Yes. wp512_process_buffer() was using 3k of stack if compiled with -O2. The wp512.c I appended (sans table at top) is instrumented to show it. Use "make crypto/wp512.s".
See http://gcc.gnu.org/bugs.html for info on reporting gcc bugs.
We need a testcase that we can use to reproduce the problem. The code sample you gave can't be compiled, because it relies on types that aren't defined in the code sample.
You also left out other important info such as what target you are compiling for.
I'm guessing this is some linux kernel code, but it would still be helpful to have a self-contained testcase to make it easier for us to look at this.
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Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com
