27 lines · c
1// SPDX-License-Identifier: GPL-2.02// Copyright (c) 2019 Facebook3#define STACK_MAX_LEN 1804 5/* llvm upstream commit at clang186 * https://github.com/llvm/llvm-project/commit/1a2e77cf9e11dbf56b5720c607313a566eebb16e7 * changed inlining behavior and caused compilation failure as some branch8 * target distance exceeded 16bit representation which is the maximum for9 * cpu v1/v2/v3. Macro __BPF_CPU_VERSION__ is later implemented in clang1810 * to specify which cpu version is used for compilation. So a smaller11 * unroll_count can be set if __BPF_CPU_VERSION__ is less than 4, which12 * reduced some branch target distances and resolved the compilation failure.13 *14 * To capture the case where a developer/ci uses clang18 but the corresponding15 * repo checkpoint does not have __BPF_CPU_VERSION__, a smaller unroll_count16 * will be set as well to prevent potential compilation failures.17 */18#ifdef __BPF_CPU_VERSION__19#if __BPF_CPU_VERSION__ < 420#define UNROLL_COUNT 9021#endif22#elif __clang_major__ == 1823#define UNROLL_COUNT 9024#endif25 26#include "pyperf.h"27