162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci// Copyright (c) 2019 Facebook 362306a36Sopenharmony_ci#define STACK_MAX_LEN 180 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci/* llvm upstream commit at clang18 662306a36Sopenharmony_ci * https://github.com/llvm/llvm-project/commit/1a2e77cf9e11dbf56b5720c607313a566eebb16e 762306a36Sopenharmony_ci * changed inlining behavior and caused compilation failure as some branch 862306a36Sopenharmony_ci * target distance exceeded 16bit representation which is the maximum for 962306a36Sopenharmony_ci * cpu v1/v2/v3. Macro __BPF_CPU_VERSION__ is later implemented in clang18 1062306a36Sopenharmony_ci * to specify which cpu version is used for compilation. So a smaller 1162306a36Sopenharmony_ci * unroll_count can be set if __BPF_CPU_VERSION__ is less than 4, which 1262306a36Sopenharmony_ci * reduced some branch target distances and resolved the compilation failure. 1362306a36Sopenharmony_ci * 1462306a36Sopenharmony_ci * To capture the case where a developer/ci uses clang18 but the corresponding 1562306a36Sopenharmony_ci * repo checkpoint does not have __BPF_CPU_VERSION__, a smaller unroll_count 1662306a36Sopenharmony_ci * will be set as well to prevent potential compilation failures. 1762306a36Sopenharmony_ci */ 1862306a36Sopenharmony_ci#ifdef __BPF_CPU_VERSION__ 1962306a36Sopenharmony_ci#if __BPF_CPU_VERSION__ < 4 2062306a36Sopenharmony_ci#define UNROLL_COUNT 90 2162306a36Sopenharmony_ci#endif 2262306a36Sopenharmony_ci#elif __clang_major__ == 18 2362306a36Sopenharmony_ci#define UNROLL_COUNT 90 2462306a36Sopenharmony_ci#endif 2562306a36Sopenharmony_ci 2662306a36Sopenharmony_ci#include "pyperf.h" 27