Function llvm_sys::debuginfo::LLVMDIBuilderInsertDeclareBefore

pub unsafe extern "C" fn LLVMDIBuilderInsertDeclareBefore(
    Builder: LLVMDIBuilderRef, 
    Storage: LLVMValueRef, 
    VarInfo: LLVMMetadataRef, 
    Expr: LLVMMetadataRef, 
    DebugLoc: LLVMMetadataRef, 
    Instr: LLVMValueRef
) -> LLVMValueRef

Insert a new llvm.dbg.declare intrinsic call before the given instruction.