1 files changed, 35 insertions, 0 deletions
diff --git a/backend/lib/CodeGen/MachineCombinerPattern.cpp b/backend/lib/CodeGen/MachineCombinerPattern.cpp
new file mode 100644
index 0000000..f13ba73
--- /dev/null
+++ b/backend/lib/CodeGen/MachineCombinerPattern.cpp
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "rcc/CodeGen/MachineCombinerPattern.h"
+
+#include <string>
+#include <unordered_set>
+#include <utility>
+
+namespace rcc {
+
+Expected<TargetMachineCombinerInfo>
+TargetMachineCombinerInfo::create(std::vector<MachineCombinerPattern> Patterns) {
+  TargetMachineCombinerInfo Result(std::move(Patterns));
+  std::unordered_set<std::string> Names;
+  for (const MachineCombinerPattern &Pattern : Result.Patterns) {
+    if (Pattern.Name.empty() || !Pattern.RootOpcode.isValid() ||
+        !Pattern.ProducerOpcode.isValid() || !Pattern.ReplacementOpcode.isValid() ||
+        Pattern.ProducerOperand == 0 || Pattern.AddendOperand == 0 ||
+        Pattern.ProducerOperand == Pattern.AddendOperand || !Names.insert(Pattern.Name).second) {
+      return makeUnexpected(ErrorCode::InvalidArgument,
+                            "machine combiner pattern has an invalid target pattern");
+    }
+    Result.MatchTable[Pattern.RootOpcode].push_back(Pattern);
+  }
+  return Result;
+}
+
+std::span<const MachineCombinerPattern>
+TargetMachineCombinerInfo::patterns(Opcode RootOpcode) const noexcept {
+  const auto Position = MatchTable.find(RootOpcode);
+  return Position == MatchTable.end() ? std::span<const MachineCombinerPattern>{}
+                                      : std::span<const MachineCombinerPattern>(Position->second);
+}
+
+} // namespace rcc