code review 2609041: 6l: correct logic for morestack choice

src/cmd/6l/pass.c

 // Inferno utils/6l/pass.c
 // http://code.google.com/p/inferno-os/source/browse/utils/6l/pass.c
 //
 //      Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
 //      Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
 //      Portions Copyright © 1997-1999 Vita Nuova Limited
 //      Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
 //      Portions Copyright © 2004,2006 Bruce Ellis
 //      Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
 //      Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
@@ skipping 451 matching lines @@
                                 // common
                                 p = appendp(p);
                                 p->as = AJHI;
                                 p->to.type = D_BRANCH;
                                 p->to.offset = 4;
                                 q = p;
                         }
 
                         /* 160 comes from 3 calls (3*8) 4 safes (4*8) and 104 guard */
                         moreconst1 = 0;
-                        if(autoffset+160 > 4096)
+                        if(autoffset+160+textarg > 4096)
                                 moreconst1 = (autoffset+160) & ~7LL;
                         moreconst2 = textarg;
 
                         // 4 varieties varieties (const1==0 cross const2==0)
                         // and 6 subvarieties of (const1==0 and const2!=0)
                         p = appendp(p);
                         if(moreconst1 == 0 && moreconst2 == 0) {
                                 p->as = ACALL;
                                 p->to.type = D_BRANCH;
                                 p->pcond = pmorestack[0];
@@ skipping 204 matching lines @@
 undef(void)
 {
         int i;
         Sym *s;
 
         for(i=0; i<NHASH; i++)
         for(s = hash[i]; s != S; s = s->hash)
                 if(s->type == SXREF)
                         diag("%s: not defined", s->name);
 }