LLVM also provides the API to emit an instruction, which inserts a scalar into a vector type. Note that this vector is different from an array. A vector type is a simple derived type that represents a vector of elements. Vector types are used when multiple primitive data are operated in parallel using single instruction multiple data (SIMD). A vector type requires a size (number of elements) and an underlying primitive data type. For example, we have a vector Vec that has four integers of i32 type <4 x i32>. Now, we want to insert the values 10, 20, 30, and 40 at 0, 1, 2, and 3 indexes of the vector.
The insertelement instruction takes three arguments. The first argument is a value of vector type. The second operand is a scalar value whose type must equal the element type of the first operand. The third operand is an index indicating the position at which to insert the value. The resultant value is a vector of the same type.
The insertelement instruction...