fixed alignment issue resulting from confusion around the

meaning of out args.

go/test: passes 68% (231/339)

R=rsc
APPROVED=rsc
DELTA=13  (7 added, 0 deleted, 6 changed)
OCL=35072
CL=35080

src/cmd/5g/gsubr.c

@@ -351,7 +351,7 @@ nodarg(Type *t, int fp)
 			fatal("nodarg: bad struct");
 		if(first->width == BADWIDTH)
 			fatal("nodarg: offset not computed for %T", t);
-		n->xoffset = first->width + 4;
+		n->xoffset = first->width;
 		n->addable = 1;
 		goto fp;
 	}
@@ -364,7 +364,7 @@ nodarg(Type *t, int fp)
 	n->sym = t->sym;
 	if(t->width == BADWIDTH)
 		fatal("nodarg: offset not computed for %T", t);
-	n->xoffset = t->width + 4;
+	n->xoffset = t->width;
 	n->addable = 1;
 
 fp:
@@ -372,12 +372,13 @@ fp:
 	default:
 		fatal("nodarg %T %d", t, fp);
 
-	case 0:		// output arg
+	case 0:		// output arg for calling another function
 		n->op = OINDREG;
 		n->val.u.reg = REGSP;
+		n->xoffset += 4;
 		break;
 
-	case 1:		// input arg
+	case 1:		// input arg to current function
 		n->class = PPARAM;
 		break;
 	}

test/arm-pass.txt

@@ -8,6 +8,7 @@ bugs/bug193.go
 bugs/bug196.go
 bugs/bug198.go
 chan/perm.go
+cmp1.go
 cmp2.go
 cmp3.go
 cmp4.go
@@ -41,6 +42,7 @@ fixedbugs/bug022.go
 fixedbugs/bug023.go
 fixedbugs/bug024.go
 fixedbugs/bug026.go
+fixedbugs/bug028.go
 fixedbugs/bug030.go
 fixedbugs/bug031.go
 fixedbugs/bug035.go
@@ -161,6 +163,7 @@ fixedbugs/bug175.go
 fixedbugs/bug176.go
 fixedbugs/bug178.go
 fixedbugs/bug179.go
+fixedbugs/bug180.go
 fixedbugs/bug181.go
 fixedbugs/bug182.go
 fixedbugs/bug183.go
@@ -173,6 +176,7 @@ fixedbugs/bug192.go
 fixedbugs/bug194.go
 fixedbugs/bug195.go
 fixedbugs/bug197.go
+fixedbugs/bug199.go
 fixedbugs/bug200.go
 fixedbugs/bug201.go
 fixedbugs/bug202.go
@@ -209,6 +213,7 @@ ken/mfunc.go
 ken/robfor.go
 ken/robif.go
 ken/simpbool.go
+ken/simpfun.go
 ken/simpprint.go
 ken/simpswitch.go
 ken/simpvar.go
@@ -220,6 +225,7 @@ parentype.go
 printbig.go
 rename1.go
 sieve.go
+simassign.go
 switch.go
 test0.go
 varinit.go