qbe

commit 1477dffe32ae769c15ee49e77c5f0856bd0f56ea
parent df358ad6d21502568df9f937788f3fab6a81e047
Author: Quentin Carbonneaux <quentin.carbonneaux@yale.edu>
Date:   Tue,  4 Aug 2015 19:39:01 -0400

use cmp $0, it works with spill slots

Diffstat:
M
lisc/emit.c
 | 
6
+++---
M
lisc/spill.c
 | 
2
++

2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/lisc/emit.c b/lisc/emit.c
@@ -168,14 +168,14 @@ emitfn(Fn *fn, FILE *f)
 			break;
 		case JJez:
 			if (b->s1 == b->link) {
-				js = "jnz";
+				js = "jne";
 				s = b->s2;
 			} else if (b->s2 == b->link) {
-				js = "jz";
+				js = "je";
 				s = b->s1;
 			} else
 				diag("emit: unhandled jump (1)");
-			eop("test", b->jmp.arg, b->jmp.arg, fn, f);
+			eop("cmp $0,", b->jmp.arg, R, fn, f);
 			fprintf(f, "\t%s .L%s\n", js, s->name);
 			break;
 		default:
diff --git a/lisc/spill.c b/lisc/spill.c
@@ -334,6 +334,7 @@ spill(Fn *fn)
 		assert(bcnt(&v) <= nreg);
 
 		/* 2. process the block instructions */
+#if 0
 		if (rtype(b->jmp.arg) == RTmp) {
 			j = b->jmp.arg.val;
 			if (!BGET(v, j) && l==nreg) {
@@ -342,6 +343,7 @@ spill(Fn *fn)
 			}
 			BSET(v, j);
 		}
+#endif
 		curi = &insb[NIns];
 		for (i=&b->ins[b->nins]; i!=b->ins;) {
 			assert(bcnt(&v) <= nreg);