[llvm] [DirectX] Add Range Overlap validation (PR #152229)

[Justin Bogner via llvm-commits]

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@@ -24,6 +25,35 @@ using namespace llvm;
 using namespace llvm::dxil;
 
 namespace {
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bogner wrote:

This is already there, but `static` functions don't need to be in an anonymous namespace (only classes and structs do). I guess we could remove this particular anonymous namespace completely.

https://github.com/llvm/llvm-project/pull/152229