1# SPDX-License-Identifier: GPL-2.0
 2
 3# Enable available and selected Clang AutoFDO features.
 4
 5CFLAGS_AUTOFDO_CLANG := -fdebug-info-for-profiling -mllvm -enable-fs-discriminator=true -mllvm -improved-fs-discriminator=true
 6
 7ifndef CONFIG_DEBUG_INFO
 8  CFLAGS_AUTOFDO_CLANG += -gmlt
 9endif
10
11ifdef CLANG_AUTOFDO_PROFILE
12  CFLAGS_AUTOFDO_CLANG += -fprofile-sample-use=$(CLANG_AUTOFDO_PROFILE) -ffunction-sections
13  CFLAGS_AUTOFDO_CLANG += -fsplit-machine-functions
14endif
15
16ifdef CONFIG_LTO_CLANG_THIN
17  ifdef CLANG_AUTOFDO_PROFILE
18    KBUILD_LDFLAGS += --lto-sample-profile=$(CLANG_AUTOFDO_PROFILE)
19  endif
20  KBUILD_LDFLAGS += --mllvm=-enable-fs-discriminator=true --mllvm=-improved-fs-discriminator=true -plugin-opt=thinlto
21  KBUILD_LDFLAGS += -plugin-opt=-split-machine-functions
22endif
23
24export CFLAGS_AUTOFDO_CLANG