Add pseudo death-note tracking.

Now that we have full pseudo usage lists, we can also add
deathnotes to pseudos in the instruction stream.

NOTE! We add the deathnote to _before_ the last instruction
that uses that pseudo. That looks a bit strange, but it's
actually what you want: when we traverse the instuctions, we
want to know that the inputs are dead.

1 files changed, 1 insertions, 0 deletions

diff --git a/linearize.h b/linearize.h
index f9e5eb6..506139a 100644
--- a/linearize.h
+++ b/linearize.h
@@ -158,6 +158,7 @@ enum opcode {
 	OP_SNOP,
 	OP_LNOP,
 	OP_NOP,
+	OP_DEATHNOTE,
 
 	/* Sparse tagging (line numbers, context, whatever) */
 	OP_CONTEXT,