1 files changed, 92 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/CodeGen/MultiHazardRecognizer.cpp b/contrib/llvm-project/llvm/lib/CodeGen/MultiHazardRecognizer.cpp
new file mode 100644
index 000000000000..e4cd92ac4868
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/CodeGen/MultiHazardRecognizer.cpp
@@ -0,0 +1,92 @@
+//===- MultiHazardRecognizer.cpp - Scheduler Support ----------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the MultiHazardRecognizer class, which is a wrapper
+// for a set of ScheduleHazardRecognizer instances
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/MultiHazardRecognizer.h"
+#include "llvm/ADT/STLExtras.h"
+#include <algorithm>
+#include <functional>
+#include <numeric>
+
+using namespace llvm;
+
+void MultiHazardRecognizer::AddHazardRecognizer(
+    std::unique_ptr<ScheduleHazardRecognizer> &&R) {
+  MaxLookAhead = std::max(MaxLookAhead, R->getMaxLookAhead());
+  Recognizers.push_back(std::move(R));
+}
+
+bool MultiHazardRecognizer::atIssueLimit() const {
+  return llvm::any_of(Recognizers,
+                      std::mem_fn(&ScheduleHazardRecognizer::atIssueLimit));
+}
+
+ScheduleHazardRecognizer::HazardType
+MultiHazardRecognizer::getHazardType(SUnit *SU, int Stalls) {
+  for (auto &R : Recognizers) {
+    auto res = R->getHazardType(SU, Stalls);
+    if (res != NoHazard)
+      return res;
+  }
+  return NoHazard;
+}
+
+void MultiHazardRecognizer::Reset() {
+  for (auto &R : Recognizers)
+    R->Reset();
+}
+
+void MultiHazardRecognizer::EmitInstruction(SUnit *SU) {
+  for (auto &R : Recognizers)
+    R->EmitInstruction(SU);
+}
+
+void MultiHazardRecognizer::EmitInstruction(MachineInstr *MI) {
+  for (auto &R : Recognizers)
+    R->EmitInstruction(MI);
+}
+
+unsigned MultiHazardRecognizer::PreEmitNoops(SUnit *SU) {
+  auto MN = [=](unsigned a, std::unique_ptr<ScheduleHazardRecognizer> &R) {
+    return std::max(a, R->PreEmitNoops(SU));
+  };
+  return std::accumulate(Recognizers.begin(), Recognizers.end(), 0u, MN);
+}
+
+unsigned MultiHazardRecognizer::PreEmitNoops(MachineInstr *MI) {
+  auto MN = [=](unsigned a, std::unique_ptr<ScheduleHazardRecognizer> &R) {
+    return std::max(a, R->PreEmitNoops(MI));
+  };
+  return std::accumulate(Recognizers.begin(), Recognizers.end(), 0u, MN);
+}
+
+bool MultiHazardRecognizer::ShouldPreferAnother(SUnit *SU) {
+  auto SPA = [=](std::unique_ptr<ScheduleHazardRecognizer> &R) {
+    return R->ShouldPreferAnother(SU);
+  };
+  return llvm::any_of(Recognizers, SPA);
+}
+
+void MultiHazardRecognizer::AdvanceCycle() {
+  for (auto &R : Recognizers)
+    R->AdvanceCycle();
+}
+
+void MultiHazardRecognizer::RecedeCycle() {
+  for (auto &R : Recognizers)
+    R->RecedeCycle();
+}
+
+void MultiHazardRecognizer::EmitNoop() {
+  for (auto &R : Recognizers)
+    R->EmitNoop();
+}