// increment the vector index counter and loop
mv.visitLabel(l9);
mv.visitIincInsn(counterLocal, 1);
mv.visitJumpInsn(GOTO, l4);
mv.visitLabel(l5);
int numColsLocal = method.reserveLocal(2);
// calculate num cols (length / num rows)
matrix.pushLength(method);
mv.visitVarInsn(ILOAD, numRowsLocal);