1 files changed, 75 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/CodeGen/GlobalISel/GIMatchTableExecutor.cpp b/contrib/llvm-project/llvm/lib/CodeGen/GlobalISel/GIMatchTableExecutor.cpp
new file mode 100644
index 000000000000..26752369a771
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/CodeGen/GlobalISel/GIMatchTableExecutor.cpp
@@ -0,0 +1,75 @@
+//===- llvm/CodeGen/GlobalISel/GIMatchTableExecutor.cpp -------------------===//
+//
+// 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 GIMatchTableExecutor class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/GlobalISel/GIMatchTableExecutor.h"
+#include "llvm/CodeGen/GlobalISel/Utils.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/CodeGen/MachineOperand.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+
+#define DEBUG_TYPE "gi-match-table-executor"
+
+using namespace llvm;
+
+GIMatchTableExecutor::MatcherState::MatcherState(unsigned MaxRenderers)
+    : Renderers(MaxRenderers) {}
+
+GIMatchTableExecutor::GIMatchTableExecutor() = default;
+
+bool GIMatchTableExecutor::isOperandImmEqual(const MachineOperand &MO,
+                                             int64_t Value,
+                                             const MachineRegisterInfo &MRI,
+                                             bool Splat) const {
+  if (MO.isReg() && MO.getReg()) {
+    if (auto VRegVal = getIConstantVRegValWithLookThrough(MO.getReg(), MRI))
+      return VRegVal->Value.getSExtValue() == Value;
+
+    if (Splat) {
+      if (auto VRegVal = getIConstantSplatVal(MO.getReg(), MRI))
+        return VRegVal->getSExtValue() == Value;
+    }
+  }
+  return false;
+}
+
+bool GIMatchTableExecutor::isBaseWithConstantOffset(
+    const MachineOperand &Root, const MachineRegisterInfo &MRI) const {
+  if (!Root.isReg())
+    return false;
+
+  MachineInstr *RootI = MRI.getVRegDef(Root.getReg());
+  if (RootI->getOpcode() != TargetOpcode::G_PTR_ADD)
+    return false;
+
+  MachineOperand &RHS = RootI->getOperand(2);
+  MachineInstr *RHSI = MRI.getVRegDef(RHS.getReg());
+  if (RHSI->getOpcode() != TargetOpcode::G_CONSTANT)
+    return false;
+
+  return true;
+}
+
+bool GIMatchTableExecutor::isObviouslySafeToFold(MachineInstr &MI,
+                                                 MachineInstr &IntoMI) const {
+  // Immediate neighbours are already folded.
+  if (MI.getParent() == IntoMI.getParent() &&
+      std::next(MI.getIterator()) == IntoMI.getIterator())
+    return true;
+
+  // Convergent instructions cannot be moved in the CFG.
+  if (MI.isConvergent() && MI.getParent() != IntoMI.getParent())
+    return false;
+
+  return !MI.mayLoadOrStore() && !MI.mayRaiseFPException() &&
+         !MI.hasUnmodeledSideEffects() && MI.implicit_operands().empty();
+}