Somewhere there's this great CMSIS-DSP ticket: creator complains that CMSIS uses volatile loads/stores for GCC. Creator remove volatile, GCC reorders instructio

Somewhere there's this great CMSIS-DSP ticket: creator complains that CMSIS uses volatile loads/stores for GCC. Creator remove volatile, GCC reorders instructions to require larger number of in-flight registers, spills everything to the stack and tanks the FFT speed.