http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58970

Bernd Edlinger <bernd.edlinger at hotmail dot de> changed:

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--- Comment #4 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Created attachment 31145
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31145&action=edit
For a possible patch.

This patch is assuming that a statement like "s->mode[-1].b = 0;"
is basically invoking undefined behaviour, so it should not matter
if we have correct bitregion_start/end values or just set them to zero
in this case.

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