[HLSL] Mark exported functions with "hlsl.export" attribute (#102275)

Marks exported functions with `"hlsl.export"` attribute. This
information will be later used by DXILFinalizeLinkage pass (coming soon)
to determine which functions should have internal linkage in the final
DXIL code.

Related to #llvm/llvm-project#92071

1 files changed, 7 insertions, 3 deletions

diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp
index 7adc5a4..eff8c9f 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -1228,9 +1228,13 @@ void CodeGenFunction::StartFunction(GlobalDecl GD, QualType RetTy,
   if (getLangOpts().OpenMP && CurCodeDecl)
     CGM.getOpenMPRuntime().emitFunctionProlog(*this, CurCodeDecl);
 
-  // Handle emitting HLSL entry functions.
-  if (D && D->hasAttr<HLSLShaderAttr>())
-    CGM.getHLSLRuntime().emitEntryFunction(FD, Fn);
+  if (FD && getLangOpts().HLSL) {
+    // Handle emitting HLSL entry functions.
+    if (FD->hasAttr<HLSLShaderAttr>()) {
+      CGM.getHLSLRuntime().emitEntryFunction(FD, Fn);
+    }
+    CGM.getHLSLRuntime().setHLSLFunctionAttributes(FD, Fn);
+  }
 
   EmitFunctionProlog(*CurFnInfo, CurFn, Args);