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1692
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1 /*
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2 * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 2008, 2009, 2010 Red Hat, Inc.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 *
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24 */
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25
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26 #include "incls/_precompiled.incl"
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27 #include "incls/_sharkBuilder.cpp.incl"
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28
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29 using namespace llvm;
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30
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31 SharkBuilder::SharkBuilder(SharkCodeBuffer* code_buffer)
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32 : IRBuilder<>(SharkContext::current()),
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33 _code_buffer(code_buffer) {
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34 }
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35
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36 // Helpers for accessing structures
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37 Value* SharkBuilder::CreateAddressOfStructEntry(Value* base,
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38 ByteSize offset,
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39 const Type* type,
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40 const char* name) {
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41 return CreateBitCast(CreateStructGEP(base, in_bytes(offset)), type, name);
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42 }
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43
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44 LoadInst* SharkBuilder::CreateValueOfStructEntry(Value* base,
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45 ByteSize offset,
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46 const Type* type,
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47 const char* name) {
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48 return CreateLoad(
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49 CreateAddressOfStructEntry(
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50 base, offset, PointerType::getUnqual(type)),
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51 name);
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52 }
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53
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54 // Helpers for accessing arrays
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55
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56 LoadInst* SharkBuilder::CreateArrayLength(Value* arrayoop) {
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57 return CreateValueOfStructEntry(
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58 arrayoop, in_ByteSize(arrayOopDesc::length_offset_in_bytes()),
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59 SharkType::jint_type(), "length");
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60 }
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61
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62 Value* SharkBuilder::CreateArrayAddress(Value* arrayoop,
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63 const Type* element_type,
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64 int element_bytes,
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65 ByteSize base_offset,
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66 Value* index,
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67 const char* name) {
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68 Value* offset = CreateIntCast(index, SharkType::intptr_type(), false);
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69 if (element_bytes != 1)
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70 offset = CreateShl(
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71 offset,
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72 LLVMValue::intptr_constant(exact_log2(element_bytes)));
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73 offset = CreateAdd(
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74 LLVMValue::intptr_constant(in_bytes(base_offset)), offset);
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75
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76 return CreateIntToPtr(
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77 CreateAdd(CreatePtrToInt(arrayoop, SharkType::intptr_type()), offset),
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78 PointerType::getUnqual(element_type),
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79 name);
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80 }
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81
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82 Value* SharkBuilder::CreateArrayAddress(Value* arrayoop,
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83 BasicType basic_type,
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84 ByteSize base_offset,
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85 Value* index,
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86 const char* name) {
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87 return CreateArrayAddress(
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88 arrayoop,
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89 SharkType::to_arrayType(basic_type),
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90 type2aelembytes(basic_type),
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91 base_offset, index, name);
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92 }
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93
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94 Value* SharkBuilder::CreateArrayAddress(Value* arrayoop,
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95 BasicType basic_type,
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96 Value* index,
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97 const char* name) {
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98 return CreateArrayAddress(
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99 arrayoop, basic_type,
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100 in_ByteSize(arrayOopDesc::base_offset_in_bytes(basic_type)),
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101 index, name);
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102 }
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103
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104 // Helpers for creating intrinsics and external functions.
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105
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106 const Type* SharkBuilder::make_type(char type, bool void_ok) {
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107 switch (type) {
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108 // Primitive types
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109 case 'c':
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110 return SharkType::jbyte_type();
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111 case 'i':
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112 return SharkType::jint_type();
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113 case 'l':
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114 return SharkType::jlong_type();
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115 case 'x':
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116 return SharkType::intptr_type();
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117 case 'f':
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118 return SharkType::jfloat_type();
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119 case 'd':
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120 return SharkType::jdouble_type();
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121
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122 // Pointers to primitive types
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123 case 'C':
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124 case 'I':
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125 case 'L':
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126 case 'X':
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127 case 'F':
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128 case 'D':
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129 return PointerType::getUnqual(make_type(tolower(type), false));
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130
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131 // VM objects
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132 case 'T':
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133 return SharkType::thread_type();
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134 case 'M':
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135 return PointerType::getUnqual(SharkType::monitor_type());
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136 case 'O':
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137 return SharkType::oop_type();
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138
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139 // Miscellaneous
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140 case 'v':
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141 assert(void_ok, "should be");
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142 return SharkType::void_type();
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143 case '1':
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144 return SharkType::bit_type();
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145
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146 default:
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147 ShouldNotReachHere();
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148 }
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149 }
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150
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151 const FunctionType* SharkBuilder::make_ftype(const char* params,
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152 const char* ret) {
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153 std::vector<const Type*> param_types;
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154 for (const char* c = params; *c; c++)
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155 param_types.push_back(make_type(*c, false));
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156
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157 assert(strlen(ret) == 1, "should be");
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158 const Type *return_type = make_type(*ret, true);
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159
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160 return FunctionType::get(return_type, param_types, false);
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161 }
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162
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163 // Create an object representing an intrinsic or external function by
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164 // referencing the symbol by name. This is the LLVM-style approach,
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165 // but it cannot be used on functions within libjvm.so its symbols
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166 // are not exported. Note that you cannot make this work simply by
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167 // exporting the symbols, as some symbols have the same names as
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168 // symbols in the standard libraries (eg, atan2, fabs) and would
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169 // obscure them were they visible.
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170 Value* SharkBuilder::make_function(const char* name,
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171 const char* params,
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172 const char* ret) {
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173 return SharkContext::current().get_external(name, make_ftype(params, ret));
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174 }
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175
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176 // Create an object representing an external function by inlining a
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177 // function pointer in the code. This is not the LLVM way, but it's
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178 // the only way to access functions in libjvm.so and functions like
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179 // __kernel_dmb on ARM which is accessed via an absolute address.
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180 Value* SharkBuilder::make_function(address func,
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181 const char* params,
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182 const char* ret) {
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183 return CreateIntToPtr(
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184 LLVMValue::intptr_constant((intptr_t) func),
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185 PointerType::getUnqual(make_ftype(params, ret)));
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186 }
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187
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188 // VM calls
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189
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190 Value* SharkBuilder::find_exception_handler() {
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191 return make_function(
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192 (address) SharkRuntime::find_exception_handler, "TIi", "i");
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193 }
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194
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195 Value* SharkBuilder::monitorenter() {
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196 return make_function((address) SharkRuntime::monitorenter, "TM", "v");
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197 }
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198
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199 Value* SharkBuilder::monitorexit() {
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200 return make_function((address) SharkRuntime::monitorexit, "TM", "v");
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201 }
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202
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203 Value* SharkBuilder::new_instance() {
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204 return make_function((address) SharkRuntime::new_instance, "Ti", "v");
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205 }
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206
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207 Value* SharkBuilder::newarray() {
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208 return make_function((address) SharkRuntime::newarray, "Tii", "v");
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209 }
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210
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211 Value* SharkBuilder::anewarray() {
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212 return make_function((address) SharkRuntime::anewarray, "Tii", "v");
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213 }
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214
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215 Value* SharkBuilder::multianewarray() {
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216 return make_function((address) SharkRuntime::multianewarray, "TiiI", "v");
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217 }
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218
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219 Value* SharkBuilder::register_finalizer() {
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220 return make_function((address) SharkRuntime::register_finalizer, "TO", "v");
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221 }
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222
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223 Value* SharkBuilder::safepoint() {
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224 return make_function((address) SafepointSynchronize::block, "T", "v");
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225 }
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226
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227 Value* SharkBuilder::throw_ArithmeticException() {
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228 return make_function(
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229 (address) SharkRuntime::throw_ArithmeticException, "TCi", "v");
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230 }
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231
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232 Value* SharkBuilder::throw_ArrayIndexOutOfBoundsException() {
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233 return make_function(
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234 (address) SharkRuntime::throw_ArrayIndexOutOfBoundsException, "TCii", "v");
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235 }
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236
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237 Value* SharkBuilder::throw_ClassCastException() {
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238 return make_function(
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239 (address) SharkRuntime::throw_ClassCastException, "TCi", "v");
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240 }
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241
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242 Value* SharkBuilder::throw_NullPointerException() {
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243 return make_function(
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244 (address) SharkRuntime::throw_NullPointerException, "TCi", "v");
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245 }
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246
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247 // High-level non-VM calls
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248
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249 Value* SharkBuilder::f2i() {
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250 return make_function((address) SharedRuntime::f2i, "f", "i");
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251 }
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252
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253 Value* SharkBuilder::f2l() {
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254 return make_function((address) SharedRuntime::f2l, "f", "l");
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255 }
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256
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257 Value* SharkBuilder::d2i() {
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258 return make_function((address) SharedRuntime::d2i, "d", "i");
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259 }
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260
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261 Value* SharkBuilder::d2l() {
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262 return make_function((address) SharedRuntime::d2l, "d", "l");
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263 }
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264
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265 Value* SharkBuilder::is_subtype_of() {
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266 return make_function((address) SharkRuntime::is_subtype_of, "OO", "c");
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267 }
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268
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269 Value* SharkBuilder::current_time_millis() {
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270 return make_function((address) os::javaTimeMillis, "", "l");
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271 }
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272
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273 Value* SharkBuilder::sin() {
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274 return make_function("llvm.sin.f64", "d", "d");
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275 }
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276
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277 Value* SharkBuilder::cos() {
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278 return make_function("llvm.cos.f64", "d", "d");
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279 }
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280
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281 Value* SharkBuilder::tan() {
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282 return make_function((address) ::tan, "d", "d");
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283 }
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284
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285 Value* SharkBuilder::atan2() {
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286 return make_function((address) ::atan2, "dd", "d");
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287 }
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288
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289 Value* SharkBuilder::sqrt() {
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290 return make_function("llvm.sqrt.f64", "d", "d");
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291 }
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292
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293 Value* SharkBuilder::log() {
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294 return make_function("llvm.log.f64", "d", "d");
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295 }
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296
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297 Value* SharkBuilder::log10() {
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298 return make_function("llvm.log10.f64", "d", "d");
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299 }
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300
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301 Value* SharkBuilder::pow() {
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302 return make_function("llvm.pow.f64", "dd", "d");
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303 }
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304
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305 Value* SharkBuilder::exp() {
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306 return make_function("llvm.exp.f64", "d", "d");
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307 }
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308
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309 Value* SharkBuilder::fabs() {
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310 return make_function((address) ::fabs, "d", "d");
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311 }
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312
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313 Value* SharkBuilder::unsafe_field_offset_to_byte_offset() {
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314 extern jlong Unsafe_field_offset_to_byte_offset(jlong field_offset);
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315 return make_function((address) Unsafe_field_offset_to_byte_offset, "l", "l");
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316 }
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317
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318 Value* SharkBuilder::osr_migration_end() {
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319 return make_function((address) SharedRuntime::OSR_migration_end, "C", "v");
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320 }
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321
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322 // Semi-VM calls
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323
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324 Value* SharkBuilder::throw_StackOverflowError() {
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325 return make_function((address) ZeroStack::handle_overflow, "T", "v");
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326 }
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327
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328 Value* SharkBuilder::uncommon_trap() {
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329 return make_function((address) SharkRuntime::uncommon_trap, "Ti", "i");
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330 }
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331
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332 Value* SharkBuilder::deoptimized_entry_point() {
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333 return make_function((address) CppInterpreter::main_loop, "iT", "v");
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334 }
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335
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336 // Native-Java transition
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337
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338 Value* SharkBuilder::check_special_condition_for_native_trans() {
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339 return make_function(
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340 (address) JavaThread::check_special_condition_for_native_trans,
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341 "T", "v");
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342 }
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343
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344 // Low-level non-VM calls
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345
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346 // The ARM-specific code here is to work around unimplemented
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347 // atomic exchange and memory barrier intrinsics in LLVM.
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348 //
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349 // Delegating to external functions for these would normally
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350 // incur a speed penalty, but Linux on ARM is a special case
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351 // in that atomic operations on that platform are handled by
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352 // external functions anyway. It would be *preferable* for
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353 // the calls to be hidden away in LLVM, but it's not hurting
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354 // performance so having the calls here is acceptable.
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355 //
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356 // If you are building Shark on a platform without atomic
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357 // exchange and/or memory barrier intrinsics then it is only
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358 // acceptable to mimic this approach if your platform cannot
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359 // perform these operations without delegating to a function.
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360
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361 #ifdef ARM
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362 static jint zero_cmpxchg_int(volatile jint *ptr, jint oldval, jint newval) {
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363 return Atomic::cmpxchg(newval, ptr, oldval);
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364 }
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365 #endif // ARM
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366
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367 Value* SharkBuilder::cmpxchg_int() {
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368 return make_function(
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369 #ifdef ARM
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370 (address) zero_cmpxchg_int,
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371 #else
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372 "llvm.atomic.cmp.swap.i32.p0i32",
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373 #endif // ARM
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374 "Iii", "i");
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375 }
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376
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377 #ifdef ARM
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378 static intptr_t zero_cmpxchg_ptr(volatile intptr_t* ptr,
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379 intptr_t oldval,
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380 intptr_t newval) {
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381 return Atomic::cmpxchg_ptr(newval, ptr, oldval);
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382 }
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383 #endif // ARM
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384
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385 Value* SharkBuilder::cmpxchg_ptr() {
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386 return make_function(
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387 #ifdef ARM
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388 (address) zero_cmpxchg_ptr,
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389 #else
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390 "llvm.atomic.cmp.swap.i" LP64_ONLY("64") NOT_LP64("32") ".p0i" LP64_ONLY("64") NOT_LP64("32"),
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391 #endif // ARM
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392 "Xxx", "x");
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393 }
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394
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395 Value* SharkBuilder::frame_address() {
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396 return make_function("llvm.frameaddress", "i", "C");
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397 }
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398
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399 Value* SharkBuilder::memory_barrier() {
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400 return make_function(
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401 #ifdef ARM
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402 (address) 0xffff0fa0, // __kernel_dmb
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403 #else
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404 "llvm.memory.barrier",
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405 #endif // ARM
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406 "11111", "v");
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407 }
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408
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409 Value* SharkBuilder::memset() {
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410 #if SHARK_LLVM_VERSION >= 28
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411 // LLVM 2.8 added a fifth isVolatile field for memset
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412 // introduced with LLVM r100304
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413 return make_function("llvm.memset.i32", "Cciii", "v");
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414 #else
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415 return make_function("llvm.memset.i32", "Ccii", "v");
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416 #endif
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417 }
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418
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419 Value* SharkBuilder::unimplemented() {
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420 return make_function((address) report_unimplemented, "Ci", "v");
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421 }
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422
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423 Value* SharkBuilder::should_not_reach_here() {
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424 return make_function((address) report_should_not_reach_here, "Ci", "v");
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425 }
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426
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427 Value* SharkBuilder::dump() {
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428 return make_function((address) SharkRuntime::dump, "Cx", "v");
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429 }
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430
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431 // Public interface to low-level non-VM calls
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432
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433 CallInst* SharkBuilder::CreateCmpxchgInt(Value* exchange_value,
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434 Value* dst,
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435 Value* compare_value) {
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436 return CreateCall3(cmpxchg_int(), dst, compare_value, exchange_value);
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437 }
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438
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439 CallInst* SharkBuilder::CreateCmpxchgPtr(Value* exchange_value,
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440 Value* dst,
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441 Value* compare_value) {
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442 return CreateCall3(cmpxchg_ptr(), dst, compare_value, exchange_value);
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443 }
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444
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445 CallInst* SharkBuilder::CreateGetFrameAddress() {
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446 return CreateCall(frame_address(), LLVMValue::jint_constant(0));
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447 }
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448
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449 CallInst *SharkBuilder::CreateMemoryBarrier(int flags) {
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450 Value *args[] = {
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451 LLVMValue::bit_constant((flags & BARRIER_LOADLOAD) ? 1 : 0),
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452 LLVMValue::bit_constant((flags & BARRIER_LOADSTORE) ? 1 : 0),
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453 LLVMValue::bit_constant((flags & BARRIER_STORELOAD) ? 1 : 0),
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454 LLVMValue::bit_constant((flags & BARRIER_STORESTORE) ? 1 : 0),
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455 LLVMValue::bit_constant(1)};
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456
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457 return CreateCall(memory_barrier(), args, args + 5);
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458 }
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459
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460 CallInst* SharkBuilder::CreateMemset(Value* dst,
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461 Value* value,
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462 Value* len,
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463 Value* align) {
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464 #if SHARK_LLVM_VERSION >= 28
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465 return CreateCall5(memset(), dst, value, len, align,
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466 LLVMValue::jint_constant(0));
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467 #else
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468 return CreateCall4(memset(), dst, value, len, align);
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469 #endif
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470 }
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471
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472 CallInst* SharkBuilder::CreateUnimplemented(const char* file, int line) {
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473 return CreateCall2(
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474 unimplemented(),
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475 CreateIntToPtr(
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476 LLVMValue::intptr_constant((intptr_t) file),
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477 PointerType::getUnqual(SharkType::jbyte_type())),
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478 LLVMValue::jint_constant(line));
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|
|
479 }
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|
|
480
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481 CallInst* SharkBuilder::CreateShouldNotReachHere(const char* file, int line) {
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482 return CreateCall2(
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483 should_not_reach_here(),
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484 CreateIntToPtr(
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485 LLVMValue::intptr_constant((intptr_t) file),
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486 PointerType::getUnqual(SharkType::jbyte_type())),
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|
|
487 LLVMValue::jint_constant(line));
|
|
|
488 }
|
|
|
489
|
|
|
490 #ifndef PRODUCT
|
|
|
491 CallInst* SharkBuilder::CreateDump(Value* value) {
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|
|
492 const char *name;
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|
|
493 if (value->hasName())
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|
|
494 // XXX this leaks, but it's only debug code
|
|
|
495 name = strdup(value->getName().str().c_str());
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|
|
496 else
|
|
|
497 name = "unnamed_value";
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|
|
498
|
|
|
499 if (isa<PointerType>(value->getType()))
|
|
|
500 value = CreatePtrToInt(value, SharkType::intptr_type());
|
|
|
501 else if (value->getType()->
|
|
|
502 #if SHARK_LLVM_VERSION >= 27
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|
|
503 isIntegerTy()
|
|
|
504 #else
|
|
|
505 isInteger()
|
|
|
506 #endif
|
|
|
507 )
|
|
|
508 value = CreateIntCast(value, SharkType::intptr_type(), false);
|
|
|
509 else
|
|
|
510 Unimplemented();
|
|
|
511
|
|
|
512 return CreateCall2(
|
|
|
513 dump(),
|
|
|
514 CreateIntToPtr(
|
|
|
515 LLVMValue::intptr_constant((intptr_t) name),
|
|
|
516 PointerType::getUnqual(SharkType::jbyte_type())),
|
|
|
517 value);
|
|
|
518 }
|
|
|
519 #endif // PRODUCT
|
|
|
520
|
|
|
521 // HotSpot memory barriers
|
|
|
522
|
|
|
523 void SharkBuilder::CreateUpdateBarrierSet(BarrierSet* bs, Value* field) {
|
|
|
524 if (bs->kind() != BarrierSet::CardTableModRef)
|
|
|
525 Unimplemented();
|
|
|
526
|
|
|
527 CreateStore(
|
|
|
528 LLVMValue::jbyte_constant(CardTableModRefBS::dirty_card),
|
|
|
529 CreateIntToPtr(
|
|
|
530 CreateAdd(
|
|
|
531 LLVMValue::intptr_constant(
|
|
|
532 (intptr_t) ((CardTableModRefBS *) bs)->byte_map_base),
|
|
|
533 CreateLShr(
|
|
|
534 CreatePtrToInt(field, SharkType::intptr_type()),
|
|
|
535 LLVMValue::intptr_constant(CardTableModRefBS::card_shift))),
|
|
|
536 PointerType::getUnqual(SharkType::jbyte_type())));
|
|
|
537 }
|
|
|
538
|
|
|
539 // Helpers for accessing the code buffer
|
|
|
540
|
|
|
541 Value* SharkBuilder::code_buffer_address(int offset) {
|
|
|
542 return CreateAdd(
|
|
|
543 code_buffer()->base_pc(),
|
|
|
544 LLVMValue::intptr_constant(offset));
|
|
|
545 }
|
|
|
546
|
|
|
547 Value* SharkBuilder::CreateInlineOop(jobject object, const char* name) {
|
|
|
548 return CreateLoad(
|
|
|
549 CreateIntToPtr(
|
|
|
550 code_buffer_address(code_buffer()->inline_oop(object)),
|
|
|
551 PointerType::getUnqual(SharkType::oop_type())),
|
|
|
552 name);
|
|
|
553 }
|
|
|
554
|
|
|
555 Value* SharkBuilder::CreateInlineData(void* data,
|
|
|
556 size_t size,
|
|
|
557 const Type* type,
|
|
|
558 const char* name) {
|
|
|
559 return CreateIntToPtr(
|
|
|
560 code_buffer_address(code_buffer()->inline_data(data, size)),
|
|
|
561 type,
|
|
|
562 name);
|
|
|
563 }
|
|
|
564
|
|
|
565 // Helpers for creating basic blocks.
|
|
|
566
|
|
|
567 BasicBlock* SharkBuilder::GetBlockInsertionPoint() const {
|
|
|
568 BasicBlock *cur = GetInsertBlock();
|
|
|
569
|
|
|
570 // BasicBlock::Create takes an insertBefore argument, so
|
|
|
571 // we need to find the block _after_ the current block
|
|
|
572 Function::iterator iter = cur->getParent()->begin();
|
|
|
573 Function::iterator end = cur->getParent()->end();
|
|
|
574 while (iter != end) {
|
|
|
575 iter++;
|
|
|
576 if (&*iter == cur) {
|
|
|
577 iter++;
|
|
|
578 break;
|
|
|
579 }
|
|
|
580 }
|
|
|
581
|
|
|
582 if (iter == end)
|
|
|
583 return NULL;
|
|
|
584 else
|
|
|
585 return iter;
|
|
|
586 }
|
|
|
587
|
|
|
588 BasicBlock* SharkBuilder::CreateBlock(BasicBlock* ip, const char* name) const {
|
|
|
589 return BasicBlock::Create(
|
|
|
590 SharkContext::current(), name, GetInsertBlock()->getParent(), ip);
|
|
|
591 }
|
