This also fixes the return value of snprintf variants in case of full
buffer: The number of bytes that would have been written with an
infinite buffer is returned.

start with some unittests for raw bitsets.

This fixes opt/ifconv3.c.

This fixes opt/ifconv2.c and opt/ifconv4.c.

Due to the bug, the opcode name of phi nodes are never printed in the
first dump of the backend (...-begin.vcg).

Andreas Fried authored Aug 02, 2013 and yb9976 committed Sep 04, 2013

This covers two cases (assuming no aliasing operations in between the nodes):

Firstly, a Store node whose destination lies completely within the CopyB's
destination can be deleted.

Secondly, if a previous CopyB (A) writes to the source of CopyB to be optimized
(B), we can use A's source pointer for further optimizations. If A's source is
constant, we can change B to read from A's source.  Cases with offsets are not
handled.

Andreas Fried authored Aug 02, 2013 and yb9976 committed Sep 04, 2013

When following the Memory chain for a Store, a CopyB node may be skipped, if
both its destination and source do not alias with the Store's destination.

This is a major Makefile refactoring:
differentiate between:
- source files in $(srcdir)
- generated files in $(top_builddir)/gen
- object files in $(top_builddir)/$(variant)/ aka $(builddir)
- documentation in $(top_builddir)/doc