[llvm] [clang] [HLSL][SPIR-V] Add Vulkan to target triple (PR #76749)

[Nathan Gauër via llvm-commits]

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@@ -1328,6 +1331,31 @@ VersionTuple Triple::getDriverKitVersion() const {
   }
 }
 
+VersionTuple Triple::getVulkanVersion() const {
+  if (getArch() != spirv || getOS() != Vulkan)
+    llvm_unreachable("invalid Vulkan SPIR-V triple");
+
+  VersionTuple VulkanVersion = getOSVersion();
+  SubArchType SpirvVersion = getSubArch();
+
+  llvm::DenseMap<VersionTuple, SubArchType> ValidVersionMap = {
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Keenuts wrote:

Shall we have a way to differentiate unsupported vulkan version, and unsupported spirv/vulkan mix?
Or have a longer message saying we only support v1.2+spv1.5 and v1.3+spv1.6?)

https://github.com/llvm/llvm-project/pull/76749