eopXD added inline comments.
================
Comment at: llvm/lib/Target/RISCV/RISCVSubtarget.cpp:134
"maximum!");
+ assert(RVVVectorBitsMin >= ZvlLen &&
+ "Minimum V extension vector length should be at least the length "
----------------
eopXD wrote:
> craig.topper wrote:
> > eopXD wrote:
> > > craig.topper wrote:
> > > > HsiangKai wrote:
> > > > > Should it be `RVVVectorBitsMin < ZvlLen`?
> > > > >
> > > > > I suggest to return 0 and print a warning message for users.
> > > > This isn't a good place to print warnings. It would just be a random
> > > > message printed to stderr without going through any of clang's
> > > > diagnostic infrastructure.
> > > I think moving the check to `initializeSubtargetDependencies` and use
> > > `report_fatal_error` will be a more appropriate approach?
> > I think that causes clang to generate a crash report and telling the user
> > to file a bug.
> >
> > Forgot to mention, all this code is also being modified by D107290
> I see, then my proposal is invalid.
>
> I am not yet that familiar with the code base. I see `RISCVFrameLowering.cpp`
> using `LLVMContext::diagnose`, but `RISCVSubtarget` here doesn't seem to have
> access to `LLVMContext`.
>
> May you recommend a pointer to some diagnose function I can use to tell the
> user this is an invalid setting between `RVVVectorBitsMin`(from
> `riscv-v-vector-bits-min`) and `ZvlLen` (from `-march=zvl*b`)?
I see code under `RISCVSubtarget::initializeSubtargetDependencies` also using
`report_fatal_error`:
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D108694/new/
https://reviews.llvm.org/D108694
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
