2024-11-02 10:51:08 -07:00
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# SPDX-License-Identifier: GPL-2.0
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# Enable available and selected Clang AutoFDO features.
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CFLAGS_AUTOFDO_CLANG := -fdebug-info-for-profiling -mllvm -enable-fs-discriminator=true -mllvm -improved-fs-discriminator=true
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2026-06-02 17:16:38 +02:00
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RUSTFLAGS_AUTOFDO_CLANG := $(if $(call rustc-min-version,109800),-Zdebuginfo-for-profiling,-Zdebug-info-for-profiling) -Cllvm-args=-enable-fs-discriminator=true -Cllvm-args=-improved-fs-discriminator=true
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2024-11-02 10:51:08 -07:00
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ifndef CONFIG_DEBUG_INFO
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CFLAGS_AUTOFDO_CLANG += -gmlt
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2026-03-31 10:57:49 +00:00
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RUSTFLAGS_AUTOFDO_CLANG += -Cdebuginfo=line-tables-only
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2024-11-02 10:51:08 -07:00
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endif
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ifdef CLANG_AUTOFDO_PROFILE
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2024-11-02 10:51:12 -07:00
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CFLAGS_AUTOFDO_CLANG += -fprofile-sample-use=$(CLANG_AUTOFDO_PROFILE) -ffunction-sections
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2024-11-02 10:51:13 -07:00
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CFLAGS_AUTOFDO_CLANG += -fsplit-machine-functions
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2026-03-31 10:57:49 +00:00
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RUSTFLAGS_AUTOFDO_CLANG += -Zprofile-sample-use=$(CLANG_AUTOFDO_PROFILE) -Zfunction-sections=y
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RUSTFLAGS_AUTOFDO_CLANG += -Cllvm-args=-split-machine-functions
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2024-11-02 10:51:08 -07:00
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endif
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ifdef CONFIG_LTO_CLANG_THIN
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ifdef CLANG_AUTOFDO_PROFILE
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KBUILD_LDFLAGS += --lto-sample-profile=$(CLANG_AUTOFDO_PROFILE)
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endif
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KBUILD_LDFLAGS += --mllvm=-enable-fs-discriminator=true --mllvm=-improved-fs-discriminator=true -plugin-opt=thinlto
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2024-11-02 10:51:13 -07:00
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KBUILD_LDFLAGS += -plugin-opt=-split-machine-functions
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2024-11-02 10:51:08 -07:00
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endif
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2026-03-31 10:57:49 +00:00
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export CFLAGS_AUTOFDO_CLANG RUSTFLAGS_AUTOFDO_CLANG
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