[clang] [clang-tools-extra] [llvm] [clang] Simplify device kernel attributes (PR #137882)

[Nick Sarnie via cfe-commits]

================
@@ -80,12 +80,19 @@ unsigned 
CodeGenTypes::ClangCallConvToLLVMCallConv(CallingConv CC) {
     return llvm::CallingConv::AArch64_VectorCall;
   case CC_AArch64SVEPCS:
     return llvm::CallingConv::AArch64_SVE_VectorCall;
-  case CC_AMDGPUKernelCall:
-    return llvm::CallingConv::AMDGPU_KERNEL;
   case CC_SpirFunction:
     return llvm::CallingConv::SPIR_FUNC;
-  case CC_OpenCLKernel:
-    return CGM.getTargetCodeGenInfo().getOpenCLKernelCallingConv();
+  case CC_DeviceKernel: {
+    if (CGM.getLangOpts().OpenCL)
+      return CGM.getTargetCodeGenInfo().getOpenCLKernelCallingConv();
+    if (CGM.getTriple().isSPIROrSPIRV())
+      return llvm::CallingConv::SPIR_KERNEL;
+    if (CGM.getTriple().isAMDGPU())
+      return llvm::CallingConv::AMDGPU_KERNEL;
+    if (CGM.getTriple().isNVPTX())
+      return llvm::CallingConv::PTX_Kernel;
+    llvm_unreachable("Unknown kernel calling convention");
+  }
----------------
sarnex wrote:

https://github.com/llvm/llvm-project/pull/144728

https://github.com/llvm/llvm-project/pull/137882
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