Hello,
looking though the patterns on the branch (not specifically the ones
attached here), I am surprised to see so few calls to has_single_use. In
RTL-land, we don't even valueize if there are several uses, so the
question doesn't occur. In generic, we assume everything is single use
(CSE could later disagree, but that's the user's fault for writing his
code that way). In tree-ssa-forwprop.c, helpers like get_prop_source_stmt
do test for single use. Since has_single_use is a bit painful to use in
.pd files (separate test for generic and constants), it might deserve
another helper function, or a special syntax.
--
Marc Glisse
