18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 28c2ecf20Sopenharmony_ci// Copyright (c) 2019 Facebook 38c2ecf20Sopenharmony_ci#define STACK_MAX_LEN 180 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ci/* llvm upstream commit at clang18 68c2ecf20Sopenharmony_ci * https://github.com/llvm/llvm-project/commit/1a2e77cf9e11dbf56b5720c607313a566eebb16e 78c2ecf20Sopenharmony_ci * changed inlining behavior and caused compilation failure as some branch 88c2ecf20Sopenharmony_ci * target distance exceeded 16bit representation which is the maximum for 98c2ecf20Sopenharmony_ci * cpu v1/v2/v3. Macro __BPF_CPU_VERSION__ is later implemented in clang18 108c2ecf20Sopenharmony_ci * to specify which cpu version is used for compilation. So a smaller 118c2ecf20Sopenharmony_ci * unroll_count can be set if __BPF_CPU_VERSION__ is less than 4, which 128c2ecf20Sopenharmony_ci * reduced some branch target distances and resolved the compilation failure. 138c2ecf20Sopenharmony_ci * 148c2ecf20Sopenharmony_ci * To capture the case where a developer/ci uses clang18 but the corresponding 158c2ecf20Sopenharmony_ci * repo checkpoint does not have __BPF_CPU_VERSION__, a smaller unroll_count 168c2ecf20Sopenharmony_ci * will be set as well to prevent potential compilation failures. 178c2ecf20Sopenharmony_ci */ 188c2ecf20Sopenharmony_ci#ifdef __BPF_CPU_VERSION__ 198c2ecf20Sopenharmony_ci#if __BPF_CPU_VERSION__ < 4 208c2ecf20Sopenharmony_ci#define UNROLL_COUNT 90 218c2ecf20Sopenharmony_ci#endif 228c2ecf20Sopenharmony_ci#elif __clang_major__ == 18 238c2ecf20Sopenharmony_ci#define UNROLL_COUNT 90 248c2ecf20Sopenharmony_ci#endif 258c2ecf20Sopenharmony_ci 268c2ecf20Sopenharmony_ci#include "pyperf.h" 27