Merge pull request #3037 from mbechard/master

only use dead input elimination on vertex shaders

SPIRV/SpvTools.cpp

@@ -212,7 +212,8 @@ void SpirvToolsTransform(const glslang::TIntermediate& intermediate, std::vector
     optimizer.RegisterPass(spvtools::CreateInterpolateFixupPass());
     if (options->optimizeSize) {
         optimizer.RegisterPass(spvtools::CreateRedundancyEliminationPass());
-        optimizer.RegisterPass(spvtools::CreateEliminateDeadInputComponentsPass());
+        if (intermediate.getStage() == EShLanguage::EShLangVertex)
+            optimizer.RegisterPass(spvtools::CreateEliminateDeadInputComponentsPass());
     }
     optimizer.RegisterPass(spvtools::CreateAggressiveDCEPass());
     optimizer.RegisterPass(spvtools::CreateCFGCleanupPass());