[PATCH] D142144: [RISCV][Driver] Add -mrvv-vector-bits= option similar to -msve-vector-bits=

[Fraser Cormack via Phabricator via cfe-commits]

frasercrmck added inline comments.


================
Comment at: clang/lib/Driver/ToolChains/Clang.cpp:2150
+          Args.MakeArgString("-mvscale-min=" + llvm::Twine(VScaleMin)));
+    } else if (!Val.equals("scalable")) {
+      // Handle the unsupported values passed to mrvv-vector-bits.
----------------
craig.topper wrote:
> frasercrmck wrote:
> > Is this check right? I don't see mention of "scalable" in the commit description. Should this be a plain `else`?
> "scalable" allows you to cancel the option appearing earlier on the command line. Similar to why most bool options have a "no-" version. It's let you do thing like append to CFLAGS to override a global setting in a make file.
Makes sense, thanks. I'm happy to include it as an option value, now that it's documented.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D142144/new/

https://reviews.llvm.org/D142144