Bernard Nongpoh via llvm-dev
2016-Aug-12 10:34 UTC
[llvm-dev] Check if getElementPtr Operand
Hello,
consider the following IR code :
%count4 = getelementptr inbounds %struct.r32, %struct.r32* %cur.087, i64 0,
i32 4
How to check in the instruction, whether the operand is a structure or not
if(isa<GetElementPtrInst>(instruction))
{
GetElementPtrInst
*getElementPtrInst=dyn_cast<GetElementPtrInst>(&instruction);
//check if getElemetPtrInst operands structure or array.
}
Thank You
regards,
Bernard Nongpoh
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Take a look at visitGetElementPtrInst in InstructionCombining.cpp for some examples about how to iterate over GEP and check for type. http://llvm.org/docs/doxygen/html/InstructionCombining_8cpp_source.html#l01334 Hope I understood your question correctly. On Fri, Aug 12, 2016 at 6:34 AM, Bernard Nongpoh via llvm-dev < llvm-dev at lists.llvm.org> wrote:> Hello, > consider the following IR code : > %count4 = getelementptr inbounds %struct.r32, %struct.r32* %cur.087, i64 > 0, i32 4 > > How to check in the instruction, whether the operand is a structure or not > > if(isa<GetElementPtrInst>(instruction)) > { > GetElementPtrInst *getElementPtrInst=dyn_cast<GetElementPtrInst>(&instruction); > > //check if getElemetPtrInst operands structure or array. > > } > > Thank You > > regards, > > Bernard Nongpoh > > > > > _______________________________________________ > LLVM Developers mailing list > llvm-dev at lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev > >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20160812/ddcec7b1/attachment.html>
Bernard Nongpoh via llvm-dev
2016-Aug-31 07:16 UTC
[llvm-dev] Check if getElementPtr Operand
Thanks Ryan, I'm able to retrieved the type using the following code: Type *type=getElementPtrInst->getSourceElementType(); On Fri, Aug 12, 2016 at 7:00 PM, Ryan Taylor <ryta1203 at gmail.com> wrote:> Take a look at visitGetElementPtrInst in InstructionCombining.cpp for some > examples about how to iterate over GEP and check for type. > > http://llvm.org/docs/doxygen/html/InstructionCombining_ > 8cpp_source.html#l01334 > > Hope I understood your question correctly. > > On Fri, Aug 12, 2016 at 6:34 AM, Bernard Nongpoh via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > >> Hello, >> consider the following IR code : >> %count4 = getelementptr inbounds %struct.r32, %struct.r32* %cur.087, i64 >> 0, i32 4 >> >> How to check in the instruction, whether the operand is a structure or >> not >> >> if(isa<GetElementPtrInst>(instruction)) >> { >> GetElementPtrInst *getElementPtrInst=dyn_cast<GetElementPtrInst>(&instruction); >> >> //check if getElemetPtrInst operands structure or array. >> >> } >> >> Thank You >> >> regards, >> >> Bernard Nongpoh >> >> >> >> >> _______________________________________________ >> LLVM Developers mailing list >> llvm-dev at lists.llvm.org >> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev >> >> >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20160831/bf590407/attachment.html>