> That only covers call-preserved registers. Testing call-clobbered > registers is harder (but normally unwind information won't be generated > for them, so they matter less); for iWMMXt I tried testing using > -fcall-saved-wr0 -fcall-saved-wr1 ... but found that > CONDITIONAL_REGISTER_USAGE overrides -fcall-saved-* for the wr registers > and there is no prologue/epilogue support for saving/restoring wcgr > registers. You may need to temporarily modify GCC to save and restore > such registers in order to test the unwinding for them.
Or write testcases by hand in assembly. Paul
