HLSL: Fix #1064: Don't include empty structures on OpEntryPoint
diff --git a/SPIRV/GlslangToSpv.cpp b/SPIRV/GlslangToSpv.cpp
index 40f7508..9dec286 100755
--- a/SPIRV/GlslangToSpv.cpp
+++ b/SPIRV/GlslangToSpv.cpp
@@ -1081,8 +1081,10 @@
     // Include all "static use" and "linkage only" interface variables on the OpEntryPoint instruction
     if (builder.isPointer(id)) {
         spv::StorageClass sc = builder.getStorageClass(id);
-        if (sc == spv::StorageClassInput || sc == spv::StorageClassOutput)
-            iOSet.insert(id);
+        if (sc == spv::StorageClassInput || sc == spv::StorageClassOutput) {
+            if (!symbol->getType().isStruct() || symbol->getType().getStruct()->size() > 0)
+                iOSet.insert(id);
+        }
     }
 
     // Only process non-linkage-only nodes for generating actual static uses
diff --git a/Test/baseResults/hlsl.emptystructreturn.frag.out b/Test/baseResults/hlsl.emptystructreturn.frag.out
index 5440045..5913180 100644
--- a/Test/baseResults/hlsl.emptystructreturn.frag.out
+++ b/Test/baseResults/hlsl.emptystructreturn.frag.out
@@ -56,7 +56,7 @@
                               Capability Shader
                1:             ExtInstImport  "GLSL.std.450"
                               MemoryModel Logical GLSL450
-                              EntryPoint Fragment 4  "main" 20 23
+                              EntryPoint Fragment 4  "main"
                               ExecutionMode 4 OriginUpperLeft
                               Source HLSL 500
                               Name 4  "main"
diff --git a/Test/baseResults/hlsl.emptystructreturn.vert.out b/Test/baseResults/hlsl.emptystructreturn.vert.out
index c8cea5d..f93bb63 100644
--- a/Test/baseResults/hlsl.emptystructreturn.vert.out
+++ b/Test/baseResults/hlsl.emptystructreturn.vert.out
@@ -54,7 +54,7 @@
                               Capability Shader
                1:             ExtInstImport  "GLSL.std.450"
                               MemoryModel Logical GLSL450
-                              EntryPoint Vertex 4  "main" 20 23
+                              EntryPoint Vertex 4  "main"
                               Source HLSL 500
                               Name 4  "main"
                               Name 6  "vs_in"