[LLVMdev] global variable
jtcriswel at gmail.com
Wed Mar 4 19:48:57 PST 2015
On 3/4/15 10:13 PM, Yuxi Chen wrote:
> Hi all,
> I am newbie for llvm. I just create a global variable, there are some
> statements in my pass like:
> LoadInst* int64_64 = new LoadInst(pthreadPID, "", false, OptAplusOne);
> LoadInst* int32_65 = new LoadInst(gvar_int32_myFlag, "", false,
> But when I run my pass, it generates an error, I don't know why.
> @myFlag = global i32 0, align 4
> @myPid = common global [20 x i64] zeroinitializer, align 16 //this is
> the global,
> %117 = load i64* %t, align 8
> %118 = load i32* @myFlag, align 4
> While deleting: i32* %myFlag
> Use still stuck around after Def is destroyed:@myFlag = global i32
> <null operand!>, align 4
> I am sure I initialize the global variable myFlag, I don't delete this
> global variable.
> Can anyone give some hints, or suggestions?
What code is printing the "While deleting:" text? Is it your code that
prints that, or is it some existing LLVM pass?
It looks like something is trying to remove the myFlag global variable,
but I don't know what code is trying to do that. I suggest you find
that code and figure out why it's trying to remove a global variable
that you're still using.
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Department of Computer Science, University of Rochester
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