From: Ken Thompson <ken@golang.org>
Date: Tue, 9 Dec 2008 04:50:17 +0000 (-0800)
Subject: conversion to/from
X-Git-Tag: weekly.2009-11-06~2552
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=bf6164719a20b5003ed6a4f49fb2d796801240af;p=gostls13.git

conversion to/from
any pointer or uintptr
and unsafe.pointer

R=r
OCL=20795
CL=20795
---

diff --git a/src/cmd/gc/walk.c b/src/cmd/gc/walk.c
index 067aed49d4..37a690302a 100644
--- a/src/cmd/gc/walk.c
+++ b/src/cmd/gc/walk.c
@@ -622,6 +622,22 @@ loop:
 			goto ret;
 		}
 
+		// convert to unsafe.pointer
+		if(isptrto(n->type, TANY)) {
+			if(isptr[l->type->etype])
+				goto ret;
+			if(l->type->etype == TUINTPTR)
+				goto ret;
+		}
+
+		// convert from unsafe.pointer
+		if(isptrto(l->type, TANY)) {
+			if(isptr[n->type->etype])
+				goto ret;
+			if(n->type->etype == TUINTPTR)
+				goto ret;
+		}
+
 		if(l->type != T)
 			yyerror("cannot convert %T to %T", l->type, t);
 		goto ret;