[lld] [mlir] [llvm] [clang-tools-extra] [flang] [compiler-rt] [libc] [libcxx] [lldb] [clang] [MLIR] Enable GPU Dialect to SYCL runtime integration (PR #71430)

[Fabian Mora via cfe-commits]

================
@@ -61,6 +63,7 @@ registerAllGPUToLLVMIRTranslations(DialectRegistry &registry) 
{
   registerLLVMDialectTranslation(registry);
   registerNVVMDialectTranslation(registry);
   registerROCDLDialectTranslation(registry);
+  registerSPIRVDialectTranslation(registry);
----------------
fabianmcg wrote:

The call to `registry.insert<spirv::SPIRVDialect>();` is needed so that 
`mlir-translate` can parse the code containing the SPIR-V target attribute, 
nothing more; there's no translation happening from SPIR-V to LLVM. If the call 
is not added, then `mlir-translate` throws an error because `SPIR-V` never gets 
registered.

The question is, should an empty translation to LLVM should be added to mirror 
all other * to LLVM translation code structure, or is inlining the call ok? I 
definitely prefer the second option -one less target.

https://github.com/llvm/llvm-project/pull/71430
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