[dev.power64] liblink: recognize add instruction as adjusting SP

LGTM=minux R=minux CC=golang-codereviews https://golang.org/cl/128360043
no-glue · Aug 19, 2014 · 04d5796 · 04d5796
1 parent d0be55a
commit 04d5796
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diff --git a/src/liblink/list9.c b/src/liblink/list9.c
@@ -125,6 +125,8 @@ Pconv(Fmt *fp)
 				s += sprint(s, ",%D", &p->from3);
 			sprint(s, ",%D", &p->to);
 		}
+		if(p->spadj != 0)
+			return fmtprint(fp, "%s # spadj=%d", str, p->spadj);
 	}
 	return fmtstrcpy(fp, str);
 }

diff --git a/src/liblink/obj9.c b/src/liblink/obj9.c
@@ -617,6 +617,10 @@ addstacksplit(Link *ctxt, LSym *cursym)
 			q->link = q1;
 			break;
 
+		case AADD:
+			if(p->to.type == D_REG && p->to.reg == REGSP && p->from.type == D_CONST)
+				p->spadj = -p->from.offset;
+			break;
 		}
 	}