qbe

commit 148f3e3e7efd143b7311f562b9c527a450b4a3b9
parent be1f7cbf23a11977bcf8f18dd7fa0c4fb52f336a
Author: Quentin Carbonneaux <quentin.carbonneaux@yale.edu>
Date:   Wed, 25 Nov 2015 10:44:59 -0500

add note about comparisons in spill

Diffstat:
M
lisc/spill.c
 | 
5
+++++

1 file changed, 5 insertions(+), 0 deletions(-)
diff --git a/lisc/spill.c b/lisc/spill.c
@@ -319,6 +319,11 @@ spill(Fn *fn)
 			tmp[p->to.val].wide = p->wide;
 		for (i=b->ins; i-b->ins < b->nins; i++)
 			if (rtype(i->to) == RTmp)
+				/* Note: this only works because
+				 * all OCmp operations were eliminated
+				 * indeed, the wide bit of those refer
+				 * to the size of the operands
+				 */
 				tmp[i->to.val].wide = i->wide;
 	}