http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51885
--- Comment #4 from Laurent MAURIN <laurentlouis.maurin at wanadoo dot fr> 2012-01-20 19:18:13 UTC --- i am quite sure there is something strange : reinterpret_cast is used to cast a float pointer to a uint32_t pointer these two types have the same size (4 bytes) therefore, the swap function (following the reinterpret_cast) should work properly ... maybe the -O2 and -O3 compiler optimisation flags have an influence on the binary code generated for the swap function in this example
