erichkeane added a comment.
has this had an RFC btw? I don't believe I've seen one, and this looks like we
probably need one.
================
Comment at: clang/include/clang/AST/ASTContext.h:2262
+ /// Return true if the given vector types are lax-compatible RVV vector
types,
+ /// false otherwise.
+ bool areLaxCompatibleRVVTypes(QualType FirstType, QualType SecondType);
----------------
craig.topper wrote:
> erichkeane wrote:
> > Same here, what is 'lax compatible' mean here? And RVV?
> Do you have the same comment for the AArch64 equivalent on line 2252?
I do NOW!
================
Comment at: clang/lib/CodeGen/TargetInfo.cpp:11369
+ llvm::ScalableVectorType *ResType = nullptr;
+ switch (BT->getKind()) {
+ default:
----------------
craig.topper wrote:
> erichkeane wrote:
> > I wonder if at least the inner type can be picked up ConvertType instead.
> > There doesn't seem to be obvious rhyme/reason to the last argument to
> > ScalableVectorType, so it might not solve that.
> >
> > However, it'll solve the long problem.
> The last argument is 64 / sizeof(element). I should replace the 64 with
> RISCV::RVVBitsPerBlock.
In that case, I'd suggest putting the 'math' in here. It would be much less
difficult to read the tea leaves.
================
Comment at: clang/lib/CodeGen/TargetInfo.cpp:11390
+ ResType = llvm::ScalableVectorType::get(
+ llvm::Type::getIntNTy(getVMContext(), XLen), 64 / XLen);
+ break;
----------------
craig.topper wrote:
> erichkeane wrote:
> > Where is 'XLen' from here?
> It's a member of RISCVABIInfo. It's 64 for riscv64 triple and 32 for riscv32
> triple.
Well, the name is awful :) I'd probably suggest a re-name and hiding it behind
a function call (since that way it can be done on the triple, rather than an
initialized variable perhaps?), but I'm not really in charge of this target
info.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D145088/new/
https://reviews.llvm.org/D145088
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