[clang] [Clang] diagnosing missing Vulkan environment when using SPIR-V triple (PR #190840)

[Tony Guillot via cfe-commits]

================
@@ -112,6 +112,18 @@ void CompilerInstance::setTarget(TargetInfo *Value) { Target = Value; }
 void CompilerInstance::setAuxTarget(TargetInfo *Value) { AuxTarget = Value; }
 
 bool CompilerInstance::createTarget() {
+
+  // SPIR-V targeting requires a fully specified Vulkan environment.
----------------
to268 wrote:

This code block should at least be moved after   `setTarget(TargetInfo::CreateTargetInfo(getDiagnostics(),`.

https://github.com/llvm/llvm-project/pull/190840