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...turn_load", LI); I assume that getCalledValue() will give me the return value of the InitCall CallInst. This compiles fine. But the CastInst cannot be created. The runtime error is : opt: /panfs/panasas-01.cs.wisc.edu/scratch/wang/LLVM/src/llvm/lib/VMCore/Instructions.cpp:2338: llvm::TruncInst::TruncInst(llvm::Value*, const llvm::Type*, const llvm::Twine&, llvm::Instruction*): Assertion `castIsValid(getOpcode(), S, Ty) && "Illegal Trunc"' failed. 0 opt 0x000000000084e8bf 1 opt 0x000000000084f37a 2 libpthread.so.0 0x000000310ac0e930...

Hi, Nick, thanks for the reply. I still have a problem: I only need to "clone" an Instruction, changing its type. That is, I would like to keep all characteristics of the old Instruction and create a new one only with a different type. I am trying create a new Instruction thus: %3 = add nsw i32 %1, %2 ; <i16> [#uses=2] //Old Instruction Value* Op0 = I->getOperand(0); Value*

Oh, no. I should have been more clear. The patch was not rejected, just lost in the daily shuffle. I already have my employer's approval to send this upstream, so I will prepare a patch against trunk this morning. > I proposed a similar patch to LLVM (left circular shift) around 10/2011. > > Parts of my patch did make it into trunk about a year after, but others > > did not.

On Monday, July 30, 2012 12:16 AM, Cameron McInally wrote: > Hey Andy, > > I proposed a similar patch to LLVM (left circular shift) around 10/2011. > Parts of my patch did make it into trunk about a year after, but others > did not. > > At that time, my solution was to add a binary operator to the IRBuilder, > since LCS fits in nicely with the other shift operators. But,

...HANDLE_MEMORY_INST(33, AtomicRMW , AtomicRMWInst ) + LAST_MEMORY_INST(33) // Cast operators ... // NOTE: The order matters here because CastInst::isEliminableCastPair // NOTE: (see Instructions.cpp) encodes a table based on this ordering. - FIRST_CAST_INST(33) -HANDLE_CAST_INST(33, Trunc , TruncInst ) // Truncate integers -HANDLE_CAST_INST(34, ZExt , ZExtInst ) // Zero extend integers -HANDLE_CAST_INST(35, SExt , SExtInst ) // Sign extend integers -HANDLE_CAST_INST(36, FPToUI , FPToUIInst ) // floating point -> UInt -HANDLE_CAST_INST(37, FPToSI , FPToSIInst ) // float...