Baseline: slight emitter optimizations
Baseline: slight emitter optimizations

Together with the previous patch, this makes compilation about 10% faster.

mbebenita/shumway,mbebenita/shumway,mozilla/shumway,mozilla/shumway,yurydelendik/shumway,tschneidereit/shumway,tschneidereit/shumway,mbebenita/shumway,tschneidereit/shumway,mbebenita/shumway,yurydelendik/shumway,yurydelendik/shumway,yurydelendik/shumway,tschneidereit/shumway,mozilla/shumway,tschneidereit/shumway,yurydelendik/shumway,mozilla/shumway,tschneidereit/shumway,mbebenita/shumway,mbebenita/shumway,mozilla/shumway,mbebenita/shumway,mozilla/shumway,yurydelendik/shumway,tschneidereit/shumway,yurydelendik/shumway,yurydelendik/shumway,tschneidereit/shumway,mbebenita/shumway,mozilla/shumway,mozilla/shumway