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...y 6, 2013 3:09:33 PM > > Subject: [LLVMdev] convert switch stmts to If statements > > > > > > > > > > Hi All, Is there a pass in llvm that converts switch statements to if > > statements? > > > > What do you mean by convert? SelectionDAGBuilder::visitSwitch in > lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp converts the switch > statements for code generation either into indirect jump tables or into > binary-search trees (which I suppose you could call if statements). > > -Hal > > > > > George > > ______________...

...ure out the interface between the LLVM instruction 'SwitchInst' and whatever there is in the backend. > > I would be very happy about every hint where I have to look to find the entry point of switch instructions in the backend (in particular in the MIPS backend. SelectionDAGBuilder::visitSwitch is the general switch lowering... -Eli

Hi Eli, Thank you for the quick reply. On Feb 27, 2012, at 10:03 PM, Eli Friedman wrote: > SelectionDAGBuilder::visitSwitch is the general switch lowering... I understand this lowering is target independent and there is no additional target dependent handling of switch instructions - right? Only branches and jump tables are left after this lowering? Kind regards, Nico

Hi All, Is there a pass in llvm that converts switch statements to if statements? George -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20130506/f06741c4/attachment.html>

...dev at cs.uiuc.edu> > Sent: Monday, May 6, 2013 3:09:33 PM > Subject: [LLVMdev] convert switch stmts to If statements > > > > > Hi All, Is there a pass in llvm that converts switch statements to if > statements? > What do you mean by convert? SelectionDAGBuilder::visitSwitch in lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp converts the switch statements for code generation either into indirect jump tables or into binary-search trees (which I suppose you could call if statements). -Hal > > George > _______________________________________________ > LLV...

...6, 2013 3:09:33 PM > > Subject: [LLVMdev] convert switch stmts to If statements > > > > > > > > > > Hi All, Is there a pass in llvm that converts switch statements to if > > statements? > > > > What do you mean by convert? SelectionDAGBuilder::visitSwitch in lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp converts the switch statements for code generation either into indirect jump tables or into binary-search trees (which I suppose you could call if statements). > > -Hal > > > > > George > > ___________________________...

Hi, I'm interested in any information about implementations of switch instruction and its runtime cost. If it's very target dependent, I'm mostly care about X86. Pointing some LLVM code is also good. - Paweł -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20141027/285f02e5/attachment.html>

Hi, if I want to know how switch instructions are handled in the backend, where do I have to look first? I'm not familiar with the backend framework and I couldn't figure out the interface between the LLVM instruction 'SwitchInst' and whatever there is in the backend. I would be very happy about every hint where I have to look to find the entry point of switch instructions in the

Hi, all I am interested in how jump-table representated in DAG. I find the method visitJumpTable will Emit JumpTable node in the current MBB. visitJumpTableHeader - This function emits necessary code to produce index in the JumpTable from switch case. but how switch case emits? I would like to make this clearly. Thanks, yaoxiao -------------- next part -------------- An HTML attachment

Hello, Fernando. > 1) where, in the LLVM source tree, is the code that creates jump > tables? What do you mean? Switch insts or DAG nodes? The second is created by switch lowering code. Look into SelectionDAGISel.cpp:visitSwitch() -- With best regards, Anton Korobeynikov. Faculty of Mathematics & Mechanics, Saint Petersburg State University.