================
@@ -6174,6 +6174,19 @@ void 
CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD,
   CodeGenFunction(*this).GenerateCode(GD, Fn, FI);
 
   setNonAliasAttributes(GD, Fn);
+
+  bool ShouldAddOptNone = !CodeGenOpts.DisableO0ImplyOptNone &&
+                          (CodeGenOpts.OptimizationLevel == 0) &&
+                          !D->hasAttr<MinSizeAttr>();
+
+  if (D->hasAttr<OpenCLKernelAttr>())
+    if (GD.getKernelReferenceKind() == KernelReferenceKind::Stub &&
+        !D->hasAttr<NoInlineAttr>() &&
+        !Fn->hasFnAttribute(llvm::Attribute::NoInline) &&
+        !D->hasAttr<OptimizeNoneAttr>() &&
+        !Fn->hasFnAttribute(llvm::Attribute::OptimizeNone) && 
!ShouldAddOptNone)
+      Fn->addFnAttr(llvm::Attribute::AlwaysInline);
----------------
arsenm wrote:

There are fewer test changes than I expect for this. Do we have tests with 
explicit optnone or noinline placed on kernels? 

https://github.com/llvm/llvm-project/pull/137769
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