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1 /* |
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2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #include "precompiled.hpp" |
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26 #include "opto/addnode.hpp" |
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27 #include "opto/callnode.hpp" |
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28 #include "opto/cfgnode.hpp" |
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29 #include "opto/compile.hpp" |
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30 #include "opto/connode.hpp" |
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31 #include "opto/locknode.hpp" |
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32 #include "opto/memnode.hpp" |
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33 #include "opto/mulnode.hpp" |
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34 #include "opto/node.hpp" |
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35 #include "opto/parse.hpp" |
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36 #include "opto/phaseX.hpp" |
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37 #include "opto/rootnode.hpp" |
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38 #include "opto/runtime.hpp" |
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39 #include "opto/type.hpp" |
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40 |
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41 //--------------------gen_stub------------------------------- |
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42 void GraphKit::gen_stub(address C_function, |
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43 const char *name, |
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44 int is_fancy_jump, |
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45 bool pass_tls, |
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46 bool return_pc) { |
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47 ResourceMark rm; |
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48 |
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49 const TypeTuple *jdomain = C->tf()->domain(); |
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50 const TypeTuple *jrange = C->tf()->range(); |
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51 |
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52 // The procedure start |
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53 StartNode* start = new (C) StartNode(root(), jdomain); |
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54 _gvn.set_type_bottom(start); |
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55 |
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56 // Make a map, with JVM state |
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57 uint parm_cnt = jdomain->cnt(); |
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58 uint max_map = MAX2(2*parm_cnt+1, jrange->cnt()); |
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59 // %%% SynchronizationEntryBCI is redundant; use InvocationEntryBci in interfaces |
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60 assert(SynchronizationEntryBCI == InvocationEntryBci, ""); |
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61 JVMState* jvms = new (C) JVMState(0); |
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62 jvms->set_bci(InvocationEntryBci); |
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63 jvms->set_monoff(max_map); |
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64 jvms->set_scloff(max_map); |
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65 jvms->set_endoff(max_map); |
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66 { |
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67 SafePointNode *map = new (C) SafePointNode( max_map, jvms ); |
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68 jvms->set_map(map); |
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69 set_jvms(jvms); |
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70 assert(map == this->map(), "kit.map is set"); |
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71 } |
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72 |
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73 // Make up the parameters |
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74 uint i; |
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75 for( i = 0; i < parm_cnt; i++ ) |
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76 map()->init_req(i, _gvn.transform(new (C) ParmNode(start, i))); |
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77 for( ; i<map()->req(); i++ ) |
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78 map()->init_req(i, top()); // For nicer debugging |
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79 |
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80 // GraphKit requires memory to be a MergeMemNode: |
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81 set_all_memory(map()->memory()); |
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82 |
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83 // Get base of thread-local storage area |
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84 Node* thread = _gvn.transform( new (C) ThreadLocalNode() ); |
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85 |
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86 const int NoAlias = Compile::AliasIdxBot; |
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87 |
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88 Node* adr_last_Java_pc = basic_plus_adr(top(), |
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89 thread, |
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90 in_bytes(JavaThread::frame_anchor_offset()) + |
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91 in_bytes(JavaFrameAnchor::last_Java_pc_offset())); |
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92 #if defined(SPARC) |
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93 Node* adr_flags = basic_plus_adr(top(), |
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94 thread, |
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95 in_bytes(JavaThread::frame_anchor_offset()) + |
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96 in_bytes(JavaFrameAnchor::flags_offset())); |
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97 #endif /* defined(SPARC) */ |
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98 |
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99 |
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100 // Drop in the last_Java_sp. last_Java_fp is not touched. |
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101 // Always do this after the other "last_Java_frame" fields are set since |
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102 // as soon as last_Java_sp != NULL the has_last_Java_frame is true and |
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103 // users will look at the other fields. |
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104 // |
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105 Node *adr_sp = basic_plus_adr(top(), thread, in_bytes(JavaThread::last_Java_sp_offset())); |
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106 Node *last_sp = basic_plus_adr(top(), frameptr(), (intptr_t) STACK_BIAS); |
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107 store_to_memory(NULL, adr_sp, last_sp, T_ADDRESS, NoAlias, MemNode::unordered); |
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108 |
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109 // Set _thread_in_native |
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110 // The order of stores into TLS is critical! Setting _thread_in_native MUST |
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111 // be last, because a GC is allowed at any time after setting it and the GC |
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112 // will require last_Java_pc and last_Java_sp. |
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113 |
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114 //----------------------------- |
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115 // Compute signature for C call. Varies from the Java signature! |
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116 const Type **fields = TypeTuple::fields(2*parm_cnt+2); |
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117 uint cnt = TypeFunc::Parms; |
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118 // The C routines gets the base of thread-local storage passed in as an |
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119 // extra argument. Not all calls need it, but its cheap to add here. |
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120 for (uint pcnt = cnt; pcnt < parm_cnt; pcnt++, cnt++) { |
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121 // Convert ints to longs if required. |
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122 if (CCallingConventionRequiresIntsAsLongs && jdomain->field_at(pcnt)->isa_int()) { |
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123 fields[cnt++] = TypeLong::LONG; |
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124 fields[cnt] = Type::HALF; // must add an additional half for a long |
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125 } else { |
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126 fields[cnt] = jdomain->field_at(pcnt); |
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127 } |
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128 } |
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129 |
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130 fields[cnt++] = TypeRawPtr::BOTTOM; // Thread-local storage |
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131 // Also pass in the caller's PC, if asked for. |
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132 if( return_pc ) |
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133 fields[cnt++] = TypeRawPtr::BOTTOM; // Return PC |
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134 |
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135 const TypeTuple* domain = TypeTuple::make(cnt,fields); |
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136 // The C routine we are about to call cannot return an oop; it can block on |
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137 // exit and a GC will trash the oop while it sits in C-land. Instead, we |
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138 // return the oop through TLS for runtime calls. |
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139 // Also, C routines returning integer subword values leave the high |
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140 // order bits dirty; these must be cleaned up by explicit sign extension. |
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141 const Type* retval = (jrange->cnt() == TypeFunc::Parms) ? Type::TOP : jrange->field_at(TypeFunc::Parms); |
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142 // Make a private copy of jrange->fields(); |
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143 const Type **rfields = TypeTuple::fields(jrange->cnt() - TypeFunc::Parms); |
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144 // Fixup oop returns |
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145 int retval_ptr = retval->isa_oop_ptr(); |
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146 if( retval_ptr ) { |
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147 assert( pass_tls, "Oop must be returned thru TLS" ); |
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148 // Fancy-jumps return address; others return void |
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149 rfields[TypeFunc::Parms] = is_fancy_jump ? TypeRawPtr::BOTTOM : Type::TOP; |
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150 |
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151 } else if( retval->isa_int() ) { // Returning any integer subtype? |
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152 // "Fatten" byte, char & short return types to 'int' to show that |
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153 // the native C code can return values with junk high order bits. |
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154 // We'll sign-extend it below later. |
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155 rfields[TypeFunc::Parms] = TypeInt::INT; // It's "dirty" and needs sign-ext |
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156 |
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157 } else if( jrange->cnt() >= TypeFunc::Parms+1 ) { // Else copy other types |
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158 rfields[TypeFunc::Parms] = jrange->field_at(TypeFunc::Parms); |
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159 if( jrange->cnt() == TypeFunc::Parms+2 ) |
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160 rfields[TypeFunc::Parms+1] = jrange->field_at(TypeFunc::Parms+1); |
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161 } |
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162 const TypeTuple* range = TypeTuple::make(jrange->cnt(),rfields); |
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163 |
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164 // Final C signature |
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165 const TypeFunc *c_sig = TypeFunc::make(domain,range); |
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166 |
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167 //----------------------------- |
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168 // Make the call node |
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169 CallRuntimeNode *call = new (C) |
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170 CallRuntimeNode(c_sig, C_function, name, TypePtr::BOTTOM); |
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171 //----------------------------- |
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172 |
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173 // Fix-up the debug info for the call |
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174 call->set_jvms( new (C) JVMState(0) ); |
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175 call->jvms()->set_bci(0); |
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176 call->jvms()->set_offsets(cnt); |
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177 |
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178 // Set fixed predefined input arguments |
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179 cnt = 0; |
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180 for (i = 0; i < TypeFunc::Parms; i++) |
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181 call->init_req(cnt++, map()->in(i)); |
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182 // A little too aggressive on the parm copy; return address is not an input |
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183 call->set_req(TypeFunc::ReturnAdr, top()); |
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184 for (; i < parm_cnt; i++) { // Regular input arguments |
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185 // Convert ints to longs if required. |
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186 if (CCallingConventionRequiresIntsAsLongs && jdomain->field_at(i)->isa_int()) { |
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187 Node* int_as_long = _gvn.transform(new (C) ConvI2LNode(map()->in(i))); |
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188 call->init_req(cnt++, int_as_long); // long |
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189 call->init_req(cnt++, top()); // half |
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190 } else { |
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191 call->init_req(cnt++, map()->in(i)); |
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192 } |
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193 } |
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194 |
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195 call->init_req( cnt++, thread ); |
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196 if( return_pc ) // Return PC, if asked for |
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197 call->init_req( cnt++, returnadr() ); |
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198 _gvn.transform_no_reclaim(call); |
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199 |
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200 |
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201 //----------------------------- |
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202 // Now set up the return results |
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203 set_control( _gvn.transform( new (C) ProjNode(call,TypeFunc::Control)) ); |
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204 set_i_o( _gvn.transform( new (C) ProjNode(call,TypeFunc::I_O )) ); |
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205 set_all_memory_call(call); |
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206 if (range->cnt() > TypeFunc::Parms) { |
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207 Node* retnode = _gvn.transform( new (C) ProjNode(call,TypeFunc::Parms) ); |
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208 // C-land is allowed to return sub-word values. Convert to integer type. |
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209 assert( retval != Type::TOP, "" ); |
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210 if (retval == TypeInt::BOOL) { |
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211 retnode = _gvn.transform( new (C) AndINode(retnode, intcon(0xFF)) ); |
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212 } else if (retval == TypeInt::CHAR) { |
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213 retnode = _gvn.transform( new (C) AndINode(retnode, intcon(0xFFFF)) ); |
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214 } else if (retval == TypeInt::BYTE) { |
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215 retnode = _gvn.transform( new (C) LShiftINode(retnode, intcon(24)) ); |
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216 retnode = _gvn.transform( new (C) RShiftINode(retnode, intcon(24)) ); |
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217 } else if (retval == TypeInt::SHORT) { |
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218 retnode = _gvn.transform( new (C) LShiftINode(retnode, intcon(16)) ); |
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219 retnode = _gvn.transform( new (C) RShiftINode(retnode, intcon(16)) ); |
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220 } |
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221 map()->set_req( TypeFunc::Parms, retnode ); |
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222 } |
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223 |
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224 //----------------------------- |
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225 |
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226 // Clear last_Java_sp |
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227 store_to_memory(NULL, adr_sp, null(), T_ADDRESS, NoAlias, MemNode::unordered); |
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228 // Clear last_Java_pc and (optionally)_flags |
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229 store_to_memory(NULL, adr_last_Java_pc, null(), T_ADDRESS, NoAlias, MemNode::unordered); |
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230 #if defined(SPARC) |
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231 store_to_memory(NULL, adr_flags, intcon(0), T_INT, NoAlias, MemNode::unordered); |
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232 #endif /* defined(SPARC) */ |
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233 #if (defined(IA64) && !defined(AIX)) |
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234 Node* adr_last_Java_fp = basic_plus_adr(top(), thread, in_bytes(JavaThread::last_Java_fp_offset())); |
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235 store_to_memory(NULL, adr_last_Java_fp, null(), T_ADDRESS, NoAlias, MemNode::unordered); |
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236 #endif |
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237 |
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238 // For is-fancy-jump, the C-return value is also the branch target |
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239 Node* target = map()->in(TypeFunc::Parms); |
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240 // Runtime call returning oop in TLS? Fetch it out |
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241 if( pass_tls ) { |
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242 Node* adr = basic_plus_adr(top(), thread, in_bytes(JavaThread::vm_result_offset())); |
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243 Node* vm_result = make_load(NULL, adr, TypeOopPtr::BOTTOM, T_OBJECT, NoAlias, MemNode::unordered); |
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244 map()->set_req(TypeFunc::Parms, vm_result); // vm_result passed as result |
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245 // clear thread-local-storage(tls) |
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246 store_to_memory(NULL, adr, null(), T_ADDRESS, NoAlias, MemNode::unordered); |
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247 } |
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248 |
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249 //----------------------------- |
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250 // check exception |
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251 Node* adr = basic_plus_adr(top(), thread, in_bytes(Thread::pending_exception_offset())); |
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252 Node* pending = make_load(NULL, adr, TypeOopPtr::BOTTOM, T_OBJECT, NoAlias, MemNode::unordered); |
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253 |
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254 Node* exit_memory = reset_memory(); |
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255 |
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256 Node* cmp = _gvn.transform( new (C) CmpPNode(pending, null()) ); |
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257 Node* bo = _gvn.transform( new (C) BoolNode(cmp, BoolTest::ne) ); |
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258 IfNode *iff = create_and_map_if(control(), bo, PROB_MIN, COUNT_UNKNOWN); |
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259 |
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260 Node* if_null = _gvn.transform( new (C) IfFalseNode(iff) ); |
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261 Node* if_not_null = _gvn.transform( new (C) IfTrueNode(iff) ); |
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262 |
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263 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); |
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264 Node *exc_target = makecon(TypeRawPtr::make( StubRoutines::forward_exception_entry() )); |
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265 Node *to_exc = new (C) TailCallNode(if_not_null, |
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266 i_o(), |
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267 exit_memory, |
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268 frameptr(), |
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269 returnadr(), |
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270 exc_target, null()); |
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271 root()->add_req(_gvn.transform(to_exc)); // bind to root to keep live |
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272 C->init_start(start); |
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273 |
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274 //----------------------------- |
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275 // If this is a normal subroutine return, issue the return and be done. |
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276 Node *ret; |
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277 switch( is_fancy_jump ) { |
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278 case 0: // Make a return instruction |
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279 // Return to caller, free any space for return address |
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280 ret = new (C) ReturnNode(TypeFunc::Parms, if_null, |
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281 i_o(), |
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282 exit_memory, |
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283 frameptr(), |
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284 returnadr()); |
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285 if (C->tf()->range()->cnt() > TypeFunc::Parms) |
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286 ret->add_req( map()->in(TypeFunc::Parms) ); |
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287 break; |
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288 case 1: // This is a fancy tail-call jump. Jump to computed address. |
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289 // Jump to new callee; leave old return address alone. |
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290 ret = new (C) TailCallNode(if_null, |
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291 i_o(), |
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292 exit_memory, |
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293 frameptr(), |
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294 returnadr(), |
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295 target, map()->in(TypeFunc::Parms)); |
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296 break; |
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297 case 2: // Pop return address & jump |
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298 // Throw away old return address; jump to new computed address |
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299 //assert(C_function == CAST_FROM_FN_PTR(address, OptoRuntime::rethrow_C), "fancy_jump==2 only for rethrow"); |
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300 ret = new (C) TailJumpNode(if_null, |
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301 i_o(), |
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302 exit_memory, |
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303 frameptr(), |
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304 target, map()->in(TypeFunc::Parms)); |
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305 break; |
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306 default: |
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307 ShouldNotReachHere(); |
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308 } |
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309 root()->add_req(_gvn.transform(ret)); |
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310 } |