diff options
Diffstat (limited to 'lib/Target/RISCV/Utils/RISCVMatInt.h')
| -rw-r--r-- | lib/Target/RISCV/Utils/RISCVMatInt.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/lib/Target/RISCV/Utils/RISCVMatInt.h b/lib/Target/RISCV/Utils/RISCVMatInt.h index 49d1d89adc7a..b12ae2eade99 100644 --- a/lib/Target/RISCV/Utils/RISCVMatInt.h +++ b/lib/Target/RISCV/Utils/RISCVMatInt.h @@ -1,15 +1,15 @@ //===- RISCVMatInt.h - Immediate materialisation ---------------*- C++ -*--===// // -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. +// 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 // //===----------------------------------------------------------------------===// #ifndef LLVM_LIB_TARGET_RISCV_MATINT_H #define LLVM_LIB_TARGET_RISCV_MATINT_H +#include "llvm/ADT/APInt.h" #include "llvm/ADT/SmallVector.h" #include "llvm/Support/MachineValueType.h" #include <cstdint> @@ -31,6 +31,14 @@ using InstSeq = SmallVector<Inst, 8>; // order to allow this helper to be used from both the MC layer and during // instruction selection. void generateInstSeq(int64_t Val, bool IsRV64, InstSeq &Res); + +// Helper to estimate the number of instructions required to materialise the +// given immediate value into a register. This estimate does not account for +// `Val` possibly fitting into an immediate, and so may over-estimate. +// +// This will attempt to produce instructions to materialise `Val` as an +// `Size`-bit immediate. `IsRV64` should match the target architecture. +int getIntMatCost(const APInt &Val, unsigned Size, bool IsRV64); } // namespace RISCVMatInt } // namespace llvm #endif |