From: Russ Cox <rsc@golang.org>
Date: Tue, 19 Aug 2014 02:24:15 +0000 (-0400)
Subject: [dev.power64] liblink: recognize add instruction as adjusting SP
X-Git-Tag: go1.5beta1~2684^2~25^2~19
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=04d5796b2988a20175b8cb03eb7080cf4cca2179;p=gostls13.git

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

LGTM=minux
R=minux
CC=golang-codereviews
https://golang.org/cl/128360043
---

diff --git a/src/liblink/list9.c b/src/liblink/list9.c
index 9700a16849..9e205b7a9e 100644
--- 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
index 28793676cc..d0c14dfb57 100644
--- 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;
 		}
 	}