Mercurial > projects > ldc
annotate gen/asmstmt.cpp @ 756:a58784e0f035
Merge wilsonk's x86-64 inline assembly.
author | Christian Kamm <kamm incasoftware de> |
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date | Sat, 08 Nov 2008 22:29:19 +0100 |
parents | 26fce59fe80a |
children | f04dde6e882c |
rev | line source |
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304 | 1 // Taken from GDC source tree. Original by David Friedman. |
2 // Released under the Artistic License found in dmd/artistic.txt | |
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3 |
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4 #include "gen/llvm.h" |
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5 #include "llvm/InlineAsm.h" |
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6 |
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7 //#include "d-gcc-includes.h" |
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8 //#include "total.h" |
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9 #include "dmd/statement.h" |
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10 #include "dmd/scope.h" |
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11 #include "dmd/declaration.h" |
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12 #include "dmd/dsymbol.h" |
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13 |
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14 #include <cassert> |
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15 #include <deque> |
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16 #include <iostream> |
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17 #include <sstream> |
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18 #include <cstring> |
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19 |
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20 //#include "d-lang.h" |
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21 //#include "d-codegen.h" |
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22 |
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23 #include "gen/irstate.h" |
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24 #include "gen/dvalue.h" |
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25 #include "gen/tollvm.h" |
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26 #include "gen/logger.h" |
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27 #include "gen/todebug.h" |
302 | 28 #include "gen/llvmhelpers.h" |
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29 |
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30 typedef enum { |
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31 Arg_Integer, |
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32 Arg_Pointer, |
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33 Arg_Memory, |
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34 Arg_FrameRelative, |
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35 Arg_LocalSize, |
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36 Arg_Dollar |
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37 } AsmArgType; |
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38 |
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39 typedef enum { |
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40 Mode_Input, |
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41 Mode_Output, |
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42 Mode_Update |
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43 } AsmArgMode; |
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44 |
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45 struct AsmArg { |
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46 AsmArgType type; |
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47 Expression * expr; |
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48 AsmArgMode mode; |
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49 AsmArg(AsmArgType type, Expression * expr, AsmArgMode mode) { |
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50 this->type = type; |
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51 this->expr = expr; |
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52 this->mode = mode; |
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53 } |
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54 }; |
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55 |
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56 struct AsmCode { |
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57 char * insnTemplate; |
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58 unsigned insnTemplateLen; |
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59 Array args; // of AsmArg |
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60 std::vector<bool> regs; |
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61 unsigned dollarLabel; |
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62 int clobbersMemory; |
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63 AsmCode(int n_regs) { |
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64 insnTemplate = NULL; |
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65 insnTemplateLen = 0; |
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66 regs.resize(n_regs, false); |
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67 dollarLabel = 0; |
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68 clobbersMemory = 0; |
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69 } |
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70 }; |
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71 |
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72 AsmStatement::AsmStatement(Loc loc, Token *tokens) : |
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73 Statement(loc) |
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74 { |
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75 this->tokens = tokens; // Do I need to copy these? |
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76 asmcode = 0; |
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77 asmalign = 0; |
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78 refparam = 0; |
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79 naked = 0; |
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80 |
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81 isBranchToLabel = NULL; |
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82 } |
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83 |
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84 Statement *AsmStatement::syntaxCopy() |
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85 { |
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86 // copy tokens? copy 'code'? |
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87 AsmStatement * a_s = new AsmStatement(loc,tokens); |
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88 a_s->asmcode = asmcode; |
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89 a_s->refparam = refparam; |
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90 a_s->naked = naked; |
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91 return a_s; |
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92 } |
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93 |
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94 void AsmStatement::toCBuffer(OutBuffer *buf, HdrGenState *hgs) |
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95 { |
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96 bool sep = 0, nsep = 0; |
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97 buf->writestring("asm { "); |
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98 |
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99 for (Token * t = tokens; t; t = t->next) { |
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100 switch (t->value) { |
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101 case TOKlparen: |
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102 case TOKrparen: |
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103 case TOKlbracket: |
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104 case TOKrbracket: |
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105 case TOKcolon: |
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106 case TOKsemicolon: |
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107 case TOKcomma: |
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108 case TOKstring: |
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109 case TOKcharv: |
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110 case TOKwcharv: |
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111 case TOKdcharv: |
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112 nsep = 0; |
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113 break; |
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114 default: |
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115 nsep = 1; |
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116 } |
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117 if (sep + nsep == 2) |
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118 buf->writeByte(' '); |
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119 sep = nsep; |
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120 buf->writestring(t->toChars()); |
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121 } |
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122 buf->writestring("; }"); |
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123 buf->writenl(); |
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124 } |
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125 |
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126 int AsmStatement::comeFrom() |
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127 { |
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128 return FALSE; |
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129 } |
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130 |
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131 struct AsmParserCommon |
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132 { |
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133 virtual void run(Scope* sc, AsmStatement* asmst) = 0; |
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134 virtual std::string getRegName(int i) = 0; |
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135 }; |
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136 AsmParserCommon* asmparser = NULL; |
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137 |
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138 #include "asm-x86-32.h" |
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139 #include "asm-x86-64.h" |
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140 |
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141 bool d_have_inline_asm() { return true; } |
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142 |
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143 Statement *AsmStatement::semantic(Scope *sc) |
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144 { |
237
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145 bool err = false; |
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146 if ((global.params.cpu != ARCHx86) && (global.params.cpu != ARCHx86_64)) |
237
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147 { |
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148 error("inline asm is not supported for the \"%s\" architecture", global.params.llvmArch); |
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149 err = true; |
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150 } |
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151 if (!global.params.useInlineAsm) |
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152 { |
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153 error("inline asm is not allowed when the -noasm switch is used"); |
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154 err = true; |
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155 } |
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156 if (err) |
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157 fatal(); |
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158 |
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159 sc->func->inlineAsm = 1; |
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160 sc->func->inlineStatus = ILSno; // %% not sure |
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161 // %% need to set DECL_UNINLINABLE too? |
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162 sc->func->hasReturnExp = 1; // %% DMD does this, apparently... |
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163 |
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164 // empty statement -- still do the above things because they might be expected? |
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165 if (! tokens) |
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166 return this; |
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167 |
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168 if (!asmparser) |
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169 if (global.params.cpu == ARCHx86) |
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170 asmparser = new AsmParserx8632::AsmParser; |
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171 else if (global.params.cpu == ARCHx86_64) |
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172 asmparser = new AsmParserx8664::AsmParser; |
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173 |
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174 asmparser->run(sc, this); |
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175 |
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176 return this; |
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177 } |
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178 |
336 | 179 int AsmStatement::blockExit() |
180 { | |
181 //printf("AsmStatement::blockExit(%p)\n", this); | |
182 return BEfallthru | BEreturn | BEgoto | BEhalt; | |
183 } | |
184 | |
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185 void |
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186 AsmStatement::toIR(IRState * irs) |
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187 { |
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188 Logger::println("AsmStatement::toIR(): %s", loc.toChars()); |
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189 LOG_SCOPE; |
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190 |
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191 // sanity check |
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192 assert(irs->func()->decl->inlineAsm); |
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193 |
233
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194 // get asm block |
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195 IRAsmBlock* asmblock = irs->asmBlock; |
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196 assert(asmblock); |
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197 |
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198 // debug info |
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199 if (global.params.symdebug) |
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200 DtoDwarfStopPoint(loc.linnum); |
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201 |
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202 if (! asmcode) |
233
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203 return; |
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204 |
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205 static std::string i_cns = "i"; |
231
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206 static std::string p_cns = "i"; |
222
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207 static std::string m_cns = "*m"; |
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208 static std::string mw_cns = "=*m"; |
223
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209 static std::string mrw_cns = "+*m"; |
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210 static std::string memory_name = "memory"; |
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211 |
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212 AsmCode * code = (AsmCode *) asmcode; |
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213 std::deque<LLValue*> input_values; |
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214 std::deque<std::string> input_constraints; |
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215 std::deque<LLValue*> output_values; |
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216 std::deque<std::string> output_constraints; |
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217 std::deque<std::string> clobbers; |
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218 |
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219 // FIXME |
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220 #define HOST_WIDE_INT long |
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221 HOST_WIDE_INT var_frame_offset; // "frame_offset" is a macro |
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222 bool clobbers_mem = code->clobbersMemory; |
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223 int input_idx = 0; |
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224 int n_outputs = 0; |
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225 int arg_map[10]; |
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226 |
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227 assert(code->args.dim <= 10); |
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228 |
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229 for (unsigned i = 0; i < code->args.dim; i++) { |
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230 AsmArg * arg = (AsmArg *) code->args.data[i]; |
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231 |
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232 bool is_input = true; |
229
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233 LLValue* arg_val = 0; |
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234 std::string cns; |
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235 |
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236 switch (arg->type) { |
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237 case Arg_Integer: |
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238 arg_val = arg->expr->toElem(irs)->getRVal(); |
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239 do_integer: |
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240 cns = i_cns; |
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241 break; |
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242 case Arg_Pointer: |
234
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243 assert(arg->expr->op == TOKvar); |
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244 arg_val = arg->expr->toElem(irs)->getRVal(); |
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245 cns = p_cns; |
220
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246 |
219
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247 break; |
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248 case Arg_Memory: |
229
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249 arg_val = arg->expr->toElem(irs)->getRVal(); |
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250 |
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251 switch (arg->mode) { |
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252 case Mode_Input: cns = m_cns; break; |
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253 case Mode_Output: cns = mw_cns; is_input = false; break; |
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254 case Mode_Update: cns = mrw_cns; is_input = false; break; |
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255 default: assert(0); break; |
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256 } |
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257 break; |
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258 case Arg_FrameRelative: |
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259 // FIXME |
220
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260 std::cout << "asm fixme Arg_FrameRelative" << std::endl; |
229
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261 assert(0); |
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262 /* if (arg->expr->op == TOKvar) |
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263 arg_val = ((VarExp *) arg->expr)->var->toSymbol()->Stree; |
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264 else |
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265 assert(0); |
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266 if ( getFrameRelativeValue(arg_val, & var_frame_offset) ) { |
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267 // arg_val = irs->integerConstant(var_frame_offset); |
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268 cns = i_cns; |
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269 } else { |
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270 this->error("%s", "argument not frame relative"); |
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271 return; |
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272 } |
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273 if (arg->mode != Mode_Input) |
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274 clobbers_mem = true; |
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275 break;*/ |
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276 case Arg_LocalSize: |
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277 // FIXME |
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278 std::cout << "asm fixme Arg_LocalSize" << std::endl; |
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279 assert(0); |
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280 /* var_frame_offset = cfun->x_frame_offset; |
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281 if (var_frame_offset < 0) |
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282 var_frame_offset = - var_frame_offset; |
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283 arg_val = irs->integerConstant( var_frame_offset );*/ |
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284 goto do_integer; |
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285 default: |
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286 assert(0); |
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287 } |
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288 |
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289 if (is_input) { |
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290 arg_map[i] = --input_idx; |
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291 //inputs.cons(tree_cons(NULL_TREE, cns, NULL_TREE), arg_val); |
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292 input_values.push_back(arg_val); |
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293 input_constraints.push_back(cns); |
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294 } else { |
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295 arg_map[i] = n_outputs++; |
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296 //outputs.cons(tree_cons(NULL_TREE, cns, NULL_TREE), arg_val); |
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297 output_values.push_back(arg_val); |
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298 output_constraints.push_back(cns); |
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299 } |
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300 } |
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301 |
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302 // Telling GCC that callee-saved registers are clobbered makes it preserve |
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303 // those registers. This changes the stack from what a naked function |
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304 // expects. |
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305 |
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306 // FIXME |
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307 // if (! irs->func->naked) { |
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308 assert(asmparser); |
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309 for (int i = 0; i < code->regs.size(); i++) { |
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310 if (code->regs[i]) { |
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311 //clobbers.cons(NULL_TREE, regInfo[i].gccName); |
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312 clobbers.push_back(asmparser->getRegName(i)); |
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313 } |
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314 } |
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315 if (clobbers_mem) |
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316 clobbers.push_back(memory_name); |
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317 //clobbers.cons(NULL_TREE, memory_name); |
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318 // } |
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319 |
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320 |
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321 // Remap argument numbers |
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322 for (unsigned i = 0; i < code->args.dim; i++) { |
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323 if (arg_map[i] < 0) |
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324 arg_map[i] = -arg_map[i] - 1 + n_outputs; |
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325 } |
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326 |
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327 bool pct = false; |
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328 char * p = code->insnTemplate; |
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329 char * q = p + code->insnTemplateLen; |
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330 //printf("start: %.*s\n", code->insnTemplateLen, code->insnTemplate); |
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331 while (p < q) { |
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332 if (pct) { |
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333 if (*p >= '0' && *p <= '9') { |
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334 // %% doesn't check against nargs |
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335 *p = '0' + arg_map[*p - '0']; |
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336 pct = false; |
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337 } else if (*p == '$') { |
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338 pct = false; |
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339 } |
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340 //assert(*p == '%');// could be 'a', etc. so forget it.. |
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341 } else if (*p == '$') |
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342 pct = true; |
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343 ++p; |
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344 } |
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345 |
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346 Logger::println("final asm: %.*s", code->insnTemplateLen, code->insnTemplate); |
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347 |
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348 std::string insnt(code->insnTemplate, code->insnTemplateLen); |
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349 |
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350 // rewrite GCC-style constraints to LLVM-style constraints |
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351 std::string llvmOutConstraints; |
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352 std::string llvmInConstraints; |
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353 int n = 0; |
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354 typedef std::deque<std::string>::iterator it; |
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355 for(it i = output_constraints.begin(), e = output_constraints.end(); i != e; ++i, ++n) { |
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356 // rewrite update constraint to in and out constraints |
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357 if((*i)[0] == '+') { |
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358 (*i)[0] = '='; |
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359 std::string input_constraint; |
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360 std::stringstream ss; |
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361 ss << n; |
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362 ss >> input_constraint; |
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363 //FIXME: I think multiple inout constraints will mess up the order! |
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364 input_constraints.push_front(input_constraint); |
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365 input_values.push_front(output_values[n]); |
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366 } |
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367 llvmOutConstraints += *i; |
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368 llvmOutConstraints += ","; |
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369 } |
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370 for(it i = input_constraints.begin(), e = input_constraints.end(); i != e; ++i) { |
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371 llvmInConstraints += *i; |
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372 llvmInConstraints += ","; |
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373 } |
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374 |
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375 std::string clobstr; |
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376 for(it i = clobbers.begin(), e = clobbers.end(); i != e; ++i) { |
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377 clobstr = "~{" + *i + "},"; |
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378 asmblock->clobs.insert(clobstr); |
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379 } |
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380 |
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381 // excessive commas are removed later... |
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382 |
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383 // push asm statement |
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384 IRAsmStmt* asmStmt = new IRAsmStmt; |
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385 asmStmt->code = insnt; |
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386 asmStmt->out_c = llvmOutConstraints; |
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387 asmStmt->in_c = llvmInConstraints; |
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388 asmStmt->out.insert(asmStmt->out.begin(), output_values.begin(), output_values.end()); |
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389 asmStmt->in.insert(asmStmt->in.begin(), input_values.begin(), input_values.end()); |
299
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390 asmStmt->isBranchToLabel = isBranchToLabel; |
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391 asmblock->s.push_back(asmStmt); |
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392 } |
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393 |
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394 ////////////////////////////////////////////////////////////////////////////// |
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395 |
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396 AsmBlockStatement::AsmBlockStatement(Loc loc, Statements* s) |
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397 : CompoundStatement(loc, s) |
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398 { |
309 | 399 enclosinghandler = NULL; |
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400 tf = NULL; |
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401 } |
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402 |
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403 // rewrite argument indices to the block scope indices |
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404 static void remap_outargs(std::string& insnt, size_t nargs, size_t& idx) |
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405 { |
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406 static const std::string digits[10] = |
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407 { |
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408 "0","1","2","3","4", |
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409 "5","6","7","8","9" |
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410 }; |
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411 assert(nargs <= 10); |
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412 |
234
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413 static const std::string prefix("<<out"); |
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414 static const std::string suffix(">>"); |
232
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415 std::string argnum; |
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416 std::string needle; |
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417 char buf[10]; |
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418 for (unsigned i = 0; i < nargs; i++) { |
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419 needle = prefix + digits[i] + suffix; |
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420 size_t pos = insnt.find(needle); |
303 | 421 if(std::string::npos != pos) |
300
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422 sprintf(buf, "%u", idx++); |
302 | 423 while(std::string::npos != (pos = insnt.find(needle))) |
300
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424 insnt.replace(pos, needle.size(), buf); |
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425 } |
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426 } |
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427 |
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428 // rewrite argument indices to the block scope indices |
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429 static void remap_inargs(std::string& insnt, size_t nargs, size_t& idx) |
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430 { |
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431 static const std::string digits[10] = |
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432 { |
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433 "0","1","2","3","4", |
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434 "5","6","7","8","9" |
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435 }; |
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436 assert(nargs <= 10); |
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437 |
234
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438 static const std::string prefix("<<in"); |
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439 static const std::string suffix(">>"); |
232
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440 std::string argnum; |
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441 std::string needle; |
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442 char buf[10]; |
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443 for (unsigned i = 0; i < nargs; i++) { |
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444 needle = prefix + digits[i] + suffix; |
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445 size_t pos = insnt.find(needle); |
303 | 446 if(std::string::npos != pos) |
300
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447 sprintf(buf, "%u", idx++); |
302 | 448 while(std::string::npos != (pos = insnt.find(needle))) |
300
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449 insnt.replace(pos, needle.size(), buf); |
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450 } |
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451 } |
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452 |
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453 void AsmBlockStatement::toIR(IRState* p) |
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454 { |
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455 Logger::println("AsmBlockStatement::toIR(): %s", loc.toChars()); |
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456 LOG_SCOPE; |
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457 Logger::println("BEGIN ASM"); |
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458 |
584
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459 // disable inlining |
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460 gIR->func()->setNeverInline(); |
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461 |
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462 // create asm block structure |
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463 assert(!p->asmBlock); |
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464 IRAsmBlock* asmblock = new IRAsmBlock; |
239
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465 assert(asmblock); |
233
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466 p->asmBlock = asmblock; |
232
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467 |
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468 // do asm statements |
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469 for (int i=0; i<statements->dim; i++) |
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470 { |
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471 Statement* s = (Statement*)statements->data[i]; |
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472 if (s) { |
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473 s->toIR(p); |
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474 } |
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475 } |
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476 |
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477 // build forwarder for in-asm branches to external labels |
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478 // this additional asm code sets the __llvm_jump_target variable |
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479 // to a unique value that will identify the jump target in |
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480 // a post-asm switch |
300
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481 |
312
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482 // maps each goto destination to its special value |
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483 std::map<Identifier*, int> gotoToVal; |
300
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484 |
312
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485 // location of the special value determining the goto label |
302 | 486 // will be set if post-asm dispatcher block is needed |
487 llvm::AllocaInst* jump_target; | |
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488 |
302 | 489 { |
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490 FuncDeclaration* fd = gIR->func()->decl; |
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491 char* fdmangle = fd->mangle(); |
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492 |
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493 // we use a simple static counter to make sure the new end labels are unique |
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494 static size_t uniqueLabelsId = 0; |
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495 std::ostringstream asmGotoEndLabel; |
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496 asmGotoEndLabel << "." << fdmangle << "__llvm_asm_end" << uniqueLabelsId++; |
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497 |
302 | 498 // initialize the setter statement we're going to build |
499 IRAsmStmt* outSetterStmt = new IRAsmStmt; | |
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500 std::string asmGotoEnd = "jmp "+asmGotoEndLabel.str()+" ; "; |
302 | 501 std::ostringstream code; |
502 code << asmGotoEnd; | |
503 | |
504 int n_goto = 1; | |
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505 |
302 | 506 size_t n = asmblock->s.size(); |
507 for(size_t i=0; i<n; ++i) | |
508 { | |
509 IRAsmStmt* a = asmblock->s[i]; | |
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510 |
302 | 511 // skip non-branch statements |
512 if(!a->isBranchToLabel) | |
513 continue; | |
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514 |
302 | 515 // if internal, no special handling is necessary, skip |
516 std::vector<Identifier*>::const_iterator it, end; | |
517 end = asmblock->internalLabels.end(); | |
518 bool skip = false; | |
519 for(it = asmblock->internalLabels.begin(); it != end; ++it) | |
305
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520 if((*it)->equals(a->isBranchToLabel)) |
302 | 521 skip = true; |
522 if(skip) | |
523 continue; | |
524 | |
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525 // if we already set things up for this branch target, skip |
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526 if(gotoToVal.find(a->isBranchToLabel) != gotoToVal.end()) |
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527 continue; |
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528 |
302 | 529 // record that the jump needs to be handled in the post-asm dispatcher |
312
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530 gotoToVal[a->isBranchToLabel] = n_goto; |
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531 |
302 | 532 // provide an in-asm target for the branch and set value |
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533 Logger::println("statement '%s' references outer label '%s': creating forwarder", a->code.c_str(), a->isBranchToLabel->string); |
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534 code << fdmangle << '_' << a->isBranchToLabel->string << ": ; "; |
302 | 535 code << "movl $<<in" << n_goto << ">>, $<<out0>> ; "; |
536 //FIXME: Store the value -> label mapping somewhere, so it can be referenced later | |
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537 outSetterStmt->in.push_back(DtoConstUint(n_goto)); |
302 | 538 outSetterStmt->in_c += "i,"; |
539 code << asmGotoEnd; | |
540 | |
541 ++n_goto; | |
542 } | |
543 if(code.str() != asmGotoEnd) | |
544 { | |
545 // finalize code | |
546 outSetterStmt->code = code.str(); | |
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547 outSetterStmt->code += asmGotoEndLabel.str()+": ; "; |
302 | 548 |
549 // create storage for and initialize the temporary | |
479
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550 jump_target = DtoAlloca(LLType::Int32Ty, "__llvm_jump_target"); |
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551 gIR->ir->CreateStore(DtoConstUint(0), jump_target); |
302 | 552 // setup variable for output from asm |
553 outSetterStmt->out_c = "=*m,"; | |
554 outSetterStmt->out.push_back(jump_target); | |
555 | |
556 asmblock->s.push_back(outSetterStmt); | |
557 } | |
558 else | |
559 delete outSetterStmt; | |
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560 } |
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561 |
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562 |
232
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563 // build asm block |
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564 std::vector<LLValue*> outargs; |
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565 std::vector<LLValue*> inargs; |
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566 std::vector<const LLType*> outtypes; |
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567 std::vector<const LLType*> intypes; |
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568 std::string out_c; |
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569 std::string in_c; |
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570 std::string clobbers; |
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571 std::string code; |
233
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572 size_t asmIdx = 0; |
232
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573 |
302 | 574 size_t n = asmblock->s.size(); |
232
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575 for (size_t i=0; i<n; ++i) |
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576 { |
233
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577 IRAsmStmt* a = asmblock->s[i]; |
232
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578 assert(a); |
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579 size_t onn = a->out.size(); |
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580 for (size_t j=0; j<onn; ++j) |
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581 { |
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582 outargs.push_back(a->out[j]); |
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583 outtypes.push_back(a->out[j]->getType()); |
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584 } |
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585 if (!a->out_c.empty()) |
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586 { |
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587 out_c += a->out_c; |
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588 } |
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589 remap_outargs(a->code, onn+a->in.size(), asmIdx); |
232
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590 } |
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591 for (size_t i=0; i<n; ++i) |
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592 { |
233
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593 IRAsmStmt* a = asmblock->s[i]; |
232
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594 assert(a); |
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595 size_t inn = a->in.size(); |
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596 for (size_t j=0; j<inn; ++j) |
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597 { |
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598 inargs.push_back(a->in[j]); |
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599 intypes.push_back(a->in[j]->getType()); |
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600 } |
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601 if (!a->in_c.empty()) |
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602 { |
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603 in_c += a->in_c; |
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604 } |
300
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605 remap_inargs(a->code, inn+a->out.size(), asmIdx); |
232
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606 if (!code.empty()) |
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607 code += " ; "; |
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608 code += a->code; |
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609 } |
233
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610 asmblock->s.clear(); |
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611 |
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612 // append inputs |
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613 out_c += in_c; |
232
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614 |
233
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615 // append clobbers |
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616 typedef std::set<std::string>::iterator clobs_it; |
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617 for (clobs_it i=asmblock->clobs.begin(); i!=asmblock->clobs.end(); ++i) |
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618 { |
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619 out_c += *i; |
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620 } |
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621 |
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622 // remove excessive comma |
232
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623 if (!out_c.empty()) |
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624 out_c.resize(out_c.size()-1); |
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625 |
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626 Logger::println("code = \"%s\"", code.c_str()); |
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627 Logger::println("constraints = \"%s\"", out_c.c_str()); |
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628 |
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629 std::vector<const LLType*> types; |
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630 types.insert(types.end(), outtypes.begin(), outtypes.end()); |
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631 types.insert(types.end(), intypes.begin(), intypes.end()); |
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632 llvm::FunctionType* fty = llvm::FunctionType::get(llvm::Type::VoidTy, types, false); |
622
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633 if (Logger::enabled()) |
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634 Logger::cout() << "function type = " << *fty << '\n'; |
232
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635 llvm::InlineAsm* ia = llvm::InlineAsm::get(fty, code, out_c, true); |
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636 |
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637 std::vector<LLValue*> args; |
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638 args.insert(args.end(), outargs.begin(), outargs.end()); |
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639 args.insert(args.end(), inargs.begin(), inargs.end()); |
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640 llvm::CallInst* call = p->ir->CreateCall(ia, args.begin(), args.end(), ""); |
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641 |
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642 p->asmBlock = NULL; |
232
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643 Logger::println("END ASM"); |
299
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644 |
302 | 645 // if asm contained external branches, emit goto forwarder code |
312
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646 if(!gotoToVal.empty()) |
302 | 647 { |
648 assert(jump_target); | |
649 | |
650 // make new blocks | |
651 llvm::BasicBlock* oldend = gIR->scopeend(); | |
652 llvm::BasicBlock* bb = llvm::BasicBlock::Create("afterasmgotoforwarder", p->topfunc(), oldend); | |
653 | |
654 llvm::LoadInst* val = p->ir->CreateLoad(jump_target, "__llvm_jump_target_value"); | |
312
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655 llvm::SwitchInst* sw = p->ir->CreateSwitch(val, bb, gotoToVal.size()); |
302 | 656 |
657 // add all cases | |
312
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658 std::map<Identifier*, int>::iterator it, end = gotoToVal.end(); |
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659 for(it = gotoToVal.begin(); it != end; ++it) |
302 | 660 { |
661 llvm::BasicBlock* casebb = llvm::BasicBlock::Create("case", p->topfunc(), bb); | |
312
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662 sw->addCase(llvm::ConstantInt::get(llvm::IntegerType::get(32), it->second), casebb); |
302 | 663 |
664 p->scope() = IRScope(casebb,bb); | |
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665 DtoGoto(&loc, it->first, enclosinghandler, tf); |
302 | 666 } |
667 | |
668 p->scope() = IRScope(bb,oldend); | |
669 } | |
219
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670 } |
232
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671 |
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672 // the whole idea of this statement is to avoid the flattening |
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673 Statements* AsmBlockStatement::flatten(Scope* sc) |
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674 { |
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675 return NULL; |
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676 } |
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677 |
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678 Statement *AsmBlockStatement::syntaxCopy() |
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679 { |
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680 Statements *a = new Statements(); |
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681 a->setDim(statements->dim); |
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682 for (size_t i = 0; i < statements->dim; i++) |
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683 { |
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684 Statement *s = (Statement *)statements->data[i]; |
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685 if (s) |
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686 s = s->syntaxCopy(); |
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687 a->data[i] = s; |
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688 } |
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689 AsmBlockStatement *cs = new AsmBlockStatement(loc, a); |
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690 return cs; |
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691 } |
302 | 692 |
693 // necessary for in-asm branches | |
694 Statement *AsmBlockStatement::semantic(Scope *sc) | |
695 { | |
309 | 696 enclosinghandler = sc->tfOfTry; |
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697 tf = sc->tf; |
302 | 698 |
699 return CompoundStatement::semantic(sc); | |
700 } |