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Issue 145023002: A64: implement FullCodeGenerator::VisitForOfStatement. (Closed) Base URL: https://v8.googlecode.com/svn/branches/experimental/a64
Patch Set: Created 6 years, 11 months ago
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1 // Copyright 2013 the V8 project authors. All rights reserved. 1 // Copyright 2013 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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1254 __ Drop(5); 1254 __ Drop(5);
1255 1255
1256 // Exit and decrement the loop depth. 1256 // Exit and decrement the loop depth.
1257 PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS); 1257 PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS);
1258 __ Bind(&exit); 1258 __ Bind(&exit);
1259 decrement_loop_depth(); 1259 decrement_loop_depth();
1260 } 1260 }
1261 1261
1262 1262
1263 void FullCodeGenerator::VisitForOfStatement(ForOfStatement* stmt) { 1263 void FullCodeGenerator::VisitForOfStatement(ForOfStatement* stmt) {
1264 UNIMPLEMENTED(); 1264 Comment cmnt(masm_, "[ ForOfStatement");
1265 SetStatementPosition(stmt);
1266
1267 Iteration loop_statement(this, stmt);
1268 increment_loop_depth();
1269
1270 // var iterator = iterable[@@iterator]()
1271 VisitForAccumulatorValue(stmt->assign_iterator());
1272
1273 // As with for-in, skip the loop if the iterator is null or undefined.
1274 __ CompareRoot(x0, Heap::kUndefinedValueRootIndex);
1275 __ B(eq, loop_statement.break_label());
1276 __ CompareRoot(x0, Heap::kNullValueRootIndex);
1277 __ B(eq, loop_statement.break_label());
1278
1279 // Convert the iterator to a JS object.
1280 Label convert, done_convert;
1281 __ JumpIfSmi(x0, &convert);
1282 __ CompareObjectType(x0, x10, x11, FIRST_SPEC_OBJECT_TYPE);
1283 __ B(ge, &done_convert);
1284 __ Bind(&convert);
1285 __ Push(x0);
1286 __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
1287 __ Bind(&done_convert);
1288 __ Push(x0);
1289
1290 // Loop entry.
1291 __ Bind(loop_statement.continue_label());
1292
1293 // result = iterator.next()
1294 VisitForEffect(stmt->next_result());
1295
1296 // if (result.done) break;
1297 Label result_not_done;
1298 VisitForControl(stmt->result_done(),
1299 loop_statement.break_label(),
1300 &result_not_done,
1301 &result_not_done);
1302 __ Bind(&result_not_done);
1303
1304 // each = result.value
1305 VisitForEffect(stmt->assign_each());
1306
1307 // Generate code for the body of the loop.
1308 Visit(stmt->body());
1309
1310 // Check stack before looping.
1311 PrepareForBailoutForId(stmt->BackEdgeId(), NO_REGISTERS);
1312 EmitBackEdgeBookkeeping(stmt, loop_statement.continue_label());
1313 __ B(loop_statement.continue_label());
1314
1315 // Exit and decrement the loop depth.
1316 PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS);
1317 __ Bind(loop_statement.break_label());
1318 decrement_loop_depth();
1265 } 1319 }
1266 1320
1267 1321
1268 void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info, 1322 void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
1269 bool pretenure) { 1323 bool pretenure) {
1270 // Use the fast case closure allocation code that allocates in new space for 1324 // Use the fast case closure allocation code that allocates in new space for
1271 // nested functions that don't need literals cloning. If we're running with 1325 // nested functions that don't need literals cloning. If we're running with
1272 // the --always-opt or the --prepare-always-opt flag, we need to use the 1326 // the --always-opt or the --prepare-always-opt flag, we need to use the
1273 // runtime function so that the new function we are creating here gets a 1327 // runtime function so that the new function we are creating here gets a
1274 // chance to have its code optimized and doesn't just get a copy of the 1328 // chance to have its code optimized and doesn't just get a copy of the
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4938 return previous_; 4992 return previous_;
4939 } 4993 }
4940 4994
4941 4995
4942 #undef __ 4996 #undef __
4943 4997
4944 4998
4945 } } // namespace v8::internal 4999 } } // namespace v8::internal
4946 5000
4947 #endif // V8_TARGET_ARCH_A64 5001 #endif // V8_TARGET_ARCH_A64
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