diff --git a/layout/base/FrameLayerBuilder.cpp b/layout/base/FrameLayerBuilder.cpp

index e3ab866..c9486fe 100644

--- a/layout/base/FrameLayerBuilder.cpp

+++ b/layout/base/FrameLayerBuilder.cpp

@@ -914,6 +914,9 @@ ContainerState::PopThebesLayerData()

// a rectangle, it must therefore contain the visible region's GetBounds.

// Note that the visible region is already clipped appropriately.

nsIntRect visibleRect = data->mVisibleRegion.GetBounds();

+#if defined(__SUNPRO_CC) && defined(__sparc)

+ asm ("nop"); // compiler optimiztion bug

+#endif

colorLayer->SetClipRect(&visibleRect);

layer = colorLayer;