[clang] [llvm] [HLSL][SPIR-V] Implement vk::ext_builtin_input attribute (PR #138530)

[Steven Perron via cfe-commits]

Nathan =?utf-8?q?Gauër?= <brioche at google.com>,
Nathan =?utf-8?q?Gauër?= <brioche at google.com>,
Nathan =?utf-8?q?Gauër?= <brioche at google.com>,
Nathan =?utf-8?q?Gauër?= <brioche at google.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/138530 at github.com>


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@@ -5759,9 +5761,18 @@ void CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D,
       getCUDARuntime().internalizeDeviceSideVar(D, Linkage);
     }
     getCUDARuntime().handleVarRegistration(D, *GV);
+  } else if (LangOpts.HLSL &&
+             GetGlobalVarAddressSpace(D) == LangAS::hlsl_input) {
+    // HLSL Input variables are considered to be set by the driver/pipeline, but
+    // only visible to a single thread/wave.
+    GV->setExternallyInitialized(true);
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s-perron wrote:

Could this move into `handleGlobalVarDefinition`?

https://github.com/llvm/llvm-project/pull/138530