[clang] [CIR][X86] Add support for alignd builtins (PR #171621)

[Andy Kaylor via cfe-commits]

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@@ -1182,6 +1179,25 @@ mlir::Value CIRGenFunction::emitX86BuiltinExpr(unsigned builtinID,
                  std::string("unimplemented X86 builtin call: ") +
                      getContext().BuiltinInfo.getName(builtinID));
     return {};
+  case X86::BI__builtin_ia32_alignd128:
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andykaylor wrote:

Please do not change the order of the builtins in the switch. We've intentionally kept the same ordering as classic codegen to make it easier to navigate the code. Instead, duplicate the `errorNYI` handling above the builtins you are handling to prevent a fallthrough.

https://github.com/llvm/llvm-project/pull/171621