Mercurial > projects > ldc
annotate gen/optimizer.cpp @ 1320:1ad5a58b5c9d
Restrict second arg of certain floating-point stores to ST. Fix type postfix
for the two argument form of fistp and fisttp.
author | Christian Kamm <kamm incasoftware de> |
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date | Sat, 09 May 2009 08:58:41 +0200 |
parents | 79b201533cf8 |
children | 42bd767ec5a4 |
rev | line source |
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1 #include "gen/optimizer.h" |
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2 #include "gen/cl_helpers.h" |
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3 |
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4 #include "gen/passes/Passes.h" |
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5 |
125 | 6 #include "llvm/PassManager.h" |
7 #include "llvm/LinkAllPasses.h" | |
8 #include "llvm/Analysis/LoopPass.h" | |
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9 #include "llvm/Analysis/Verifier.h" |
125 | 10 #include "llvm/Target/TargetData.h" |
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11 #include "llvm/Support/CommandLine.h" |
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12 #include "llvm/Support/PassNameParser.h" |
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13 |
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14 #include "root.h" // error() |
125 | 15 |
16 using namespace llvm; | |
17 | |
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18 // Allow the user to specify specific optimizations to run. |
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19 static cl::list<const PassInfo*, bool, PassNameParser> |
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20 passList( |
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21 cl::desc("Running specific optimizations:"), |
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22 cl::Hidden // to clean up --help output |
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23 ); |
125 | 24 |
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25 static cl::opt<unsigned char> optimizeLevel( |
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26 cl::desc("Setting the optimization level:"), |
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27 cl::ZeroOrMore, |
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28 cl::values( |
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29 clEnumValN(2, "O", "Equivalent to -O2"), |
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30 clEnumValN(0, "O0", "No optimizations (default)"), |
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31 clEnumValN(1, "O1", "Simple optimizations"), |
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32 clEnumValN(2, "O2", "Good optimizations"), |
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33 clEnumValN(3, "O3", "Aggressive optimizations"), |
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34 clEnumValN(4, "O4", "Link-time optimization"), // not implemented? |
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35 clEnumValN(5, "O5", "Link-time optimization"), // not implemented? |
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36 clEnumValEnd), |
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37 cl::init(0)); |
125 | 38 |
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39 static cl::opt<bool> |
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40 verifyEach("verify-each", |
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41 cl::desc("Run verifier after each optimization pass"), |
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42 cl::Hidden, |
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43 cl::ZeroOrMore); |
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44 |
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45 static cl::opt<bool> |
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46 disableLangSpecificPasses("disable-d-passes", |
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47 cl::desc("Disable D-specific passes in -O<N>"), |
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48 cl::ZeroOrMore); |
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49 |
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50 static cl::opt<bool> |
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51 disableSimplifyRuntimeCalls("disable-simplify-drtcalls", |
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52 cl::desc("Disable simplification of runtime calls in -O<N>"), |
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53 cl::ZeroOrMore); |
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54 |
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55 #ifdef USE_METADATA |
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56 static cl::opt<bool> |
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57 disableGCToStack("disable-gc2stack", |
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58 cl::desc("Disable promotion of GC allocations to stack memory in -O<N>"), |
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59 cl::ZeroOrMore); |
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60 |
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61 // Not recommended; metadata currently triggers an assert in the backend... |
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62 static cl::opt<bool> |
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63 disableStripMetaData("disable-strip-metadata", |
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64 cl::desc("Disable default metadata stripping (not recommended)"), |
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65 cl::ZeroOrMore); |
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66 #endif |
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67 |
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68 static cl::opt<opts::BoolOrDefaultAdapter, false, opts::FlagParser> |
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69 enableInlining("inlining", |
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70 cl::desc("(*) Enable function inlining in -O<N>"), |
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71 cl::ZeroOrMore); |
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72 |
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73 // Determine whether or not to run the inliner as part of the default list of |
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74 // optimization passes. |
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75 // If not explicitly specified, treat as false for -O0-2, and true for -O3. |
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76 bool doInline() { |
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77 return enableInlining == cl::BOU_TRUE |
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78 || (enableInlining == cl::BOU_UNSET && optimizeLevel >= 3); |
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79 } |
131 | 80 |
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81 // Some extra accessors for the linker: (llvm-ld version only, currently unused?) |
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82 int optLevel() { |
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83 return optimizeLevel; |
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84 } |
125 | 85 |
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86 bool optimize() { |
1267 | 87 return optimizeLevel || doInline() || !passList.empty(); |
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88 } |
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89 |
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90 static void addPass(PassManager& pm, Pass* pass) { |
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91 pm.add(pass); |
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92 |
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93 if (verifyEach) pm.add(createVerifierPass()); |
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94 } |
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95 |
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96 // this function inserts some or all of the std-compile-opts passes depending on the |
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97 // optimization level given. |
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98 static void addPassesForOptLevel(PassManager& pm) { |
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99 // -O1 |
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100 if (optimizeLevel >= 1) |
131 | 101 { |
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102 //addPass(pm, createStripDeadPrototypesPass()); |
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103 addPass(pm, createGlobalDCEPass()); |
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104 addPass(pm, createRaiseAllocationsPass()); |
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105 addPass(pm, createCFGSimplificationPass()); |
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106 if (optimizeLevel == 1) |
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107 addPass(pm, createPromoteMemoryToRegisterPass()); |
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108 else |
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109 addPass(pm, createScalarReplAggregatesPass()); |
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110 addPass(pm, createGlobalOptimizerPass()); |
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111 addPass(pm, createGlobalDCEPass()); |
125 | 112 } |
113 | |
131 | 114 // -O2 |
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115 if (optimizeLevel >= 2) |
125 | 116 { |
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117 addPass(pm, createIPConstantPropagationPass()); |
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118 addPass(pm, createDeadArgEliminationPass()); |
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119 addPass(pm, createInstructionCombiningPass()); |
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120 addPass(pm, createCFGSimplificationPass()); |
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121 addPass(pm, createPruneEHPass()); |
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122 |
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123 #ifdef USE_METADATA |
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124 if (!disableLangSpecificPasses && !disableGCToStack) |
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125 addPass(pm, createGarbageCollect2Stack()); |
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126 #endif |
125 | 127 } |
128 | |
131 | 129 // -inline |
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130 if (doInline()) { |
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131 addPass(pm, createFunctionInliningPass()); |
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132 |
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133 if (optimizeLevel >= 2) { |
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134 // Run some optimizations to clean up after inlining. |
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135 addPass(pm, createScalarReplAggregatesPass()); |
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136 addPass(pm, createInstructionCombiningPass()); |
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137 |
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138 #ifdef USE_METADATA |
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139 if (!disableLangSpecificPasses && !disableGCToStack) |
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140 addPass(pm, createGarbageCollect2Stack()); |
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141 #endif |
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142 |
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143 // Inline again, to catch things like foreach delegates |
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145 // known during the first inliner pass. |
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146 addPass(pm, createFunctionInliningPass()); |
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147 |
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148 // Run clean-up again. |
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149 addPass(pm, createScalarReplAggregatesPass()); |
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150 addPass(pm, createInstructionCombiningPass()); |
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151 |
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152 #ifdef USE_METADATA |
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153 if (!disableLangSpecificPasses && !disableGCToStack) |
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154 addPass(pm, createGarbageCollect2Stack()); |
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155 #endif |
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156 } |
125 | 157 } |
158 | |
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159 if (optimizeLevel >= 2 && !disableLangSpecificPasses) { |
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160 if (!disableSimplifyRuntimeCalls) |
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161 addPass(pm, createSimplifyDRuntimeCalls()); |
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162 |
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163 #ifdef USE_METADATA |
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164 if (!disableGCToStack) { |
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165 // Run some clean-up after the last GC to stack promotion pass. |
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166 addPass(pm, createScalarReplAggregatesPass()); |
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167 addPass(pm, createInstructionCombiningPass()); |
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168 addPass(pm, createCFGSimplificationPass()); |
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169 } |
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170 #endif |
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171 } |
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172 |
131 | 173 // -O3 |
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174 if (optimizeLevel >= 3) |
125 | 175 { |
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176 addPass(pm, createArgumentPromotionPass()); |
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177 addPass(pm, createTailDuplicationPass()); |
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178 addPass(pm, createInstructionCombiningPass()); |
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179 addPass(pm, createCFGSimplificationPass()); |
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180 addPass(pm, createScalarReplAggregatesPass()); |
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181 addPass(pm, createInstructionCombiningPass()); |
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182 addPass(pm, createCondPropagationPass()); |
125 | 183 |
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184 addPass(pm, createTailCallEliminationPass()); |
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185 addPass(pm, createCFGSimplificationPass()); |
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186 addPass(pm, createReassociatePass()); |
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187 addPass(pm, createLoopRotatePass()); |
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188 addPass(pm, createLICMPass()); |
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189 addPass(pm, createLoopUnswitchPass()); |
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190 addPass(pm, createInstructionCombiningPass()); |
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191 addPass(pm, createIndVarSimplifyPass()); |
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192 addPass(pm, createLoopUnrollPass()); |
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193 addPass(pm, createInstructionCombiningPass()); |
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194 addPass(pm, createGVNPass()); |
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195 addPass(pm, createSCCPPass()); |
125 | 196 |
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197 addPass(pm, createInstructionCombiningPass()); |
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198 addPass(pm, createCondPropagationPass()); |
125 | 199 |
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200 addPass(pm, createDeadStoreEliminationPass()); |
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201 addPass(pm, createAggressiveDCEPass()); |
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202 addPass(pm, createCFGSimplificationPass()); |
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203 addPass(pm, createSimplifyLibCallsPass()); |
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204 addPass(pm, createDeadTypeEliminationPass()); |
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205 addPass(pm, createConstantMergePass()); |
125 | 206 } |
207 | |
131 | 208 // level -O4 and -O5 are linktime optimizations |
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209 } |
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210 |
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211 ////////////////////////////////////////////////////////////////////////////////////////// |
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212 // This function runs optimization passes based on command line arguments. |
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213 // Returns true if any optimization passes were invoked. |
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214 bool ldc_optimize_module(llvm::Module* m) |
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215 { |
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216 if (!optimize()) { |
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217 #ifdef USE_METADATA |
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218 if (!disableStripMetaData) { |
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219 // This one always needs to run if metadata is generated, because |
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220 // the code generator will assert if it's not used. |
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221 ModulePass* stripMD = createStripMetaData(); |
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222 stripMD->runOnModule(*m); |
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223 delete stripMD; |
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224 } |
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225 #endif |
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226 return false; |
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227 } |
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228 |
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229 PassManager pm; |
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230 |
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231 if (verifyEach) pm.add(createVerifierPass()); |
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232 |
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233 addPass(pm, new TargetData(m)); |
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234 |
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235 bool optimize = optimizeLevel != 0 || doInline(); |
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236 |
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237 unsigned optPos = optimizeLevel != 0 |
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238 ? optimizeLevel.getPosition() |
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239 : enableInlining.getPosition(); |
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240 |
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241 for (size_t i = 0; i < passList.size(); i++) { |
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242 // insert -O<N> / -enable-inlining in right position |
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243 if (optimize && optPos < passList.getPosition(i)) { |
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244 addPassesForOptLevel(pm); |
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245 optimize = false; |
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246 } |
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247 |
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248 const PassInfo* pass = passList[i]; |
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249 if (PassInfo::NormalCtor_t ctor = pass->getNormalCtor()) { |
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250 addPass(pm, ctor()); |
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251 } else { |
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252 const char* arg = pass->getPassArgument(); // may return null |
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253 if (arg) |
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254 error("Can't create pass '-%s' (%s)", arg, pass->getPassName()); |
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255 else |
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256 error("Can't create pass (%s)", pass->getPassName()); |
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257 assert(0); // Should be unreachable; root.h:error() calls exit() |
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258 } |
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259 } |
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260 // insert -O<N> / -enable-inlining if specified at the end, |
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261 if (optimize) |
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262 addPassesForOptLevel(pm); |
125 | 263 |
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264 #ifdef USE_METADATA |
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265 if (!disableStripMetaData) { |
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266 // This one is purposely not disabled by disableLangSpecificPasses |
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267 // because the code generator will assert if it's not used. |
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268 addPass(pm, createStripMetaData()); |
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269 } |
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270 #endif |
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271 |
131 | 272 pm.run(*m); |
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273 return true; |
125 | 274 } |