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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/compiler/ast-graph-builder.h" | 5 #include "src/compiler/ast-graph-builder.h" |
6 | 6 |
7 #include "src/compiler.h" | 7 #include "src/compiler.h" |
8 #include "src/compiler/ast-loop-assignment-analyzer.h" | 8 #include "src/compiler/ast-loop-assignment-analyzer.h" |
9 #include "src/compiler/control-builders.h" | 9 #include "src/compiler/control-builders.h" |
10 #include "src/compiler/linkage.h" | 10 #include "src/compiler/linkage.h" |
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501 | 501 |
502 // Visit implicit declaration of the function name. | 502 // Visit implicit declaration of the function name. |
503 if (scope->is_function_scope() && scope->function() != NULL) { | 503 if (scope->is_function_scope() && scope->function() != NULL) { |
504 VisitVariableDeclaration(scope->function()); | 504 VisitVariableDeclaration(scope->function()); |
505 } | 505 } |
506 | 506 |
507 // Visit declarations within the function scope. | 507 // Visit declarations within the function scope. |
508 VisitDeclarations(scope->declarations()); | 508 VisitDeclarations(scope->declarations()); |
509 | 509 |
510 // Build a stack-check before the body. | 510 // Build a stack-check before the body. |
511 Node* node = BuildStackCheck(); | 511 Node* node = NewNode(javascript()->StackCheck()); |
512 PrepareFrameState(node, BailoutId::FunctionEntry()); | 512 PrepareFrameState(node, BailoutId::FunctionEntry()); |
513 | 513 |
514 // Visit statements in the function body. | 514 // Visit statements in the function body. |
515 VisitStatements(info()->function()->body()); | 515 VisitStatements(info()->function()->body()); |
516 | 516 |
517 // Emit tracing call if requested to do so. | 517 // Emit tracing call if requested to do so. |
518 if (FLAG_trace) { | 518 if (FLAG_trace) { |
519 // TODO(mstarzinger): Only traces implicit return. | 519 // TODO(mstarzinger): Only traces implicit return. |
520 Node* return_value = jsgraph()->UndefinedConstant(); | 520 Node* return_value = jsgraph()->UndefinedConstant(); |
521 NewNode(javascript()->CallRuntime(Runtime::kTraceExit, 1), return_value); | 521 NewNode(javascript()->CallRuntime(Runtime::kTraceExit, 1), return_value); |
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2958 js_op = javascript()->Modulus(); | 2958 js_op = javascript()->Modulus(); |
2959 break; | 2959 break; |
2960 default: | 2960 default: |
2961 UNREACHABLE(); | 2961 UNREACHABLE(); |
2962 js_op = NULL; | 2962 js_op = NULL; |
2963 } | 2963 } |
2964 return NewNode(js_op, left, right); | 2964 return NewNode(js_op, left, right); |
2965 } | 2965 } |
2966 | 2966 |
2967 | 2967 |
2968 Node* AstGraphBuilder::BuildStackCheck() { | |
2969 IfBuilder stack_check(this); | |
2970 Node* limit = BuildLoadExternal( | |
2971 ExternalReference::address_of_stack_limit(isolate()), kMachPtr); | |
2972 Node* stack = NewNode(jsgraph()->machine()->LoadStackPointer()); | |
2973 Node* tag = NewNode(jsgraph()->machine()->UintLessThan(), limit, stack); | |
2974 stack_check.If(tag, BranchHint::kTrue); | |
2975 stack_check.Then(); | |
2976 stack_check.Else(); | |
2977 Node* guard = NewNode(javascript()->CallRuntime(Runtime::kStackGuard, 0)); | |
2978 stack_check.End(); | |
2979 return guard; | |
2980 } | |
2981 | |
2982 | |
2983 bool AstGraphBuilder::CheckOsrEntry(IterationStatement* stmt) { | 2968 bool AstGraphBuilder::CheckOsrEntry(IterationStatement* stmt) { |
2984 if (info()->osr_ast_id() == stmt->OsrEntryId()) { | 2969 if (info()->osr_ast_id() == stmt->OsrEntryId()) { |
2985 info()->set_osr_expr_stack_height(std::max( | 2970 info()->set_osr_expr_stack_height(std::max( |
2986 environment()->stack_height(), info()->osr_expr_stack_height())); | 2971 environment()->stack_height(), info()->osr_expr_stack_height())); |
2987 return true; | 2972 return true; |
2988 } | 2973 } |
2989 return false; | 2974 return false; |
2990 } | 2975 } |
2991 | 2976 |
2992 | 2977 |
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3282 // Phi does not exist yet, introduce one. | 3267 // Phi does not exist yet, introduce one. |
3283 value = NewPhi(inputs, value, control); | 3268 value = NewPhi(inputs, value, control); |
3284 value->ReplaceInput(inputs - 1, other); | 3269 value->ReplaceInput(inputs - 1, other); |
3285 } | 3270 } |
3286 return value; | 3271 return value; |
3287 } | 3272 } |
3288 | 3273 |
3289 } // namespace compiler | 3274 } // namespace compiler |
3290 } // namespace internal | 3275 } // namespace internal |
3291 } // namespace v8 | 3276 } // namespace v8 |
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