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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/instruction-selector.h" | 5 #include "src/compiler/instruction-selector.h" |
6 | 6 |
7 #include "src/compiler/instruction-selector-impl.h" | 7 #include "src/compiler/instruction-selector-impl.h" |
8 #include "src/compiler/node-matchers.h" | 8 #include "src/compiler/node-matchers.h" |
9 #include "src/compiler/node-properties-inl.h" | 9 #include "src/compiler/node-properties-inl.h" |
10 #include "src/compiler/pipeline.h" | 10 #include "src/compiler/pipeline.h" |
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600 return VisitConstant(node); | 600 return VisitConstant(node); |
601 case IrOpcode::kFloat32Constant: | 601 case IrOpcode::kFloat32Constant: |
602 return MarkAsDouble(node), VisitConstant(node); | 602 return MarkAsDouble(node), VisitConstant(node); |
603 case IrOpcode::kFloat64Constant: | 603 case IrOpcode::kFloat64Constant: |
604 return MarkAsDouble(node), VisitConstant(node); | 604 return MarkAsDouble(node), VisitConstant(node); |
605 case IrOpcode::kHeapConstant: | 605 case IrOpcode::kHeapConstant: |
606 case IrOpcode::kNumberConstant: | 606 case IrOpcode::kNumberConstant: |
607 // TODO(turbofan): only mark non-smis as references. | 607 // TODO(turbofan): only mark non-smis as references. |
608 return MarkAsReference(node), VisitConstant(node); | 608 return MarkAsReference(node), VisitConstant(node); |
609 case IrOpcode::kCall: | 609 case IrOpcode::kCall: |
610 return VisitCall(node, NULL, NULL); | 610 return VisitCall(node); |
611 case IrOpcode::kFrameState: | 611 case IrOpcode::kFrameState: |
612 case IrOpcode::kStateValues: | 612 case IrOpcode::kStateValues: |
613 return; | 613 return; |
614 case IrOpcode::kLoad: { | 614 case IrOpcode::kLoad: { |
615 LoadRepresentation rep = OpParameter<LoadRepresentation>(node); | 615 LoadRepresentation rep = OpParameter<LoadRepresentation>(node); |
616 MarkAsRepresentation(rep, node); | 616 MarkAsRepresentation(rep, node); |
617 return VisitLoad(node); | 617 return VisitLoad(node); |
618 } | 618 } |
619 case IrOpcode::kStore: | 619 case IrOpcode::kStore: |
620 return VisitStore(node); | 620 return VisitStore(node); |
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738 return VisitLoadStackPointer(node); | 738 return VisitLoadStackPointer(node); |
739 default: | 739 default: |
740 V8_Fatal(__FILE__, __LINE__, "Unexpected operator #%d:%s @ node #%d", | 740 V8_Fatal(__FILE__, __LINE__, "Unexpected operator #%d:%s @ node #%d", |
741 node->opcode(), node->op()->mnemonic(), node->id()); | 741 node->opcode(), node->op()->mnemonic(), node->id()); |
742 } | 742 } |
743 } | 743 } |
744 | 744 |
745 | 745 |
746 #if V8_TURBOFAN_BACKEND | 746 #if V8_TURBOFAN_BACKEND |
747 | 747 |
748 void InstructionSelector::VisitWord32Equal(Node* node) { | |
749 FlagsContinuation cont(kEqual, node); | |
750 Int32BinopMatcher m(node); | |
751 if (m.right().Is(0)) { | |
752 return VisitWord32Test(m.left().node(), &cont); | |
753 } | |
754 VisitWord32Compare(node, &cont); | |
755 } | |
756 | |
757 | |
758 void InstructionSelector::VisitInt32LessThan(Node* node) { | |
759 FlagsContinuation cont(kSignedLessThan, node); | |
760 VisitWord32Compare(node, &cont); | |
761 } | |
762 | |
763 | |
764 void InstructionSelector::VisitInt32LessThanOrEqual(Node* node) { | |
765 FlagsContinuation cont(kSignedLessThanOrEqual, node); | |
766 VisitWord32Compare(node, &cont); | |
767 } | |
768 | |
769 | |
770 void InstructionSelector::VisitUint32LessThan(Node* node) { | |
771 FlagsContinuation cont(kUnsignedLessThan, node); | |
772 VisitWord32Compare(node, &cont); | |
773 } | |
774 | |
775 | |
776 void InstructionSelector::VisitUint32LessThanOrEqual(Node* node) { | |
777 FlagsContinuation cont(kUnsignedLessThanOrEqual, node); | |
778 VisitWord32Compare(node, &cont); | |
779 } | |
780 | |
781 | |
782 void InstructionSelector::VisitWord64Equal(Node* node) { | |
783 FlagsContinuation cont(kEqual, node); | |
784 Int64BinopMatcher m(node); | |
785 if (m.right().Is(0)) { | |
786 return VisitWord64Test(m.left().node(), &cont); | |
787 } | |
788 VisitWord64Compare(node, &cont); | |
789 } | |
790 | |
791 | |
792 void InstructionSelector::VisitInt32AddWithOverflow(Node* node) { | |
793 if (Node* ovf = node->FindProjection(1)) { | |
794 FlagsContinuation cont(kOverflow, ovf); | |
795 return VisitInt32AddWithOverflow(node, &cont); | |
796 } | |
797 FlagsContinuation cont; | |
798 VisitInt32AddWithOverflow(node, &cont); | |
799 } | |
800 | |
801 | |
802 void InstructionSelector::VisitInt32SubWithOverflow(Node* node) { | |
803 if (Node* ovf = node->FindProjection(1)) { | |
804 FlagsContinuation cont(kOverflow, ovf); | |
805 return VisitInt32SubWithOverflow(node, &cont); | |
806 } | |
807 FlagsContinuation cont; | |
808 VisitInt32SubWithOverflow(node, &cont); | |
809 } | |
810 | |
811 | |
812 void InstructionSelector::VisitInt64LessThan(Node* node) { | |
813 FlagsContinuation cont(kSignedLessThan, node); | |
814 VisitWord64Compare(node, &cont); | |
815 } | |
816 | |
817 | |
818 void InstructionSelector::VisitInt64LessThanOrEqual(Node* node) { | |
819 FlagsContinuation cont(kSignedLessThanOrEqual, node); | |
820 VisitWord64Compare(node, &cont); | |
821 } | |
822 | |
823 | |
824 void InstructionSelector::VisitUint64LessThan(Node* node) { | |
825 FlagsContinuation cont(kUnsignedLessThan, node); | |
826 VisitWord64Compare(node, &cont); | |
827 } | |
828 | |
829 | |
830 void InstructionSelector::VisitTruncateFloat64ToInt32(Node* node) { | 748 void InstructionSelector::VisitTruncateFloat64ToInt32(Node* node) { |
831 OperandGenerator g(this); | 749 OperandGenerator g(this); |
832 Emit(kArchTruncateDoubleToI, g.DefineAsRegister(node), | 750 Emit(kArchTruncateDoubleToI, g.DefineAsRegister(node), |
833 g.UseRegister(node->InputAt(0))); | 751 g.UseRegister(node->InputAt(0))); |
834 } | 752 } |
835 | 753 |
836 | 754 |
837 void InstructionSelector::VisitFloat64Equal(Node* node) { | |
838 FlagsContinuation cont(kUnorderedEqual, node); | |
839 VisitFloat64Compare(node, &cont); | |
840 } | |
841 | |
842 | |
843 void InstructionSelector::VisitFloat64LessThan(Node* node) { | |
844 FlagsContinuation cont(kUnorderedLessThan, node); | |
845 VisitFloat64Compare(node, &cont); | |
846 } | |
847 | |
848 | |
849 void InstructionSelector::VisitFloat64LessThanOrEqual(Node* node) { | |
850 FlagsContinuation cont(kUnorderedLessThanOrEqual, node); | |
851 VisitFloat64Compare(node, &cont); | |
852 } | |
853 | |
854 | |
855 void InstructionSelector::VisitLoadStackPointer(Node* node) { | 755 void InstructionSelector::VisitLoadStackPointer(Node* node) { |
856 OperandGenerator g(this); | 756 OperandGenerator g(this); |
857 Emit(kArchStackPointer, g.DefineAsRegister(node)); | 757 Emit(kArchStackPointer, g.DefineAsRegister(node)); |
858 } | 758 } |
859 | 759 |
860 #endif // V8_TURBOFAN_BACKEND | 760 #endif // V8_TURBOFAN_BACKEND |
861 | 761 |
862 // 32 bit targets do not implement the following instructions. | 762 // 32 bit targets do not implement the following instructions. |
863 #if V8_TARGET_ARCH_32_BIT && V8_TURBOFAN_BACKEND | 763 #if V8_TARGET_ARCH_32_BIT && V8_TURBOFAN_BACKEND |
864 | 764 |
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876 | 776 |
877 void InstructionSelector::VisitWord64Shr(Node* node) { UNIMPLEMENTED(); } | 777 void InstructionSelector::VisitWord64Shr(Node* node) { UNIMPLEMENTED(); } |
878 | 778 |
879 | 779 |
880 void InstructionSelector::VisitWord64Sar(Node* node) { UNIMPLEMENTED(); } | 780 void InstructionSelector::VisitWord64Sar(Node* node) { UNIMPLEMENTED(); } |
881 | 781 |
882 | 782 |
883 void InstructionSelector::VisitWord64Ror(Node* node) { UNIMPLEMENTED(); } | 783 void InstructionSelector::VisitWord64Ror(Node* node) { UNIMPLEMENTED(); } |
884 | 784 |
885 | 785 |
| 786 void InstructionSelector::VisitWord64Equal(Node* node) { UNIMPLEMENTED(); } |
| 787 |
| 788 |
886 void InstructionSelector::VisitInt64Add(Node* node) { UNIMPLEMENTED(); } | 789 void InstructionSelector::VisitInt64Add(Node* node) { UNIMPLEMENTED(); } |
887 | 790 |
888 | 791 |
889 void InstructionSelector::VisitInt64Sub(Node* node) { UNIMPLEMENTED(); } | 792 void InstructionSelector::VisitInt64Sub(Node* node) { UNIMPLEMENTED(); } |
890 | 793 |
891 | 794 |
892 void InstructionSelector::VisitInt64Mul(Node* node) { UNIMPLEMENTED(); } | 795 void InstructionSelector::VisitInt64Mul(Node* node) { UNIMPLEMENTED(); } |
893 | 796 |
894 | 797 |
895 void InstructionSelector::VisitInt64Div(Node* node) { UNIMPLEMENTED(); } | 798 void InstructionSelector::VisitInt64Div(Node* node) { UNIMPLEMENTED(); } |
896 | 799 |
897 | 800 |
| 801 void InstructionSelector::VisitInt64LessThan(Node* node) { UNIMPLEMENTED(); } |
| 802 |
| 803 |
| 804 void InstructionSelector::VisitInt64LessThanOrEqual(Node* node) { |
| 805 UNIMPLEMENTED(); |
| 806 } |
| 807 |
| 808 |
898 void InstructionSelector::VisitUint64Div(Node* node) { UNIMPLEMENTED(); } | 809 void InstructionSelector::VisitUint64Div(Node* node) { UNIMPLEMENTED(); } |
899 | 810 |
900 | 811 |
901 void InstructionSelector::VisitInt64Mod(Node* node) { UNIMPLEMENTED(); } | 812 void InstructionSelector::VisitInt64Mod(Node* node) { UNIMPLEMENTED(); } |
902 | 813 |
903 | 814 |
| 815 void InstructionSelector::VisitUint64LessThan(Node* node) { UNIMPLEMENTED(); } |
| 816 |
| 817 |
904 void InstructionSelector::VisitUint64Mod(Node* node) { UNIMPLEMENTED(); } | 818 void InstructionSelector::VisitUint64Mod(Node* node) { UNIMPLEMENTED(); } |
905 | 819 |
906 | 820 |
907 void InstructionSelector::VisitChangeInt32ToInt64(Node* node) { | 821 void InstructionSelector::VisitChangeInt32ToInt64(Node* node) { |
908 UNIMPLEMENTED(); | 822 UNIMPLEMENTED(); |
909 } | 823 } |
910 | 824 |
911 | 825 |
912 void InstructionSelector::VisitChangeUint32ToUint64(Node* node) { | 826 void InstructionSelector::VisitChangeUint32ToUint64(Node* node) { |
913 UNIMPLEMENTED(); | 827 UNIMPLEMENTED(); |
914 } | 828 } |
915 | 829 |
916 | 830 |
917 void InstructionSelector::VisitTruncateInt64ToInt32(Node* node) { | 831 void InstructionSelector::VisitTruncateInt64ToInt32(Node* node) { |
918 UNIMPLEMENTED(); | 832 UNIMPLEMENTED(); |
919 } | 833 } |
920 | 834 |
921 #endif // V8_TARGET_ARCH_32_BIT && V8_TURBOFAN_BACKEND | 835 #endif // V8_TARGET_ARCH_32_BIT && V8_TURBOFAN_BACKEND |
922 | 836 |
923 | 837 |
924 // 32-bit targets and unsupported architectures need dummy implementations of | |
925 // selected 64-bit ops. | |
926 #if V8_TARGET_ARCH_32_BIT || !V8_TURBOFAN_BACKEND | |
927 | |
928 void InstructionSelector::VisitWord64Test(Node* node, FlagsContinuation* cont) { | |
929 UNIMPLEMENTED(); | |
930 } | |
931 | |
932 | |
933 void InstructionSelector::VisitWord64Compare(Node* node, | |
934 FlagsContinuation* cont) { | |
935 UNIMPLEMENTED(); | |
936 } | |
937 | |
938 #endif // V8_TARGET_ARCH_32_BIT || !V8_TURBOFAN_BACKEND | |
939 | |
940 | |
941 void InstructionSelector::VisitFinish(Node* node) { | 838 void InstructionSelector::VisitFinish(Node* node) { |
942 OperandGenerator g(this); | 839 OperandGenerator g(this); |
943 Node* value = node->InputAt(0); | 840 Node* value = node->InputAt(0); |
944 Emit(kArchNop, g.DefineSameAsFirst(node), g.Use(value)); | 841 Emit(kArchNop, g.DefineSameAsFirst(node), g.Use(value)); |
945 } | 842 } |
946 | 843 |
947 | 844 |
948 void InstructionSelector::VisitParameter(Node* node) { | 845 void InstructionSelector::VisitParameter(Node* node) { |
949 OperandGenerator g(this); | 846 OperandGenerator g(this); |
950 int index = OpParameter<int>(node); | 847 int index = OpParameter<int>(node); |
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994 // fall through to the next block. | 891 // fall through to the next block. |
995 Emit(kArchNop, NULL)->MarkAsControl(); | 892 Emit(kArchNop, NULL)->MarkAsControl(); |
996 } else { | 893 } else { |
997 // jump to the next block. | 894 // jump to the next block. |
998 OperandGenerator g(this); | 895 OperandGenerator g(this); |
999 Emit(kArchJmp, NULL, g.Label(target))->MarkAsControl(); | 896 Emit(kArchJmp, NULL, g.Label(target))->MarkAsControl(); |
1000 } | 897 } |
1001 } | 898 } |
1002 | 899 |
1003 | 900 |
1004 void InstructionSelector::VisitBranch(Node* branch, BasicBlock* tbranch, | |
1005 BasicBlock* fbranch) { | |
1006 OperandGenerator g(this); | |
1007 Node* user = branch; | |
1008 Node* value = branch->InputAt(0); | |
1009 | |
1010 FlagsContinuation cont(kNotEqual, tbranch, fbranch); | |
1011 | |
1012 // If we can fall through to the true block, invert the branch. | |
1013 if (IsNextInAssemblyOrder(tbranch)) { | |
1014 cont.Negate(); | |
1015 cont.SwapBlocks(); | |
1016 } | |
1017 | |
1018 // Try to combine with comparisons against 0 by simply inverting the branch. | |
1019 while (CanCover(user, value)) { | |
1020 if (value->opcode() == IrOpcode::kWord32Equal) { | |
1021 Int32BinopMatcher m(value); | |
1022 if (m.right().Is(0)) { | |
1023 user = value; | |
1024 value = m.left().node(); | |
1025 cont.Negate(); | |
1026 } else { | |
1027 break; | |
1028 } | |
1029 } else if (value->opcode() == IrOpcode::kWord64Equal) { | |
1030 Int64BinopMatcher m(value); | |
1031 if (m.right().Is(0)) { | |
1032 user = value; | |
1033 value = m.left().node(); | |
1034 cont.Negate(); | |
1035 } else { | |
1036 break; | |
1037 } | |
1038 } else { | |
1039 break; | |
1040 } | |
1041 } | |
1042 | |
1043 // Try to combine the branch with a comparison. | |
1044 if (CanCover(user, value)) { | |
1045 switch (value->opcode()) { | |
1046 case IrOpcode::kWord32Equal: | |
1047 cont.OverwriteAndNegateIfEqual(kEqual); | |
1048 return VisitWord32Compare(value, &cont); | |
1049 case IrOpcode::kInt32LessThan: | |
1050 cont.OverwriteAndNegateIfEqual(kSignedLessThan); | |
1051 return VisitWord32Compare(value, &cont); | |
1052 case IrOpcode::kInt32LessThanOrEqual: | |
1053 cont.OverwriteAndNegateIfEqual(kSignedLessThanOrEqual); | |
1054 return VisitWord32Compare(value, &cont); | |
1055 case IrOpcode::kUint32LessThan: | |
1056 cont.OverwriteAndNegateIfEqual(kUnsignedLessThan); | |
1057 return VisitWord32Compare(value, &cont); | |
1058 case IrOpcode::kUint32LessThanOrEqual: | |
1059 cont.OverwriteAndNegateIfEqual(kUnsignedLessThanOrEqual); | |
1060 return VisitWord32Compare(value, &cont); | |
1061 case IrOpcode::kWord64Equal: | |
1062 cont.OverwriteAndNegateIfEqual(kEqual); | |
1063 return VisitWord64Compare(value, &cont); | |
1064 case IrOpcode::kInt64LessThan: | |
1065 cont.OverwriteAndNegateIfEqual(kSignedLessThan); | |
1066 return VisitWord64Compare(value, &cont); | |
1067 case IrOpcode::kInt64LessThanOrEqual: | |
1068 cont.OverwriteAndNegateIfEqual(kSignedLessThanOrEqual); | |
1069 return VisitWord64Compare(value, &cont); | |
1070 case IrOpcode::kUint64LessThan: | |
1071 cont.OverwriteAndNegateIfEqual(kUnsignedLessThan); | |
1072 return VisitWord64Compare(value, &cont); | |
1073 case IrOpcode::kFloat64Equal: | |
1074 cont.OverwriteAndNegateIfEqual(kUnorderedEqual); | |
1075 return VisitFloat64Compare(value, &cont); | |
1076 case IrOpcode::kFloat64LessThan: | |
1077 cont.OverwriteAndNegateIfEqual(kUnorderedLessThan); | |
1078 return VisitFloat64Compare(value, &cont); | |
1079 case IrOpcode::kFloat64LessThanOrEqual: | |
1080 cont.OverwriteAndNegateIfEqual(kUnorderedLessThanOrEqual); | |
1081 return VisitFloat64Compare(value, &cont); | |
1082 case IrOpcode::kProjection: | |
1083 // Check if this is the overflow output projection of an | |
1084 // <Operation>WithOverflow node. | |
1085 if (OpParameter<size_t>(value) == 1u) { | |
1086 // We cannot combine the <Operation>WithOverflow with this branch | |
1087 // unless the 0th projection (the use of the actual value of the | |
1088 // <Operation> is either NULL, which means there's no use of the | |
1089 // actual value, or was already defined, which means it is scheduled | |
1090 // *AFTER* this branch). | |
1091 Node* node = value->InputAt(0); | |
1092 Node* result = node->FindProjection(0); | |
1093 if (result == NULL || IsDefined(result)) { | |
1094 switch (node->opcode()) { | |
1095 case IrOpcode::kInt32AddWithOverflow: | |
1096 cont.OverwriteAndNegateIfEqual(kOverflow); | |
1097 return VisitInt32AddWithOverflow(node, &cont); | |
1098 case IrOpcode::kInt32SubWithOverflow: | |
1099 cont.OverwriteAndNegateIfEqual(kOverflow); | |
1100 return VisitInt32SubWithOverflow(node, &cont); | |
1101 default: | |
1102 break; | |
1103 } | |
1104 } | |
1105 } | |
1106 break; | |
1107 default: | |
1108 break; | |
1109 } | |
1110 } | |
1111 | |
1112 // Branch could not be combined with a compare, emit compare against 0. | |
1113 VisitWord32Test(value, &cont); | |
1114 } | |
1115 | |
1116 | |
1117 void InstructionSelector::VisitReturn(Node* value) { | 901 void InstructionSelector::VisitReturn(Node* value) { |
1118 OperandGenerator g(this); | 902 OperandGenerator g(this); |
1119 if (value != NULL) { | 903 if (value != NULL) { |
1120 Emit(kArchRet, NULL, g.UseLocation(value, linkage()->GetReturnLocation(), | 904 Emit(kArchRet, NULL, g.UseLocation(value, linkage()->GetReturnLocation(), |
1121 linkage()->GetReturnType())); | 905 linkage()->GetReturnType())); |
1122 } else { | 906 } else { |
1123 Emit(kArchRet, NULL); | 907 Emit(kArchRet, NULL); |
1124 } | 908 } |
1125 } | 909 } |
1126 | 910 |
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1227 | 1011 |
1228 | 1012 |
1229 #if !V8_TURBOFAN_BACKEND | 1013 #if !V8_TURBOFAN_BACKEND |
1230 | 1014 |
1231 #define DECLARE_UNIMPLEMENTED_SELECTOR(x) \ | 1015 #define DECLARE_UNIMPLEMENTED_SELECTOR(x) \ |
1232 void InstructionSelector::Visit##x(Node* node) { UNIMPLEMENTED(); } | 1016 void InstructionSelector::Visit##x(Node* node) { UNIMPLEMENTED(); } |
1233 MACHINE_OP_LIST(DECLARE_UNIMPLEMENTED_SELECTOR) | 1017 MACHINE_OP_LIST(DECLARE_UNIMPLEMENTED_SELECTOR) |
1234 #undef DECLARE_UNIMPLEMENTED_SELECTOR | 1018 #undef DECLARE_UNIMPLEMENTED_SELECTOR |
1235 | 1019 |
1236 | 1020 |
1237 void InstructionSelector::VisitInt32AddWithOverflow(Node* node, | 1021 void InstructionSelector::VisitCall(Node* node) { UNIMPLEMENTED(); } |
1238 FlagsContinuation* cont) { | |
1239 UNIMPLEMENTED(); | |
1240 } | |
1241 | |
1242 | |
1243 void InstructionSelector::VisitInt32SubWithOverflow(Node* node, | |
1244 FlagsContinuation* cont) { | |
1245 UNIMPLEMENTED(); | |
1246 } | |
1247 | |
1248 | |
1249 void InstructionSelector::VisitWord32Test(Node* node, FlagsContinuation* cont) { | |
1250 UNIMPLEMENTED(); | |
1251 } | |
1252 | |
1253 | |
1254 void InstructionSelector::VisitWord32Compare(Node* node, | |
1255 FlagsContinuation* cont) { | |
1256 UNIMPLEMENTED(); | |
1257 } | |
1258 | |
1259 | |
1260 void InstructionSelector::VisitFloat64Compare(Node* node, | |
1261 FlagsContinuation* cont) { | |
1262 UNIMPLEMENTED(); | |
1263 } | |
1264 | |
1265 | |
1266 void InstructionSelector::VisitCall(Node* call, BasicBlock* continuation, | |
1267 BasicBlock* deoptimization) {} | |
1268 | 1022 |
1269 #endif // !V8_TURBOFAN_BACKEND | 1023 #endif // !V8_TURBOFAN_BACKEND |
1270 | 1024 |
1271 } // namespace compiler | 1025 } // namespace compiler |
1272 } // namespace internal | 1026 } // namespace internal |
1273 } // namespace v8 | 1027 } // namespace v8 |
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