code review 1848056: gc: index bounds tests and fixes

src/cmd/gc/const.c

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 #include        "go.h"
 #define TUP(x,y)        (((x)<<16)|(y))
 
 static  Val     tocplx(Val);
 static  Val     toflt(Val);
 static  Val     tostr(Val);
@@ skipping 1074 matching lines @@
         switch(simtype[n->type->etype]) {
         case TINT8:
         case TUINT8:
         case TINT16:
         case TUINT16:
         case TINT32:
         case TUINT32:
         case TBOOL:
         case TPTR32:
                 return 1;
+        case TINT64:
+        case TUINT64:
+                if(mpcmpfixfix(n->val.u.xval, minintval[TINT32]) < 0
+                || mpcmpfixfix(n->val.u.xval, maxintval[TINT32]) > 0)
+                        break;
+                return 1;
         }
         return 0;
 }
 
 long
 nonnegconst(Node *n)
 {
         if(n->op == OLITERAL && n->type != T)
         switch(simtype[n->type->etype]) {
         case TINT8:
@@ skipping 161 matching lines @@
         mpmulfltflt(&ad, &rv->imag);            // ad
 
         mpmovefltflt(&v->real, &ac);
         mpaddfltflt(&v->real, &bd);             // ac+bd
         mpdivfltflt(&v->real, &cc_plus_dd);     // (ac+bd)/(cc+dd)
 
         mpmovefltflt(&v->imag, &bc);
         mpsubfltflt(&v->imag, &ad);             // bc-ad
         mpdivfltflt(&v->imag, &cc_plus_dd);     // (bc+ad)/(cc+dd)
 }