| # SPDX-License-Identifier: GPL-2.0 |
| |
| # Enable available and selected Clang AutoFDO features. |
| |
| CFLAGS_AUTOFDO_CLANG := -fdebug-info-for-profiling -mllvm -enable-fs-discriminator=true -mllvm -improved-fs-discriminator=true |
| |
| ifndef CONFIG_DEBUG_INFO |
| CFLAGS_AUTOFDO_CLANG += -gmlt |
| endif |
| |
| ifdef CLANG_AUTOFDO_PROFILE |
| CFLAGS_AUTOFDO_CLANG += -fprofile-sample-use=$(CLANG_AUTOFDO_PROFILE) -ffunction-sections |
| CFLAGS_AUTOFDO_CLANG += -fsplit-machine-functions |
| endif |
| |
| ifdef CONFIG_LTO_CLANG_THIN |
| ifdef CLANG_AUTOFDO_PROFILE |
| KBUILD_LDFLAGS += --lto-sample-profile=$(CLANG_AUTOFDO_PROFILE) |
| endif |
| KBUILD_LDFLAGS += --mllvm=-enable-fs-discriminator=true --mllvm=-improved-fs-discriminator=true -plugin-opt=thinlto |
| KBUILD_LDFLAGS += -plugin-opt=-split-machine-functions |
| endif |
| |
| export CFLAGS_AUTOFDO_CLANG |
