1315ad878SRong Xu# SPDX-License-Identifier: GPL-2.0 2315ad878SRong Xu 3315ad878SRong Xu# Enable available and selected Clang AutoFDO features. 4315ad878SRong Xu 5315ad878SRong XuCFLAGS_AUTOFDO_CLANG := -fdebug-info-for-profiling -mllvm -enable-fs-discriminator=true -mllvm -improved-fs-discriminator=true 6*7594302dSMiguel OjedaRUSTFLAGS_AUTOFDO_CLANG := $(if $(call rustc-min-version,109800),-Zdebuginfo-for-profiling,-Zdebug-info-for-profiling) -Cllvm-args=-enable-fs-discriminator=true -Cllvm-args=-improved-fs-discriminator=true 7315ad878SRong Xu 8315ad878SRong Xuifndef CONFIG_DEBUG_INFO 9315ad878SRong Xu CFLAGS_AUTOFDO_CLANG += -gmlt 10a960c2cdSAlice Ryhl RUSTFLAGS_AUTOFDO_CLANG += -Cdebuginfo=line-tables-only 11315ad878SRong Xuendif 12315ad878SRong Xu 13315ad878SRong Xuifdef CLANG_AUTOFDO_PROFILE 140847420fSRong Xu CFLAGS_AUTOFDO_CLANG += -fprofile-sample-use=$(CLANG_AUTOFDO_PROFILE) -ffunction-sections 152fd65f7aSRong Xu CFLAGS_AUTOFDO_CLANG += -fsplit-machine-functions 16a960c2cdSAlice Ryhl RUSTFLAGS_AUTOFDO_CLANG += -Zprofile-sample-use=$(CLANG_AUTOFDO_PROFILE) -Zfunction-sections=y 17a960c2cdSAlice Ryhl RUSTFLAGS_AUTOFDO_CLANG += -Cllvm-args=-split-machine-functions 18315ad878SRong Xuendif 19315ad878SRong Xu 20315ad878SRong Xuifdef CONFIG_LTO_CLANG_THIN 21315ad878SRong Xu ifdef CLANG_AUTOFDO_PROFILE 22315ad878SRong Xu KBUILD_LDFLAGS += --lto-sample-profile=$(CLANG_AUTOFDO_PROFILE) 23315ad878SRong Xu endif 24315ad878SRong Xu KBUILD_LDFLAGS += --mllvm=-enable-fs-discriminator=true --mllvm=-improved-fs-discriminator=true -plugin-opt=thinlto 252fd65f7aSRong Xu KBUILD_LDFLAGS += -plugin-opt=-split-machine-functions 26315ad878SRong Xuendif 27315ad878SRong Xu 28a960c2cdSAlice Ryhlexport CFLAGS_AUTOFDO_CLANG RUSTFLAGS_AUTOFDO_CLANG 29