Keep the state of registers in an array and flush it later ReducedStack
authorJaroslav Tulach <jaroslav.tulach@apidesign.org>
Sat, 15 Feb 2014 17:23:24 +0100
branchReducedStack
changeset 1455398911a8f401
parent 1454 ca83b2adebb5
child 1456 6212993ac686
Keep the state of registers in an array and flush it later
rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java
rt/vm/src/main/java/org/apidesign/vm4brwsr/StackMapper.java
rt/vm/src/main/java/org/apidesign/vm4brwsr/StringArray.java
     1.1 --- a/rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Sat Feb 15 15:47:28 2014 +0100
     1.2 +++ b/rt/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Sat Feb 15 17:23:24 2014 +0100
     1.3 @@ -471,7 +471,7 @@
     1.4                      final int indx = wide ? readUShort(byteCodes, i++)
     1.5                                            : readUByte(byteCodes, i);
     1.6                      wide = false;
     1.7 -                    emit(out, "var @1 = @2;",
     1.8 +                    emit(smapper, out, "var @1 = @2;",
     1.9                           lmapper.setI(indx), smapper.popI());
    1.10                      break;
    1.11                  }
    1.12 @@ -480,7 +480,7 @@
    1.13                      final int indx = wide ? readUShort(byteCodes, i++)
    1.14                                            : readUByte(byteCodes, i);
    1.15                      wide = false;
    1.16 -                    emit(out, "var @1 = @2;",
    1.17 +                    emit(smapper, out, "var @1 = @2;",
    1.18                           lmapper.setL(indx), smapper.popL());
    1.19                      break;
    1.20                  }
    1.21 @@ -489,7 +489,7 @@
    1.22                      final int indx = wide ? readUShort(byteCodes, i++)
    1.23                                            : readUByte(byteCodes, i);
    1.24                      wide = false;
    1.25 -                    emit(out, "var @1 = @2;",
    1.26 +                    emit(smapper, out, "var @1 = @2;",
    1.27                           lmapper.setF(indx), smapper.popF());
    1.28                      break;
    1.29                  }
    1.30 @@ -498,7 +498,7 @@
    1.31                      final int indx = wide ? readUShort(byteCodes, i++)
    1.32                                            : readUByte(byteCodes, i);
    1.33                      wide = false;
    1.34 -                    emit(out, "var @1 = @2;",
    1.35 +                    emit(smapper, out, "var @1 = @2;",
    1.36                           lmapper.setD(indx), smapper.popD());
    1.37                      break;
    1.38                  }
    1.39 @@ -507,181 +507,181 @@
    1.40                      final int indx = wide ? readUShort(byteCodes, i++)
    1.41                                            : readUByte(byteCodes, i);
    1.42                      wide = false;
    1.43 -                    emit(out, "var @1 = @2;",
    1.44 +                    emit(smapper, out, "var @1 = @2;",
    1.45                           lmapper.setA(indx), smapper.popA());
    1.46                      break;
    1.47                  }
    1.48                  case opc_astore_0:
    1.49 -                    emit(out, "var @1 = @2;", lmapper.setA(0), smapper.popA());
    1.50 +                    emit(smapper, out, "var @1 = @2;", lmapper.setA(0), smapper.popA());
    1.51                      break;
    1.52                  case opc_istore_0:
    1.53 -                    emit(out, "var @1 = @2;", lmapper.setI(0), smapper.popI());
    1.54 +                    emit(smapper, out, "var @1 = @2;", lmapper.setI(0), smapper.popI());
    1.55                      break;
    1.56                  case opc_lstore_0:
    1.57 -                    emit(out, "var @1 = @2;", lmapper.setL(0), smapper.popL());
    1.58 +                    emit(smapper, out, "var @1 = @2;", lmapper.setL(0), smapper.popL());
    1.59                      break;
    1.60                  case opc_fstore_0:
    1.61 -                    emit(out, "var @1 = @2;", lmapper.setF(0), smapper.popF());
    1.62 +                    emit(smapper, out, "var @1 = @2;", lmapper.setF(0), smapper.popF());
    1.63                      break;
    1.64                  case opc_dstore_0:
    1.65 -                    emit(out, "var @1 = @2;", lmapper.setD(0), smapper.popD());
    1.66 +                    emit(smapper, out, "var @1 = @2;", lmapper.setD(0), smapper.popD());
    1.67                      break;
    1.68                  case opc_astore_1:
    1.69 -                    emit(out, "var @1 = @2;", lmapper.setA(1), smapper.popA());
    1.70 +                    emit(smapper, out, "var @1 = @2;", lmapper.setA(1), smapper.popA());
    1.71                      break;
    1.72                  case opc_istore_1:
    1.73 -                    emit(out, "var @1 = @2;", lmapper.setI(1), smapper.popI());
    1.74 +                    emit(smapper, out, "var @1 = @2;", lmapper.setI(1), smapper.popI());
    1.75                      break;
    1.76                  case opc_lstore_1:
    1.77 -                    emit(out, "var @1 = @2;", lmapper.setL(1), smapper.popL());
    1.78 +                    emit(smapper, out, "var @1 = @2;", lmapper.setL(1), smapper.popL());
    1.79                      break;
    1.80                  case opc_fstore_1:
    1.81 -                    emit(out, "var @1 = @2;", lmapper.setF(1), smapper.popF());
    1.82 +                    emit(smapper, out, "var @1 = @2;", lmapper.setF(1), smapper.popF());
    1.83                      break;
    1.84                  case opc_dstore_1:
    1.85 -                    emit(out, "var @1 = @2;", lmapper.setD(1), smapper.popD());
    1.86 +                    emit(smapper, out, "var @1 = @2;", lmapper.setD(1), smapper.popD());
    1.87                      break;
    1.88                  case opc_astore_2:
    1.89 -                    emit(out, "var @1 = @2;", lmapper.setA(2), smapper.popA());
    1.90 +                    emit(smapper, out, "var @1 = @2;", lmapper.setA(2), smapper.popA());
    1.91                      break;
    1.92                  case opc_istore_2:
    1.93 -                    emit(out, "var @1 = @2;", lmapper.setI(2), smapper.popI());
    1.94 +                    emit(smapper, out, "var @1 = @2;", lmapper.setI(2), smapper.popI());
    1.95                      break;
    1.96                  case opc_lstore_2:
    1.97 -                    emit(out, "var @1 = @2;", lmapper.setL(2), smapper.popL());
    1.98 +                    emit(smapper, out, "var @1 = @2;", lmapper.setL(2), smapper.popL());
    1.99                      break;
   1.100                  case opc_fstore_2:
   1.101 -                    emit(out, "var @1 = @2;", lmapper.setF(2), smapper.popF());
   1.102 +                    emit(smapper, out, "var @1 = @2;", lmapper.setF(2), smapper.popF());
   1.103                      break;
   1.104                  case opc_dstore_2:
   1.105 -                    emit(out, "var @1 = @2;", lmapper.setD(2), smapper.popD());
   1.106 +                    emit(smapper, out, "var @1 = @2;", lmapper.setD(2), smapper.popD());
   1.107                      break;
   1.108                  case opc_astore_3:
   1.109 -                    emit(out, "var @1 = @2;", lmapper.setA(3), smapper.popA());
   1.110 +                    emit(smapper, out, "var @1 = @2;", lmapper.setA(3), smapper.popA());
   1.111                      break;
   1.112                  case opc_istore_3:
   1.113 -                    emit(out, "var @1 = @2;", lmapper.setI(3), smapper.popI());
   1.114 +                    emit(smapper, out, "var @1 = @2;", lmapper.setI(3), smapper.popI());
   1.115                      break;
   1.116                  case opc_lstore_3:
   1.117 -                    emit(out, "var @1 = @2;", lmapper.setL(3), smapper.popL());
   1.118 +                    emit(smapper, out, "var @1 = @2;", lmapper.setL(3), smapper.popL());
   1.119                      break;
   1.120                  case opc_fstore_3:
   1.121 -                    emit(out, "var @1 = @2;", lmapper.setF(3), smapper.popF());
   1.122 +                    emit(smapper, out, "var @1 = @2;", lmapper.setF(3), smapper.popF());
   1.123                      break;
   1.124                  case opc_dstore_3:
   1.125 -                    emit(out, "var @1 = @2;", lmapper.setD(3), smapper.popD());
   1.126 +                    emit(smapper, out, "var @1 = @2;", lmapper.setD(3), smapper.popD());
   1.127                      break;
   1.128                  case opc_iadd:
   1.129 -                    emit(out, "@1 = @1.add32(@2);", smapper.getI(1), smapper.popI());
   1.130 +                    emit(smapper, out, "@1 = @1.add32(@2);", smapper.getI(1), smapper.popI());
   1.131                      break;
   1.132                  case opc_ladd:
   1.133 -                    emit(out, "@1 = @1.add64(@2);", smapper.getL(1), smapper.popL());
   1.134 +                    emit(smapper, out, "@1 = @1.add64(@2);", smapper.getL(1), smapper.popL());
   1.135                      break;
   1.136                  case opc_fadd:
   1.137 -                    emit(out, "@1 += @2;", smapper.getF(1), smapper.popF());
   1.138 +                    emit(smapper, out, "@1 += @2;", smapper.getF(1), smapper.popF());
   1.139                      break;
   1.140                  case opc_dadd:
   1.141 -                    emit(out, "@1 += @2;", smapper.getD(1), smapper.popD());
   1.142 +                    emit(smapper, out, "@1 += @2;", smapper.getD(1), smapper.popD());
   1.143                      break;
   1.144                  case opc_isub:
   1.145 -                    emit(out, "@1 = @1.sub32(@2);", smapper.getI(1), smapper.popI());
   1.146 +                    emit(smapper, out, "@1 = @1.sub32(@2);", smapper.getI(1), smapper.popI());
   1.147                      break;
   1.148                  case opc_lsub:
   1.149 -                    emit(out, "@1 = @1.sub64(@2);", smapper.getL(1), smapper.popL());
   1.150 +                    emit(smapper, out, "@1 = @1.sub64(@2);", smapper.getL(1), smapper.popL());
   1.151                      break;
   1.152                  case opc_fsub:
   1.153 -                    emit(out, "@1 -= @2;", smapper.getF(1), smapper.popF());
   1.154 +                    emit(smapper, out, "@1 -= @2;", smapper.getF(1), smapper.popF());
   1.155                      break;
   1.156                  case opc_dsub:
   1.157 -                    emit(out, "@1 -= @2;", smapper.getD(1), smapper.popD());
   1.158 +                    emit(smapper, out, "@1 -= @2;", smapper.getD(1), smapper.popD());
   1.159                      break;
   1.160                  case opc_imul:
   1.161 -                    emit(out, "@1 = @1.mul32(@2);", smapper.getI(1), smapper.popI());
   1.162 +                    emit(smapper, out, "@1 = @1.mul32(@2);", smapper.getI(1), smapper.popI());
   1.163                      break;
   1.164                  case opc_lmul:
   1.165 -                    emit(out, "@1 = @1.mul64(@2);", smapper.getL(1), smapper.popL());
   1.166 +                    emit(smapper, out, "@1 = @1.mul64(@2);", smapper.getL(1), smapper.popL());
   1.167                      break;
   1.168                  case opc_fmul:
   1.169 -                    emit(out, "@1 *= @2;", smapper.getF(1), smapper.popF());
   1.170 +                    emit(smapper, out, "@1 *= @2;", smapper.getF(1), smapper.popF());
   1.171                      break;
   1.172                  case opc_dmul:
   1.173 -                    emit(out, "@1 *= @2;", smapper.getD(1), smapper.popD());
   1.174 +                    emit(smapper, out, "@1 *= @2;", smapper.getD(1), smapper.popD());
   1.175                      break;
   1.176                  case opc_idiv:
   1.177 -                    emit(out, "@1 = @1.div32(@2);",
   1.178 +                    emit(smapper, out, "@1 = @1.div32(@2);",
   1.179                           smapper.getI(1), smapper.popI());
   1.180                      break;
   1.181                  case opc_ldiv:
   1.182 -                    emit(out, "@1 = @1.div64(@2);",
   1.183 +                    emit(smapper, out, "@1 = @1.div64(@2);",
   1.184                           smapper.getL(1), smapper.popL());
   1.185                      break;
   1.186                  case opc_fdiv:
   1.187 -                    emit(out, "@1 /= @2;", smapper.getF(1), smapper.popF());
   1.188 +                    emit(smapper, out, "@1 /= @2;", smapper.getF(1), smapper.popF());
   1.189                      break;
   1.190                  case opc_ddiv:
   1.191 -                    emit(out, "@1 /= @2;", smapper.getD(1), smapper.popD());
   1.192 +                    emit(smapper, out, "@1 /= @2;", smapper.getD(1), smapper.popD());
   1.193                      break;
   1.194                  case opc_irem:
   1.195 -                    emit(out, "@1 = @1.mod32(@2);",
   1.196 +                    emit(smapper, out, "@1 = @1.mod32(@2);",
   1.197                           smapper.getI(1), smapper.popI());
   1.198                      break;
   1.199                  case opc_lrem:
   1.200 -                    emit(out, "@1 = @1.mod64(@2);",
   1.201 +                    emit(smapper, out, "@1 = @1.mod64(@2);",
   1.202                           smapper.getL(1), smapper.popL());
   1.203                      break;
   1.204                  case opc_frem:
   1.205 -                    emit(out, "@1 %= @2;", smapper.getF(1), smapper.popF());
   1.206 +                    emit(smapper, out, "@1 %= @2;", smapper.getF(1), smapper.popF());
   1.207                      break;
   1.208                  case opc_drem:
   1.209 -                    emit(out, "@1 %= @2;", smapper.getD(1), smapper.popD());
   1.210 +                    emit(smapper, out, "@1 %= @2;", smapper.getD(1), smapper.popD());
   1.211                      break;
   1.212                  case opc_iand:
   1.213 -                    emit(out, "@1 &= @2;", smapper.getI(1), smapper.popI());
   1.214 +                    emit(smapper, out, "@1 &= @2;", smapper.getI(1), smapper.popI());
   1.215                      break;
   1.216                  case opc_land:
   1.217 -                    emit(out, "@1 = @1.and64(@2);", smapper.getL(1), smapper.popL());
   1.218 +                    emit(smapper, out, "@1 = @1.and64(@2);", smapper.getL(1), smapper.popL());
   1.219                      break;
   1.220                  case opc_ior:
   1.221 -                    emit(out, "@1 |= @2;", smapper.getI(1), smapper.popI());
   1.222 +                    emit(smapper, out, "@1 |= @2;", smapper.getI(1), smapper.popI());
   1.223                      break;
   1.224                  case opc_lor:
   1.225 -                    emit(out, "@1 = @1.or64(@2);", smapper.getL(1), smapper.popL());
   1.226 +                    emit(smapper, out, "@1 = @1.or64(@2);", smapper.getL(1), smapper.popL());
   1.227                      break;
   1.228                  case opc_ixor:
   1.229 -                    emit(out, "@1 ^= @2;", smapper.getI(1), smapper.popI());
   1.230 +                    emit(smapper, out, "@1 ^= @2;", smapper.getI(1), smapper.popI());
   1.231                      break;
   1.232                  case opc_lxor:
   1.233 -                    emit(out, "@1 = @1.xor64(@2);", smapper.getL(1), smapper.popL());
   1.234 +                    emit(smapper, out, "@1 = @1.xor64(@2);", smapper.getL(1), smapper.popL());
   1.235                      break;
   1.236                  case opc_ineg:
   1.237 -                    emit(out, "@1 = @1.neg32();", smapper.getI(0));
   1.238 +                    emit(smapper, out, "@1 = @1.neg32();", smapper.getI(0));
   1.239                      break;
   1.240                  case opc_lneg:
   1.241 -                    emit(out, "@1 = @1.neg64();", smapper.getL(0));
   1.242 +                    emit(smapper, out, "@1 = @1.neg64();", smapper.getL(0));
   1.243                      break;
   1.244                  case opc_fneg:
   1.245 -                    emit(out, "@1 = -@1;", smapper.getF(0));
   1.246 +                    emit(smapper, out, "@1 = -@1;", smapper.getF(0));
   1.247                      break;
   1.248                  case opc_dneg:
   1.249 -                    emit(out, "@1 = -@1;", smapper.getD(0));
   1.250 +                    emit(smapper, out, "@1 = -@1;", smapper.getD(0));
   1.251                      break;
   1.252                  case opc_ishl:
   1.253 -                    emit(out, "@1 <<= @2;", smapper.getI(1), smapper.popI());
   1.254 +                    emit(smapper, out, "@1 <<= @2;", smapper.getI(1), smapper.popI());
   1.255                      break;
   1.256                  case opc_lshl:
   1.257 -                    emit(out, "@1 = @1.shl64(@2);", smapper.getL(1), smapper.popI());
   1.258 +                    emit(smapper, out, "@1 = @1.shl64(@2);", smapper.getL(1), smapper.popI());
   1.259                      break;
   1.260                  case opc_ishr:
   1.261 -                    emit(out, "@1 >>= @2;", smapper.getI(1), smapper.popI());
   1.262 +                    emit(smapper, out, "@1 >>= @2;", smapper.getI(1), smapper.popI());
   1.263                      break;
   1.264                  case opc_lshr:
   1.265 -                    emit(out, "@1 = @1.shr64(@2);", smapper.getL(1), smapper.popI());
   1.266 +                    emit(smapper, out, "@1 = @1.shr64(@2);", smapper.getL(1), smapper.popI());
   1.267                      break;
   1.268                  case opc_iushr:
   1.269 -                    emit(out, "@1 >>>= @2;", smapper.getI(1), smapper.popI());
   1.270 +                    emit(smapper, out, "@1 >>>= @2;", smapper.getI(1), smapper.popI());
   1.271                      break;
   1.272                  case opc_lushr:
   1.273 -                    emit(out, "@1 = @1.ushr64(@2);", smapper.getL(1), smapper.popI());
   1.274 +                    emit(smapper, out, "@1 = @1.ushr64(@2);", smapper.getL(1), smapper.popI());
   1.275                      break;
   1.276                  case opc_iinc: {
   1.277                      ++i;
   1.278 @@ -692,132 +692,132 @@
   1.279                                              : byteCodes[i];
   1.280                      wide = false;
   1.281                      if (incrBy == 1) {
   1.282 -                        emit(out, "@1++;", lmapper.getI(varIndx));
   1.283 +                        emit(smapper, out, "@1++;", lmapper.getI(varIndx));
   1.284                      } else {
   1.285 -                        emit(out, "@1 += @2;",
   1.286 +                        emit(smapper, out, "@1 += @2;",
   1.287                               lmapper.getI(varIndx),
   1.288                               Integer.toString(incrBy));
   1.289                      }
   1.290                      break;
   1.291                  }
   1.292                  case opc_return:
   1.293 -                    emit(out, "return;");
   1.294 +                    emit(smapper, out, "return;");
   1.295                      break;
   1.296                  case opc_ireturn:
   1.297 -                    emit(out, "return @1;", smapper.popI());
   1.298 +                    emit(smapper, out, "return @1;", smapper.popI());
   1.299                      break;
   1.300                  case opc_lreturn:
   1.301 -                    emit(out, "return @1;", smapper.popL());
   1.302 +                    emit(smapper, out, "return @1;", smapper.popL());
   1.303                      break;
   1.304                  case opc_freturn:
   1.305 -                    emit(out, "return @1;", smapper.popF());
   1.306 +                    emit(smapper, out, "return @1;", smapper.popF());
   1.307                      break;
   1.308                  case opc_dreturn:
   1.309 -                    emit(out, "return @1;", smapper.popD());
   1.310 +                    emit(smapper, out, "return @1;", smapper.popD());
   1.311                      break;
   1.312                  case opc_areturn:
   1.313 -                    emit(out, "return @1;", smapper.popA());
   1.314 +                    emit(smapper, out, "return @1;", smapper.popA());
   1.315                      break;
   1.316                  case opc_i2l:
   1.317 -                    emit(out, "var @2 = @1;", smapper.popI(), smapper.pushL());
   1.318 +                    emit(smapper, out, "var @2 = @1;", smapper.popI(), smapper.pushL());
   1.319                      break;
   1.320                  case opc_i2f:
   1.321 -                    emit(out, "var @2 = @1;", smapper.popI(), smapper.pushF());
   1.322 +                    emit(smapper, out, "var @2 = @1;", smapper.popI(), smapper.pushF());
   1.323                      break;
   1.324                  case opc_i2d:
   1.325 -                    emit(out, "var @2 = @1;", smapper.popI(), smapper.pushD());
   1.326 +                    emit(smapper, out, "var @2 = @1;", smapper.popI(), smapper.pushD());
   1.327                      break;
   1.328                  case opc_l2i:
   1.329 -                    emit(out, "var @2 = @1.toInt32();", smapper.popL(), smapper.pushI());
   1.330 +                    emit(smapper, out, "var @2 = @1.toInt32();", smapper.popL(), smapper.pushI());
   1.331                      break;
   1.332                      // max int check?
   1.333                  case opc_l2f:
   1.334 -                    emit(out, "var @2 = @1.toFP();", smapper.popL(), smapper.pushF());
   1.335 +                    emit(smapper, out, "var @2 = @1.toFP();", smapper.popL(), smapper.pushF());
   1.336                      break;
   1.337                  case opc_l2d:
   1.338 -                    emit(out, "var @2 = @1.toFP();", smapper.popL(), smapper.pushD());
   1.339 +                    emit(smapper, out, "var @2 = @1.toFP();", smapper.popL(), smapper.pushD());
   1.340                      break;
   1.341                  case opc_f2d:
   1.342 -                    emit(out, "var @2 = @1;", smapper.popF(), smapper.pushD());
   1.343 +                    emit(smapper, out, "var @2 = @1;", smapper.popF(), smapper.pushD());
   1.344                      break;
   1.345                  case opc_d2f:
   1.346 -                    emit(out, "var @2 = @1;", smapper.popD(), smapper.pushF());
   1.347 +                    emit(smapper, out, "var @2 = @1;", smapper.popD(), smapper.pushF());
   1.348                      break;
   1.349                  case opc_f2i:
   1.350 -                    emit(out, "var @2 = @1.toInt32();",
   1.351 +                    emit(smapper, out, "var @2 = @1.toInt32();",
   1.352                           smapper.popF(), smapper.pushI());
   1.353                      break;
   1.354                  case opc_f2l:
   1.355 -                    emit(out, "var @2 = @1.toLong();",
   1.356 +                    emit(smapper, out, "var @2 = @1.toLong();",
   1.357                           smapper.popF(), smapper.pushL());
   1.358                      break;
   1.359                  case opc_d2i:
   1.360 -                    emit(out, "var @2 = @1.toInt32();",
   1.361 +                    emit(smapper, out, "var @2 = @1.toInt32();",
   1.362                           smapper.popD(), smapper.pushI());
   1.363                      break;
   1.364                  case opc_d2l:
   1.365 -                    emit(out, "var @2 = @1.toLong();",
   1.366 +                    emit(smapper, out, "var @2 = @1.toLong();",
   1.367                           smapper.popD(), smapper.pushL());
   1.368                      break;
   1.369                  case opc_i2b:
   1.370 -                    emit(out, "var @1 = @1.toInt8();", smapper.getI(0));
   1.371 +                    emit(smapper, out, "var @1 = @1.toInt8();", smapper.getI(0));
   1.372                      break;
   1.373                  case opc_i2c:
   1.374                      out.append("{ /* number conversion */ }");
   1.375                      break;
   1.376                  case opc_i2s:
   1.377 -                    emit(out, "var @1 = @1.toInt16();", smapper.getI(0));
   1.378 +                    emit(smapper, out, "var @1 = @1.toInt16();", smapper.getI(0));
   1.379                      break;
   1.380                  case opc_aconst_null:
   1.381 -                    emit(out, "var @1 = null;", smapper.pushA());
   1.382 +                    emit(smapper, out, "var @1 = null;", smapper.pushA());
   1.383                      break;
   1.384                  case opc_iconst_m1:
   1.385 -                    emit(out, "var @1 = -1;", smapper.pushI());
   1.386 +                    emit(smapper, out, "var @1 = -1;", smapper.pushI());
   1.387                      break;
   1.388                  case opc_iconst_0:
   1.389 -                    emit(out, "var @1 = 0;", smapper.pushI());
   1.390 +                    emit(smapper, out, "var @1 = 0;", smapper.pushI());
   1.391                      break;
   1.392                  case opc_dconst_0:
   1.393 -                    emit(out, "var @1 = 0;", smapper.pushD());
   1.394 +                    emit(smapper, out, "var @1 = 0;", smapper.pushD());
   1.395                      break;
   1.396                  case opc_lconst_0:
   1.397 -                    emit(out, "var @1 = 0;", smapper.pushL());
   1.398 +                    emit(smapper, out, "var @1 = 0;", smapper.pushL());
   1.399                      break;
   1.400                  case opc_fconst_0:
   1.401 -                    emit(out, "var @1 = 0;", smapper.pushF());
   1.402 +                    emit(smapper, out, "var @1 = 0;", smapper.pushF());
   1.403                      break;
   1.404                  case opc_iconst_1:
   1.405 -                    emit(out, "var @1 = 1;", smapper.pushI());
   1.406 +                    emit(smapper, out, "var @1 = 1;", smapper.pushI());
   1.407                      break;
   1.408                  case opc_lconst_1:
   1.409 -                    emit(out, "var @1 = 1;", smapper.pushL());
   1.410 +                    emit(smapper, out, "var @1 = 1;", smapper.pushL());
   1.411                      break;
   1.412                  case opc_fconst_1:
   1.413 -                    emit(out, "var @1 = 1;", smapper.pushF());
   1.414 +                    emit(smapper, out, "var @1 = 1;", smapper.pushF());
   1.415                      break;
   1.416                  case opc_dconst_1:
   1.417 -                    emit(out, "var @1 = 1;", smapper.pushD());
   1.418 +                    emit(smapper, out, "var @1 = 1;", smapper.pushD());
   1.419                      break;
   1.420                  case opc_iconst_2:
   1.421 -                    emit(out, "var @1 = 2;", smapper.pushI());
   1.422 +                    emit(smapper, out, "var @1 = 2;", smapper.pushI());
   1.423                      break;
   1.424                  case opc_fconst_2:
   1.425 -                    emit(out, "var @1 = 2;", smapper.pushF());
   1.426 +                    emit(smapper, out, "var @1 = 2;", smapper.pushF());
   1.427                      break;
   1.428                  case opc_iconst_3:
   1.429 -                    emit(out, "var @1 = 3;", smapper.pushI());
   1.430 +                    emit(smapper, out, "var @1 = 3;", smapper.pushI());
   1.431                      break;
   1.432                  case opc_iconst_4:
   1.433 -                    emit(out, "var @1 = 4;", smapper.pushI());
   1.434 +                    emit(smapper, out, "var @1 = 4;", smapper.pushI());
   1.435                      break;
   1.436                  case opc_iconst_5:
   1.437 -                    emit(out, "var @1 = 5;", smapper.pushI());
   1.438 +                    emit(smapper, out, "var @1 = 5;", smapper.pushI());
   1.439                      break;
   1.440                  case opc_ldc: {
   1.441                      int indx = readUByte(byteCodes, ++i);
   1.442                      String v = encodeConstant(indx);
   1.443                      int type = VarType.fromConstantType(jc.getTag(indx));
   1.444 -                    emit(out, "var @1 = @2;", smapper.pushT(type), v);
   1.445 +                    emit(smapper, out, "var @1 = @2;", smapper.pushT(type), v);
   1.446                      break;
   1.447                  }
   1.448                  case opc_ldc_w:
   1.449 @@ -830,25 +830,25 @@
   1.450                          final Long lv = new Long(v);
   1.451                          final int low = (int)(lv.longValue() & 0xFFFFFFFF);
   1.452                          final int hi = (int)(lv.longValue() >> 32);
   1.453 -                        emit(out, "var @1 = 0x@3.next32(0x@2);", smapper.pushL(), 
   1.454 +                        emit(smapper, out, "var @1 = 0x@3.next32(0x@2);", smapper.pushL(), 
   1.455                                  Integer.toHexString(low), Integer.toHexString(hi));
   1.456                      } else {
   1.457 -                        emit(out, "var @1 = @2;", smapper.pushT(type), v);
   1.458 +                        emit(smapper, out, "var @1 = @2;", smapper.pushT(type), v);
   1.459                      }
   1.460                      break;
   1.461                  }
   1.462                  case opc_lcmp:
   1.463 -                    emit(out, "var @3 = @2.compare64(@1);",
   1.464 +                    emit(smapper, out, "var @3 = @2.compare64(@1);",
   1.465                           smapper.popL(), smapper.popL(), smapper.pushI());
   1.466                      break;
   1.467                  case opc_fcmpl:
   1.468                  case opc_fcmpg:
   1.469 -                    emit(out, "var @3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",
   1.470 +                    emit(smapper, out, "var @3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",
   1.471                           smapper.popF(), smapper.popF(), smapper.pushI());
   1.472                      break;
   1.473                  case opc_dcmpl:
   1.474                  case opc_dcmpg:
   1.475 -                    emit(out, "var @3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",
   1.476 +                    emit(smapper, out, "var @3 = (@2 == @1) ? 0 : ((@2 < @1) ? -1 : 1);",
   1.477                           smapper.popD(), smapper.popD(), smapper.pushI());
   1.478                      break;
   1.479                  case opc_if_acmpeq:
   1.480 @@ -865,56 +865,56 @@
   1.481                      break;
   1.482                  case opc_ifeq: {
   1.483                      int indx = i + readShortArg(byteCodes, i);
   1.484 -                    emitIf(out, "if (@1 == 0) ",
   1.485 +                    emitIf(smapper, out, "if (@1 == 0) ",
   1.486                           smapper.popI(), i, indx, topMostLabel);
   1.487                      i += 2;
   1.488                      break;
   1.489                  }
   1.490                  case opc_ifne: {
   1.491                      int indx = i + readShortArg(byteCodes, i);
   1.492 -                    emitIf(out, "if (@1 != 0) ",
   1.493 +                    emitIf(smapper, out, "if (@1 != 0) ",
   1.494                           smapper.popI(), i, indx, topMostLabel);
   1.495                      i += 2;
   1.496                      break;
   1.497                  }
   1.498                  case opc_iflt: {
   1.499                      int indx = i + readShortArg(byteCodes, i);
   1.500 -                    emitIf(out, "if (@1 < 0) ",
   1.501 +                    emitIf(smapper, out, "if (@1 < 0) ",
   1.502                           smapper.popI(), i, indx, topMostLabel);
   1.503                      i += 2;
   1.504                      break;
   1.505                  }
   1.506                  case opc_ifle: {
   1.507                      int indx = i + readShortArg(byteCodes, i);
   1.508 -                    emitIf(out, "if (@1 <= 0) ",
   1.509 +                    emitIf(smapper, out, "if (@1 <= 0) ",
   1.510                           smapper.popI(), i, indx, topMostLabel);
   1.511                      i += 2;
   1.512                      break;
   1.513                  }
   1.514                  case opc_ifgt: {
   1.515                      int indx = i + readShortArg(byteCodes, i);
   1.516 -                    emitIf(out, "if (@1 > 0) ",
   1.517 +                    emitIf(smapper, out, "if (@1 > 0) ",
   1.518                           smapper.popI(), i, indx, topMostLabel);
   1.519                      i += 2;
   1.520                      break;
   1.521                  }
   1.522                  case opc_ifge: {
   1.523                      int indx = i + readShortArg(byteCodes, i);
   1.524 -                    emitIf(out, "if (@1 >= 0) ",
   1.525 +                    emitIf(smapper, out, "if (@1 >= 0) ",
   1.526                           smapper.popI(), i, indx, topMostLabel);
   1.527                      i += 2;
   1.528                      break;
   1.529                  }
   1.530                  case opc_ifnonnull: {
   1.531                      int indx = i + readShortArg(byteCodes, i);
   1.532 -                    emitIf(out, "if (@1 !== null) ",
   1.533 +                    emitIf(smapper, out, "if (@1 !== null) ",
   1.534                           smapper.popA(), i, indx, topMostLabel);
   1.535                      i += 2;
   1.536                      break;
   1.537                  }
   1.538                  case opc_ifnull: {
   1.539                      int indx = i + readShortArg(byteCodes, i);
   1.540 -                    emitIf(out, "if (@1 === null) ",
   1.541 +                    emitIf(smapper, out, "if (@1 === null) ",
   1.542                           smapper.popA(), i, indx, topMostLabel);
   1.543                      i += 2;
   1.544                      break;
   1.545 @@ -969,7 +969,7 @@
   1.546                  case opc_new: {
   1.547                      int indx = readUShortArg(byteCodes, i);
   1.548                      String ci = jc.getClassName(indx);
   1.549 -                    emit(out, "var @1 = new @2;",
   1.550 +                    emit(smapper, out, "var @1 = new @2;",
   1.551                           smapper.pushA(), accessClass(mangleClassName(ci)));
   1.552                      addReference(ci);
   1.553                      i += 2;
   1.554 @@ -992,53 +992,53 @@
   1.555                      break;
   1.556                  }
   1.557                  case opc_arraylength:
   1.558 -                    emit(out, "var @2 = @1.length;",
   1.559 +                    emit(smapper, out, "var @2 = @1.length;",
   1.560                           smapper.popA(), smapper.pushI());
   1.561                      break;
   1.562                  case opc_lastore:
   1.563 -                    emit(out, "Array.at(@3, @2, @1);",
   1.564 +                    emit(smapper, out, "Array.at(@3, @2, @1);",
   1.565                           smapper.popL(), smapper.popI(), smapper.popA());
   1.566                      break;
   1.567                  case opc_fastore:
   1.568 -                    emit(out, "Array.at(@3, @2, @1);",
   1.569 +                    emit(smapper, out, "Array.at(@3, @2, @1);",
   1.570                           smapper.popF(), smapper.popI(), smapper.popA());
   1.571                      break;
   1.572                  case opc_dastore:
   1.573 -                    emit(out, "Array.at(@3, @2, @1);",
   1.574 +                    emit(smapper, out, "Array.at(@3, @2, @1);",
   1.575                           smapper.popD(), smapper.popI(), smapper.popA());
   1.576                      break;
   1.577                  case opc_aastore:
   1.578 -                    emit(out, "Array.at(@3, @2, @1);",
   1.579 +                    emit(smapper, out, "Array.at(@3, @2, @1);",
   1.580                           smapper.popA(), smapper.popI(), smapper.popA());
   1.581                      break;
   1.582                  case opc_iastore:
   1.583                  case opc_bastore:
   1.584                  case opc_castore:
   1.585                  case opc_sastore:
   1.586 -                    emit(out, "Array.at(@3, @2, @1);",
   1.587 +                    emit(smapper, out, "Array.at(@3, @2, @1);",
   1.588                           smapper.popI(), smapper.popI(), smapper.popA());
   1.589                      break;
   1.590                  case opc_laload:
   1.591 -                    emit(out, "var @3 = Array.at(@2, @1);",
   1.592 +                    emit(smapper, out, "var @3 = Array.at(@2, @1);",
   1.593                           smapper.popI(), smapper.popA(), smapper.pushL());
   1.594                      break;
   1.595                  case opc_faload:
   1.596 -                    emit(out, "var @3 = Array.at(@2, @1);",
   1.597 +                    emit(smapper, out, "var @3 = Array.at(@2, @1);",
   1.598                           smapper.popI(), smapper.popA(), smapper.pushF());
   1.599                      break;
   1.600                  case opc_daload:
   1.601 -                    emit(out, "var @3 = Array.at(@2, @1);",
   1.602 +                    emit(smapper, out, "var @3 = Array.at(@2, @1);",
   1.603                           smapper.popI(), smapper.popA(), smapper.pushD());
   1.604                      break;
   1.605                  case opc_aaload:
   1.606 -                    emit(out, "var @3 = Array.at(@2, @1);",
   1.607 +                    emit(smapper, out, "var @3 = Array.at(@2, @1);",
   1.608                           smapper.popI(), smapper.popA(), smapper.pushA());
   1.609                      break;
   1.610                  case opc_iaload:
   1.611                  case opc_baload:
   1.612                  case opc_caload:
   1.613                  case opc_saload:
   1.614 -                    emit(out, "var @3 = Array.at(@2, @1);",
   1.615 +                    emit(smapper, out, "var @3 = Array.at(@2, @1);",
   1.616                           smapper.popI(), smapper.popA(), smapper.pushI());
   1.617                      break;
   1.618                  case opc_pop:
   1.619 @@ -1048,18 +1048,18 @@
   1.620                      break;
   1.621                  case opc_dup: {
   1.622                      final Variable v = smapper.get(0);
   1.623 -                    emit(out, "var @1 = @2;", smapper.pushT(v.getType()), v);
   1.624 +                    emit(smapper, out, "var @1 = @2;", smapper.pushT(v.getType()), v);
   1.625                      break;
   1.626                  }
   1.627                  case opc_dup2: {
   1.628                      final Variable vi1 = smapper.get(0);
   1.629  
   1.630                      if (vi1.isCategory2()) {
   1.631 -                        emit(out, "var @1 = @2;",
   1.632 +                        emit(smapper, out, "var @1 = @2;",
   1.633                               smapper.pushT(vi1.getType()), vi1);
   1.634                      } else {
   1.635                          final Variable vi2 = smapper.get(1);
   1.636 -                        emit(out, "var @1 = @2, @3 = @4;",
   1.637 +                        emit(smapper, out, "var @1 = @2, @3 = @4;",
   1.638                               smapper.pushT(vi2.getType()), vi2,
   1.639                               smapper.pushT(vi1.getType()), vi1);
   1.640                      }
   1.641 @@ -1072,7 +1072,7 @@
   1.642                      final Variable vo2 = smapper.pushT(vi2.getType());
   1.643                      final Variable vo1 = smapper.pushT(vi1.getType());
   1.644  
   1.645 -                    emit(out, "var @1 = @2, @3 = @4, @5 = @6;",
   1.646 +                    emit(smapper, out, "var @1 = @2, @3 = @4, @5 = @6;",
   1.647                           vo1, vi1, vo2, vi2, vo3, vo1);
   1.648                      break;
   1.649                  }
   1.650 @@ -1085,7 +1085,7 @@
   1.651                          final Variable vo2 = smapper.pushT(vi2.getType());
   1.652                          final Variable vo1 = smapper.pushT(vi1.getType());
   1.653  
   1.654 -                        emit(out, "var @1 = @2, @3 = @4, @5 = @6;",
   1.655 +                        emit(smapper, out, "var @1 = @2, @3 = @4, @5 = @6;",
   1.656                               vo1, vi1, vo2, vi2, vo3, vo1);
   1.657                      } else {
   1.658                          final Variable vi3 = smapper.pop();
   1.659 @@ -1095,9 +1095,9 @@
   1.660                          final Variable vo2 = smapper.pushT(vi2.getType());
   1.661                          final Variable vo1 = smapper.pushT(vi1.getType());
   1.662  
   1.663 -                        emit(out, "var @1 = @2, @3 = @4, @5 = @6,",
   1.664 +                        emit(smapper, out, "var @1 = @2, @3 = @4, @5 = @6,",
   1.665                               vo1, vi1, vo2, vi2, vo3, vi3);
   1.666 -                        emit(out, " @1 = @2, @3 = @4;",
   1.667 +                        emit(smapper, out, " @1 = @2, @3 = @4;",
   1.668                               vo4, vo1, vo5, vo2);
   1.669                      }
   1.670                      break;
   1.671 @@ -1111,7 +1111,7 @@
   1.672                          final Variable vo2 = smapper.pushT(vi2.getType());
   1.673                          final Variable vo1 = smapper.pushT(vi1.getType());
   1.674  
   1.675 -                        emit(out, "var @1 = @2, @3 = @4, @5 = @6;",
   1.676 +                        emit(smapper, out, "var @1 = @2, @3 = @4, @5 = @6;",
   1.677                               vo1, vi1, vo2, vi2, vo3, vo1);
   1.678                      } else {
   1.679                          final Variable vi3 = smapper.pop();
   1.680 @@ -1120,7 +1120,7 @@
   1.681                          final Variable vo2 = smapper.pushT(vi2.getType());
   1.682                          final Variable vo1 = smapper.pushT(vi1.getType());
   1.683  
   1.684 -                        emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",
   1.685 +                        emit(smapper, out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",
   1.686                               vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);
   1.687                      }
   1.688                      break;
   1.689 @@ -1135,7 +1135,7 @@
   1.690                              final Variable vo2 = smapper.pushT(vi2.getType());
   1.691                              final Variable vo1 = smapper.pushT(vi1.getType());
   1.692  
   1.693 -                            emit(out, "var @1 = @2, @3 = @4, @5 = @6;",
   1.694 +                            emit(smapper, out, "var @1 = @2, @3 = @4, @5 = @6;",
   1.695                                   vo1, vi1, vo2, vi2, vo3, vo1);
   1.696                          } else {
   1.697                              final Variable vi3 = smapper.pop();
   1.698 @@ -1144,7 +1144,7 @@
   1.699                              final Variable vo2 = smapper.pushT(vi2.getType());
   1.700                              final Variable vo1 = smapper.pushT(vi1.getType());
   1.701  
   1.702 -                            emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",
   1.703 +                            emit(smapper, out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8;",
   1.704                                   vo1, vi1, vo2, vi2, vo3, vi3, vo4, vo1);
   1.705                          }
   1.706                      } else {
   1.707 @@ -1157,9 +1157,9 @@
   1.708                              final Variable vo2 = smapper.pushT(vi2.getType());
   1.709                              final Variable vo1 = smapper.pushT(vi1.getType());
   1.710  
   1.711 -                            emit(out, "var @1 = @2, @3 = @4, @5 = @6,",
   1.712 +                            emit(smapper, out, "var @1 = @2, @3 = @4, @5 = @6,",
   1.713                                   vo1, vi1, vo2, vi2, vo3, vi3);
   1.714 -                            emit(out, " @1 = @2, @3 = @4;",
   1.715 +                            emit(smapper, out, " @1 = @2, @3 = @4;",
   1.716                                   vo4, vo1, vo5, vo2);
   1.717                          } else {
   1.718                              final Variable vi4 = smapper.pop();
   1.719 @@ -1170,9 +1170,9 @@
   1.720                              final Variable vo2 = smapper.pushT(vi2.getType());
   1.721                              final Variable vo1 = smapper.pushT(vi1.getType());
   1.722                              
   1.723 -                            emit(out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8,",
   1.724 +                            emit(smapper, out, "var @1 = @2, @3 = @4, @5 = @6, @7 = @8,",
   1.725                                   vo1, vi1, vo2, vi2, vo3, vi3, vo4, vi4);
   1.726 -                            emit(out, " @1 = @2, @3 = @4;",
   1.727 +                            emit(smapper, out, " @1 = @2, @3 = @4;",
   1.728                                   vo5, vo1, vo6, vo2);
   1.729                          }
   1.730                      }
   1.731 @@ -1185,7 +1185,7 @@
   1.732                      if (vi1.getType() == vi2.getType()) {
   1.733                          final Variable tmp = smapper.pushT(vi1.getType());
   1.734  
   1.735 -                        emit(out, "var @1 = @2, @2 = @3, @3 = @1;",
   1.736 +                        emit(smapper, out, "var @1 = @2, @2 = @3, @3 = @1;",
   1.737                               tmp, vi1, vi2);
   1.738                          smapper.pop(1);
   1.739                      } else {
   1.740 @@ -1196,11 +1196,11 @@
   1.741                      break;
   1.742                  }
   1.743                  case opc_bipush:
   1.744 -                    emit(out, "var @1 = @2;",
   1.745 +                    emit(smapper, out, "var @1 = @2;",
   1.746                           smapper.pushI(), Integer.toString(byteCodes[++i]));
   1.747                      break;
   1.748                  case opc_sipush:
   1.749 -                    emit(out, "var @1 = @2;",
   1.750 +                    emit(smapper, out, "var @1 = @2;",
   1.751                           smapper.pushI(),
   1.752                           Integer.toString(readShortArg(byteCodes, i)));
   1.753                      i += 2;
   1.754 @@ -1211,7 +1211,7 @@
   1.755                      final int type = VarType.fromFieldType(fi[2].charAt(0));
   1.756                      final String mangleClass = mangleClassName(fi[0]);
   1.757                      final String mangleClassAccess = accessClass(mangleClass);
   1.758 -                    emit(out, "var @2 = @4(false)._@3.call(@1);",
   1.759 +                    emit(smapper, out, "var @2 = @4(false)._@3.call(@1);",
   1.760                           smapper.popA(),
   1.761                           smapper.pushT(type), fi[1], mangleClassAccess
   1.762                      );
   1.763 @@ -1224,7 +1224,7 @@
   1.764                      final int type = VarType.fromFieldType(fi[2].charAt(0));
   1.765                      final String mangleClass = mangleClassName(fi[0]);
   1.766                      final String mangleClassAccess = accessClass(mangleClass);
   1.767 -                    emit(out, "@4(false)._@3.call(@2, @1);",
   1.768 +                    emit(smapper, out, "@4(false)._@3.call(@2, @1);",
   1.769                           smapper.popT(type),
   1.770                           smapper.popA(), fi[1], 
   1.771                           mangleClassAccess
   1.772 @@ -1236,7 +1236,7 @@
   1.773                      int indx = readUShortArg(byteCodes, i);
   1.774                      String[] fi = jc.getFieldInfoName(indx);
   1.775                      final int type = VarType.fromFieldType(fi[2].charAt(0));
   1.776 -                    emit(out, "var @1 = @2(false)._@3();",
   1.777 +                    emit(smapper, out, "var @1 = @2(false)._@3();",
   1.778                           smapper.pushT(type),
   1.779                           accessClass(mangleClassName(fi[0])), fi[1]);
   1.780                      i += 2;
   1.781 @@ -1247,7 +1247,7 @@
   1.782                      int indx = readUShortArg(byteCodes, i);
   1.783                      String[] fi = jc.getFieldInfoName(indx);
   1.784                      final int type = VarType.fromFieldType(fi[2].charAt(0));
   1.785 -                    emit(out, "@1(false)._@2(@3);",
   1.786 +                    emit(smapper, out, "@1(false)._@2(@3);",
   1.787                           accessClass(mangleClassName(fi[0])), fi[1],
   1.788                           smapper.popT(type));
   1.789                      i += 2;
   1.790 @@ -1270,7 +1270,7 @@
   1.791                      final Variable v = smapper.popA();
   1.792                      smapper.clear();
   1.793  
   1.794 -                    emit(out, "{ var @1 = @2; throw @2; }",
   1.795 +                    emit(smapper, out, "{ var @1 = @2; throw @2; }",
   1.796                           smapper.pushA(), v);
   1.797                      break;
   1.798                  }
   1.799 @@ -1293,7 +1293,7 @@
   1.800  
   1.801                  default: {
   1.802                      wide = false;
   1.803 -                    emit(out, "throw 'unknown bytecode @1';",
   1.804 +                    emit(smapper, out, "throw 'unknown bytecode @1';",
   1.805                           Integer.toString(c));
   1.806                  }
   1.807              }
   1.808 @@ -1930,7 +1930,15 @@
   1.809          return ",";
   1.810      }
   1.811  
   1.812 -    static void emit(final Appendable out,
   1.813 +    final void emit(
   1.814 +        StackMapper sm, 
   1.815 +        final Appendable out, 
   1.816 +        final String format, final CharSequence... params
   1.817 +    ) throws IOException {
   1.818 +        sm.flush(out);
   1.819 +        emitImpl(out, format, params);
   1.820 +    }
   1.821 +    static void emitImpl(final Appendable out,
   1.822                               final String format,
   1.823                               final CharSequence... params) throws IOException {
   1.824          final int length = format.length();
   1.825 @@ -1996,10 +2004,13 @@
   1.826      }
   1.827  
   1.828      private static void emitIf(
   1.829 -        Appendable out, String pattern, Variable param, 
   1.830 +        StackMapper sm, 
   1.831 +        Appendable out, String pattern, 
   1.832 +        Variable param, 
   1.833          int current, int to, int canBack
   1.834      ) throws IOException {
   1.835 -        emit(out, pattern, param);
   1.836 +        sm.flush(out);
   1.837 +        emitImpl(out, pattern, param);
   1.838          goTo(out, current, to, canBack);
   1.839      }
   1.840  
   1.841 @@ -2016,7 +2027,7 @@
   1.842              case 11: jvmType = "[J"; break;
   1.843              default: throw new IllegalStateException("Array type: " + atype);
   1.844          }
   1.845 -        emit(out, "var @2 = Array.prototype.newArray__Ljava_lang_Object_2ZLjava_lang_String_2I(true, '@3', @1);",
   1.846 +        emit(smapper, out, "var @2 = Array.prototype.newArray__Ljava_lang_Object_2ZLjava_lang_String_2I(true, '@3', @1);",
   1.847               smapper.popI(), smapper.pushA(), jvmType);
   1.848      }
   1.849  
   1.850 @@ -2027,7 +2038,7 @@
   1.851          } else {
   1.852              typeName = "[L" + typeName + ";";
   1.853          }
   1.854 -        emit(out, "var @2 = Array.prototype.newArray__Ljava_lang_Object_2ZLjava_lang_String_2I(false, '@3', @1);",
   1.855 +        emit(smapper, out, "var @2 = Array.prototype.newArray__Ljava_lang_Object_2ZLjava_lang_String_2I(false, '@3', @1);",
   1.856               smapper.popI(), smapper.pushA(), typeName);
   1.857      }
   1.858  
   1.859 @@ -2043,7 +2054,7 @@
   1.860              dims.insert(1, smapper.popI());
   1.861          }
   1.862          dims.append(']');
   1.863 -        emit(out, "var @2 = Array.prototype.multiNewArray__Ljava_lang_Object_2Ljava_lang_String_2_3II('@3', @1, 0);",
   1.864 +        emit(smapper, out, "var @2 = Array.prototype.multiNewArray__Ljava_lang_Object_2Ljava_lang_String_2_3II('@3', @1, 0);",
   1.865               dims.toString(), smapper.pushA(), typeName);
   1.866          return i;
   1.867      }
   1.868 @@ -2094,11 +2105,11 @@
   1.869      private void generateInstanceOf(int indx, final StackMapper smapper) throws IOException {
   1.870          final String type = jc.getClassName(indx);
   1.871          if (!type.startsWith("[")) {
   1.872 -            emit(out, "var @2 = @1 != null && @1.$instOf_@3 ? 1 : 0;",
   1.873 +            emit(smapper, out, "var @2 = @1 != null && @1.$instOf_@3 ? 1 : 0;",
   1.874                   smapper.popA(), smapper.pushI(),
   1.875                   type.replace('/', '_'));
   1.876          } else {
   1.877 -            emit(out, "var @2 = vm.java_lang_Class(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('@3').isInstance__ZLjava_lang_Object_2(@1);",
   1.878 +            emit(smapper, out, "var @2 = vm.java_lang_Class(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('@3').isInstance__ZLjava_lang_Object_2(@1);",
   1.879                  smapper.popA(), smapper.pushI(),
   1.880                  type
   1.881              );
   1.882 @@ -2108,11 +2119,11 @@
   1.883      private void generateCheckcast(int indx, final StackMapper smapper) throws IOException {
   1.884          final String type = jc.getClassName(indx);
   1.885          if (!type.startsWith("[")) {
   1.886 -            emit(out,
   1.887 +            emit(smapper, out,
   1.888                   "if (@1 !== null && !@1.$instOf_@2) throw vm.java_lang_ClassCastException(true);",
   1.889                   smapper.getA(0), type.replace('/', '_'));
   1.890          } else {
   1.891 -            emit(out, "vm.java_lang_Class(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('@2').cast__Ljava_lang_Object_2Ljava_lang_Object_2(@1);",
   1.892 +            emit(smapper, out, "vm.java_lang_Class(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('@2').cast__Ljava_lang_Object_2Ljava_lang_Object_2(@1);",
   1.893                   smapper.getA(0), type
   1.894              );
   1.895          }
     2.1 --- a/rt/vm/src/main/java/org/apidesign/vm4brwsr/StackMapper.java	Sat Feb 15 15:47:28 2014 +0100
     2.2 +++ b/rt/vm/src/main/java/org/apidesign/vm4brwsr/StackMapper.java	Sat Feb 15 17:23:24 2014 +0100
     2.3 @@ -22,13 +22,16 @@
     2.4  
     2.5  final class StackMapper {
     2.6      private final TypeArray stackTypeIndexPairs;
     2.7 +    private final StringArray stackValues;
     2.8  
     2.9      public StackMapper() {
    2.10          stackTypeIndexPairs = new TypeArray();
    2.11 +        stackValues = new StringArray();
    2.12      }
    2.13  
    2.14      public void clear() {
    2.15          stackTypeIndexPairs.clear();
    2.16 +        stackValues.clear();
    2.17      }
    2.18  
    2.19      public void syncWithFrameStack(final TypeArray frameStack) {
    2.20 @@ -65,7 +68,20 @@
    2.21      }
    2.22  
    2.23      void assign(Appendable out, int varType, CharSequence s) throws IOException {
    2.24 -        ByteCodeToJavaScript.emit(out, "var @1 = @2;", pushT(varType), s);
    2.25 +        pushTypeAndValue(varType, s);
    2.26 +        flush(out);
    2.27 +    }
    2.28 +    
    2.29 +    void flush(Appendable out) throws IOException {
    2.30 +        int count = stackTypeIndexPairs.getSize();
    2.31 +        for (int i = 0; i < count; i++) {
    2.32 +            String val = stackValues.getAndClear(i);
    2.33 +            if (val == null) {
    2.34 +                continue;
    2.35 +            }
    2.36 +            CharSequence var = getVariable(stackTypeIndexPairs.get(i));
    2.37 +            ByteCodeToJavaScript.emitImpl(out, "var @1 = @2;", var, val);
    2.38 +        }
    2.39      }
    2.40      
    2.41      public Variable popI() {
    2.42 @@ -157,8 +173,26 @@
    2.43          final int count = stackTypeIndexPairs.getSize();
    2.44          final int value = (count << 8) | (type & 0xff);
    2.45          stackTypeIndexPairs.add(value);
    2.46 +        
    2.47 +        addStackValue(count, null);
    2.48 +        return value;
    2.49 +    }
    2.50  
    2.51 -        return value;
    2.52 +    private void pushTypeAndValue(final int type, CharSequence v) {
    2.53 +        final int count = stackTypeIndexPairs.getSize();
    2.54 +        final int value = (count << 8) | (type & 0xff);
    2.55 +        stackTypeIndexPairs.add(value);
    2.56 +        final String val = v.toString();
    2.57 +        addStackValue(count, val);
    2.58 +    }
    2.59 +
    2.60 +    private void addStackValue(int at, final String val) {
    2.61 +        final String[] arr = stackValues.toArray();
    2.62 +        if (arr.length > at) {
    2.63 +            arr[at] = val;
    2.64 +        } else {
    2.65 +            stackValues.add(val);
    2.66 +        }
    2.67      }
    2.68  
    2.69      private void popImpl(final int count) {
     3.1 --- a/rt/vm/src/main/java/org/apidesign/vm4brwsr/StringArray.java	Sat Feb 15 15:47:28 2014 +0100
     3.2 +++ b/rt/vm/src/main/java/org/apidesign/vm4brwsr/StringArray.java	Sat Feb 15 17:23:24 2014 +0100
     3.3 @@ -112,4 +112,14 @@
     3.4          }
     3.5          return -1;
     3.6      }
     3.7 +
     3.8 +    String getAndClear(int count) {
     3.9 +        String s = arr[count];
    3.10 +        arr[count] = null;
    3.11 +        return s;
    3.12 +    }
    3.13 +
    3.14 +    void clear() {
    3.15 +        arr = null;
    3.16 +    }
    3.17  }