[PATCH] D89025: [RISCV] Add -mtune support

[Kuan Hsu Chen (Zakk) via Phabricator via cfe-commits]

khchen added a comment.

RISCV supports `-mcpu` with default empty arch to align gcc's `-mtune` behavior since clang didn't support `-mtune` before. But now clang has `-mtune`, is it a good idea to remove those options? (ex. `rocket-rv32/rv64`, `sifive-7-rv32/64`)



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Comment at: clang/test/Driver/riscv-cpus.c:82
+// Check interaction between mcpu and mtune.
+//
+// RUN: %clang -target riscv32 -### -c %s 2>&1 -mcpu=sifive-e31 -mtune=sifive-e76 | FileCheck -check-prefix=MTUNE-E31-MCPU-E76 %s
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maybe we can describe what is expected interaction behavior somewhere.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D89025/new/

https://reviews.llvm.org/D89025