| // 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" |
