "llvm/CodeGen/GlobalISel/InstructionSelector.h"
+#include "llvm/CodeGen/GlobalISel/InstructionSelectorImpl.h"
+#include "llvm/Support/Debug.h"
+
+#define DEBUG_TYPE "riscv-isel"
+
+using namespace llvm;
+
+#define GET_GLOBALISEL_PREDICATE_BITSET
+#include "RISCVGenGlobalISel.inc"
+#undef GET_GLOBALISEL_PREDICATE_BITSET
+
+namespace {
+
+class RISCVInstructionSelector : public InstructionSelector {
+public:
+ RISCVInstructionSelector(const RISCVTargetMachine &TM,
+ const RISCVSubtarget &STI,
+ const RISCVRegisterBankInfo &RBI);
+
+ bool select(MachineInstr &I) override;
+ static const char *getName() { return DEBUG_TYPE; }
+
+private:
+ bool selectImpl(MachineInstr &I, CodeGenCoverage &CoverageInfo) const;
+
+ const RISCVSubtarget &STI;
+ const RISCVInstrInfo &TII;
+ const RISCVRegisterInfo &TRI;
+ const RISCVRegisterBankInfo &RBI;
+
+ // FIXME: This is necessary because DAGISel uses "Subtarget->" and GlobalISel
+ // uses "STI." in the code generated by TableGen. We need to unify the name of
+ // Subtarget variable.
+ const RISCVSubtarget *Subtarget = &STI;
+
+#define GET_GLOBALISEL_PREDICATES_DECL
+#include "RISCVGenGlobalISel.inc"
+#undef GET_GLOBALISEL_PREDICATES_DECL
+
+#define GET_GLOBALISEL_TEMPORARIES_DECL
+#include "RISCVGenGlobalISel.inc"
+#undef GET_GLOBALISEL_TEMPORARIES_DECL
+};
+
+} // end anonymous namespace
+
+#define GET_GLOBALISEL_IMPL
+#include "RISCVGenGlobalISel.inc"
+#undef GET_GLOBALISEL_IMPL
+
+RISCVInstructionSelector::RISCVInstructionSelector(
+ const RISCVTargetMachine &TM, const RISCVSubtarget &STI,
+ const RISCVRegisterBankInfo &RBI)
+ : InstructionSelector(), STI(STI), TII(*STI.getInstrInfo()),
+ TRI(*STI.getRegisterInfo()), RBI(RBI),
+
+#define GET_GLOBALISEL_PREDICATES_INIT
+#include "RISCVGenGlobalISel.inc"
+#undef GET_GLOBALISEL_PREDICATES_INIT
+#define GET_GLOBALISEL_TEMPORARIES_INIT
+#include "RISCVGenGlobalISel.inc"
+#undef GET_GLOBALISEL_TEMPORARIES_INIT
+{
+}
+
+bool RISCVInstructionSelector::select(MachineInstr &I) {
+
+ if (!isPreISelGenericOpcode(I.getOpcode())) {
+ // Certain non-generic instructions also need some special handling.
+ return true;
+ }
+
+ if (selectImpl(I, *CoverageInfo))
+ return true;
+
+ return false;
+}
+
+namespace llvm {
+InstructionSelector *
+createRISCVInstructionSelector(const RISCVTargetMachine &TM,
+ RISCVSubtarget &Subtarget,
+ RISCVRegisterBankInfo &RBI) {
+ return new RISCVInstructionSelector(TM, Subtarget, RBI);
+}
+} // end namespace llvm