From: Rémy Oudompheng <oudomphe@phare.normalesup.org>
Date: Fri, 7 Mar 2014 19:28:18 +0000 (+0100)
Subject: cmd/gc: enforce register-width alignment for stack sizes.
X-Git-Tag: go1.3beta1~422
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=3d5e219e020115e98762821ac688e77b1b50787d;p=gostls13.git

cmd/gc: enforce register-width alignment for stack sizes.

This fixes the following amd64p32 issue:
    pkg/time/format.go:724: internal compiler error: twobitwalktype1: invalid initial alignment, Time

caused by the pointer zone ending on a 32-bit-aligned boundary.

LGTM=rsc
R=rsc, dave
CC=golang-codereviews
https://golang.org/cl/72270046
---

diff --git a/src/cmd/gc/pgen.c b/src/cmd/gc/pgen.c
index 37d603cb0f..3e1bff1794 100644
--- a/src/cmd/gc/pgen.c
+++ b/src/cmd/gc/pgen.c
@@ -429,8 +429,8 @@ allocauto(Prog* ptxt)
 		n->stkdelta = -stksize - n->xoffset;
 	}
 	stksize = rnd(stksize, widthreg);
-	stkptrsize = rnd(stkptrsize, widthptr);
-	stkzerosize = rnd(stkzerosize, widthptr);
+	stkptrsize = rnd(stkptrsize, widthreg);
+	stkzerosize = rnd(stkzerosize, widthreg);
 
 	fixautoused(ptxt);