[LLVMdev] global variable

Yuxi Chen chenyuxi at uchicago.edu
Wed Mar 4 19:13:07 PST 2015

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, OptAplusOne);


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?


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