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Issue 6811012: Remove some dead code. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 9 years, 8 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 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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23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 27
28 #include "v8.h" 28 #include "v8.h"
29 29
30 #if defined(V8_TARGET_ARCH_IA32) 30 #if defined(V8_TARGET_ARCH_IA32)
31 31
32 #include "code-stubs.h" 32 #include "code-stubs.h"
33 #include "codegen-inl.h" 33 #include "codegen.h"
34 #include "compiler.h" 34 #include "compiler.h"
35 #include "debug.h" 35 #include "debug.h"
36 #include "full-codegen.h" 36 #include "full-codegen.h"
37 #include "parser.h" 37 #include "parser.h"
38 #include "scopes.h" 38 #include "scopes.h"
39 #include "stub-cache.h" 39 #include "stub-cache.h"
40 40
41 namespace v8 { 41 namespace v8 {
42 namespace internal { 42 namespace internal {
43 43
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766 VisitForStackValue(stmt->tag()); 766 VisitForStackValue(stmt->tag());
767 PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS); 767 PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);
768 768
769 ZoneList<CaseClause*>* clauses = stmt->cases(); 769 ZoneList<CaseClause*>* clauses = stmt->cases();
770 CaseClause* default_clause = NULL; // Can occur anywhere in the list. 770 CaseClause* default_clause = NULL; // Can occur anywhere in the list.
771 771
772 Label next_test; // Recycled for each test. 772 Label next_test; // Recycled for each test.
773 // Compile all the tests with branches to their bodies. 773 // Compile all the tests with branches to their bodies.
774 for (int i = 0; i < clauses->length(); i++) { 774 for (int i = 0; i < clauses->length(); i++) {
775 CaseClause* clause = clauses->at(i); 775 CaseClause* clause = clauses->at(i);
776 clause->body_target()->entry_label()->Unuse(); 776 clause->body_target()->Unuse();
777 777
778 // The default is not a test, but remember it as final fall through. 778 // The default is not a test, but remember it as final fall through.
779 if (clause->is_default()) { 779 if (clause->is_default()) {
780 default_clause = clause; 780 default_clause = clause;
781 continue; 781 continue;
782 } 782 }
783 783
784 Comment cmnt(masm_, "[ Case comparison"); 784 Comment cmnt(masm_, "[ Case comparison");
785 __ bind(&next_test); 785 __ bind(&next_test);
786 next_test.Unuse(); 786 next_test.Unuse();
787 787
788 // Compile the label expression. 788 // Compile the label expression.
789 VisitForAccumulatorValue(clause->label()); 789 VisitForAccumulatorValue(clause->label());
790 790
791 // Perform the comparison as if via '==='. 791 // Perform the comparison as if via '==='.
792 __ mov(edx, Operand(esp, 0)); // Switch value. 792 __ mov(edx, Operand(esp, 0)); // Switch value.
793 bool inline_smi_code = ShouldInlineSmiCase(Token::EQ_STRICT); 793 bool inline_smi_code = ShouldInlineSmiCase(Token::EQ_STRICT);
794 JumpPatchSite patch_site(masm_); 794 JumpPatchSite patch_site(masm_);
795 if (inline_smi_code) { 795 if (inline_smi_code) {
796 NearLabel slow_case; 796 NearLabel slow_case;
797 __ mov(ecx, edx); 797 __ mov(ecx, edx);
798 __ or_(ecx, Operand(eax)); 798 __ or_(ecx, Operand(eax));
799 patch_site.EmitJumpIfNotSmi(ecx, &slow_case); 799 patch_site.EmitJumpIfNotSmi(ecx, &slow_case);
800 800
801 __ cmp(edx, Operand(eax)); 801 __ cmp(edx, Operand(eax));
802 __ j(not_equal, &next_test); 802 __ j(not_equal, &next_test);
803 __ Drop(1); // Switch value is no longer needed. 803 __ Drop(1); // Switch value is no longer needed.
804 __ jmp(clause->body_target()->entry_label()); 804 __ jmp(clause->body_target());
805 __ bind(&slow_case); 805 __ bind(&slow_case);
806 } 806 }
807 807
808 // Record position before stub call for type feedback. 808 // Record position before stub call for type feedback.
809 SetSourcePosition(clause->position()); 809 SetSourcePosition(clause->position());
810 Handle<Code> ic = CompareIC::GetUninitialized(Token::EQ_STRICT); 810 Handle<Code> ic = CompareIC::GetUninitialized(Token::EQ_STRICT);
811 EmitCallIC(ic, &patch_site); 811 EmitCallIC(ic, &patch_site);
812 __ test(eax, Operand(eax)); 812 __ test(eax, Operand(eax));
813 __ j(not_equal, &next_test); 813 __ j(not_equal, &next_test);
814 __ Drop(1); // Switch value is no longer needed. 814 __ Drop(1); // Switch value is no longer needed.
815 __ jmp(clause->body_target()->entry_label()); 815 __ jmp(clause->body_target());
816 } 816 }
817 817
818 // Discard the test value and jump to the default if present, otherwise to 818 // Discard the test value and jump to the default if present, otherwise to
819 // the end of the statement. 819 // the end of the statement.
820 __ bind(&next_test); 820 __ bind(&next_test);
821 __ Drop(1); // Switch value is no longer needed. 821 __ Drop(1); // Switch value is no longer needed.
822 if (default_clause == NULL) { 822 if (default_clause == NULL) {
823 __ jmp(nested_statement.break_target()); 823 __ jmp(nested_statement.break_target());
824 } else { 824 } else {
825 __ jmp(default_clause->body_target()->entry_label()); 825 __ jmp(default_clause->body_target());
826 } 826 }
827 827
828 // Compile all the case bodies. 828 // Compile all the case bodies.
829 for (int i = 0; i < clauses->length(); i++) { 829 for (int i = 0; i < clauses->length(); i++) {
830 Comment cmnt(masm_, "[ Case body"); 830 Comment cmnt(masm_, "[ Case body");
831 CaseClause* clause = clauses->at(i); 831 CaseClause* clause = clauses->at(i);
832 __ bind(clause->body_target()->entry_label()); 832 __ bind(clause->body_target());
833 PrepareForBailoutForId(clause->EntryId(), NO_REGISTERS); 833 PrepareForBailoutForId(clause->EntryId(), NO_REGISTERS);
834 VisitStatements(clause->statements()); 834 VisitStatements(clause->statements());
835 } 835 }
836 836
837 __ bind(nested_statement.break_target()); 837 __ bind(nested_statement.break_target());
838 PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS); 838 PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS);
839 } 839 }
840 840
841 841
842 void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) { 842 void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
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4348 // And return. 4348 // And return.
4349 __ ret(0); 4349 __ ret(0);
4350 } 4350 }
4351 4351
4352 4352
4353 #undef __ 4353 #undef __
4354 4354
4355 } } // namespace v8::internal 4355 } } // namespace v8::internal
4356 4356
4357 #endif // V8_TARGET_ARCH_IA32 4357 #endif // V8_TARGET_ARCH_IA32
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