[all-commits] [llvm/llvm-project] cfa709: [RISCV] Add -mtune support
Kito Cheng via All-commits
all-commits at lists.llvm.org
Thu Oct 15 22:55:46 PDT 2020
Branch: refs/heads/master
Home: https://github.com/llvm/llvm-project
Commit: cfa7094e49cfb7e37a84c0aa57c85c64c0581d17
https://github.com/llvm/llvm-project/commit/cfa7094e49cfb7e37a84c0aa57c85c64c0581d17
Author: Kito Cheng <kito.cheng at sifive.com>
Date: 2020-10-16 (Fri, 16 Oct 2020)
Changed paths:
M clang/include/clang/Driver/Options.td
M clang/lib/Basic/Targets/RISCV.cpp
M clang/lib/Basic/Targets/RISCV.h
M clang/lib/Driver/ToolChains/Clang.cpp
M clang/test/Driver/riscv-cpus.c
M clang/test/Misc/target-invalid-cpu-note.c
M llvm/include/llvm/Support/RISCVTargetParser.def
M llvm/include/llvm/Support/TargetParser.h
M llvm/lib/Support/TargetParser.cpp
M llvm/lib/Target/RISCV/RISCVAsmPrinter.cpp
M llvm/lib/Target/RISCV/RISCVSubtarget.cpp
M llvm/lib/Target/RISCV/RISCVSubtarget.h
M llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
Log Message:
-----------
[RISCV] Add -mtune support
- The goal of this patch is improve option compatible with RISCV-V GCC,
-mcpu support on GCC side will sent patch in next few days.
- -mtune only affect the pipeline model and non-arch/extension related
target feature, e.g. instruction fusion; in td file it called
TuneFeatures, which is introduced by X86 back-end[1].
- -mtune accept all valid option for -mcpu and extra alias processor
option, e.g. `generic`, `rocket` and `sifive-7-series`, the purpose is
option compatible with RISCV-V GCC.
- Processor alias for -mtune will resolve according the current target arch,
rv32 or rv64, e.g. `rocket` will resolve to `rocket-rv32` or `rocket-rv64`.
- Interaction between -mcpu and -mtune:
* -mtune has higher priority than -mcpu for pipeline model and
TuneFeatures.
[1] https://reviews.llvm.org/D85165
Reviewed By: luismarques
Differential Revision: https://reviews.llvm.org/D89025
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