qbe

commit 05f120431dd840009c37f96209dae75ab6cd6327
parent a9dc36e0ebd151ca96bca1a7ffb5ecac49ee6bcf
Author: Quentin Carbonneaux <quentin.carbonneaux@yale.edu>
Date:   Sun, 25 Oct 2015 21:17:24 -0400

this test optimization is sometimes incorrect

Diffstat:
M
lisc/emit.c
 | 
5
-----

1 file changed, 0 insertions(+), 5 deletions(-)
diff --git a/lisc/emit.c b/lisc/emit.c
@@ -326,11 +326,6 @@ eins(Ins i, Fn *fn, FILE *f)
 		emitf(fn, f, "idiv%w %R", i.wide, i.arg[0]);
 		break;
 	case OXCmp:
-		if (isreg(i.arg[1]) && req(i.arg[0], CON_Z)) {
-			emitf(fn, f, "test%w %R, %R",
-				i.wide, i.arg[1], i.arg[1]);
-			break;
-		}
 		emitf(fn, f, "cmp%w %R, %R", i.wide, i.arg[0], i.arg[1]);
 		break;
 	case OXTest: