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