Simplify trivial casts (and handle pointers specially).

This does trivial simplification of casting to the same
typesize. HOWEVER. We split casts up into whether they
cast to a dereferencable pointer type or not, and we don't
simplify pointer casts. This should mean that if we
ever want to do type-based alias analysis, we can still
avoid casted accesses.

(If we do type-based alias analysis, we'll also need to make
a union access do a cast. Which we probably should do anyway).

1 files changed, 1 insertions, 0 deletions

diff --git a/linearize.h b/linearize.h
index 0db5a43..c1ba1b8 100644
--- a/linearize.h
+++ b/linearize.h
@@ -151,6 +151,7 @@ enum opcode {
 	OP_PHI,
 	OP_PHISOURCE,
 	OP_CAST,
+	OP_PTRCAST,
 	OP_CALL,
 	OP_VANEXT,
 	OP_VAARG,