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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_IA32. | 5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_IA32. |
6 #if defined(TARGET_ARCH_IA32) | 6 #if defined(TARGET_ARCH_IA32) |
7 | 7 |
8 #include "vm/flow_graph_compiler.h" | 8 #include "vm/flow_graph_compiler.h" |
9 | 9 |
10 #include "lib/error.h" | 10 #include "lib/error.h" |
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892 LocationSummary* prologue_locs = NULL; | 892 LocationSummary* prologue_locs = NULL; |
893 if (is_optimizing()) { | 893 if (is_optimizing()) { |
894 // Spill slots are allocated but not initialized. | 894 // Spill slots are allocated but not initialized. |
895 prologue_locs = new LocationSummary(0, 0, LocationSummary::kCall); | 895 prologue_locs = new LocationSummary(0, 0, LocationSummary::kCall); |
896 prologue_locs->stack_bitmap()->SetLength(StackSize()); | 896 prologue_locs->stack_bitmap()->SetLength(StackSize()); |
897 } | 897 } |
898 | 898 |
899 // We check the number of passed arguments when we have to copy them due to | 899 // We check the number of passed arguments when we have to copy them due to |
900 // the presence of optional parameters. | 900 // the presence of optional parameters. |
901 // No such checking code is generated if only fixed parameters are declared, | 901 // No such checking code is generated if only fixed parameters are declared, |
902 // unless we are debug mode or unless we are compiling a closure. | 902 // unless we are in debug mode or unless we are compiling a closure. |
903 LocalVariable* saved_args_desc_var = | 903 LocalVariable* saved_args_desc_var = |
904 parsed_function().GetSavedArgumentsDescriptorVar(); | 904 parsed_function().GetSavedArgumentsDescriptorVar(); |
905 if (num_copied_params == 0) { | 905 if (num_copied_params == 0) { |
906 #ifdef DEBUG | 906 #ifdef DEBUG |
907 ASSERT(!parsed_function().function().HasOptionalParameters()); | 907 ASSERT(!parsed_function().function().HasOptionalParameters()); |
908 const bool check_arguments = true; | 908 const bool check_arguments = true; |
909 #else | 909 #else |
910 const bool check_arguments = function.IsClosureFunction(); | 910 const bool check_arguments = function.IsClosureFunction(); |
911 #endif | 911 #endif |
912 if (check_arguments) { | 912 if (check_arguments) { |
913 __ Comment("Check argument count"); | 913 __ Comment("Check argument count"); |
914 // Check that num_fixed <= argc <= num_params. | 914 // Check that exactly num_fixed arguments are passed in. |
915 Label argc_in_range; | 915 Label correct_num_arguments, wrong_num_arguments; |
916 __ movl(EAX, FieldAddress(EDX, ArgumentsDescriptor::count_offset())); | 916 __ movl(EAX, FieldAddress(EDX, ArgumentsDescriptor::count_offset())); |
917 __ cmpl(EAX, Immediate(Smi::RawValue(num_fixed_params))); | 917 __ cmpl(EAX, Immediate(Smi::RawValue(num_fixed_params))); |
918 __ j(EQUAL, &argc_in_range, Assembler::kNearJump); | 918 __ j(NOT_EQUAL, &wrong_num_arguments, Assembler::kNearJump); |
| 919 __ cmpl(EAX, |
| 920 FieldAddress(EDX, |
| 921 ArgumentsDescriptor::positional_count_offset())); |
| 922 __ j(EQUAL, &correct_num_arguments, Assembler::kNearJump); |
| 923 |
| 924 __ Bind(&wrong_num_arguments); |
919 if (function.IsClosureFunction()) { | 925 if (function.IsClosureFunction()) { |
920 if (StackSize() != 0) { | 926 if (StackSize() != 0) { |
921 // We need to unwind the space we reserved for locals and copied | 927 // We need to unwind the space we reserved for locals and copied |
922 // parameters. The NoSuchMethodFunction stub does not expect to see | 928 // parameters. The NoSuchMethodFunction stub does not expect to see |
923 // that area on the stack. | 929 // that area on the stack. |
924 __ addl(ESP, Immediate(StackSize() * kWordSize)); | 930 __ addl(ESP, Immediate(StackSize() * kWordSize)); |
925 } | 931 } |
926 // The call below has an empty stackmap because we have just | 932 // The call below has an empty stackmap because we have just |
927 // dropped the spill slots. | 933 // dropped the spill slots. |
928 BitmapBuilder* empty_stack_bitmap = new BitmapBuilder(); | 934 BitmapBuilder* empty_stack_bitmap = new BitmapBuilder(); |
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945 stackmap_table_builder_->AddEntry(assembler()->CodeSize(), | 951 stackmap_table_builder_->AddEntry(assembler()->CodeSize(), |
946 empty_stack_bitmap, | 952 empty_stack_bitmap, |
947 0); // No registers. | 953 0); // No registers. |
948 } | 954 } |
949 // The noSuchMethod call may return. | 955 // The noSuchMethod call may return. |
950 __ LeaveFrame(); | 956 __ LeaveFrame(); |
951 __ ret(); | 957 __ ret(); |
952 } else { | 958 } else { |
953 __ Stop("Wrong number of arguments"); | 959 __ Stop("Wrong number of arguments"); |
954 } | 960 } |
955 __ Bind(&argc_in_range); | 961 __ Bind(&correct_num_arguments); |
956 } | 962 } |
957 // The arguments descriptor is never saved in the absence of optional | 963 // The arguments descriptor is never saved in the absence of optional |
958 // parameters, since any argument definition test would always yield true. | 964 // parameters, since any argument definition test would always yield true. |
959 ASSERT(saved_args_desc_var == NULL); | 965 ASSERT(saved_args_desc_var == NULL); |
960 } else { | 966 } else { |
961 if (saved_args_desc_var != NULL) { | 967 if (saved_args_desc_var != NULL) { |
962 __ Comment("Save arguments descriptor"); | 968 __ Comment("Save arguments descriptor"); |
963 const Register kArgumentsDescriptorReg = EDX; | 969 const Register kArgumentsDescriptorReg = EDX; |
964 // The saved_args_desc_var is allocated one slot before the first local. | 970 // The saved_args_desc_var is allocated one slot before the first local. |
965 const intptr_t slot = parsed_function().first_stack_local_index() + 1; | 971 const intptr_t slot = parsed_function().first_stack_local_index() + 1; |
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1498 __ popl(ECX); | 1504 __ popl(ECX); |
1499 __ popl(EAX); | 1505 __ popl(EAX); |
1500 } | 1506 } |
1501 | 1507 |
1502 | 1508 |
1503 #undef __ | 1509 #undef __ |
1504 | 1510 |
1505 } // namespace dart | 1511 } // namespace dart |
1506 | 1512 |
1507 #endif // defined TARGET_ARCH_IA32 | 1513 #endif // defined TARGET_ARCH_IA32 |
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