[project @ 2004-08-09 13:19:29 by simonmar]

[project @ 2004-08-09 13:19:29 by simonmar]
Allow case-of-unsafe-ccall to compile to straight-line code, like it
used to.  This has already been fixed on the backend-hacking-branch,
but I'm doing it here so that it can be merged into the STABLE branch,
where it will help to work around a bug.

The bug is in CgExpr.lhs:primRetUnboxedTuple, which picks temporaries
to assign the result of a ccall to.  The Cg monad doesn't have a uniq
supply (in the HEAD), so we always pick the same temporaries.  This
leads to clashes in complex function with multiple ccalls.  Again,
this is already fixed in the backend-hacking-branch.  I don't see an
easy fix for this bug.

The compilation of case-of-unsafe-ccall doesn't suffer from this
problem, and it will help work around some cases of the bug, so I'm
going to merge this onto the STABLE branch after some testing.