[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 {
+static ResourceClass RangeToResourceClass(uint32_t RangeType) {
+  using namespace dxbc;
+  switch (static_cast<DescriptorRangeType>(RangeType)) {
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bogner wrote:

It's weird for this function to take a `uint32_t`, and this function isn't following llvm naming conventions. We can solve both of these by creating a strongly typed conversion function that can be overloaded, like `static ResourceClass toResourceClass(dxbc::DescriptorRangeType)`.

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