[PATCH] D155824: [LoongArch] Support -march=native and -mtune=

[Fangrui Song via Phabricator via cfe-commits]

MaskRay accepted this revision.
MaskRay added a comment.

Some test suggestions



================
Comment at: clang/lib/Basic/Targets/LoongArch.cpp:203
+  StringRef ArchName = getCPU();
+  Builder.defineMacro("__loongarch_arch", Twine("\"") + ArchName + Twine("\""));
+
----------------
Use the `Twine(char)` constructor.


================
Comment at: clang/test/Driver/loongarch-mtune-error.c:1
+// RUN: not %clang --target=loongarch64 -mtune=invalidcpu -fsyntax-only %s 2>&1 | FileCheck %s
+// RUN: not %clang --target=loongarch64 -mtune=generic -fsyntax-only %s 2>&1 | FileCheck %s
----------------
Use `-###` to test the driver. Consider merging this test into the `loongarch-mtune.c`. 


Repository:
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https://reviews.llvm.org/D155824