SL-16166 Optimization pass on render pipe inner loops

indra/llrender/llglslshader.cpp

indra/llrender/llgltexture.h

indra/llrender/llrender.cpp

indra/llrender/llrender.h

indra/llrender/lltexture.h

indra/llrender/llvertexbuffer.cpp

indra/llrender/llvertexbuffer.h

indra/newview/lldrawable.cpp

indra/newview/lldrawpool.cpp

indra/newview/lldrawpoolalpha.cpp

indra/newview/lldrawpoolalpha.h

indra/newview/lldrawpoolavatar.cpp

indra/newview/lldrawpoolavatar.h

indra/newview/lldrawpoolbump.cpp

indra/newview/lldrawpoolbump.h

indra/newview/lldrawpoolmaterials.cpp

indra/newview/lldrawpoolmaterials.h

indra/newview/lldrawpoolsimple.cpp

indra/newview/lldrawpoolsimple.h

indra/newview/lldrawpooltree.cpp