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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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 #if V8_TARGET_ARCH_IA32 | 5 #if V8_TARGET_ARCH_IA32 |
6 | 6 |
7 #include "src/code-factory.h" | 7 #include "src/code-factory.h" |
8 #include "src/codegen.h" | 8 #include "src/codegen.h" |
9 #include "src/deoptimizer.h" | 9 #include "src/deoptimizer.h" |
10 #include "src/full-codegen/full-codegen.h" | 10 #include "src/full-codegen/full-codegen.h" |
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1879 // | f()'s receiver arg | 1879 // | f()'s receiver arg |
1880 // | f()'s caller pc <- sp | 1880 // | f()'s caller pc <- sp |
1881 // ---------------------- | 1881 // ---------------------- |
1882 // | 1882 // |
1883 void PrepareForTailCall(MacroAssembler* masm, Register args_reg, | 1883 void PrepareForTailCall(MacroAssembler* masm, Register args_reg, |
1884 Register scratch1, Register scratch2, | 1884 Register scratch1, Register scratch2, |
1885 Register scratch3) { | 1885 Register scratch3) { |
1886 DCHECK(!AreAliased(args_reg, scratch1, scratch2, scratch3)); | 1886 DCHECK(!AreAliased(args_reg, scratch1, scratch2, scratch3)); |
1887 Comment cmnt(masm, "[ PrepareForTailCall"); | 1887 Comment cmnt(masm, "[ PrepareForTailCall"); |
1888 | 1888 |
| 1889 // Prepare for tail call only if ES2015 tail call elimination is enabled. |
| 1890 Label done; |
| 1891 ExternalReference is_tail_call_elimination_enabled = |
| 1892 ExternalReference::is_tail_call_elimination_enabled_address( |
| 1893 masm->isolate()); |
| 1894 __ movzx_b(scratch1, |
| 1895 Operand::StaticVariable(is_tail_call_elimination_enabled)); |
| 1896 __ cmp(scratch1, Immediate(0)); |
| 1897 __ j(equal, &done, Label::kNear); |
| 1898 |
1889 // Drop possible interpreter handler/stub frame. | 1899 // Drop possible interpreter handler/stub frame. |
1890 { | 1900 { |
1891 Label no_interpreter_frame; | 1901 Label no_interpreter_frame; |
1892 __ cmp(Operand(ebp, CommonFrameConstants::kContextOrFrameTypeOffset), | 1902 __ cmp(Operand(ebp, CommonFrameConstants::kContextOrFrameTypeOffset), |
1893 Immediate(Smi::FromInt(StackFrame::STUB))); | 1903 Immediate(Smi::FromInt(StackFrame::STUB))); |
1894 __ j(not_equal, &no_interpreter_frame, Label::kNear); | 1904 __ j(not_equal, &no_interpreter_frame, Label::kNear); |
1895 __ mov(ebp, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); | 1905 __ mov(ebp, Operand(ebp, StandardFrameConstants::kCallerFPOffset)); |
1896 __ bind(&no_interpreter_frame); | 1906 __ bind(&no_interpreter_frame); |
1897 } | 1907 } |
1898 | 1908 |
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1919 __ mov( | 1929 __ mov( |
1920 caller_args_count_reg, | 1930 caller_args_count_reg, |
1921 FieldOperand(scratch1, SharedFunctionInfo::kFormalParameterCountOffset)); | 1931 FieldOperand(scratch1, SharedFunctionInfo::kFormalParameterCountOffset)); |
1922 __ SmiUntag(caller_args_count_reg); | 1932 __ SmiUntag(caller_args_count_reg); |
1923 | 1933 |
1924 __ bind(&formal_parameter_count_loaded); | 1934 __ bind(&formal_parameter_count_loaded); |
1925 | 1935 |
1926 ParameterCount callee_args_count(args_reg); | 1936 ParameterCount callee_args_count(args_reg); |
1927 __ PrepareForTailCall(callee_args_count, caller_args_count_reg, scratch2, | 1937 __ PrepareForTailCall(callee_args_count, caller_args_count_reg, scratch2, |
1928 scratch3, ReturnAddressState::kOnStack, 0); | 1938 scratch3, ReturnAddressState::kOnStack, 0); |
| 1939 __ bind(&done); |
1929 } | 1940 } |
1930 } // namespace | 1941 } // namespace |
1931 | 1942 |
1932 // static | 1943 // static |
1933 void Builtins::Generate_CallFunction(MacroAssembler* masm, | 1944 void Builtins::Generate_CallFunction(MacroAssembler* masm, |
1934 ConvertReceiverMode mode, | 1945 ConvertReceiverMode mode, |
1935 TailCallMode tail_call_mode) { | 1946 TailCallMode tail_call_mode) { |
1936 // ----------- S t a t e ------------- | 1947 // ----------- S t a t e ------------- |
1937 // -- eax : the number of arguments (not including the receiver) | 1948 // -- eax : the number of arguments (not including the receiver) |
1938 // -- edi : the function to call (checked to be a JSFunction) | 1949 // -- edi : the function to call (checked to be a JSFunction) |
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2600 // And "return" to the OSR entry point of the function. | 2611 // And "return" to the OSR entry point of the function. |
2601 __ ret(0); | 2612 __ ret(0); |
2602 } | 2613 } |
2603 | 2614 |
2604 | 2615 |
2605 #undef __ | 2616 #undef __ |
2606 } // namespace internal | 2617 } // namespace internal |
2607 } // namespace v8 | 2618 } // namespace v8 |
2608 | 2619 |
2609 #endif // V8_TARGET_ARCH_IA32 | 2620 #endif // V8_TARGET_ARCH_IA32 |
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