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| if(GlobalVariable* GA = M.getGlobalVariable("llvm.global.annotations")) { | |
| // the first operand holds the metadata | |
| for (Value *AOp : GA->operands()) { | |
| // all metadata are stored in an array of struct of metadata | |
| if (ConstantArray *CA = dyn_cast<ConstantArray>(AOp)) { | |
| // so iterate over the operands | |
| for (Value *CAOp : CA->operands()) { | |
| // get the struct, which holds a pointer to the annotated function | |
| // as first field, and the annotation as second field | |
| if (ConstantStruct *CS = dyn_cast<ConstantStruct>(CAOp)) { | |
| if (CS->getNumOperands() >= 2) { | |
| Function* AnnotatedFunction = cast<Function>(CS->getOperand(0)->getOperand(0)); | |
| // the second field is a pointer to a global constant Array that holds the string | |
| if (GlobalVariable *GAnn = | |
| dyn_cast<GlobalVariable>(CS->getOperand(1)->getOperand(0))) { | |
| if (ConstantDataArray *A = | |
| dyn_cast<ConstantDataArray>(GAnn->getOperand(0))) { | |
| // we have the annotation! Check it's an epona annotation and process | |
| StringRef AS = A->getAsString(); | |
| if (AS.startswith(Marker)) { | |
| FuncAnnotations[AnnotatedFunction].emplace_back(AS); | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } |
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/usr/lib/llvm-16/include/llvm/IR/User.h:170: Value *llvm::User::getOperand(unsigned int) const: Assertion `i < NumUserOperands && "getOperand() out of range!"' failed.