heavy modification of call handling

The IR generated by calls was very bulky because two
instructions were used for marking the live range of
a clobber.

This patch attempts to store the information of what
registers are use/def/clobber in the call instruction
itself, this leads to more compact code (even more
when we'll have SSE registers).  However, I find that
the amount of extra code needed is not really
easonable.  Fortunately it is not too invasive, thus
if the complexity creeps in, it should be easy to
revert.

1 files changed, 5 insertions, 2 deletions

diff --git a/lisc/parse.c b/lisc/parse.c
index 957fae1..29f5653 100644
--- a/lisc/parse.c
+++ b/lisc/parse.c
@@ -779,8 +779,11 @@ printref(Ref r, Fn *fn, FILE *f)
 	case RSlot:
 		fprintf(f, "S%d", r.val);
 		break;
-	case RTyp:
-		fprintf(f, ":%s", typ[r.val].name);
+	case RAlt:
+		if (r.val & RCallm)
+			fprintf(f, "%x", r.val & (RCallm-1));
+		else
+			fprintf(f, ":%s", typ[r.val].name);
 		break;
 	}
 }