Gert Wollny authored Aug 12, 2020 and Erik Faye-Lund committed Oct 26, 2020

The values are stored as-in in the ssa value pool, unless the according slot
already contains type information (e.g. because the valus is used in a PHI
instruction). In this latter case the value is stored with the predefined
type. When a value is loaded the type is checked against the expectation
and a cast is emitted if necessary.

For pointers an extra function is used that (for now) returns
the plain type.

v2: use get_src_ptr also in load function

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>