[RISCV] Legalize fixed-baseline RV64 MachineIR

1 files changed, 22 insertions, 0 deletions

diff --git a/backend/lib/Target/RISCV/RISCVImmediateMaterialization.h b/backend/lib/Target/RISCV/RISCVImmediateMaterialization.h
new file mode 100644
index 0000000..99d3876
--- /dev/null
+++ b/backend/lib/Target/RISCV/RISCVImmediateMaterialization.h
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_LIB_TARGET_RISCV_RISCVIMMEDIATEMATERIALIZATION_H
+#define RCC_LIB_TARGET_RISCV_RISCVIMMEDIATEMATERIALIZATION_H
+
+#include <cstddef>
+#include <cstdint>
+
+namespace rcc::riscv {
+
+inline constexpr std::size_t DefaultRV64IntegerBuildCost = 5;
+
+[[nodiscard]] std::size_t estimateRV64IntegerBuildCost(std::int64_t Value) noexcept;
+
+[[nodiscard]] bool
+shouldUseRV64IntegerConstantPool(
+    std::int64_t Value,
+    std::size_t MaximumBuildCost = DefaultRV64IntegerBuildCost) noexcept;
+
+} // namespace rcc::riscv
+
+#endif // RCC_LIB_TARGET_RISCV_RISCVIMMEDIATEMATERIALIZATION_H