[clang] [SYCL] Basic code generation for SYCL kernel caller offload entry point functions. (PR #133030)

[Tom Honermann via cfe-commits]

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@@ -732,6 +732,16 @@ CodeGenTypes::arrangeBuiltinFunctionDeclaration(CanQualType resultType,
                                  RequiredArgs::All);
 }
 
+const CGFunctionInfo &
+CodeGenTypes::arrangeSYCLKernelCallerDeclaration(QualType resultType,
+                                                 const FunctionArgList &args) {
+  auto argTypes = getArgTypesForDeclaration(Context, args);
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tahonermann wrote:

I don't think these uses violate the LLVM coding standard. The relevant guidelines are linked below.
- https://llvm.org/docs/CodingStandards.html#use-auto-type-deduction-to-make-code-more-readable
- https://llvm.org/docs/CodingStandards.html#beware-unnecessary-copies-with-auto

It looks to me like `getArgTypesForDeclaration()` follows NRVO, so copies should be avoided.

https://github.com/llvm/llvm-project/pull/133030