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</o:shapelayout></xml><![endif]--></head><body lang=EN-IE link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>I have a large number of instruction patterns that involves a lot of replication in TableGen.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>To reduce this replication I want to use ‘</span><span style='font-size:12.0pt;font-family:"Courier New",serif'>foreach</span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>’, but in this case the action is operating on ‘</span><span style='font-size:12.0pt;font-family:"Courier New",serif'>multiclass</span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>’ and ‘</span><span style='font-size:12.0pt;font-family:"Courier New",serif'>defm</span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>’. Basically I want to make the following work:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Courier New",serif'> foreach item = { “ReplA”, “ReplB”, ... , “ReplZ” } in {<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Courier New",serif'> defm PRE_#item#_POST : BASE_#item#_SUFF<.....>;<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Courier New",serif'> }<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>Unfortunately TableGen doesn’t handle this for ‘</span><span style='font-size:12.0pt;font-family:"Courier New",serif'>multiclass</span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>’ and ‘</span><span style='font-size:12.0pt;font-family:"Courier New",serif'>defm</span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>’, so I have made adaptations to ‘</span><span style='font-size:12.0pt;font-family:"Courier New",serif'>lib/TableGen/TGParser.*</span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>’ that would allow this to happen. In this code I have a variable ‘</span><span style='font-size:12.0pt;font-family:"Courier New",serif'>idFragment</span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>’ that represents the iteration variable name for the ‘</span><span style='font-size:12.0pt;font-family:"Courier New",serif'>foreach</span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>’ loop. Next I want to perform the substation, but I can see how I get the current value to perform the replacement. My code is:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Courier New",serif'> for (ForeachLoop var: Loops) {<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Courier New",serif'> if (var.IterVar->getName() == idFragment) {<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>but having identified where to perform the replacement, I can’t find how to get the current value to replace ‘</span><span style='font-size:12.0pt;font-family:"Courier New",serif'>item</span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>’ with {e.g. is it ‘</span><span style='font-size:12.0pt;font-family:"Courier New",serif'>ReplF</span><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>’?}<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>Any hints on how I can do this? The normal replacement code I find very hard to follow.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'> MartinO<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Book Antiqua",serif'><o:p> </o:p></span></p></div></body></html>