From: Russ Cox <rsc@golang.org>
Date: Sun, 8 Feb 2009 19:19:45 +0000 (-0800)
Subject: add error to catch 6g alignment bug.
X-Git-Tag: weekly.2009-11-06~2204
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=a81870badf2b625dd82c705796d2e897b53749bc;p=gostls13.git

add error to catch 6g alignment bug.
the fix appears to be to align the
out struct on an 8 boundary, but that
is a bit involved.

R=ken
OCL=24657
CL=24657
---

diff --git a/src/cmd/gc/walk.c b/src/cmd/gc/walk.c
index 87e4fae475..bd2fb74f74 100644
--- a/src/cmd/gc/walk.c
+++ b/src/cmd/gc/walk.c
@@ -1906,6 +1906,11 @@ ascompatte(int op, Type **nl, Node **nr, int fp)
 	&& structnext(&peekl) != T
 	&& listnext(&peekr) == N
 	&& eqtypenoname(r->type, *nl)) {
+		// clumsy check for differently aligned structs.
+		// need to handle eventually, but this keeps us
+		// from inserting bugs
+		if(r->type->width != (*nl)->width)
+			yyerror("misaligned multiple return (6g's fault)");
 		a = nodarg(*nl, fp);
 		a->type = r->type;
 		return convas(nod(OAS, a, r));