[PATCH] D72972: [WebAssembly] Add experimental multivalue calling ABI

[Heejin Ahn via Phabricator via cfe-commits]

aheejin accepted this revision.
aheejin added inline comments.
This revision is now accepted and ready to land.


================
Comment at: clang/lib/CodeGen/TargetInfo.cpp:741
+  explicit WebAssemblyABIInfo(CodeGen::CodeGenTypes &CGT, ABIKind _Kind)
+      : SwiftABIInfo(CGT), defaultInfo(CGT), Kind(_Kind) {}
 
----------------
tlively wrote:
> aheejin wrote:
> > Nit: Do we need `_`?
> I was cargo culting the ARM targets here. It may be that some compilers get confused when the type and variable have the same name in this situation?
I don't think so. We have many cases that use the same name for a parameter and its corresponding field in constructors.


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Comment at: clang/test/CodeGen/wasm-arguments.c:19
+
 // Structs should be passed byval and not split up.
+// WEBASSEMBLY32: define void @struct_arg(%struct.s1* byval(%struct.s1) align 4 %i)
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tlively wrote:
> aheejin wrote:
> > The comment here includes only the MVP case. Shouldn't we update this? Ditto for the other comments below. 
> I think there is some value in having the comments describe the expected stable behavior and let the "EXPERIMENTAL" speak for itself. The only thing I can think of adding to the comment is "... in non-experimental ABIs", but that doesn't seem too valuable to have.
Then we can maybe add one-line comment for `EXPERIMENTAL-MV`s too in case its results deviates from MVP?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D72972/new/

https://reviews.llvm.org/D72972