I had asked earlier from my another ID about duplicating a basic block, but that server is down for moment.
I was given suggestion to use CloneBasicBlock, but when I used it I get an error :
While deleting: i32* %a
Use still stuck around after Def is destroyed: store i32* %a, i32** %p, align 4
opt: /home/ambika/llvm_3/llvm-2.6/lib/VMCore/Value.cpp:81: virtual llvm::Value::~Value(): Assertion `use_empty() && “Uses remain when a value is destroyed!”’ failed.
0 opt 0x08471218
Aborted
This message is printed inside destructor of class value .
Now I dont understand that after all the instructions are duplicated why does thios kind of error come??
As the message says, the value being destroyed is used. Check users of
this value. You'll have to update them to use something else before
destroying the value. There is not any magic utility that does
everything. Take a look at how CloneBasicBlock is used other places
and try to update your pass accordingly.
I have checked the way it is used in other file, but the problem is whenever I call CloneBasicBlock, after the block is duplicated it tries to delete some variables and I dont understand that why it does that.
I am just trying to duplicate a single block, and that is giving error. I really dont understand why does it wants to delete it…
I have checked the way it is used in other file, but the problem is whenever I call CloneBasicBlock, after the block is duplicated it tries to delete some variables and I dont understand that why it does that.
I am just trying to duplicate a single block, and that is giving error. I really dont understand why does it wants to delete it…
Hi,
I am so sorry for posting the same doubt again.
But I am really stuck with the problem Whichever block I try to duplicate , error always come for last "store" instruction in that basic block.