[clang] [llvm] Stop using spir_kernel calling convention on non-SPIR targets. (PR #191090)

[Nick Sarnie via cfe-commits]

================
@@ -866,7 +866,8 @@ const CGFunctionInfo &CodeGenTypes::arrangeLLVMFunctionInfo(
   assert(inserted && "Recursively being processed?");
 
   // Compute ABI information.
-  if (CC == llvm::CallingConv::SPIR_KERNEL) {
+  if (info.getCC() == CC_DeviceKernel &&
+      (CC == llvm::CallingConv::SPIR_KERNEL || CC == llvm::CallingConv::C)) {
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sarnex wrote:

I wonder if this would work,

```suggestion
      (CC == llvm::CallingConv::SPIR_KERNEL || 
      getContext().getLangOpts().OpenCL)) {
```

I feel like if checking the generic C callingconv is a bit risky, my understanding is we only want to call `computeSPIRKernelABIInfo` for non-SPIR kernels if we are generating OpenCL



https://github.com/llvm/llvm-project/pull/191090