ispc/ispc — pull request #551 by mmp (2013-07-22 23:26:17+00:00)
Title: Improvements to constant folding.

We can now do constant folding with all basic datatypes (the previous
implementation handled int32 well, but had limited, if any, coverage
for other datatypes.)

Reduced a bit of repeated code in the constant folding implementation
through template helper functions.