[clang] [HLSL] set alwaysinline on HLSL functions (PR #106588)

[Greg Roth via cfe-commits]

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@@ -290,8 +290,6 @@ struct BuiltinTypeDeclBuilder {
                                              SourceLocation()));
     MethodDecl->setLexicalDeclContext(Record);
     MethodDecl->setAccess(AccessSpecifier::AS_public);
-    MethodDecl->addAttr(AlwaysInlineAttr::CreateImplicit(
-        AST, SourceRange(), AlwaysInlineAttr::CXX11_clang_always_inline));
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pow2clk wrote:

It wasn't necessary so much as redundant for the compilations I tested and actually gets applied to the LLVM function representation after that set by `setHLSLFunctionAttributes`.

How would I test a relevant separate compilation case? 

https://github.com/llvm/llvm-project/pull/106588