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1 /* |
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2 * Copyright 1999-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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20 * CA 95054 USA or visit www.sun.com if you need additional information or |
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21 * have any questions. |
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22 * |
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23 */ |
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24 |
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25 #include "incls/_precompiled.incl" |
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26 #include "incls/_generateOptoStub.cpp.incl" |
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27 |
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28 //--------------------gen_stub------------------------------- |
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29 void GraphKit::gen_stub(address C_function, |
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30 const char *name, |
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31 int is_fancy_jump, |
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32 bool pass_tls, |
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33 bool return_pc) { |
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34 ResourceMark rm; |
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35 |
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36 const TypeTuple *jdomain = C->tf()->domain(); |
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37 const TypeTuple *jrange = C->tf()->range(); |
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38 |
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39 // The procedure start |
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40 StartNode* start = new (C, 2) StartNode(root(), jdomain); |
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41 _gvn.set_type_bottom(start); |
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42 |
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43 // Make a map, with JVM state |
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44 uint parm_cnt = jdomain->cnt(); |
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45 uint max_map = MAX2(2*parm_cnt+1, jrange->cnt()); |
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46 // %%% SynchronizationEntryBCI is redundant; use InvocationEntryBci in interfaces |
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47 assert(SynchronizationEntryBCI == InvocationEntryBci, ""); |
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48 JVMState* jvms = new (C) JVMState(0); |
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49 jvms->set_bci(InvocationEntryBci); |
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50 jvms->set_monoff(max_map); |
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51 jvms->set_endoff(max_map); |
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52 { |
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53 SafePointNode *map = new (C, max_map) SafePointNode( max_map, jvms ); |
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54 jvms->set_map(map); |
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55 set_jvms(jvms); |
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56 assert(map == this->map(), "kit.map is set"); |
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57 } |
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58 |
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59 // Make up the parameters |
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60 uint i; |
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61 for( i = 0; i < parm_cnt; i++ ) |
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62 map()->init_req(i, _gvn.transform(new (C, 1) ParmNode(start, i))); |
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63 for( ; i<map()->req(); i++ ) |
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64 map()->init_req(i, top()); // For nicer debugging |
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65 |
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66 // GraphKit requires memory to be a MergeMemNode: |
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67 set_all_memory(map()->memory()); |
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68 |
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69 // Get base of thread-local storage area |
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70 Node* thread = _gvn.transform( new (C, 1) ThreadLocalNode() ); |
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71 |
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72 const int NoAlias = Compile::AliasIdxBot; |
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73 |
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74 Node* adr_last_Java_pc = basic_plus_adr(top(), |
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75 thread, |
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76 in_bytes(JavaThread::frame_anchor_offset()) + |
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77 in_bytes(JavaFrameAnchor::last_Java_pc_offset())); |
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78 #if defined(SPARC) || defined(IA64) |
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79 Node* adr_flags = basic_plus_adr(top(), |
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80 thread, |
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81 in_bytes(JavaThread::frame_anchor_offset()) + |
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82 in_bytes(JavaFrameAnchor::flags_offset())); |
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83 #endif /* defined(SPARC) || defined(IA64) */ |
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84 |
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85 |
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86 // Drop in the last_Java_sp. last_Java_fp is not touched. |
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87 // Always do this after the other "last_Java_frame" fields are set since |
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88 // as soon as last_Java_sp != NULL the has_last_Java_frame is true and |
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89 // users will look at the other fields. |
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90 // |
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91 Node *adr_sp = basic_plus_adr(top(), thread, in_bytes(JavaThread::last_Java_sp_offset())); |
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92 #ifndef IA64 |
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93 Node *last_sp = basic_plus_adr(top(), frameptr(), (intptr_t) STACK_BIAS); |
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94 store_to_memory(NULL, adr_sp, last_sp, T_ADDRESS, NoAlias); |
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95 #endif |
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96 |
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97 // Set _thread_in_native |
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98 // The order of stores into TLS is critical! Setting _thread_in_native MUST |
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99 // be last, because a GC is allowed at any time after setting it and the GC |
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100 // will require last_Java_pc and last_Java_sp. |
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101 Node* adr_state = basic_plus_adr(top(), thread, in_bytes(JavaThread::thread_state_offset())); |
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102 |
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103 //----------------------------- |
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104 // Compute signature for C call. Varies from the Java signature! |
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105 const Type **fields = TypeTuple::fields(2*parm_cnt+2); |
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106 uint cnt = TypeFunc::Parms; |
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107 // The C routines gets the base of thread-local storage passed in as an |
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108 // extra argument. Not all calls need it, but its cheap to add here. |
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109 for( ; cnt<parm_cnt; cnt++ ) |
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110 fields[cnt] = jdomain->field_at(cnt); |
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111 fields[cnt++] = TypeRawPtr::BOTTOM; // Thread-local storage |
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112 // Also pass in the caller's PC, if asked for. |
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113 if( return_pc ) |
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114 fields[cnt++] = TypeRawPtr::BOTTOM; // Return PC |
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115 |
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116 const TypeTuple* domain = TypeTuple::make(cnt,fields); |
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117 // The C routine we are about to call cannot return an oop; it can block on |
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118 // exit and a GC will trash the oop while it sits in C-land. Instead, we |
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119 // return the oop through TLS for runtime calls. |
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120 // Also, C routines returning integer subword values leave the high |
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121 // order bits dirty; these must be cleaned up by explicit sign extension. |
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122 const Type* retval = (jrange->cnt() == TypeFunc::Parms) ? Type::TOP : jrange->field_at(TypeFunc::Parms); |
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123 // Make a private copy of jrange->fields(); |
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124 const Type **rfields = TypeTuple::fields(jrange->cnt() - TypeFunc::Parms); |
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125 // Fixup oop returns |
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126 int retval_ptr = retval->isa_oop_ptr(); |
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127 if( retval_ptr ) { |
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128 assert( pass_tls, "Oop must be returned thru TLS" ); |
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129 // Fancy-jumps return address; others return void |
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130 rfields[TypeFunc::Parms] = is_fancy_jump ? TypeRawPtr::BOTTOM : Type::TOP; |
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131 |
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132 } else if( retval->isa_int() ) { // Returning any integer subtype? |
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133 // "Fatten" byte, char & short return types to 'int' to show that |
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134 // the native C code can return values with junk high order bits. |
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135 // We'll sign-extend it below later. |
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136 rfields[TypeFunc::Parms] = TypeInt::INT; // It's "dirty" and needs sign-ext |
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137 |
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138 } else if( jrange->cnt() >= TypeFunc::Parms+1 ) { // Else copy other types |
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139 rfields[TypeFunc::Parms] = jrange->field_at(TypeFunc::Parms); |
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140 if( jrange->cnt() == TypeFunc::Parms+2 ) |
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141 rfields[TypeFunc::Parms+1] = jrange->field_at(TypeFunc::Parms+1); |
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142 } |
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143 const TypeTuple* range = TypeTuple::make(jrange->cnt(),rfields); |
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144 |
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145 // Final C signature |
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146 const TypeFunc *c_sig = TypeFunc::make(domain,range); |
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147 |
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148 //----------------------------- |
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149 // Make the call node |
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150 CallRuntimeNode *call = new (C, c_sig->domain()->cnt()) |
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151 CallRuntimeNode(c_sig, C_function, name, TypePtr::BOTTOM); |
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152 //----------------------------- |
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153 |
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154 // Fix-up the debug info for the call |
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155 call->set_jvms( new (C) JVMState(0) ); |
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156 call->jvms()->set_bci(0); |
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157 call->jvms()->set_offsets(cnt); |
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158 |
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159 // Set fixed predefined input arguments |
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160 cnt = 0; |
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161 for( i=0; i<TypeFunc::Parms; i++ ) |
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162 call->init_req( cnt++, map()->in(i) ); |
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163 // A little too aggressive on the parm copy; return address is not an input |
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164 call->set_req(TypeFunc::ReturnAdr, top()); |
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165 for( ; i<parm_cnt; i++ ) // Regular input arguments |
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166 call->init_req( cnt++, map()->in(i) ); |
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167 |
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168 call->init_req( cnt++, thread ); |
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169 if( return_pc ) // Return PC, if asked for |
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170 call->init_req( cnt++, returnadr() ); |
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171 _gvn.transform_no_reclaim(call); |
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172 |
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173 |
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174 //----------------------------- |
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175 // Now set up the return results |
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176 set_control( _gvn.transform( new (C, 1) ProjNode(call,TypeFunc::Control)) ); |
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177 set_i_o( _gvn.transform( new (C, 1) ProjNode(call,TypeFunc::I_O )) ); |
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178 set_all_memory_call(call); |
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179 if (range->cnt() > TypeFunc::Parms) { |
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180 Node* retnode = _gvn.transform( new (C, 1) ProjNode(call,TypeFunc::Parms) ); |
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181 // C-land is allowed to return sub-word values. Convert to integer type. |
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182 assert( retval != Type::TOP, "" ); |
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183 if (retval == TypeInt::BOOL) { |
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184 retnode = _gvn.transform( new (C, 3) AndINode(retnode, intcon(0xFF)) ); |
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185 } else if (retval == TypeInt::CHAR) { |
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186 retnode = _gvn.transform( new (C, 3) AndINode(retnode, intcon(0xFFFF)) ); |
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187 } else if (retval == TypeInt::BYTE) { |
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188 retnode = _gvn.transform( new (C, 3) LShiftINode(retnode, intcon(24)) ); |
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189 retnode = _gvn.transform( new (C, 3) RShiftINode(retnode, intcon(24)) ); |
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190 } else if (retval == TypeInt::SHORT) { |
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191 retnode = _gvn.transform( new (C, 3) LShiftINode(retnode, intcon(16)) ); |
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192 retnode = _gvn.transform( new (C, 3) RShiftINode(retnode, intcon(16)) ); |
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193 } |
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194 map()->set_req( TypeFunc::Parms, retnode ); |
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195 } |
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196 |
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197 //----------------------------- |
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198 |
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199 // Clear last_Java_sp |
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200 #ifdef IA64 |
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201 if( os::is_MP() ) insert_mem_bar(Op_MemBarRelease); |
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202 #endif |
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203 |
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204 store_to_memory(NULL, adr_sp, null(), T_ADDRESS, NoAlias); |
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205 #ifdef IA64 |
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206 if (os::is_MP() && UseMembar) insert_mem_bar(new MemBarVolatileNode()); |
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207 #endif // def IA64 |
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208 // Clear last_Java_pc and (optionally)_flags |
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209 store_to_memory(NULL, adr_last_Java_pc, null(), T_ADDRESS, NoAlias); |
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210 #if defined(SPARC) || defined(IA64) |
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211 store_to_memory(NULL, adr_flags, intcon(0), T_INT, NoAlias); |
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212 #endif /* defined(SPARC) || defined(IA64) */ |
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213 #ifdef IA64 |
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214 Node* adr_last_Java_fp = basic_plus_adr(top(), thread, in_bytes(JavaThread::last_Java_fp_offset())); |
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215 if( os::is_MP() ) insert_mem_bar(Op_MemBarRelease); |
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216 store_to_memory(NULL, adr_last_Java_fp, null(), T_ADDRESS, NoAlias); |
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217 #endif |
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218 |
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219 // For is-fancy-jump, the C-return value is also the branch target |
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220 Node* target = map()->in(TypeFunc::Parms); |
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221 // Runtime call returning oop in TLS? Fetch it out |
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222 if( pass_tls ) { |
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223 Node* adr = basic_plus_adr(top(), thread, in_bytes(JavaThread::vm_result_offset())); |
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224 Node* vm_result = make_load(NULL, adr, TypeOopPtr::BOTTOM, T_OBJECT, NoAlias, false); |
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225 map()->set_req(TypeFunc::Parms, vm_result); // vm_result passed as result |
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226 // clear thread-local-storage(tls) |
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227 store_to_memory(NULL, adr, null(), T_ADDRESS, NoAlias); |
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228 } |
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229 |
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230 //----------------------------- |
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231 // check exception |
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232 Node* adr = basic_plus_adr(top(), thread, in_bytes(Thread::pending_exception_offset())); |
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233 Node* pending = make_load(NULL, adr, TypeOopPtr::BOTTOM, T_OBJECT, NoAlias, false); |
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234 |
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235 Node* exit_memory = reset_memory(); |
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236 |
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237 Node* cmp = _gvn.transform( new (C, 3) CmpPNode(pending, null()) ); |
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238 Node* bo = _gvn.transform( new (C, 2) BoolNode(cmp, BoolTest::ne) ); |
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239 IfNode *iff = create_and_map_if(control(), bo, PROB_MIN, COUNT_UNKNOWN); |
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240 |
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241 Node* if_null = _gvn.transform( new (C, 1) IfFalseNode(iff) ); |
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242 Node* if_not_null = _gvn.transform( new (C, 1) IfTrueNode(iff) ); |
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243 |
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244 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); |
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245 Node *exc_target = makecon(TypeRawPtr::make( StubRoutines::forward_exception_entry() )); |
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246 Node *to_exc = new (C, TypeFunc::Parms+2) TailCallNode(if_not_null, |
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247 i_o(), |
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248 exit_memory, |
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249 frameptr(), |
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250 returnadr(), |
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251 exc_target, null()); |
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252 root()->add_req(_gvn.transform(to_exc)); // bind to root to keep live |
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253 C->init_start(start); |
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254 |
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255 //----------------------------- |
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256 // If this is a normal subroutine return, issue the return and be done. |
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257 Node *ret; |
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258 switch( is_fancy_jump ) { |
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259 case 0: // Make a return instruction |
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260 // Return to caller, free any space for return address |
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261 ret = new (C, TypeFunc::Parms) ReturnNode(TypeFunc::Parms, if_null, |
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262 i_o(), |
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263 exit_memory, |
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264 frameptr(), |
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265 returnadr()); |
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266 if (C->tf()->range()->cnt() > TypeFunc::Parms) |
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267 ret->add_req( map()->in(TypeFunc::Parms) ); |
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268 break; |
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269 case 1: // This is a fancy tail-call jump. Jump to computed address. |
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270 // Jump to new callee; leave old return address alone. |
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271 ret = new (C, TypeFunc::Parms+2) TailCallNode(if_null, |
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272 i_o(), |
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273 exit_memory, |
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274 frameptr(), |
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275 returnadr(), |
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276 target, map()->in(TypeFunc::Parms)); |
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277 break; |
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278 case 2: // Pop return address & jump |
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279 // Throw away old return address; jump to new computed address |
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280 //assert(C_function == CAST_FROM_FN_PTR(address, OptoRuntime::rethrow_C), "fancy_jump==2 only for rethrow"); |
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281 ret = new (C, TypeFunc::Parms+2) TailJumpNode(if_null, |
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282 i_o(), |
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283 exit_memory, |
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284 frameptr(), |
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285 target, map()->in(TypeFunc::Parms)); |
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286 break; |
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287 default: |
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288 ShouldNotReachHere(); |
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289 } |
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290 root()->add_req(_gvn.transform(ret)); |
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291 } |